:Euclid Creek

Euclid Creek is a stream which originates in Cuyahoga County, Ohio. It flows through Cuyahoga County and a small portion of Lake County before emptying into Lake Erie.{{sfn|Division of Surface Water|2005|page=vi}} Euclid Creek is one of about 100 streams that drain directly into the lake.{{sfn|Euclid Creek Watershed Council|2006|page=8}} Doan Brook and Euclid Creek are the largest of the minor tributaries of Lake Erie.{{sfn|Cushing|Leverett|Van Horn|1931|page=19}}

The stream consists of a main branch, an east branch, and several named and unnamed tributaries. Many sources say that the main branch extends from the mouth of the stream about {{convert|11.5|mi|km}} upstream, where an east branch and west (or south) branch meet.{{sfn|Euclid Creek Watershed Council|2006|page=28}} The watershed drained by this segment of the creek is about {{convert|3|sqmi|km2}} in size.{{sfn|Division of Surface Water|2005|page=vi}} However, the Ohio Environmental Protection Agency (Ohio EPA) treats the main branch and west branch as a single main branch, which is the description used in this article.{{sfn|Division of Surface Water|2005|page=4}} Upstream from the confluence of the two streams, the main/west branch extends for another {{convert|16|mi|km}} and drains a watershed of about {{convert|8.5|sqmi|km2}}. The east branch is {{convert|19|mi|km}} long and drains a watershed of about {{convert|12.5|sqmi|km2}}.{{sfn|Division of Surface Water|2005|page=4}} The main branch and east branch (exclusive of tributaries) are a combined {{convert|46.5|mi|km}} long, with a combined watershed approximately {{convert|24|sqmi|km2}} in size.{{sfn|Division of Surface Water|2005|page=vi}} More than 100 streams make up the headwaters of Euclid Creek.{{sfn|Euclid Creek Watershed Council|2006|page=37}}

The Euclid Creek watershed is one of the most highly urbanized areas of the Lake Erie coastline in Ohio.{{sfn|Euclid Creek Watershed Council|2006|page=7}} The watershed contains 11 cities, 10 of which are in Cuyahoga County.{{sfn|Euclid Creek Watershed Council|2006|page=8}}{{cite news|last=Kuehner|first=John C.|title=Dam Seen As Barrier to Euclid Creek Future|work=The Plain Dealer|date=May 11, 2005|page=B3}} About 68,000 people live in the watershed.{{sfn|Division of Surface Water|2005|page=vi}}

Euclid Creek has an average grade of {{convert|55|ft/mi}}, or 1.04 percent, a very high gradient for a stream.{{sfn|Division of Surface Water|2005|page=vi}} The gradient varies from place to place along the creek. Near its headwaters, the grade is {{convert|37|ft/mi}}, while within the Euclid Reservation Metropark the grade increases to {{convert|58|ft/mi}}. In the lacustuary near its mouth,{{Efn|Between 9,000 and 6,000 years ago, Lake Erie was roughly {{convert|15|ft|m}} lower than it is today.{{cite journal|last1=Holcombe|first1=Troy L.|last2=Taylor|first2=Lisa A.|last3=Reid|first3=David F.|last4=Warren|first4=John S.|last5=Vincent|first5=Peter A.|last6=Herdendorf|first6=Charles A.|title=Revised Lake Erie Postglacial Lake Level History Based on New Detailed Bathymetry|journal=Journal of Great Lakes Research|date=December 2003|page=698|access-date=April 22, 2018|url=https://www.glerl.noaa.gov/pubs/fulltext/2003/20030021.pdf}} Euclid Creek's mouth was then located much farther north of its present location, and the channel was about {{convert|20|ft|m}} deeper. When lake water levels rose, they drowned the mouth of the creek as far north as present Lakeshore Blvd., creating the lacustuary the creek's mouth.{{sfn|Larick|Gibbons|Siplock|2005|page=15}}}} the grade is just {{convert|0.1|ft/mi}}.{{sfn|Division of Surface Water|2005|page=4}}

File:Euclid Creek near second bridge - Euclid Creek Reservation.jpg

Euclid Creek flows over bedrock more than 360 million years old.{{sfn|Division of Surface Water|2005|page=4}} This includes the 365 million year old{{sfn|Camp|2006|page=113}} Chagrin Shale,{{sfn|Prosser|1913|page=376}} the 360 million year old{{cite news|last=Harding|first=Megan|title=Cleveland Shale and the Age of Fishes|work=The Explorer|date=Spring 1996|page=20}} Cleveland Shale,{{sfn|Prosser|1913|page=376}} the 358.9 million year old{{sfn|Boenigk|Wodniok|Glücksman|2016|page=99}} Bedford Formation,{{sfn|Prosser|1913|page=376}} the 360 million year old{{sfn|Carter|Flaherty|2011|page=179}} Berea Sandstone,{{Efn|The age of the Berea Sandston is difficult to estimate due to the lack of diagnostic fossils. The age given is therefore a very rough approximation.{{cite journal|last=Hansen|first=Michael C.|title=The Geology of Ohio—The Mississippian|journal=Ohio Geology|issue=2|date=2001|page=3|access-date=April 15, 2018|url=http://geosurvey.ohiodnr.gov/portals/geosurvey/PDFs/Newsletter/2001No.2.pdf}}}} and the 354.8 to 351.4 million year old Orangeville Shale of the Cuyahoga Formation.{{sfn|Prosser|1913|page=376}}{{Efn|The Orangeville Shale is the oldest member of the Cuyahoga Formation. The age of the Cuyahoga Formation is difficult to estimate due to the lack of diagnostic fossils. The age of the Orangeville Shale is therefore a very rough approximation.{{cite journal|last1=Ausich|first1=William I.|last2=Guenther|first2=Robert L.|title=Blastoids from the Cuyahoga Formation of Ohio (Echinodermata; Lower Mississippian)|journal=Kirtlandia|date=February 1996|page=2|access-date=April 8, 2018|url=https://www.biodiversitylibrary.org/page/51810150#page/43/mode/1up}}}} The Berea Sandstone is highly resistant to erosion, and the highest waterfalls on Euclid Creek occur where the stream has cut down to the Berea.{{sfn|Division of Surface Water|2005|page=5}}

Topographically, the underlying geology creates three distinct areas: The Allegheny Plateau, the Portage Escarpment, and the Erie Plain.{{sfn|Euclid Creek Watershed Council|2006|page=29}} The headwaters of both the main and east branch are located on the Allegheny Plateau. The two streams descend over the steep terraces of the Portage Escarpment before reaching the relatively flat Erie Plain and draining into Lake Erie.{{cite report|last=Williams|first=Arthur B.|title=The Native Forests of Cuyahoga County, Ohio|location=Cleveland|publisher=Cleveland Museum of Natural History|date=January 1949|page=11|access-date=May 7, 2018|url=https://archive.org/details/scientificpublic69clev}} The Late stage of the Wisconsin glaciation (the last ice age) began about 85,000 years ago,{{sfn|Dawson|2016|page=45}} and in Ohio reached as far south as the Portage Escarpment before stopping.{{sfn|Szabo|Angle|Eddy|2011|page=513}} This ice sheet not only shaped the relief of the land—leaving behind low rounded hills, irregular plains, and depressions that turned into wetlands{{sfn|Euclid Creek Watershed Council|2006|page=28}}—but also left glacial till and erratics over most of the bedrock.{{sfn|Division of Surface Water|2005|page=5}} A low morainic ridge, the Euclid Moraine, appears east of Euclid Creek.{{sfn|Cushing|Leverett|Van Horn|1931|page=14}}{{sfn|Leverett|1902|page=652}} This morainic ridge extends {{convert|2|mi|km}} to Willoughby, Ohio, from Euclid Creek.{{sfn|Leverett|1902|page=652}} A portion of the east branch flows along the south edge of this moraine.{{sfn|Cushing|Leverett|Van Horn|1931|page=19}}

The Chagrin Shale exposed by Euclid Creek contains many different arthropod fossils, including Camarotoechia, Lingula, Nucleata, Orbiculoidea, and five species of Echinocaris.{{cite journal|last1=Weidner|first1=William E.|last2=Feldmann|first2=Rodney M.|title=Paleoecological Interpretation of Echinocarid Arthropod Assemblages in the Late Devonian (Famennian) Chagrin Shale, Northeastern Ohio|journal=Journal of Paleontology|volume=59|number=4|date=July 1985|pages=986–1004|jstor=1304943}} A lone fossil of a decapod, Palaeopalaemon, and indeterminate fragments of the crustacean Mesothyra, have also been found.{{cite report|last1=Sturgeon|first1=Myron T.|last2=Hlavin|first2=William J.|last3=Kesling|first3=Robert V.|title=Rare Crustaceans From the Upper Devonian Chagrin Shale in Northern Ohio. Contributions from the Museum of Paleontology, The University of Michigan|volume=19|number=5|pages=47–64|date=September 22, 1964|location=Ann Arbor, Mich.|publisher=Museum of Paleontology, The University of Michigan|access-date=May 5, 2018|url=https://deepblue.lib.umich.edu/bitstream/handle/2027.42/48384/ID229.pdf?sequence=2&isAllowed=y}} In 1960, a new species of lobe-finned fish, Chagrinia enodis, was found eroded out of the Chagrin Shale in the Euclid Creek Reservation.{{cite report|last=Schaeffer|first=Bob|title=A coelacanth fish from the Upper Devonian of Ohio. Scientific Publications of the Cleveland Museum of Natural History, New Series|location=Cleveland|publisher=Cleveland Museum of Natural History|date=1962|pages=1–3}}{{sfn|Forey|1997|pages=346-347}}

The Cleveland Shale along Euclid Creek is known to contain limited fossil remains. Fragments of what may be the plant Sporangites have been identified.{{sfn|Cushing|Leverett|Van Horn|1931|page=38}} Brachiopod fossils by be found in some places in the formation's topmost layers. These are generally Lingula and Orbiculoidea, although on very rare occasions other species may be found.{{sfn|Cushing|Leverett|Van Horn|1931|page=37}} Another fossil, once believed to be the arthropod Spathiocaris{{sfn|Cushing|Leverett|Van Horn|1931|page=37}} but in 2017 reinterpreted to be an ammonoid aptychus,{{cite journal|last1=Goolaerts|first1=Stijn|last2=Denayer|first2=Julien|last3=Mottequin|first3=Bernard|title=Late Devonian (Frasnian) phyllopod and phyllocarid crustacean shields from Belgium reinterpreted as ammonoid anaptychi|journal=The Science of Nature|volume=104|issue=11–12|date=December 2017|page=98|doi=10.1007/s00114-017-1522-0|pmid=29101477|bibcode=2017SciNa.104...98G |s2cid=5567326}} may also be found. Fossil fish teeth, scales, and sometimes bones or armor are the most frequent fossils found. A review in 2008 identified 65 vertebrate taxa, represented primarily by Chondrichthyes (32 species), Placodermi (28 species), and Osteichthyes (five species).{{cite book|last1=Carr|first1=Robert K.|last2=Jackson|first2=Gary L.|chapter=The Vertebrate Fauna of the Cleveland Member (Famennian) of the Ohio Shale|title=Guide to the Geology and Paleontology of the Cleveland Member of the Ohio Shale. Ohio Geological Survey Guidebook 22|editor-last=Hannibal|editor-first=J.T.|location=Cleveland|publisher=Ohio Geological Survey|date=2010|page=10|url=https://www.researchgate.net/publication/213769842}}

Where exposed by Euclid Creek, the Bedford Shale usually contains an extensive fossil record{{sfn|Cushing|Leverett|Van Horn|1931|pages=43-44}} in its bottommost part.{{sfn|Collins|1979|page=E-17}} These include brachiopods like Lingula, Orbiculoidea, and the large Syringothyris bedfordensis; mollusks, particularly bivalves;{{sfn|Collins|1979|page=E-17}} and Devonian fish.{{sfn|Pepper|DeWitt|Demarest|1954|page=15}}

File:Main and east branch confluence - Euclid Creek Reservation.jpg

The Geographic Names Information System of the United States Geological Survey places the headwaters of the main/west branch of Euclid Creek between Fairmount Blvd. and Fairwood Court in Beachwood, Ohio ({{coord|41|29|13.0|N|81|29|25.1|W}}). The Division of Surface Water of the Ohio Environmental Protection Agency places the headwaters roughly {{convert|0.5|mi|km}} to the north, on the Acacia Reservation of the Cleveland Metroparks in Lyndhurst, Ohio ({{coord|41|30|18.7|N|81|29|37.3|W}}).{{sfn|Division of Surface Water|2005|page=vi}} Both are at an elevation of {{convert|1200|ft|m}} above mean sea level.{{sfn|Division of Surface Water|2005|pages=vi, 4}} This is an area of hummocks and knolls with soil that ranges from poorly drained to moderately well drained. Soil permeability is slow to moderately slow.{{sfn|Euclid Creek Watershed Council|2006|page=31}}

The main branch of Euclid Creek gently meanders over a nearly level plateau through the cities of Lyndhurst, Mayfield Heights, Richmond Heights, South Euclid, and Euclid. Soil permeability improves in Richmond Heights, South Euclid, and Euclid, ranging from moderately slow to moderately rapid.{{sfn|Euclid Creek Watershed Council|2006|page=31}} After passing down the Portage Escarpment, the stream flows across the loamy, fine-sand, lacustrine sediment of the Erie Plain. Here the soil is moderately well drained and rapidly permeable.{{sfn|Euclid Creek Watershed Council|2006|page=32}} Much of the main branch's streambed was determined by the Wisconsin glaciation.{{sfn|Division of Surface Water|2005|page=5}}{{Efn|The Wisconsin glaciation is primarily responsible for the drainage patterns in Ohio. At first, the glaciers extended southward across northern Ohio. As they retreated, water flowing from the melting glaciers carved channels which drained southward to the Ohio River. When the glaciers retreated north the Portage Escarpment, the water was trapped between the glaciers and the Portage Escarpment, creating ever-larger lakes. As the glaciers retreated northward again, the water found an outlet through the St. Lawrence River. Water on the Appalachian Plateau now began flowing north, carving new drainage valleys through the lake-facing side of the escarpment and the Erie Plain.{{sfn|Hubbard|Stauffer|Bownocker|Prosser|1915|pages=18-19}}}}

The main branch passes through some of the most densely urbanized land in Cuyahoga County. There is little remaining floodplain or intact stream banks. Poor soil permeability for much of the stream's length and the extensive impervious surfaces of the urban landscape contribute to flash flood-like stream flows. These flows inhibit the quantity and diversity of fish and aquatic insect populations.{{sfn|Euclid Creek Watershed Council|2006|page=44}}

Where it drops over the Portage Escarpment, the main branch has carved a {{convert|2.75|mi|km|adj=on}} long gorge.{{sfn|Board of Park Commissioners|1919|page=35}}{{Efn|This gorge is geologically "new", in that it was not carved by a preglacial river or a glacier. It was carved by Euclid Creek after the last ice age.{{sfn|Cushing|Leverett|Van Horn|1931|page=16}} There is a north-flowing glacial meltwater channel between Euclid Creek and the Chagrin River.{{sfn|Leverett|1902|page=670}}}} At the head (south end) of the gorge, at what is now the intersection of E. Green Road and Anderson Road, the stream tumbles over a waterfall.{{sfn|Larick|Gibbons|Siplock|2005|page=14}} The gorge is {{convert|100|ft|m}}{{sfn|Wood|1901|page=24}} to {{convert|180|ft|m}} deep{{sfn|Orth|1910a|page=21}} and an average of {{convert|600|ft|m}} wide.{{sfn|Orth|1910a|page=21}}{{sfn|Wood|1901|page=24}} Euclid Creek meanders across the flat bottom of the gorge,{{sfn|Wood|1901|page=25}} where it has carved a channel {{convert|10|ft|m}} deep into the alluvial soil and the shale rock.{{sfn|Wood|1901|page=24}} Although the depth of Euclid Creek in the gorge is usually no more than ankle- to knee-deep, the stream has eroded a few deep potholes in the shale streambed, some up to {{convert|8|ft|m}} deep.{{cite news|last=Marrison|first=Benjamin|title=Metroparks Posts Warning Where Girl Drowned in Creek|work=The Plain Dealer|date=June 23, 1990|page=B2}}

Emerging from this gorge about where Euclid Avenue and Chardon Road meet today, the creek meanders across the Erie Plain,{{sfn|Wood|1901|page=24}} a relatively flat area with low, rolling hills.{{cite news|last=Beal|first=Eileen|title=Area Development Began Nearly Two Centuries Ago|work=The Plain Dealer|date=August 15, 1994|page=A8}} It has carved a channel {{convert|200|ft|m}} wide and {{convert|40|ft|m}} deep in the Erie Plain.{{sfn|Larick|Gibbons|Siplock|2005|page=25}}

The mouth of Euclid Creek is located on Lake Erie at {{coord|41|35|10.2366|N|81|33|54.8166|W}},{{sfn|Euclid Creek Watershed Council|2006|page=8}} {{convert|570|ft|m}} above mean sea level.{{sfn|Division of Surface Water|2005|page=vi}}

The headwaters of the east branch of Euclid Creek are located near Interstate 271, about {{convert|400|ft|m}} south of 32500 Chardon Road in Willoughby Hills, Ohio ({{coord|41|34|48.4|N|81|26|57.8|W}}).{{sfn|Euclid Creek Watershed Council|2006|page=97}} The elevation at these headwaters is about {{convert|860.5|ft|m}} above mean sea level. The east branch joins the main/west branch of the stream in the Euclid Creek Reservation{{sfn|Euclid Creek Watershed Council|2006|page=49}}{{Efn|Euclid Creek Reservation consists of two noncontiguous sections. The section downstream from Lakeshore Boulevard is referred to in this article as "Lower Euclid Creek Reservation", while the much larger section upstream of Euclid Avenue and Chardon Road is referred to as "Euclid Creek Reservation."}} of the Cleveland Metroparks about {{convert|400|ft|m}} south-southeast of the intersection of Highland Road and Metropark Drive ({{coord|41|33|40.4|N|81|31|50.7|W}}). The elevation at the confluence of the two branches is about {{convert|651.9|ft|m}}.

From its headwaters, the east branch flows mostly along an east-west roughly paralleling the Portage Escarpment in a deep ravine. Although the stream banks are nearly all intact and the ravine eliminates any chance for a floodplain, nearly all the tributaries of the east branch have been channelized, culvertized, and lost their floodplain due to urban development.{{sfn|Euclid Creek Watershed Council|2006|page=44}}

File:Euclid creek watershed.jpg

The Euclid Creek watershed is almost unique among Ohio streams in that it contains no agricultural land and is more than 80 percent developed.{{sfn|Euclid Creek Watershed Council|2006|page=64}} The undeveloped land is projected to become built up within the next few decades by light industrial, office, residential, and retail construction. Residential development is likely to be apartment buildings or clustered townhouses, keeping with a national trend away from single-family homes. This will put new pressure on the water quality of Euclid Creek.{{sfn|Euclid Creek Watershed Council|2006|page=66}} Cuyahoga County Airport is the largest landowner within the watershed. Six east branch tributaries travel through, under, or adjacent to the airport's {{convert|640|acre|km2}}.{{sfn|Euclid Creek Watershed Council|2006|page=80}}

About {{convert|557.8|acre|km2}} of Euclid Creek's watershed is protected. This includes the {{convert|209|acre|km2}} of the Lower Euclid Creek Reservation{{Efn|Lower Euclid Creek Reservation was originally three parks and a marina owned by the city of Cleveland: Euclid Beach Park, Villa Angela, Wildwood Park, and Wildwood Marina/Wildwood Yacht Club. For many years, the city leased these properties to the state of Ohio, which branded and managed them as part of the state park system. That relationship ended in 2013, when the city turned over management of the properties to Cleveland Metroparks, the independent regional park agency. Metroparks placed all the properties into its Euclid Creek Reservation.{{cite news|last=Ewinger|first=James|title=Ceremony marks launch of Lakefront Reservation|work=The Plain Dealer|date=June 7, 2013|page=A1|access-date=April 18, 2018|url=http://www.cleveland.com/metro/index.ssf/2013/06/cleveland_metroparks_state_of_ohio.html}}}} and {{convert|345|acre|km2}} of the Euclid Creek Reservation. The combined reservation is one of the most heavily-used parks in the Cleveland Metroparks system. Weekend use in the summer routinely exceeds park capacity, causing compaction of soil, litter, and illegal dumping.{{sfn|Euclid Creek Watershed Council|2006|page=76}} The Cuyahoga Soil and Water Conservation District owns two conservation easements (totaling {{convert|13.8|acre|km2}}) covering the headwaters of Euclid Creek in Lyndhurst and Mayfield.{{sfn|Euclid Creek Watershed Council|2006|page=78}} The city of Richmond Heights owns a conservation easement over the ravine and wetlands of Verbsky Creek, and has imposed an environmental deed restriction over Claribel Creek between Richmond Heights City Hall and Richmond Heights Community Park.

Few wetlands remain in the Euclid Creek watershed. Notable wetlands exist adjacent to Highland Heights Community Park, at the headwaters of a major tributary of the east branch; the Acacia Reservation; and portions of the floodplain of the east branch. The health of these wetlands is not known.{{sfn|Euclid Creek Watershed Council|2006|page=42}}

The stream's watershed has seven distinctive subwatersheds.{{sfn|Euclid Creek Watershed Council|2006|page=48}} These are:

Subwatershed 1: Erie Plains in the Nottingham neighborhood—This {{convert|23|sqmi|km2|adj=on}} area contains {{convert|3|mi|km}} of the main branch stream, between Lake Erie/Lower Euclid Creek Reservation and the Euclid Creek Reservation. About 6 percent of this area is undeveloped, and more than 25 percent is covered with impervious surfaces such as parking lots or buildings. The Lake Erie coastline and Euclid Creek lacustuary have been highly modified to accommodate bathing beaches, marinas, onshore developments, parks, piers, and other developments and uses. Marshlands and an oxbow have been removed, although partial floodplain and stream restoration have occurred. Between the park and Interstate 90, Euclid Creek is highly channelized, although a riparian zone exists on either side that shields the stream from the dense urban development adjacent to it. At Villaview Road, the stream enters a long tunnel that takes it beneath Interstate 90. It briefly emerges at E. 185th Street, where the St. Clair Spillway helps keep stream velocity low.{{Efn|By keeping the streambed level until it passes the tunnel and by impounding some water, the kinetic energy of the current is significantly reduced, which helps prevent scouring.}} The creek then enters a short tunnel to pass beneath the CSX railroad tracks. Between the railroad tracks and the Euclid Creek Reservation, much of Euclid Creek runs in a concrete channel completed as part of a flood control project. Shoaling (the accumulation of debris and sediment) has worsened in this area, reducing the effectiveness of the flood control measure.{{sfn|Euclid Creek Watershed Council|2006|page=46}} Extensive illegal dumping occurs in the creek between Lakeshore Blvd. and the Euclid Creek Reservation.{{sfn|Euclid Creek Watershed Council|2006|page=48}}

Subwatershed 2: Euclid Creek Reservation—This {{convert|10|sqmi|km2|adj=on}} area contains {{convert|6.8|mi|km}} of the main branch stream and tributaries in the Euclid Creek Reservation. About 20 percent of this area is undeveloped, with 11 to 15 percent covered with impervious surfaces such as building rooftops, lawns, and parking lots. The watershed here is largely natural, and is enclosed in a deep, broad valley whose walls are mostly bedrock. Limited illegal dumping occurs in the park, and the creek's water quality is affected by polluted surface runoff from nearby residential areas after heavy storms.{{Efn|Some light industry exists on Green Road, which runs roughly parallel to the park's west border. Lax pollution control management at some of these sites is delivering pollutants into the creek after heavy storms.{{sfn|Euclid Creek Watershed Council|2006|page=49}}}} Verbsky Creek,{{cite report|last=Gase|first=Lee|title=Appendix A. A Resolution Establishing Names for All of the Significant Streams in Richmond Heights That Drain Into Euclid Creek and the East Branch of Euclid Creek. Resolution No.: 14-2007|publisher=City of Richmond Heights, Ohio|date=February 2007|pages=A-2—A-3|access-date=April 18, 2018|url=http://richmondheightsohio.org/pdf_RichmondHeights/en-US/Legislation/2007/14-2007.pdf}}{{cite web|title=Richmond Heights Stream Names|website=Cuyahoga Soil and Water Conservation District|date=2013|access-date=April 18, 2018|url=http://www.cuyahogaswcd.org/euclid-creek/programs/richmond-heights-stream-names}} a roughly {{convert|1.5|mi|km|adj=on}} long tributary, joins the east branch just before the east branch's confluence with the main branch. It runs west of Highland Road, crossing to the east of the street about {{convert|200|ft|m}} east of the intersection of Georgetown Road and Hilltop Road. It crosses Highland Road again and turns south between Highland Ridge Drive and Donna Drive, passing through and under residential developments. Redstone Run, a {{convert|2.65|mi|km}} stream, joins Verbsky Creek just before Verbsky Creek crosses east of Highland Road. It travels east-southeast through a heavily forested ravine bordered by housing developments before turning south north of Hillcrest Drive. Flowing through a series of culverts, tunnels, and open ditches, it crosses Highland Road just west of Karl Drive, flows southeast for about {{convert|250|ft|m}}, turns south and runs between Harris Drive and Catlin Drive for about {{convert|800|ft|m}}, then runs southeast to just north of the intersection of Jefferson Lane and Monticello Place. It then travels east to Richmond Road, where its headwaters formerly began beneath what is now Richmond Town Square mall.{{sfn|Euclid Creek Watershed Council|2006|page=49}}

Subwatershed 3: Lower East Branch—This {{convert|12.5|sqmi|km2|adj=on}} area contains {{convert|7.8|mi|km}} of the east branch stream and four tributaries in the cities of Richmond Heights and Highland Heights. About 23 percent of this area is undeveloped, with 11 to 25 percent covered with impervious surfaces. Euclid Creek flows through a ravine with steep hillsides in this subwatershed, which has largely discouraged alterations to the stream, banks, and adjacent riparian areas. Residential development in this subwatershed consists primarily of single-family homes on large lots, which has kept impervious surfaces and population impacts low. There is some water quality impairment due to illegal dumping (primarily along Chardon Road), septic system overflows, impervious surface runoff, and poor land management (primarily erosion and fertilizer-based pollutants). A weir dam and pond obstructs the east branch west of Bishop Road.{{Efn|Ponds and small lakes on Euclid Creek were created as flood control measures. All the existing ponds are filling with sediment and will lose their flood control effectiveness in the future.{{sfn|Euclid Creek Watershed Council|2006|pages=75-76}}}} Stevenson Brook, a {{convert|1.9|mi|km|adj=on}} long tributary, enters the east branch north of the end of Balmoral Drive. It travels largely south-southeast through a deep and heavily forested ravine, paralleling Balmoral Drive and then Douglas Blvd., before turning southeast and crossing Highland Road via a culvert at Snavely Road. The stream continues southeast in an open channel until it crosses Richmond Road north of Foxlair Trail. It travels largely east to begin in a retention pond north of Loxley Drive. The ravine adjacent to Douglas Blvd. contains a masonry dam, behind which is a small, silted-up lake. The remains of several other dam structures exist on Stevenson Brook downstream of this dam, and there may be remains of gristmills or sawmills as well. Claribel Creek, a {{convert|1.9|mi|km|adj=on}} long tributary, enters the east branch northwest of the end of Country Lane. It largely parallels Royal Oak and Cary Jay Blvds., flowing southeast and then south. Southeast of the intersection of Euclid Chagrin Parkway and Cary Jay Blvd., the Mayfair Dam impounds the {{convert|4|acre|km2|adj=on}} Mayfair Lake. At the southern end of the lake, the stream runs through a series of channels and culverts and turns southeast and then east-southeast, crossing Highland Road east of the intersection with Richmond Park East. It then turns southeast and then south, running between Charles Place and Sunbury Drive. A small tributary enters the east branch south of Edgemont Road, moving south between Knollwood and Bridgeport Trails and passing through a heavily wooded area south of Allendale Road before turning east to cross Richmond Road and enter the grounds of the Cuyahoga County Airport. Another tributary joins the east branch to the east of the eastern end of Brushview Drive. It travels southeast and is impeded by two weir dams before crossing White Road east of Patricia Drive. It travels south-southeast through the Cuyahoga County Airport grounds before crossing Bishop Road north of Euclid Chagrin Parkway. It continues in a largely southern direction to terminate northeast of the intersection of Bishop Road and Canterbury Lane.{{sfn|Euclid Creek Watershed Council|2006|page=51}} These three large and two small tributaries originate in broad, shallow streambeds on the Appalachian Plateau,{{sfn|Cushing|Leverett|Van Horn|1931|page=20}} then enter deep valleys as they come down the Portage Escarpment. Upper portions of the tributaries tend to be heavily impacted by development, while the lower portions are not.{{sfn|Euclid Creek Watershed Council|2006|page=51}}

File:Headwaters - Euclid Creek.jpg

Subwatershed 4: Upper East Branch—This {{convert|3.2|sqmi|km2|adj=on}} area contains {{convert|6.3|mi|km}} of the east branch stream and four tributaries in the cities of Highland Heights and Willoughby Hills. About 17 percent of this area is undeveloped, and about 11 to 25 percent is covered with impervious surfaces. Although channelization, culvertization, stream straightening, and other changes have been made to them, some portions of the tributaries retain their natural channels, banks, and floodplains.{{sfn|Euclid Creek Watershed Council|2006|page=53}}

Subwatershed 5: Upper East Branch/Chagrin Plateau—This {{convert|3.5|sqmi|km2|adj=on}} area contains {{convert|5.3|mi|km}} of the east branch in the cities of Highland Heights, Willoughby Hills, and Mayfield Heights. About 25 percent of this area is undeveloped, and about 10 to 20 percent is covered with impervious surfaces. Heavily channelized, sometimes in a concrete streambed, Euclid Creek's east branch forms just west of Interstate 271.{{sfn|Euclid Creek Watershed Council|2006|page=55}}{{Efn|Euclid Creek at one time ran along what is now the west side of Interstate 271 as far south as Wilson Mills Blvd. before turning southwest to end near the intersection of Ridgebury Blvd. and Lander Road. This channel is now a man-made, grass-filled drainage ditch next to the interstate highway, with some culverts to carry water after heavy precipitation.{{sfn|Euclid Creek Watershed Council|2006|page=55}}}}

Subwatershed 6: Highlands—This {{convert|2.8|sqmi|km2|adj=on}} area contains {{convert|3.1|mi|km}} of the main branch in the cities of Lyndhurst and Mayfield Heights. About 3 percent of this area is undeveloped, and is more than 25 percent covered with impervious surfaces. This subwatershed includes a large unnamed tributary of Euclid Creek, which enters the main branch near the north end of Euclid Creek Reservation. All but the last {{convert|0.5|mi|km}} of the tributary have been buried in tunnels, culvertized, and channelized. The last portion, south of Edenhurst Road, remains largely natural.{{sfn|Euclid Creek Watershed Council|2006|page=57}}

Subwatershed 7: Headwaters—This {{convert|5.17|sqmi|km2|adj=on}} area contains {{convert|6|mi|km}} of the main branch in the cities of South Euclid, Lyndhurst, and Beachwood. About 7 percent of this area is undeveloped, and it is 10 to 25 percent covered with impervious surfaces. This subwatershed is highly residential. Channelization using gabions is common in the residential areas, although a few floodplains remain north of Mayfield Road. The stream maintains its natural state as it passes through the Mayfield Sand Ridge Club (a private golf course) and through the Acacia Reservation of the Cleveland Metroparks.{{sfn|Euclid Creek Watershed Council|2006|page=59}} A culvert allows the creek to pass beneath Mayfield Road{{cite news|last=Thoma|first=Pauline|title=Congress Prolongs Drivers' Agony|work=The Plain Dealer|date=February 2, 1987|page=B2}} Upstream of the Acacia Reservation, the headwaters are extremely channelized, culvertized, and contained in a man-made streambed.{{sfn|Euclid Creek Watershed Council|2006|page=59}}

There were five dams on Euclid Creek as of 2017.{{sfn|Euclid Creek Watershed Council|2006|page=90}} None of them generate power or provide flood control,{{sfn|Division of Surface Water|2005|page=26}} and all of them impede the movement of fish and aquatic resources vital to the health of Euclid Creek. The dams are:

• St. Clair Spillway—This {{convert|9|to|10|ft|m|adj=on}} high concrete spillway impedes the migration of fish on Euclid Creek, and has negatively affected the habitat around it.{{sfn|Euclid Creek Watershed Council|2006|pages=90-91}}
• David Myers Parkway Dam—This {{convert|3|to|4|ft|m|adj=on}} high concrete weir dam helps reduce the velocity of the stream as it passes between David Myers Parkway and the parking lot of The Hamptons apartment complex (west of the creek).{{sfn|Euclid Creek Watershed Council|2006|pages=90-91}}
• Mayfair Dam—This dam, located at 25959 Highland Road in Richmond Heights at the site of the former Mayfair Tennis and Swim Club, impounds the {{convert|4|acre|km2|adj=on}} Mayfair Lake. A pipe acts as a spillway to permit water from the lake to continue down Euclid Creek.{{cite news|last=Geiger|first=Mark|title=Officials say RH club is clogging spillway|work=The News-Herald|date=August 28, 2002|access-date=April 18, 2018|url=http://www.news-herald.com/article/HR/20020828/NEWS/308289982}} Since at least 1988, the lake has been highly eutrophic, and sediment buildup at its southern end has created a shallow delta that limits its use.{{sfn|U.S. Environmental Protection Agency|1988|page=4-17}}
• Dumbarton Blvd. Dam—This {{convert|12|to|14|ft|m|adj=on}} high masonry dam{{sfn|Euclid Creek Watershed Council|2006|pages=90-91}} is located about {{convert|400|ft|m}} north of the intersection of Dumbarton Blvd. and Douglas Blvd. Built some time in the 1800s, it once impounded a substantial reservoir. It is silted up, and now only a small pond exists.
• White Road Dam—This dam impounds roughly {{convert|600|ft|m}} of a tributary of the east branch. A causeway, carrying the access driveway to 27511 White Road, is pierced by a culvert.{{sfn|Euclid Creek Watershed Council|2006|pages=90-91}}

The Euclid Creek Reservation Dam, an {{convert|8|ft|m|adj=on}} high weir dam, was removed in December 2010.{{sfn|Euclid Creek Watershed Program|2017|page=10}}{{cite news|last=Frischkorn|first=Jeffrey L.|title=Work under way to remove a Euclid Creek dam dating back to 1933|work=The News-Herald|date=November 24, 2010|access-date=April 4, 2018|url=http://www.news-herald.com/article/HR/20101124/NEWS/311249995}} This dam helped reduce the velocity of the east branch as it passed beneath the bridge carrying Highland Avenue, significantly reducing the chance of scouring.{{sfn|Euclid Creek Watershed Council|2006|page=91}}

Another 10 small detention ponds or basins exist within the Euclid Creek watershed. These ponds, which are both publicly and privately owned, are in-line with the stream and provide stormwater overflow control. Another seven to 15 privately-owned, in-line ponds on Euclid Creek provide aesthetic enhancements to landowners. The benefit these provide in terms of water quality and habitat enhancement have not been assessed. Many are filling with sediment.{{sfn|Euclid Creek Watershed Council|2006|page=95}}

About {{convert|10.4|mi|km}} (24.18 percent) of Euclid Creek are culverted or contained within a buried tunnel.{{sfn|Euclid Creek Watershed Program|2017|page=6}} This includes 9 percent of the main branch downstream of Euclid Creek Reservation, 18 percent of the east branch, and 32 percent of the main/west branch.{{sfn|Division of Surface Water|2005|page=4}}

About {{convert|4.7|mi|km}} (10.9 percent) of Euclid Creek are channelized. Channelization includes armoring (with concrete banks), confining (by making banks higher and more vertical), entrenchment (deepening the channel), gabioning, and straightening. Channelization is intended to prevent flooding during normal precipitation events. However, by confining the stream, channelization also strengthens the velocity of stream flow. This degrades fish and aquatic insect habitat, and worsens erosion and flooding during extreme precipitation events. A 2003 study by the Northeast Ohio Regional Sewer District (NEORSD) found that {{convert|16|mi|km}} of Euclid Creek showed moderate to high levels of erosion due to channelization.{{sfn|Euclid Creek Watershed Council|2006|page=94}}

As early as 1922, scientists determined that Euclid Creek was "badly contaminated" by raw sewage.{{sfn|Ellms|1922|page=191}}

Violations of state and federal water quality laws and regulations were common in Euclid Creek throughout the 1970s and 1980s.{{sfn|Division of Surface Water|2005|page=v}}

Between 1977 and 2005, nearly all illegal and illicit industrial sources of pollution were eliminated and most sewage treatment plant discharges.{{sfn|Division of Surface Water|2005|page=8}} However, pollution control has remained somewhat elusive. A 1986 study found that Euclid Creek from the confluence of the main and east branch north to Lake Erie had poor water quality. The stream had high to extremely high levels of fecal coliform (a harmful, disease-causing bacteria), phenols, total iron, and total lead.{{sfn|U.S. Environmental Protection Agency|1988|page=4-22}} The nearshore environment at the mouth of the creek was also in poor condition, with high levels of ammonia, copper, iron, manganese, nickel, total phosphorus, and zinc. There were also elevated levels of fecal coliform.{{sfn|U.S. Environmental Protection Agency|1988|page=4-20}}

The Nottingham Intake and Filtration Plant was barred from dumping waste into the creek in February 1988, although it continued to do so at least until 1990.{{cite news|last=Breckenridge|first=Tom|title='Trickle' Turns to Sludge Surge in Euclid Creek|work=The Plain Dealer|date=June 7, 1990|page=B1}} As late as 1989, the creek downstream of Euclid Avenue still ran black with chemical and oil pollution. A major nonsource pollution event in 1989 killed six salmon and 40 to 50 suckerfish in the creek, and Ohio EPA officials feared there were no more fish living in the creek.{{cite news|title=Fish Found Dead Along Euclid Creek|work=The Plain Dealer|date=May 24, 1989|page=C5}} A NEORSD sewage treatment plant was still venting daily into Euclid Creek in 1991 near the intersection of St. Clair Avenue and E. 185th Street.{{cite news|last=Breckenridge|first=Tom|title=District Pumps $5 Million Into Project|work=The Plain Dealer|date=January 2, 1991|page=B1}} The city of Willoughby Hills inaugurated a four-year sewage improvement project (the Euclid Creek Tributary Interceptor) in May 2000 designed to end sewage overflows into the east branch of Euclid Creek{{cite news|last=Hollander|first=Sarah|title=Willoughby Hills Forms Sewage Plan|work=The Plain Dealer|date=May 18, 2000|page=B1|postscript=none}}; {{cite news|last=Lawless|first=James|title=Sewer Plan Is Biggest Project OK'd for Grant|work=The Plain Dealer|date=October 27, 2001|page=B3}}

According to samples taken in 2000, levels of fecal coliform had dropped in the main and east branch below federal water quality standards, although several tributaries still did not meet the standard.{{sfn|Division of Surface Water|2005|pages=vi, 11-12}} Low levels of dissolved oxygen, detected in the late 1990s and early 2000s, also appear to have been corrected.{{sfn|Division of Surface Water|2005|page=1}} Although levels of phosphorus have been significantly reduced since 1977, 30 percent of Euclid Creek areas sampled in 2003 were above the target level of {{convert|0.07|mg/L}}.{{sfn|Division of Surface Water|2005|page=10}}

As of 2005, Euclid Creek still suffered from a number of pollution and pollution-related impairments. These included: Excessive organic matter in the water, high levels of nutrients,{{Efn|Urban and suburban surface runoff, and the use of fertilizer, is the most important source of these high levels of nutrients.{{sfn|Division of Surface Water|2005|page=2}}}} and elevated levels of disease-causing bacteria. The major sources of pollution were combined sewer overflows during periods of high precipitation,{{Efn|This affects only the last {{convert|1.6|mi|km}} of the stream.{{sfn|Division of Surface Water|2005|page=1}}}} nonpoint sources, septic tank overflows, and polluted stormwater.{{sfn|Division of Surface Water|2005|pages=vi-v}}

The creek continues to be impaired by disease-causing bacteria. The creek failed fecal coliform standards 42 percent of the time in 2007.{{cite news|last=Scott|first=Michael|title=Beach Bacteria Level Worst in Nation|work=The Plain Dealer|date=August 11, 2007|page=A1}} Fecal coliform levels at the mouth of the creek were, at times, in the thousands of parts per 100 milliliters in 2008. In comparison, most Cleveland area swimming areas had fecal coliform levels in the teens per 100 milliliters (or even lower).{{cite news|last=Scott|first=Michael|title=Safe to Go in the Water?|work=The Plain Dealer|date=May 24, 2008|page=A1}} Euclid Creek failed fecal coliform standards 59 percent of the time in 2008, making it one of the ten most polluted swimming spots in the nation, according to the Natural Resources Defense Council.{{cite news|last=Scott|first=Michael|title=Water at 2 Beaches Among Worst in U.S.|work=The Plain Dealer|date=May 24, 2008|page=B3}} The Natural Resources Defense Council declared Euclid Creek the most polluted stream in the Greater Cleveland region in 2011. It continued to receive more than 80 sewage overflows each summer, compared to a national average of two or three.{{cite news|last=Feran|first=Tom|title=Sewage Enters Lake 80 Times a Season|work=The Plain Dealer|date=January 4, 2011|page=B1}} This fell to 60 times a year in 2013.{{cite news|last=Zeltner|first=Brie|title=Ohio Beaches Are America's Worst in Water Quality, New Report Says|work=The Plain Dealer|date=July 15, 2013|page=B1}}

Pollution control in Euclid Creek is the responsibility of several agencies and governments. The Northeast Ohio Regional Sewer District provides sewerage in the Euclid Creek watershed, with the exception of Willoughby Hills and some unsewered areas. The Cuyahoga Soil and Water Conservation District is the lead conservation agency overseeing the stream and its watershed.{{sfn|Euclid Creek Watershed Council|2006|page=11}} Various departments and agencies of Cuyahoga County oversee water quality, watershed health, and economic and residential development. The Ohio Coastal Management Program, a division of the Ohio Department of Natural Resources (ODNR), is charged by the federal Coastal Zone Management Act of 1972 with protecting and sustaining the nearshore portion of Lake Erie into which Euclid Creek empties.{{sfn|Euclid Creek Watershed Council|2006|page=12}}

The Division of Surface Water of the Ohio Environmental Protection Agency has designated the main branch downstream of Anderson Road a Warmwater Habitat,{{Efn|This means the stream should be capable of sustaining an integrated, balanced biological community that includes the most common kinds of aquatic life.{{cite report|last=Heitzman|first=Bob|title=Ohio Water Quality Standards (OAC 3745-1) Overview|publisher=Division of Surface Water, Ohio Environmental Protection Agency|date=April 2004|access-date=April 19, 2018|url=http://www.epa.ohio.gov/portals/35/wqs/WQS_overview_Apr04.pdf}}}} while the remainder of the stream and its tributaries are a Limited Resource Water.{{sfn|Division of Surface Water|2005|page=6}}{{Efn|This means this portion of the stream has little or no potential for aquatic life, and that it has irretrievably been modified from its natural state.}} The section of Euclid Creek between Anderson Road and Euclid Avenue (that contained in the Euclid Creek Reservation) has been designated a State Resource Water,{{sfn|Division of Surface Water|2005|page=6}} which subjects it to anti-degradation rules established by the Ohio EPA.{{sfn|Division of Surface Water|2015|page=3}} Ohio EPA has also classified the majority of Euclid Creek as a Primary Contact Recreation Water,{{sfn|Division of Surface Water|2005|page=6}} indicating it should be safe for human beings to fully immerse themselves in without protection.{{sfn|Division of Surface Water|2015|page=3}}

File:Chironomus plumosus01.jpg

From prehistoric times into the late 1800s, Lake Erie and its tributaries maintained a healthy fishery.{{sfn|Craig|2000|pages=171-175}} Euclid Creek was no exception: In the late 1800s, catfish, crappies, largemouth bass, suckers, sunfish,{{sfn|Larick|Gibbons|Siplock|2005|page=56}} and shorthead redhorse{{cite news|last=Sterling|first=E.|title=The Whitefish of the Great Lakes|work=The American Angler|date=September 11, 1886|page=163|access-date=April 25, 2018|url=https://books.google.com/books?id=V1wvAAAAYAAJ&q=%22Euclid+Creek%22&pg=PA163}} were all caught on a regular basis in Euclid Creek. Even the occasional lake sturgeon was found in the creek. In 1918, anglers were regularly catching catfish, shorthead redhorse, suckers, and yellow perch in Euclid Creek. Carp were, by then, also extremely common, and the occasional bass could still be found.{{cite news|title=Here Are Nearby Streams To Fish|work=The Plain Dealer|date=March 31, 1918|page=C4}}

Pollution and other impairments led to significant losses in the number and diversity of species by the 1960s. A 1964 study found that invertebrate species were limited to black flies, crayfish, crane flies, flatworms, leeches, mayflies, snipe flies, and seven species of midge. The only game fish which remained in the creek were the hogsucker, green sunfish, and white sucker. Coho salmon and rainbow trout (also known as steelhead) were observed entering the creek, but no spawning occurred. Pollution-tolerant minnow species were the only small fish to remain. These included the central stoneroller, common creek chub, common shiner, emerald shiner, and western blacknose dace. The east branch had a greater diversity of fish than the main branch, but was much less diverse than the nearby Big Creek or Chagrin River.{{sfn|U.S. Environmental Protection Agency|1988|page=4-35}} A 1978 survey found 11 species of frog and toad, 13 species of reptile, and 12 species of salamander in or near Euclid Creek. The most common reptile was the box turtle.{{sfn|U.S. Environmental Protection Agency|1988|page=4-33}}

File:Creek Chub, Semotilus atromaculatus.jpg

Pollution impairment of Euclid Creek worsened by 1984. Water quality was poor in all portions of the stream.{{sfn|U.S. Environmental Protection Agency|1988|page=4-44}} Orthocladiinae (a subspecies of midge) and Oligochaeta (sludgeworms) constituted 65 percent of all fauna collected in or near the stream. The other invertebrates found in any number included caddisflies, mayflies, and stoneflies.{{sfn|U.S. Environmental Protection Agency|1988|page=4-39}} At a sampling site near the intersection of Green and Anderson Roads, only small numbers of fish were present, and many of these were infected with fungus or were dead.{{sfn|U.S. Environmental Protection Agency|1988|pages=4-41-4-42}} The east branch of Euclid Creek exhibited the most species diversity of any segment of the stream. Its lower {{convert|2|mi|km}}, however, were grossly enriched due to flows from a sewage treatment plant.{{sfn|U.S. Environmental Protection Agency|1988|page=4-45}} Species diversity was about as good in the stream segment encompassed by the Euclid Creek Reservation, although the number of animals was much lower. This portion of Euclid Creek appeared to be significantly impacted by nonpoint sources.{{sfn|U.S. Environmental Protection Agency|1988|page=4-46}} All fauna in the creek was found to be moderately to highly stressed by pollution.{{sfn|U.S. Environmental Protection Agency|1988|page=4-39}}

By the late 20th century, only sucker fish survived in Euclid Creek upstream of its lacustuary, and they vanished by 2000.{{sfn|Larick|Gibbons|Siplock|2005|page=56}}

Fish populations in Euclid Creek remain impaired,{{Efn|Euclid Creek is not stocked with fish by the Ohio Department of Natural Resources.{{sfn|Euclid Creek Watershed Council|2006|page=39}}}} exhibiting low diversity and a high percentage of pollution-tolerant species. Top-of-the-food-chain predatory fish are absent from the creek, a common indicator of an unhealthy stream habitat.{{sfn|Division of Surface Water|2005|page=11}} Above the St. Clair Spillway, fish populations are primarily pollution-tolerant minnows{{sfn|Division of Surface Water|2005|page=vi}} such as the central stoneroller, common creek chub, and western blacknose dace. Darters are absent, and this limits the capacity of the stream.{{sfn|Euclid Creek Watershed Council|2006|page=39}} Below the spillway, coho salmon,{{sfn|Weber|Bailey|DuFresne|1997|page=81}} rainbow trout,{{cite news|last=Kelch|first=Dave|title=Steelhead Trout: Lake Erie's Best Kept Secret|work=Twine Line|date=November 2001|pages=1–3|access-date=March 4, 2018|url=http://ohioseagrant.osu.edu/archive/_documents/publications/FS/FSTL-001%20Steelhead%20LE%20Secret%20Excerpt.pdf}} and smallmouth bass{{sfn|Division of Surface Water|2005|page=vi}} may be found.{{Efn|Occasionally, lake fish like Chinook salmon find their way into Euclid Creek below the St. Clair Spillway.{{cite news|title=Area Fishing|work=The Plain Dealer|date=October 19, 1990|page=D8}} A pink salmon was discovered in Euclid Creek in 2014. Cleveland Metroparks staff called the fish's presence highly unusual.{{cite news|last=Egan|first=D'Arcy|title=Large Pink Salmon Turns Up in Euclid Creek|work=The Plain Dealer|date=September 26, 2014|page=B3}}}} Improving the nearshore and lacustuary areas of Euclid Creek are important to increasing the diversity, health, and viability of fish populations in Euclid Creek.{{sfn|Euclid Creek Watershed Council|2006|page=40}} No fish consumption advisories have been issued by the Ohio Department of Health for fish caught in Euclid Creek.{{sfn|Euclid Creek Watershed Council|2006|pages=109-110}}

Non-fish macroinvertebrate populations are less impaired than fish in Euclid Creek. The diversity, health, and number of macroinvertebrates in the lower watershed meet ODNR water quality standards, although this is not true for the upper watershed (upstream of Euclid Creek Reservation). The macroinvertebrate population is dominated by pollution-tolerant species like midges and worms, with only low levels of caddisfly, mayfly, and stonefly present.{{sfn|Division of Surface Water|2005|pages=vi, 11}}

{{clear}}

File:Phragmites australis Schilfrohr.jpg

Although no wildlife survey of Euclid Creek had been conducted as of 2006, anecdotal evidence indicates that wildlife supported by the stream is typical of that found in an urban area with extensive greenspace: beaver, great blue heron, mink, red fox, white-tailed deer, wild turkey, and a small (and perhaps transient) population of coyotes in the Acacia Reservation.{{sfn|Euclid Creek Watershed Council|2006|page=37}} Although no known endangered or threatened amphibian, fish, invertebrate, or mammal is known to exist in the Euclid Creek watershed, the lack of extensive studies means that their presence cannot be ruled out.{{sfn|Euclid Creek Watershed Council|2006|page=40}}

Only a small number of areas, limited in size, have been studied to identify plant species within the Euclid Creek watershed. One endangered plant and two uncommon plants are known to exist in the area. Solidago puberula ("downy goldenrod") is a perennial herb listed as endangered in Ohio by ODNR. The only known stable population of this plant species in Ohio is found in Highland Heights Community Park near the headwaters of a tributary of the east branch of Euclid Creek. Hypericum gentianoides (a species of St. John's wort commonly known as "orangegrass" or "pineweed") and Rhynchospora capitellata (a species of sedge commonly known as "brownish beaksedge" or "brownish beaked-rush") are also found in wet areas of Highland Heights Community Park. This is the only known location in Cuyahoga County for either species.{{sfn|Euclid Creek Watershed Council|2006|page=40}}

As a highly disturbed stream, Euclid Creek is heavily impacted by a large number of invasive plant species. Phragmites australis (a perennial grass) is extremely common north of Euclid Creek Reservation and in nearly all places where the stream banks have been disturbed. Alliaria petiolata (garlic mustard) and Reynoutria japonica (Japanese knotweed) are found extensively north of Euclid Creek Reservation. Other common invasive species throughout the watershed include autumn olive, buckthorn, several species of bush honeysuckle, Canada thistle, Japanese honeysuckle, multiflora rose, narrow-leaf cattail, purple loosestrife, reed canary grass, Russian olive, and tree of heaven.{{sfn|Euclid Creek Watershed Council|2006|page=41}}

Human beings first settled in northeast Ohio about 11,000 BCE, at the end of the Wisconsin Glaciation.{{sfn|Redmond|2009|page=179}} This highly nomadic hunting culture, known as Paleo-Indian, disappeared about 8,000 BCE, replaced by the nomadic hunter-gatherer Archaic culture.{{sfn|Redmond|2006|page=3}} About 2,500 BCE, this culture was in turn replaced by the semi-sedentary Woodland culture.{{sfn|Redmond|2006|page=7}}{{sfn|Redmond|2009|page=179}} A warming trend in the global climate about 800 CE created more agriculturally favorable weather in Ohio, which led to the development of subsistence farming.{{sfn|Ricky|1998|page=13}} A new society emerged, the Whittlesey culture (named for 19th century Ohio scientist Charles Whittlesey).{{sfn|Redmond|2006|page=8}}{{Efn|The Whittlesey people disappeared before contact with Europeans. The names they gave themselves, and almost everything about them, remains unknown—except for what may be gleaned from archeological digs.{{sfn|Redmond|2009|page=179}}}} Between 1600 and 1650 CE, the Whittlesey people disappeared.{{sfn|Redmond|2009|page=179}} The cause—absorption into another culture, disease, emigration, low birth rate, warfare, or some combination of factors—is not known. By the time the Iroquois of what is now central New York began moving along the shore of Lake Erie into northeast Ohio in 1650 during the Beaver Wars, the area was almost uninhabited. In the early and mid 1700s, the Mingo,{{Efn|The name "Mingo" is a corruption of the Algonquian language word "mingwe", which means "treacherous". Fleeing the Iroquois during the Beaver Wars, refugees from the Lenape (Delaware), Ouendat, Seneca, Shaawanwaki (Shawnee), and Susquehannock tribes merged to form a new tribal entity, the Mingo. They were joined in 1817 by some members of the Cayuga, who had sold their land in New York state.{{sfn|Leahy|Wilson|2016|page=194}}}} Odawa (or Ottawa), and Ouendat (or Wyandot) occupied northern Ohio after fleeing the Iroquois.{{Efn|The Ouendat, also known as Wendat and Wyandot, consisted of several distinct but culturally and linguistically related tribes. Early French explorers called one group of Wendat tribes Huron, for their wild (heures, in French) hairstyles. Another group was called the Petun, French for "tobacco". Thus, the Petun were also known as the Tobacco Nation.{{sfn|Garrad|2014|pages=1–2}} Fleeing the Iroquois during the Beaver Wars, remnants of these two groups fled to the Ohio country and reunited under the name Ouendat/Wendat/Wyandot.{{sfn|Waldman|2006|pages=110–112}}}} By 1800, Native American emigration out of the area was occurring again, and few indigenous people lived anywhere in Ohio by 1850.{{sfn|Redmond|2006|page=9}}

The Whittlesey people and their predecessors left behind well-defined trails that ran along ridges paralleling Lake Erie. These ridges are the remains of ancient beaches, deposited by prehistoric versions of Lake Erie during times when the lake water levels were much higher.{{sfn|Cushing|Leverett|Van Horn|1931|page=68}}{{Efn|Euclid Avenue was deposited by Lake Warren, an ancestor of Lake Erie which formed as the Wisconsin glaciation retreated north. The lake levels were about {{convert|670|ft|m}} higher during this period than they are today.{{sfn|Cushing|Leverett|Van Horn|1931|pages=68, 78}}}} Several of these ridge trails crossed Euclid Creek, and served as the primary route by which white explorers and settlers began moving west into northern Ohio. These Native American trails are now Lakeshore Blvd., Euclid Avenue, and St. Clair Avenue.{{sfn|Larick|Gibbons|Siplock|2005|page=15}}

Native Americans found it difficult to access the Appalachian Plateau from the Erie Plain due to the steepness of the Portage Escarpment. Only a few natural access points existed; Euclid Creek was one of these. Modern Nottingham Road/Dille Road was originally a Native American trail which ran along the southern rim of the Euclid Creek gorge to the plateau, while modern Neff Road/Chardon Road ran along the northern rim.{{sfn|Larick|Gibbons|Siplock|2005|page=15}}

File:Euclid Township 1858.jpg

White settlement of the Euclid Creek area began when some log cabins were erected on the shore of Lake Erie east of the stream probably in the summer of 1795. Who built them, and why, is not known, and they were abandoned by the spring of 1796.{{sfn|Whittlesey|1867|page=211}} The area around Euclid Creek was surveyed and Euclid Township established in 1796. The surveyors, trained in mathematics, named the township after the Greek mathematician Euclid.{{sfn|Johnson|1879|page=452}} Returning east in October 1796, the survey team led by Moses Cleaveland gave the name Euclid Creek to the large creek they encountered between Doan Brook and the Chagrin River.{{sfn|Larick|Gibbons|Siplock|2005|page=17}}

A Connecticut Land Company survey team returned to the area in 1797 and blazed two major routes through the area, North Highway (now St. Clair Avenue) and Central Highway (now Euclid Avenue).{{sfn|Hartman|1991|page=19}}{{Efn|A third route, South Highway, is modern-day Kinsman Avenue.{{sfn|Hartman|1991|page=19}}}} North Highway was renamed St. Clair Road in 1815 for Arthur St. Clair, first governor (1787-1802) of the Northwest Territory.{{sfn|Rose|1990|page=75}}

The first permanent white settler, Joseph Burke of New York,{{sfn|History of Lorain County, Ohio|1879|page=149}} arrived in the spring or summer of 1798.{{sfn|Johnson|1879|page=452}} The second was David Dille, a New Jerseyan who formerly lived in western Pennsylvania. He arrived in November 1798 and settled on the Buffalo Road {{convert|0.5|mi|km}} southwest of Euclid Creek.{{sfn|Johnson|1879|pages=452-453}} The third permanent settler, William Coleman of Washington County, Pennsylvania, arrived in either 1803 or 1804 and settled at the mouth of Euclid Creek.{{sfn|Johnson|1879|pages=443, 452}} Abraham Bishop arrived in the area in 1809, clearing {{convert|250|acre|km2}} of forest{{sfn|Krejci|2015|page=19}} west of what is now the intersection of White and Richmond Roads.{{sfn|Larick|Gibbons|Siplock|2005|page=20}} Garrett Thorp also settled at the mouth of Euclid Creek in 1810,{{sfn|Johnson|1879|page=454}} followed by Benjamin Thorp{{sfn|Johnson|1879|page=445}} in 1811.{{sfn|Wickham|1914|page=61}}

The Central Highway, or Buffalo Road (also known as the Cleveland-Buffalo Road), became the major route through the area. It led from the Cuyahoga River at what is now Cleveland to the area around Buffalo, New York,{{sfn|Morton|2002|page=14}} and was cleared of trees by white explorers and settlers no later than 1810.{{sfn|Larick|Gibbons|Siplock|2005|page=17}} The trail was cleared of stumps and brush and turned into a dirt road by 1815,{{sfn|Morton|2002|page=14}} and a stagecoach began running once a day between Cleveland and Buffalo.{{sfn|Larick|Gibbons|Siplock|2005|page=19}} The road was renamed Euclid Avenue in 1825 because it connected Cleveland and the emerging settlement of Euclid{{sfn|Morton|2002|page=14}} (now known as the East Cleveland, Ohio, neighborhood of Collamer).{{Efn|It is easy to confuse the names of various locations unless care is taken. The original settlement known as Euclid was founded in 1815. It changed its name to Collamer in 1848, and is now part of the city of East Cleveland, Ohio.{{sfn|Johnson|1879|pages=445-447}} The second settlement known as Euclid (not to be confused with the settlement of Euclid Creek) was incorporated in 1877. Citizens of Euclid rescinded this act in 1879, but Euclid was incorporated again in 1903.{{sfn|Wolf|2008|pages=12, 171}}}}

Passengers on the Buffalo Road often had to have assistance in crossing Euclid Creek and its gorge.{{sfn|Larick|Gibbons|Siplock|2005|page=15}} Wagons could not cross the gorge loaded; they had to be unloaded and cargo carried across the creek and gorge hand. Some wagons had to be partially dismantled to safely cross. The Hermle family established a smithy and wheelwright shop next to the creek to provide these services, and other businesses provided beverages, food, and assistance in moving freight.{{sfn|Larick|Gibbons|Siplock|2005|page=24}} An inn, Euclid House, was built at the crossing by Abraham Farr in 1815.{{sfn|Larick|Gibbons|Siplock|2005|page=19}}{{Efn|It was sold to and rebuilt by C.E. Fenner in the 1840s.{{sfn|Larick|Gibbons|Siplock|2005|page=19}}}}

In 1810,{{sfn|Krejci|2015|page=19}} Abraham Bishop built a sawmill on his land on the east branch of Euclid Creek.{{sfn|Johnson|1879|page=454}}

The War of 1812 marks the end of the initial period of white settlement in Ohio.{{sfn|South Euclid-Lyndhurst Historical Society|2011|page=9}} During the war, American soldiers on horseback were stationed at the mouth of Euclid Creek to provide warning to other settlements in the area in case British ships should stop or pass by.{{sfn|Johnson|1879|page=455}} On June 19, 1813, a British naval force under Acting Commander Robert Heriot Barclay{{sfn|Hattendorf|2011|page=107}} anchored off Euclid Creek to wait out a storm. Sailors came ashore and killed a farmer's ox for food, apologizing for the theft.{{sfn|Johnson|1879|pages=61-62}}{{Efn|In their written apology, the sailors said they would have left the valuable hide intact for the farmer to use, but were in too much of a rush to properly butcher the animal.{{sfn|Johnson|1879|pages=61-62}}}}

A small hamlet named Euclid Creek (hereinafter the Village of Euclid Creek) formed after the War of 1812 at the intersection of what is now Euclid Avenue and Highland Road, adjacent to Euclid Creek. Memories of the recent war led the citizens of the Village of Euclid Creek to erect a blockhouse as part of their settlement.{{sfn|Johnson|1879|page=455}} About 1816, Abraham Farr opened a tavern in a log cabin in the hamlet.{{sfn|Johnson|1879|page=455}} A Methodist church was erected in the village in 1821,{{sfn|Orth|1910a|page=356}} and a Baptist church from 1821 to 1822.{{sfn|Johnson|1879|page=458}} By 1840, the Village of Euclid Creek had three stores,{{sfn|Johnson|1879|page=456}} and the Dille family added a dry goods store and post office in 1849.{{sfn|Larick|Gibbons|Siplock|2005|page=23}}

A number of other important businesses opened elsewhere on Euclid Creek in the early 1800s. About 1815, Paul Condit opened a tavern in a frame house near the confluence of Claribel Creek and the east branch.{{sfn|Johnson|1879|page=455}} In 1817 or 1818, William Coleman built a gristmill near the mouth of Euclid Creek, and later a sawmill.{{sfn|Johnson|1879|page=455}} Coleman's neighbor, William Gray, erected a stoneware manufactory at the mouth of Euclid Creek about 1820. It swiftly grew to seven or eight kilns. Gray sold the works to J. & L. Marsilliott in 1823, who kept it open another 15 years.{{sfn|Johnson|1879|page=455}}

Toward the end of the 1810s, the Welch family moved from Connecticut and purchased the Euclid Creek gorge north of Monticello Blvd. This area became known as Welch's Woods,{{sfn|Larick|Gibbons|Siplock|2005|page=64}} and remains as part of the Euclid Creek Reservation today (as "Welsh Woods").

The national American economy underwent a boom in 1836 and 1837. A large number of people settled in Euclid Township, establishing hundreds of new farms and businesses. A city was surveyed at mouth of Euclid Creek in 1837, but no action was ever taken to build it.{{sfn|Orth|1910a|page=626}} In 1840, James Hendershot and Harvey Hussong each opened a stone quarry on Euclid Creek in what is now the Euclid Creek Reservation. Madison Sherman, who opened his quarry on the stream near them at the same time, also built a mill for cutting stone into slabs.{{sfn|Johnson|1879|page=456}} About 1840 (or just before), Ruel House, Charles Moses, and Captain William Trist opened a shipyard on the east side of the mouth of Euclid Creek where they constructed canal boats. The shipyard moved to the west side of the stream's mouth in 1845, and shifted production to the construction of schooners. The shipyard closed in 1850.{{sfn|Johnson|1879|page=456}}

File:Euclid Creek bridge and station - Cleveland Painesville and Ashtabula RR.jpg

One of the most important infrastructure changes to affect Euclid Creek came in early 1851 when the Cleveland, Painesville and Ashtabula Railroad (CP&A) constructed a bridge over the creek at St. Clair Avenue. Construction on the CP&A began in January 1851,{{cite news|title=Ohio|work=American Railroad Journal|date=November 29, 1851|page=757|access-date=January 29, 2018|url=https://books.google.com/books?id=LVEjAQAAMAAJ&q=%22Cleveland%2C+Painesville%2C+and+Ashtabula%22+construction&pg=PA757}} and by the end of the month grading had reached Willoughby.{{cite news|title=Cleveland, Painesville and Ashtabula R. R.|work=The Plain Dealer|date=February 1, 1851|page=3}} The masonry arch bridge had a single {{convert|50|ft|m|adj=on}} span and extensive abutments. At {{convert|40|ft|m}} in width, the bridge was wide enough to also permit wagon traffic in addition to trains. The railroad also built a water and fuel stop, known as Euclid Depot, next to Euclid Creek at St. Clair Avenue.{{sfn|Larick|Gibbons|Siplock|2005|page=25}}

The railroad induced east-west road traffic to shift from Euclid Avenue to St. Clair Avenue, and the population center shifted with it.{{sfn|Larick|Gibbons|Siplock|2005|page=25}} The area around Euclid Depot grew so swiftly that in 1860, the Roman Catholic Diocese of Cleveland established a parish on the east bank of Euclid Creek halfway between the Village of Euclid Creek and Euclid Depot. This was the first diocesan parish outside the city of Cleveland.{{sfn|Larick|Gibbons|Siplock|2005|page=37}} By 1865, Euclid Depot had grown into a large village. The railroad named the village Nottingham, after CP&A general superintendent Henry Nottingham.{{sfn|Larick|Gibbons|Siplock|2005|page=25}}{{cite news|title=Personal|work=The Railroad Gazette|date=March 11, 1892|page=197|access-date=April 24, 2018|url=https://books.google.com/books?id=Z5wxAQAAMAAJ&q=%22Henry+Nottingham%22+railroad+superintendent+died&pg=PA197}} Although the Village of Euclid Creek continued to grow until the late 1870s, the village of Nottingham grew much more swiftly.{{sfn|Johnson|1879|page=457}}

Euclid Cemetery opened in 1864 just above the Euclid Creek floodplain south of the intersection of Euclid Avenue and Highland Road. The cemetery was created as a means of consolidating more than 80 small burial grounds, and by the time it closed had more than 4,000 graves.{{sfn|Larick|Gibbons|Siplock|2005|page=42}}

In 1863 or 1864,{{sfn|Treat|1893|pages=85, 114}} attorney George Gilbert opened Camp Gilbert on the site of the former shipyard on the west bank of the mouth of Euclid Creek. Camp Gilbert was the Cleveland area's first resort. Catering to wealthy Clevelanders, the camp featured a three-story Second Empire brick headquarters, a clubhouse, creekside fishing pavilion, and campgrounds. Gilbert sold the camp in 1874 to the Ursulines of the Roman Union, a religious institute of women (nuns) engaged in education.{{sfn|Larick|Gibbons|Siplock|2005|page=28}} The Ursulines established Villa Angela, a boarding school for girls, at the former Camp Gilbert in 1878. A boarding school for boys, St. Joseph Seminary, opened at the site in 1886.{{sfn|Larick|Gibbons|Siplock|2005|page=32}}

Viticulture and winemaking on a small scale appeared in the Euclid Creek floodplain below the Appalachian Plateau after the Civil War,{{cite news|title=Lyndhurst Born of 2 Townships|work=The Plain Dealer|date=October 2, 1926|page=11}} with vineyards appearing first in the alluvial floodplain in the Euclid Creek gorge in what is now the Euclid Creek Reservation.{{sfn|Wood|1901|page=24}} One of the first large grape-growing operations was founded in 1864 by German immigrant Louis F. Harms on {{convert|40|acre|km2}} in the area now bounded by Euclid Avenue, Chardon Road, and Dansy Drive.{{sfn|Larick|Gibbons|Siplock|2005|page=29}} John J. and Mary Schuster founded the area's second large vineyard in 1870, southwest of the Harms vineyard across Chardon Road.{{sfn|Larick|Gibbons|Siplock|2005|page=29}}{{Efn|The grape industry in Ohio collapsed in the early 1900s with the arrival of Fidia viticida, the grape rootworm.}} Additional quarries opened in the Euclid Creek gorge after the American Civil War. Duncan McFarland opened a quarry in 1867{{sfn|Johnson|1879|page=457}} near where Monticello Blvd. crosses Euclid Creek today. This was the first large-scale commercial stone quarry to open on Cleveland's east side.{{sfn|Larick|Gibbons|Siplock|2005|page=30}} His sons, James and Thomas, purchased land opposite his quarry on the west side of Euclid Creek in 1871.{{sfn|Larick|Gibbons|Siplock|2005|page=30}}{{sfn|Johnson|1879|page=457}} John Holland and William H. Stewart founded the Forest City Stone Company{{sfn|Orth|1910b|page=107}} in 1871{{sfn|Hannibal|Scherzer|Saja|2007|page=73}} and established a third quarry in the Euclid Creek gorge.{{sfn|Orth|1910b|page=107}} Both McFarland quarries were acquired by Forest City Stone in 1875,{{sfn|Larick|Gibbons|Siplock|2005|page=30}} after which the company opened a fourth quarry on the east side of the creek.{{sfn|Johnson|1879|page=457}} These quarries remained in operation until 1915.{{sfn|Larick|Gibbons|Siplock|2005|page=30}}

File:Chestnut Hills.jpg

In October 1882, the New York, Chicago and St. Louis Railroad opened.{{sfn|Springirth|2010|page=63}} This railroad, which largely ran parallel to and south of the Lake Shore and Michigan Southern Railway (the former Cleveland, Painesville & Ashtabula),{{sfn|White|1954|page=14}} passed through the Village of Euclid Creek, making it an important stopping point again. The railway, whose nickname was the "Nickel Plate",{{sfn|Springirth|2010|page=63}} built a Howe truss bridge over Euclid Creek.{{sfn|Ohio Commissioner of Railroads and Telegraphs|1884|page=136}}

In 1895, the city of Cleveland and Cuyahoga County began converting Euclid Avenue from a plank road into a modern paved street. The road was widened to {{convert|100|ft|m}} and paved from downtown Cleveland to Village of Euclid Creek.{{cite news|title=Plans for Boulevards|work=Paving and Municipal Engineering|date=July 1895|page=39|hdl=2027/mdp.39015075043235?urlappend=%3Bseq=49|access-date=April 26, 2018|url=https://hdl.handle.net/2027/mdp.39015075043235?urlappend=%3Bseq=49}} The project reached Collamer in 1902, and work on the final segment to the Village of Euclid Creek began in the summer of that year.{{cite news|title=Paving and Roadmaking|work=The Engineering Record|date=July 12, 1902|page=44|access-date=April 26, 2018|url=https://books.google.com/books?id=tcFlDMVwbbgC&q=streetcar+bridge+%22Euclid+Creek%22&pg=PA44|last1=Mehren|first1=Edward J.|last2=Meyer|first2=Henry Coddington|last3=Goodell|first3=John M.}} The work was finished in 1902, when a new masonry arch bridge was constructed to carry Euclid Avenue over Euclid Creek.

{{cite news|title=Bridge Building|work=The Railroad Gazette|date=April 10, 1903|page=273|access-date=April 26, 2018|url=https://books.google.com/books?id=wKMxAQAAMAAJ&q=railroad+%22Euclid+Creek%22+bridge+masonry&pg=PA273}}

Swedish immigrants constructed a Lutheran church on the banks of Euclid Creek south of Anderson Road at Green Road in 1898.{{sfn|Larick|Gibbons|Siplock|2005|page=31}}

Henry Pickands, a partner in Pickands Mather and wealthy heir of Samuel Mather,{{cite news|title=Henry S. Pickands Dies in His Office|work=The New York Times|date=August 11, 1929|page=27}} purchased in 1902 {{convert|25|acre|km2}} of land atop Chardon Hill (an area now bounded by Chardon Road, the Euclid Creek Reservation, and E. 221st Street). In 1903,{{cite news|title=Selected Miscellany and Editorial Comment|work=The Brickbuilder|date=March 1904|page=78 (plate 22)|access-date=May 10, 2018|url=https://books.google.com/books?id=pFxNAQAAMAAJ&q=%22House%20for%20H.S.%20Pickands%22&pg=PA45}} work was finished on a "Flemish baronial" brick mansion which he named Chestnut Hills.{{sfn|Larick|Gibbons|Siplock|2005|page=41}} His widow had Chestnut Hills demolished in 1938, and a Neo-Georgian style home erected on the site.{{sfn|Larick|Gibbons|Siplock|2005|page=49}}

File:Old Lake Shore Blvd bridge - 1909.jpg

In 1907, a $10,000 (${{formatnum:{{Inflation|US|10000|1908|r=-5}}}} in {{Inflation-year|US}} dollars) masonry bridge was constructed to carry Lakeshore Blvd. over Euclid Creek.{{cite news|title=Cleveland and Northern Ohio|work=Rock Products|date=June 20, 1907|page=27|access-date=April 28, 2018|url=https://books.google.com/books?id=uB5KAQAAMAAJ&q=%22Euclid+Creek%22+bridge+built&pg=RA11-PA27}} This was followed in 1908 by a $15,000 (${{formatnum:{{Inflation|US|15000|1908|r=-5}}}} in {{Inflation-year|US}} dollars) concrete bridge to carry St. Clair Avenue over Euclid Creek. This bridge was a large one, {{convert|80|ft|m}} long and {{convert|52|ft|m}} wide, with a {{convert|45|ft|m|adj=on}} high arch.{{cite news|title=Cleveland and Northern Ohio|work=Rock Products|date=February 5, 1908|page=76|access-date=April 28, 2018|url=https://books.google.com/books?id=uB5KAQAAMAAJ&q=%22Euclid+Creek%22+bridge+built&pg=RA6-PA9|postscript=none}}; {{cite news|title=Cleveland and Northern Ohio|work=Rock Products|date=April 5, 1908|page=49|access-date=April 28, 2018|url=https://books.google.com/books?id=uB5KAQAAMAAJ&q=%22Euclid+Creek%22+bridge+built&pg=RA1-PA3}}

The first major development south of the Euclid Creek gorge occurred in 1909. That year, a significant number of members of the Euclid Club in Cleveland Heights quit and founded the Mayfield Country Club in Lyndhurst.{{sfn|Hopkins|2004|page=18}} In July, they purchased an initial {{convert|88|acre|km2}} of land about {{convert|0.24|mi|km}} northwest of the intersection of Cedar and Richmond Roads.{{cite news|title=Club Buys Land for Golf Course|work=The Plain Dealer|date=July 31, 1909|page=5}} Within a year, the club owned {{convert|226|acre|km2}}, and had dammed Euclid Creek (which ran north through the club grounds) to provide water for the club's planned 18-hole golf course.{{cite news|title=There'll Be A Difficult Golf Course In Cleveland When New Club Is Opened|work=The Plain Dealer|date=June 5, 1910|page=D12}} The club, reduced to {{convert|216|acre|km2}}, opened in July 1911.{{cite news|title=Mayfield Heights Club and Scenes On Golf Links|work=The Plain Dealer|date=May 14, 1911|page=C16|postscript=none}}; {{cite news|title=New Club Opens Doors To Guests|work=The Plain Dealer|date=July 16, 1910|page=B1}}

A Neoclassical house of worship was erected by Nottingham Congregational Church on the west bank of Euclid Creek near Waterloo and Nottingham Roads in 1910.{{sfn|Larick|Gibbons|Siplock|2005|page=38}}{{Efn|This structure was demolished in 1961 to make way for the construction of Interstate 90.{{sfn|Larick|Gibbons|Siplock|2005|page=38}}}}

The first of three bridges carrying Highland Road over Euclid Creek was constructed at the north end of the Euclid Creek gorge in 1912.{{cite news|title=Construction News|work=The Engineering News|date=May 23, 1912|page=316|access-date=April 28, 2018|url=https://books.google.com/books?id=xzFKAQAAMAAJ&q=%22Euclid+Creek%22+bridge+built&pg=RA1-PA316}} Cuyahoga County wanted to push Highland Road southwest through the Euclid Creek Reservation, but the onset of World War I delayed the start of construction until 1920.{{cite news|title=County Road Work|work=The Plain Dealer|date=October 17, 1920|page=A18}} A bridge over the east branch of Euclid Creek was built about 1922.{{cite news|title=Notice to Contractors—Highland Road No. 2|work=The Plain Dealer|date=July 6, 1922|page=24}} Most of the remaining construction occurred in 1924,{{cite news|title=Spring to Bring $1,000,000 Paving|work=The Plain Dealer|date=February 24, 1924|page=A15|postscript=none}}; {{cite news|title=Minor Roads Get 96 of 103 Miles Paved in 4 Years|work=The Plain Dealer|date=September 26, 1922|pages=1, 5}} although it was not until 1928 that the final portion of Highland Road (connecting it to Euclid Avenue) was paved.{{cite news|title=10 Miles More of Roads Promised|work=The Plain Dealer|date=August 19, 1928|page=A2}} Three Highland Road bridges remained to be constructed. Automobiles used fords to cross the creek at these points.{{sfn|Matowitz|2006|pages=22, 24}}

The Village of Euclid constructed Central High School at 20701 Euclid Avenue on the east bank of Euclid Creek in 1913. It was downgraded to a junior high school in 1949, demolished in 1967, and rebuilt as Central Middle School.{{sfn|Larick|Gibbons|Siplock|2005|page=42}}

Although settlement and development had largely been contained to Euclid Creek below the Appalachian Plain, a few important changes were beginning to happen to the creek's headwaters. In 1913, Cleveland attorney Charles K. Arter constructed Arter House on the east bank of the main branch of Euclid Creek on what is now Curbside Road in Lyndhurst.{{sfn|Larick|Gibbons|Siplock|2005|page=43}} The 22-room, Late Georgian mansion sat on an elaborately landscaped {{convert|65|acre|km2|adj=on}} estate. The Arter children, Calvin and Charles Jr., donated the estate to the Sisters of Notre Dame de Namur in 1957, who converted it into the Julie Billiart School (a school for children with learning disabilities).{{cite news|last=McCarthy|first=Sara|title=Sisters Ready Arter Gift Estate for School|work=The Plain Dealer|date=January 24, 1958|page=7}} Chester C. Bolton and his wife, Frances, established the Franchester Place estate in 1916{{sfn|Treer|2010|page=93}} on {{convert|110|acre|km2}} of land{{cite news|last=Dorn|first=Sara|title=From Blossom Mansion to Shopping Mall: A Legacy Village Timeline|work=The Plain Dealer|date=July 13, 2015|access-date=April 26, 2018|url=http://www.cleveland.com/lyndhurst-south-euclid/index.ssf/2015/05/from_blossom_mansion_to_shoppi.html}} on the northwest corner of Cedar and Richmond Roads.{{cite news|last=Treer|first=Thom|title=A Lyndhurst Legacy: Chester C. and Frances Payne Bolton|work=Lyndhurst Life|date=April 2017|access-date=April 30, 2018|url=http://www.lyndhurst-oh.com/documents/lyndhurst-life-magazine-april-2017.pdf}} In 1922, the Hawken Boys' School constructed a new school on the east bank of the main branch of Euclid Creek adjacent to the Julie Billiart School.{{sfn|Treer|2010|page=94}} These {{convert|14|acre|km2}} were donated by the Boltons,{{sfn|Treer|2010|page=94}} and a portion of them turned into athletic fields.{{cite news|title=The Hawken School|work=The Plain Dealer|date=September 10, 1922|page=62}}

The Cleveland Metropolitan Park District (now Cleveland Metroparks) was created by state legislation in 1917. The following year, the park board proposed purchasing the main branch of Euclid Creek and its associated valley from Lake Erie south to Shaker Heights.{{sfn|Board of Park Commissioners|1918|pages=35-37}} Although this plan ultimately proved unfeasible, the first {{convert|31|acre|km2}} of land (consisting of most of the old Harms vineyard) was purchased in October 1920.{{cite news|title=Park Board Buys On Chardon Road|work=The Plain Dealer|date=October 8, 1920|page=28}}{{Efn|Cuyahoga County sought in 1921 to buy an additional {{convert|1500|acre|km2}} of land bounded by Chardon, Highland, and Richmond Roads for a game preserve. This would have placed almost all of the east branch of Euclid Creek in a protected area.{{cite news|title=County To Have Game Preserve Tract of 1,500 Acres Close to Euclid Village|work=The Plain Dealer|date=July 17, 1921|page=B4}} The purchase never occurred.}} By the summer of 1926, the park board had obtained title to more than a mile of Euclid Creek south of Euclid Avenue,{{cite news|title=Growth Seen in Euclid Village|work=The Plain Dealer|date=June 27, 1926|page=12}} and in the fall of that year finally secured {{convert|19|acre|km2}} at the northern mouth of the gorge.{{cite news|title=$28,500 Award for Park Tract|work=The Plain Dealer|date=June 26, 1924|page=21|postscript=none}}; {{cite news|title=Jackson Sells to Park|work=The Plain Dealer|date=September 26, 1926|page=15}} A final {{convert|40|acre|km2}} were obtained at the south end of the gorge in May 1930, giving the Cleveland Metroparks control over what is now the Euclid Creek Reservation.{{cite news|title=Profit Or Loss|work=The Plain Dealer|date=May 17, 1930|page=13}}

Cleveland Metroparks made almost no improvements to the Euclid Creek gorge while it was assembling the land for the Euclid Creek Reservation.{{cite web|last=Raponi|first=Richard|title=Civilian Conservation Corps: The Dedication of Euclid Creek Reservation|website=Cleveland Historical|date=April 18, 2017|access-date=April 28, 2018|url=https://clevelandhistorical.org/items/show/690?tour=52&index=14}} On November 21, 1933, the federal government approved the establishment of a Civilian Conservation Corps (CCC) camp in the Euclid Creek Reservation. A barracks was erected at the intersection of Euclid Avenue and Highland Road, and over the next three years the CCC workers cleared land, planted trees, and built picnic areas, trails, and parking lots.{{sfn|Matowitz|2006|page=20}} Most importantly, they constructed three bridges for Highland Road (eliminating the last fords on that street) and built what is now Metro Park Drive (also known as Euclid Park Road and Metropolitan Park Blvd.){{sfn|Matowitz|2006|pages=23, 27}} Workers also armored and channelized the creek downstream of Villaview Road by lining the banks with stone blocks.{{cite news|last=Elting|first=Jennifer|title=Sewer District's Euclid Creek Shoaling Removal Project Underway|work=Collinwood Observer|date=December 8, 2017|access-date=April 30, 2018|url=http://www.collinwoodobserver.com/read/2017/12/08/sewer-districts-euclid-creek-shoaling-removal-project-underway}} Euclid Creek Reservation was formally dedicated and opened on June 24, 1936—the first public opening of any unit in the Cleveland Metroparks system. The CCC camp became veterans' housing in 1942, and was demolished in 1944.

Other open spaces on Euclid Creek were being developed, however. The Harms family sold the remaining {{convert|26.5|acre|km2}} of their vineyard to the Sisters of the Good Shepherd in June 1920.{{cite news|last=Robertson|first=William|title=Sisterhood Buys Site For Convent|work=The Plain Dealer|date=June 16, 1920|page=22}} The nuns erected Our Lady of Lourdes Shrine at the site, which was dedicated on May 30, 1926.{{cite news|title=Dedicate Grotto Today|work=The Plain Dealer|date=May 30, 1926|page=A6|postscript=none}}; {{cite news|last=Chojnacki|first=Linda|title=Our Lady of Lourdes Shrine in Euclid holds a piece of history|work=The Plain Dealer|date=December 19, 2010|access-date=April 27, 2018|url=http://www.cleveland.com/our-town/index.ssf/2010/12/our_lady_of_lourdes_shrine_in_euclid_holds_a_piece_of_history.html}} In 1921, Dudley S. Blossom, Director of Public Health and Welfare for Cuyahoga County, and his wife, Elizabeth (Frances Payne Bolton's sister), purchased a {{convert|22|acre|km2|adj=on}} estate just south of the Bolton's Franchester Place.{{cite news|last=Dorn|first=Sara|title=From Blossom estate to shopping mecca: How Legacy Village came to be|work=The Plain Dealer|date=May 11, 2015|access-date=April 30, 2018|url=http://www.cleveland.com/lyndhurst-south-euclid/index.ssf/2015/05/from_blossom_estate_to_shoppin.html}} Over the next year, the couple built a Tudor Revival home on the estate. Between 1922 and 1927, the Blossoms added a service compound that consisted of two small homes for estate workers, a garage, and a stable for horses.{{sfn|Stern|2005|page=4}} Elizabeth Blossom was an avid cultivator of flowers, and established a wild garden in the small ravine through which Euclid Creek flowed on the Blossom estate.{{sfn|Stern|2005|page=5}} After Dudley Blossom's death in 1938, Elizabeth had the main house torn down and a Neo-Georgian style home erected in its place.

Another development which impacted the headwaters of Euclid Creek opened in 1923. This was the Acacia Country Club, located on the northeast corner of Cedar and Richmond Roads. Founded in 1921, a temporary clubhouse and the first nine holes of the {{convert|302|acre|m2|adj=on}} club opened in May 1923.{{cite news|title=Charter Is Granted To Acacia Golf Club|work=The Plain Dealer|date=April 6, 1921|page=12}}{{cite news|title=Men Must Learn More About Play|work=The Plain Dealer|date=March 28, 1922|page=19}}{{cite news|title=Progress Made On Golf Course|work=The Plain Dealer|date=November 4, 1922|page=18}}{{cite news|title=To Be Ready on Decoration Day|work=The Plain Dealer|date=May 6, 1923|page=D4|postscript=none}}; {{cite news|title=Club Officers Officially Open Acacia Course|work=The Plain Dealer|date=May 31, 1923|page=22|postscript=none}}; {{cite news|title=Introducing the Acacia Club and Some of Its Members to the Cleveland Colony|work=The Plain Dealer|date=June 3, 1923|page=D3}}{{Efn|One early press report claimed the club owned {{convert|350|acre|m2}}. Another early news story said the club only owned {{convert|117|acre|m2}}, and added {{convert|45|acre|m2}} in 1922.{{cite news|title=Important Piece For Depot Bought|work=The Plain Dealer|date=September 7, 1922|page=5}} But most sources say the club had {{convert|302|acre}}.}} Press reports say that the owners laid {{convert|16|mi|km}} of tile drain to channel water into Euclid Creek. The final nine holes opened in July 1924,{{cite news|last=McDavitt|first=Harry G.|title=New Acacia Country Club Shoots Past Own Goal In Its Golf Endeavors|work=The Plain Dealer|date=April 20, 1924|page=D2}}{{Efn|A 36-hole course was apparently intended{{cite news|title=Another Golf School Starts|work=The Plain Dealer|date=January 7, 1922|page=14}} but never built.}} and the permanent clubhouse in May 1925.{{cite news|title=Acacia Country Club House Will Be Ready By May 30|work=The Plain Dealer|date=November 23, 1924|page=B5}}

Rapid development atop the Appalachian Plateau began to affect both the main and east branches of Euclid Creek after 1920.

In 1928, the Curtiss-Wright corporation purchased {{convert|271|acre|km2}} of land east of Richmond Road from the Richmond Estates Land Company. The company opened a dirt-runway airport there, and named it Herrick Field after Myron T. Herrick.{{Efn|Herrick served as Governor of Ohio from 1904 to 1906, and was U.S. Ambassador to France from 1914 to 1919 and again from 1921 to 1929. He was ambassador when Charles Lindbergh landed in Paris after making his famous solo flight across the Atlantic Ocean in 1927.}} A hangar was erected in 1929, but area residents won a federal injunction declaring the airfield a noise nuisance and public danger.{{cite news|title=Landmark airport celebrates 50 years|work=The News-Herald|date=May 31, 2000|access-date=April 29, 2018|url=http://www.news-herald.com/article/HR/20000531/NEWS/305319979|postscript=none}}; {{cite news|last=Tracy|first=Charles|title=The Airport That Arose From the Dead|work=Flying|date=March 1963|pages=26–27, 86–88|access-date=April 29, 2018|url=https://books.google.com/books?id=tQBQQRcAYCQC&q=%22Curtiss+Wright%22+airfield+cleveland&pg=PA36}} It closed on August 1, 1930.{{cite news|title=In the Air Over Cleveland|work=The Plain Dealer|date=September 7, 1930|page=Women's Magazine and Amusement 16}} Cuyahoga County purchased the sod airfield in 1946 for $200,000 (${{formatnum:{{Inflation|US|200000|1946|r=-5}}}} in {{Inflation-year|US}} dollars) and it reopened on May 30, 1950.{{cite news|title=Richmond Airport Has Busy Opening|work=The Plain Dealer|date=May 31, 1950|page=12}} The airport expanded to {{convert|470|acre|km2}} by 1963,{{cite news|last=Williams|first=Brian|title=County Airport Looking Up|work=The Plain Dealer|date=August 4, 1963|page=AA1}} {{convert|585|acre|km2}} by 1970,{{cite news|title=Business Soaring at County Airport|work=The Plain Dealer|date=September 23, 1979|page=The Growing Hillcrest Community 9}} {{convert|625|acre|km2}} by 1981,{{cite news|last=Moore|first=Gregory L.|title=1,400 Jobs Seen In Development of Airport Land|work=The Plain Dealer|date=March 14, 1981|page=A12}} and {{convert|640|acre|km2}} by 1999{{cite news|last1=Sweeney|first1=James F.|last2=Achkar|first2=Alan|title=A Neighborly Approach: Planners Say Nearby Airports Can Take Load Off Hopkins|work=The Plain Dealer|date=November 2, 1999|page=A1}}—encompassing several tributaries of the east branch.

The 1902 masonry bridge over Euclid Creek was rebuilt in 1932.{{cite news|title=County Fixing 67 Spans|work=The Plain Dealer|date=September 16, 1991|page=B1}}

A portion of Claribel Creek, a tributary of Euclid Creek, was channelized in 1933 when Ohio Villa, a {{convert|100|acre|km2|adj=on}} country club opened northeast of the corner of Richmond and Highland Roads. The club's owner, the Italian-American Brotherhood Club, was forced to close the facility in 1942 after its major investors were found to be bank robbers with connections to the Cleveland crime family. It reopened as the Richmond Country Club in 1942,{{sfn|Larick|Gibbons|Siplock|2005|page=53}} and Mayfair Dam erected the same year to create Mayfair Lake.{{sfn|U.S. Environmental Protection Agency|1988|page=4-17}} After the clubhouse burned in 1953,{{sfn|Larick|Gibbons|Siplock|2005|page=53}} the site was taken over by the Mayfair Tennis and Swim Club (a Jewish health club).

In 1942, the Sisters of St. Joseph of St. Mark purchased the {{convert|30.5|acre|km2|adj=on}} Pickands estate. The 1938 Pickands mansion was converted into the Mount St. Joseph Nursing Home.{{cite news|title=Pickands Estate Bought By Religious Order|work=The Plain Dealer|date=November 1, 1942|page=C8}}

The city of Cleveland began construction on the Nottingham Intake and Filtration Plant on Euclid Creek in July 1947.{{cite news|last=Dorsey|first=Ray|title=Report Hits Cleveland's Fire Safety|work=The Plain Dealer|date=July 1, 1947|pages=1, 2}} The project, designed to provide the city's fast-growing east side with fresh water from Lake Erie rather than from Euclid Creek, other streams, and groundwater wells, was first proposed in 1925 and set for completion in 1930.{{cite news|title=A Triple Defense|work=The Plain Dealer|date=May 1, 1925|page=8}} In 1930, the city condemned {{convert|80|acre|km2}} of land on the east bank of Euclid Creek between the Nickel Plate tracks and St. Clair Avenue.{{cite news|title=City Council Is Facing Day of Reckoning|work=The Plain Dealer|date=March 24, 1930|pages=1, 5}} Construction was delayed by the onset of the Great Depression,{{cite news|last=Dorsey|first=Ray|title=Time-Out...|work=The Plain Dealer|date=June 11, 1948|page=34}} and the plant finally opened in the early fall of 1951.{{cite news|title=Water Intake Is Near Completion|work=The Plain Dealer|date=August 4, 1951|page=4|postscript=none}}; {{cite news|title=Nottingham Water Plant Is On View|work=The Plain Dealer|date=October 20, 1951|page=4}}

While the water filtration plant was under construction, the Cuyahoga County Airport opened in May 1950.

In 1954, Cuyahoga County and the city of South Euclid approved the construction of a bridge over Euclid Creek to link Monticello Blvd. and Wilson Mills Road.{{cite news|title=O.K. $1,088,396 Bridge|work=The Plain Dealer|date=June 29, 1954|page=9}} Officials had spent several years debating whether to build a low-level bridge or a high-level span. The high-level span was finally approved, and the $1.2 million (${{formatnum:{{Inflation|US|1200000|1955|r=-5}}}} in {{Inflation-year|US}} dollars) structure spanning the {{convert|400|ft|m|adj=on}} wide ravine opened in December 1955.{{sfn|Larick|Gibbons|Siplock|2005|page=56}}{{cite news|title=New Monticello Bridge Is Opened|work=The Plain Dealer|date=December 5, 1955|page=10}}

Construction of Interstate 271 began in November 1960.{{cite news|title='Snowbreaking' Begins Route 1 Here|work=The Plain Dealer|date=December 29, 1960|page=5}} The first segment, from Willoughby Hills to Wilson Mills Road, was under construction by April 1961, with construction on the segment from Wilson Mills Road to Fairmount Blvd. set to begin in the fall of 1961 and the segment from Fairmount Blvd. to Harvard Road for late 1961.{{cite news|title=Beachwood Clears Way for Outer Belt|work=The Plain Dealer|date=April 7, 1961|page=1}} The entire route (now extending as far south as Chagrin Blvd.) opened in November 1962. The freeway crossed two tributaries of the east branch (one of them twice),{{cite news|last=Kuehner|first=John C.|title=Growth Blamed for Runoff Flooding in Willoughby Hills|work=The Plain Dealer|date=December 3, 1994|page=B1}} and these waters were rechanneled into a man-made ditch by the freeway's construction.{{sfn|Euclid Creek Watershed Council|2006|page=55}} The completion of Interstate 271 spurred a development boom on the east side of Cuyahoga County, greatly affecting Euclid Creek's headwaters.{{sfn|Larick|Gibbons|Siplock|2005|page=57}}

Construction of Interstate 90 and the Lakeland Freeway through the city of Euclid began in the spring of 1961.{{cite news|last=Robson|first=John|title=Euclid Mayor's Dream Road Is Nightmare Alley for Now|work=The Plain Dealer|date=March 11, 1961|page=13}} Euclid Creek was straightened, cutting off a strong meander bounded by Neff Road, Villaview Road, Nottingham Road, and the old Lake Shore railroad tracks. The meander was filled in and a cloverleaf interchange built on the site.{{sfn|Larick|Gibbons|Siplock|2005|page=56}} Beneath the freeway, Euclid Creek was culverted{{cite news|title=East Side Faces 2-Month Detour|work=The Plain Dealer|date=February 17, 1961|page=74}} and a {{convert|900|ft|m|adj=on}} long concrete channel constructed to replace the natural streambed. Work on the Lakeland Freeway in Euclid was finished in November 1962.{{cite news|title=2 Freeways Nearly Set; Police Aren't|work=The Plain Dealer|date=October 11, 1962|page=8}}{{cite news|last=Hirschfeld|first=Wilson|title=Freeway Link to Be Opened this Morning|work=The Plain Dealer|date=November 2, 1962|page=7}} Construction of the culvert proved to be a turning point in how communities treated water in Cuyahoga County. Previously, streambeds were bridged. Afterward, streams were routinely buried in tunnels or culverted.{{sfn|Larick|Gibbons|Siplock|2005|page=58}}

The headwaters of Redstone Run, one of the east branch's major tributaries, were affected by construction in 1962. That year, the Glazer-Marotta Companies won zoning approval to construct a shopping mall (now Richmond Town Square) on the northeast corner of the intersection of Richmond Road and Monticello Blvd. The company agreed to spend as much as 2 percent of the mall's cost in culvertizing, pumping, and rerouting the headwaters of Redstone Run.{{cite news|title=Richmond Hts. Project Approved|work=The Plain Dealer|date=May 2, 1962|page=35}} Initially, the $8 million (${{formatnum:{{Inflation|US|8000000|1962|r=-5}}}} in {{Inflation-year|US}} dollars) project was intended to cover just {{convert|45|acre|km2}} of land in the watershed,{{cite news|last=Rider|first=Adin C.|title=$10-Million Shop, Apartment Group Set in Richmond|work=The Plain Dealer|date=August 7, 1962|pages=1, 14}} but the project was expanded until it cost $42 million (${{formatnum:{{Inflation|US|42000000|1964|r=-5}}}} in {{Inflation-year|US}} dollars) and covered {{convert|105|acre|km2}}.{{cite news|last=Gleisser|first=Marcus|title=75-Store Enclosed Mall Set|work=The Plain Dealer|date=February 19, 1964|pages=1, 8}} The Richmond Mall opened in September 1966.{{cite news|title=Richmond Mall Shopping Center Opens Today at 9:30|work=The Plain Dealer|date=September 22, 1966|page=34|postscript=none}}; {{cite news|last=Gorisek|first=Albin A.|title=150,000 Swamp Richmond Mall|work=The Plain Dealer|date=September 23, 1966|page=34}} A year after the mall project was announced, construction began on St. Gregory of Narek Armenian Church across the street at 678 Richmond Road.{{cite news|title=Ohio's Only Armenian Church|work=The Plain Dealer|date=February 20, 1965|page=11}} It opened in April 1964,{{cite news|title=Church Consecrated|work=The Plain Dealer|date=April 13, 1964|page=19}} further impeding the headwaters of Redstone Run.

In 1966, a new development in Beachwood impacted the headwaters of the main branch of Euclid Creek. That year, the Jewish Orthodox Home for the Aged moved from Lakeview Road in Cleveland's Glenville neighborhood to a large new site at 27100 Cedar Road in Beachwood. The organization, now called Menorah Park Jewish Home for the Aged, constructed a one-story nursing home.{{cite news|title=Jewish Unit Tops $4.7-Million Goal In Nursing Home Drive|work=The Plain Dealer|date=January 14, 1966|page=10|postscript=none}}; {{cite news|title=New Corporation Buys Jewish Orthodox Home|work=The Plain Dealer|date=February 9, 1968|page=20}} Over the next half century, Menorah Park constructed an extensive senior living campus. The R.H. Myers Apartments, finished in 1978, contained 207 units in a four-story tower, 10-story tower, and one-story communal area.{{cite news|title=Models Aim at Older Adults|work=The Plain Dealer|date=February 19, 1978|pages=7–10}} Stone Gardens, an assisted living facility, opened in 1994,{{cite news|last=Lane|first=Mary Beth|title=Senior Care Is Focus of Dispute|work=The Plain Dealer|date=May 19, 1994|page=B5}} and Wiggins Place, a second assisted living community, in 2004.{{cite news|title=On the Go|work=The Plain Dealer|date=May 31, 2004|page=E2}}

Villa Angela completed a Modernist school building for its girls' academy on its {{convert|55|acre|km2|adj=on}} property at the mouth of Euclid Creek{{cite news|last=Kelly|first=Michael|title=Villa Angela Academy Will Get New $3-Million School Building|work=The Plain Dealer|date=October 9, 1970|page=9}} in April 1972.{{cite news|last=Crawford|first=John A.|title=Villa Angela Builds New School|work=The Plain Dealer|date=January 2, 1972|page=I6}} It opened to students in September 1972.{{cite news|title=Catholic Schools Shrink, But New Academy Ready|work=The Plain Dealer|date=September 4, 1972|page=D5}} The 1864 school building was razed in late 1972.{{cite news|title=Villa Angela Sets Auction Saturday|work=The Plain Dealer|date=September 27, 1972|page=A9|postscript=none}}; {{cite news|title=Today's Catholic School|work=The Plain Dealer|date=March 18, 1973|page=Plain Dealer Sunday Magazine 52}}

In 1976, the Rouse Co. announced it would construct a $25 million (${{formatnum:{{Inflation|US|25000000|1976|r=-5}}}} in {{Inflation-year|US}} dollars) shopping mall, Beachwood Place, on {{convert|50|acre|km2}} of land owned by the Ratner family on the southeast corner of Richmond and Cedar Roads.{{cite news|last=Kelly|first=Michael|title=Saks Fifth Avenue to Open Branch Here|work=The Plain Dealer|date=May 20, 1976|page=41}} The mall (whose cost rose to $30 million (${{formatnum:{{Inflation|US|30000000|1976|r=-5}}}} in {{Inflation-year|US}} dollars) within four months){{cite news|title=Beachwood Board OK's Plans for Shopping Mall|work=The Plain Dealer|date=October 2, 1976|page=12}} began construction atop a portion of the headwaters of the main branch of Euclid Creek{{cite news|last=Kuehner|first=John C.|title=S. Euclid Will Not Go With Flow On Flooding|work=The Plain Dealer|date=April 17, 1997|page=B1}} in August 1977.{{cite news|last=Gerdel|first=Thomas W.|title=Brooks Bros. Looks For A Suitable Site Here|work=The Plain Dealer|date=July 13, 1977|page=22}} Much of the channel was altered and realigned prior to construction.{{cite news|last=Kuehner|first=John C.|title=Debate Stormy on Beachwood Flood|work=The Plain Dealer|date=August 22, 1997|page=B1}} Beachwood Place opened in late August 1978.{{cite news|last=Kelly|first=Michael|title=Beachwood Place Has Spirits Bubbling|work=The Plain Dealer|date=August 22, 1978|page=B6}}

In 1981, after more than a decade of flooding and discussion about how to correct it,{{cite news|last=Thoma|first=Pauline|title=Rein In Euclid Creek Is Flood Project Aim|work=The Plain Dealer|date=October 1, 1983|page=A7}} the United States Army Corps of Engineers acted to reduce erosion and flooding on Euclid Creek between Villaview Road and Lakeshore Blvd. The narrow-arched, culverted Lakeshore Blvd. bridge over Euclid Creek was replaced with a {{convert|100|ft|m|adj=on}} wide span{{cite news|title=House Unit OKs Euclid Creek Flood Control Project Grant|work=The Plain Dealer|date=July 18, 1981|page=A22}} at a cost of $1 million (${{formatnum:{{Inflation|US|1000000|1982|r=-5}}}} in {{Inflation-year|US}} dollars).{{cite news|last=Clark|first=Gary R.|title=Runway Extension Approved|work=The Plain Dealer|date=December 21, 1982|page=A26}}{{Efn|The bridge was named for Louis Stokes, the U.S. representative in whose district the bridge was located and who had secured funding for the project.{{cite news|title=Lake Shore Bridge Named for Stokes|work=The Plain Dealer|date=June 23, 1988|page=C2}}}} The city of Cleveland spent another $650,000 (${{formatnum:{{Inflation|US|650000|1982|r=-5}}}} in {{Inflation-year|US}} dollars) to purchase {{convert|25|acre|km2}} of bank along the stream between Euclid Avenue and the lakeshore. The 1930s-era stone block reinforcing the bank was removed,{{cite news|last=Thoma|first=Pauline|title=Zoo On the Move|work=The Plain Dealer|date=August 17, 1983|page=A23}} the {{convert|1.3|mi|km}} of creek between Lakeshore Blvd. and the lake was straightened, the creek north of Euclid Avenue widened and deepened, and an additional {{convert|600|ft|m}} of the banks and streambed covered in concrete at a cost of $2.12 million (${{formatnum:{{Inflation|US|2120000|1983|r=-5}}}} in {{Inflation-year|US}} dollars).{{Efn|This left {{convert|1500|ft|m}} of the channel in this area lined with concrete.}} The Corps also constructed a levee along the east bank of Euclid Creek between Lakeshore Blvd. and E. 179th Street at a cost of about $2.23 million (${{formatnum:{{Inflation|US|2230000|1983|r=-5}}}} in {{Inflation-year|US}} dollars).{{Efn|The total cost of all projects was $6 million (${{formatnum:{{Inflation|US|6000000|1983|r=-5}}}} in {{Inflation-year|US}} dollars), of which $1.6 million (${{formatnum:{{Inflation|US|1600000|1981|r=-5}}}} in {{Inflation-year|US}} dollars) came from federal funding.}}

Minor changes to the Euclid Creek lacustuary came in 1985, when The Trust for Public Land purchased a small parcel from Villa Angela to expand Euclid Beach.{{cite news|last=Vishnevsky|first=Zina|title=Diocese Completes Merger of Villa Angela, St. Joseph|work=The Plain Dealer|date=August 18, 1989|page=20}} Two years later, the Roman Catholic Diocese of Cleveland announced tentative plans to merge Villa Angela with St. Joseph Academy,{{cite news|last1=Stringfellow|first1=Eric|last2=Breckenridge|first2=Tom|title=3 Catholic High Schools Weighing Merger|work=The Plain Dealer|date=March 19, 1987|page=B12}} the former St. Joseph's Seminary which had become all-male high school and relocated {{convert|2|mi|km}} to the northeast at 18491 Lakeshore Blvd.{{cite news|title=St. Joseph, Villa Angela To Merge|work=The Plain Dealer|date=October 7, 1988|page=B7}} As Cuyahoga County embarked on a $4.5 million (${{formatnum:{{Inflation|US|4500000|1987|r=-5}}}} in {{Inflation-year|US}} dollars), state-funded Euclid Creek flood control project in the fall of 1987, the city and state began planning to purchase the Villa Angela lands and convert them to a public park.{{cite news|title=Illegal Dipping By Mayor|work=The Plain Dealer|date=November 14, 1987|page=B3}}

Major changes to the Euclid Creek lacustuary when Villa Angela closed in August 1989, setting in motion a major change in the way the lacustuary of Euclid Creek was managed. In July 1989, The Trust for Public Land (with financial assistance from four other foundations) purchased {{convert|26|acre|km2}} of land from Villa Angela and Associated Estates (a real estate development company) for $2.45 million (${{formatnum:{{Inflation|US|2450000|1989|r=-5}}}} in {{Inflation-year|US}} dollars). This land was then purchased by ODNR for use as parkland.{{cite news|last=Lawless|first=James|title=By Nature, He Makes His Deals Out in the Open|work=The Plain Dealer|date=July 21, 1989|page=B2}}{{Efn|ODNR purchased {{convert|12|acre|km2}} of land for $2.45 million (${{formatnum:{{Inflation|US|2450000|1989|r=-5}}}} in {{Inflation-year|US}} dollars) in April 1990, and the remaining {{convert|13.47|acre|km2}} of land for $1.15 million (${{formatnum:{{Inflation|US|2450000|1989|r=-5}}}} in {{Inflation-year|US}} dollars) in May 1991.{{cite news|title=State Board OKs Purchase of Villa Angela Land for Park|work=The Plain Dealer|date=May 14, 1991|page=B2}}}} The state also spent $607,000 (${{formatnum:{{Inflation|US|607000|1990|r=-5}}}} in {{Inflation-year|US}} dollars) on gabions to stabilize Euclid Creek's banks between Anderson and Mayfield Roads, and another $250,000 (${{formatnum:{{Inflation|US|250000|1990|r=-5}}}} in {{Inflation-year|US}} dollars) to straighten and add retaining walls to Euclid Creek's Redstone Run tributary between Schaefer Park and Roland Park in Lyndhurst.{{cite news|last=Thoma|first=Pauline|title=Lakefront Park to Add 12 Near Villa Angela|work=The Plain Dealer|date=April 9, 1990|page=E1}} The Cleveland Public Library (CPL) system purchased {{convert|1|acre|km2}} of land from Villa Angela in September 1990 for $160,000 (${{formatnum:{{Inflation|US|160000|1990|r=-5}}}} in {{Inflation-year|US}} dollars) for the construction of a new branch library to replace its Nottingham and Memorial branches (which it intended to merge).{{cite news|last=Stainer|first=Harry|title=Academy Site For Library Supported|work=The Plain Dealer|date=February 1, 1990|page=D10|postscript=none}}; {{cite news|last=Hagen|first=John F.|title=Decision on Library Branch's Fate Delayed|work=The Plain Dealer|date=September 21, 1990|page=C3}} In May 1991, CPL purchased an additional {{convert|14.6|acre|km2}} of Villa Angela land (which included the 1973 school building) for $2.2 million (${{formatnum:{{Inflation|US|2200000|1991|r=-5}}}} in {{Inflation-year|US}} dollars).{{cite news|last=Stainer|first=Harry|title=Library to Purchase School for Branch|work=The Plain Dealer|date=May 17, 1991|page=B4}}{{cite news|title=Library Branch to Remain Closed, Board Decides|work=The Plain Dealer|date=August 7, 1991|page=B5}} The library system agreed to keep a part of its acreage parkland, and allowed ODNR to construct a road through this area to provide improved access to the new park at the creek's mouth. CPL spent the next three years and $6.1 million (${{formatnum:{{Inflation|US|6100000|1994|r=-5}}}} in {{Inflation-year|US}} dollars) remodeling the school into a {{convert|10000|sqft|m2|adj=on}} branch library and {{convert|115000|sqft|m2|adj=on}} administrative structure that provided storage for seldom-used books, the community service department, the technical services department, and training and conference facilities.{{cite news|title=Library Unveils Plans for Former Villa Angela Academy|work=The Plain Dealer|date=May 23, 1992|page=B4|postscript=none}}; {{cite news|title=Library Board OKs $6.1 Million in Contracts|work=The Plain Dealer|date=December 18, 1991|page=C2}} The new Nottingham-Memorial Branch Library (the largest branch in the CPL system) opened on August 8, 1994.{{cite news|last=Stainer|first=Harry|title=New Library Is Child-Friendly|work=The Plain Dealer|date=August 9, 1994|page=B2}}

In 1991, Montefiore Home, a nursing home serving the Jewish community, opened a 240-room facility adjacent to the south side of Menorah Park in Beachwood, further impacting the headwaters of the main branch of Euclid Creek.{{cite news|last=Segall|first=Grant|title=It's Been A Moving Experience|work=The Plain Dealer|date=October 21, 1991|page=B1}} The facility underwent a major expansion in 2005.{{cite news|last=Wood|first=Allison|title=Jewish initiative receives $5M grant|work=Crain's Cleveland Business|date=June 6, 2005|access-date=May 5, 2018|url=http://www.crainscleveland.com/article/20050606/FREE/50606006/jewish-initiative-receives-5m-grant}} Montefiore added the eight-unit Willensky Residence assisted living facility for individuals with Alzheimer's disease in 2012,{{cite news|last=Butz|first=Michael C.|title=Montefiore memory care pavilion named for Willenskys|work=Cleveland Jewish News|date=December 27, 2012|access-date=May 5, 2018|url=https://www.clevelandjewishnews.com/news/local/montefiore-memory-care-pavilion-named-for-willenskys/article_b76808c8-5053-11e2-804b-001a4bcf887a.html}} and expanded it to 25 units in 2015.{{cite news|last=Wittenberg|first=Ed|title=Montefiore's Willensky Residence undergoes expansion|work=Cleveland Jewish News|date=February 13, 2015|access-date=May 5, 2018|url=https://www.clevelandjewishnews.com/news/local/montefiore-s-willensky-residence-undergoes-expansion/article_a018bc94-b14f-11e4-83be-17d335f4684d.html}} Another expansion of the Montefiore campus, the six-unit Maltz Hospice House, opened in April 2015.{{cite news|last=Wittenberg|first=Ed|title=Montefiore's Rock to step down in 2015|work=Cleveland Jewish News|date=April 8, 2014|access-date=May 5, 2018|url=https://www.clevelandjewishnews.com/news/local/montefiore-s-rock-to-step-down-in/article_273c4874-bf27-11e3-9813-0019bb2963f4.html|postscript=none}}; {{cite news|last=Koehn|first=Amanda|title=Driscol first full-time medical director of Montefiore's Vinney Hospice|work=Cleveland Jewish News|date=November 23, 2016|access-date=May 5, 2018|url=https://www.clevelandjewishnews.com/news/local_news/driscol-first-full-time-medical-director-of-montefiore-s-vinney/article_80b19008-b182-11e6-a88f-c37b2a547135.html|postscript=none}}; {{cite news|title=Montefiore's Vinney Hospice, Maltz Hospice House provide compassionate end-of-life care for loved one|work=Cleveland Jewish News|date=March 21, 2018|access-date=May 5, 2018|url=https://www.clevelandjewishnews.com/features/special_sections/boomer/montefiore-s-vinney-hospice-maltz-hospice-house-provide-compassionate-end/article_43a295f8-2d29-11e8-b40d-bbff776a8df6.html}}

The 1932 bridge over Euclid Creek was rehabilitated in 1991 at a cost of $1 million (${{formatnum:{{Inflation|US|1000000|1991|r=-5}}}} in {{Inflation-year|US}} dollars). The bridge carrying Anderson Road over Euclid Creek underwent significant repair of its deck in 1991 as well.{{cite news|title=Troubled Bridge Over Water Has Some Worried|work=The Plain Dealer|date=November 17, 1991|page=B14}}

ODNR constructed a two-lane road and two parking lots{{Efn|Initially, the state created 530 total parking spaces on the former Villa Angela land. This was reduced to 200 the year after they were built, while another 270 were added at the Wildwood marina to the east.}} in the new park at the mouth of Euclid Creek in 1993 and 1994 at a cost of $6.5 million (${{formatnum:{{Inflation|US|6500000|1993|r=-5}}}} in {{Inflation-year|US}} dollars).{{cite news|title=Public Meeting to Address Lakefront|work=The Plain Dealer|date=June 24, 1993|page=B2|postscript=none}}; {{cite news|last=Luttner|first=Steve|title=Enough, Already, With the Asphalt|work=The Plain Dealer|date=August 8, 1993|page=C3}} Euclid Creek was bridged with a new vehicular-pedestrian bridge near the creek mouth to provide access to the parking lots. Another $2.3 million (${{formatnum:{{Inflation|US|2300000|1994|r=-5}}}} in {{Inflation-year|US}} dollars) was spent in 1994 adding improvements such as a new beach,{{Efn|About {{convert|600|ft|m}} of beach on the old Villa Angela land was created, adding to the existing {{convert|600|ft|m}} of beach at Euclid Beach Park.}} a {{convert|1|mi|km|adj=on}} long biking/hiking path, new boat docks, a second two-lane boat launch ramp, breakwater, and a fishing pier, and the park was administratively merged with the Cleveland Lakefront State Park.{{cite news|last=Thoma|first=Pauline|title=Beach Trip Will Be A Breeze|work=The Plain Dealer|date=April 13, 1992|page=B3}}{{cite news|title=Villa Angela to Join State Park Chain Along Lake|work=The Plain Dealer|date=May 17, 1994|page=B5}}{{Efn|The Neff Road entrance to the park was also closed, taking vehicular traffic away from that residential street and moving it to the new entrance at Lakeshore Blvd.}} The fishing pier, which was on the west side of the mouth of Euclid Creek, was completed in the spring of 1995. The creek mouth was dredged when the pier was completed.{{cite news|last=Egan|first=D'Arcy|title=Anglers Eager to Use New Pier|work=The Plain Dealer|date=April 28, 1995|page=D9}}

Widening of Interstate 271 to eight from four lanes, which was completed in 1993, led to major new flooding problems on Euclid Creek. The Ohio Department of Transportation (ODOT) had moved forward with the project without constructing any new flood control measures after concluding that the interstate highway's existing flood control measures, designed in the 1950s and 1960s, were adequate for an eight-lane freeway. In October 1994, the Cuyahoga Soil and Water Conservation District (CS&WCD) concluded that the widening project had contributed to extensive flooding in Willoughby Hills.{{cite news|last=Kuehner|first=John C.|title=I-271 Widening Prompts Concerns About Flooding|work=The Plain Dealer|date=October 15, 1994|page=B1}} According to CS&WCD studies, ODOT engineers did not account for the increased runoff into Euclid Creek caused by extensive new impervious development, channel straightening, and channelization in Beachwood, Lyndhurst, and Highland Heights since the design of Interstate 271. An investigation by the Federal Emergency Management Agency (FEMA) in 1997 found that Beachwood had for years permitted construction within the Euclid Creek flood plain that did not follow federal regulations. Nor had the city alerted FEMA to the alterations made to the stream's channel (as required by law) during the construction of Beachwood Place in 1977 and 1978.

In November 1997, a hydrological study (paid for by the city of South Euclid) blamed the widening of I-271 and overdevelopment in Beachwood for significantly worse erosion problems in the Euclid Creek Reservation and flooding in communities downstream from Beachwood.{{Efn|The report did not actually study flooding and sewer backups in the city of South Euclid, but in communities downstream of South Euclid.}} Stormwater velocity had increased from 60 percent to 90 percent since 1959, and the volume of stormwater runoff from 40 percent to 80 percent, even as storm and regular rainfall remained constant.{{cite news|last=Kuehner|first=John C.|title=Study Links Flood Problems to Beachwood Development|work=The Plain Dealer|date=November 7, 1997|page=B1}} A second study, issued in June 1999, concluded that the city of Beachwood had not followed standard stormwater management practices since 1980,{{cite news|last=Kuehner|first=John C.|title=Beachwood Says It's Blameless|work=The Plain Dealer|date=August 17, 1999|page=B10}} and the two stormwater detention basins it had constructed were of only minimal effectiveness.{{cite news|last=Tinsley|first=Jesse|title=Soggy Residents Dread Development|work=The Plain Dealer|date=June 18, 2000|page=B1}}

In response to the Euclid Creek flooding and other extensive combined sewer problems in the greater Cleveland area, the Northeast Ohio Regional Sewer District initiated in 2001 a $1 billion (${{formatnum:{{Inflation|US|1000000000|2001|r=-5}}}} in {{Inflation-year|US}} dollars) project to construct {{convert|40|mi|km}} of underground detention basins, tunnels, and sewers on Cleveland's East Side.{{cite news|last=Kuehner|first=John C.|title=Sewer Project to Clean Up East Side Waterways|work=The Plain Dealer|date=November 2, 2001|page=B1}} The first phase of the project was the construction of the Euclid Creek Storage Tunnel, a {{convert|24|ft|m|adj=on}} diameter, {{convert|3|mi|km|adj=on}} long underground stormwater storage basin that stretched from the Euclid Creek Reservation northwest to the city of Bratenahl.{{cite news|last=Kuehner|first=John C.|title=Dig This: Big Sewer Upgrade Coming|work=The Plain Dealer|date=April 6, 2005|page=B1}}{{Efn|The storage tunnel ran from NEOSRD's Easterly Wastewater Treatment Plant in Bratenahl to Lake Erie, under Lake Erie, back onto the shoreline at E. 156th Street, and along Lakeshore Blvd. and Nottingham Road to terminate at St. Clair Avenue. It was {{convert|189|to|220|ft|m}} underground, and capable of storing up to {{convert|61000000|gal|kl}}.}} The Euclid Creek Storage Tunnel was completed in September 2015,{{cite news|last=McCarty|first=James F.|title=Sewer District's Tunnel Project Done Under Budget|work=The Plain Dealer|date=September 18, 2015|page=A4}} and became operational in June 2016 when the Easterly Tunnel Dewatering Pump Station went online. The pumping station was designed to empty the Euclid Creek Storage Tunnel as well as the as-yet incomplete Dugway Storage Tunnel and Doan Valley Storage Tunnel and divert their stored stormwater to the Easterly Wastewater Treatment Plant.{{cite news|last=McCarty|first=James F.|title=Sewage Pump Station Nearly Completed|work=The Plain Dealer|date=May 30, 2016|page=A1}}{{Efn|The pumping station was designed to handle {{convert|6667000|gal|kl}} an hour.}}

2001 also saw Cleveland and nine east-side suburbs form the Euclid Creek Watershed Council to work together on Euclid Creek and combined sewer flooding. Water quality and velocity in Euclid Creek was of a major concern to the group, which tentatively set plans to restore meanders to the stream as an initial goal.{{cite news|last=Tinsley|first=Jesse|title=Cleveland and 9 Eastern Suburbs to Work Together to End Flooding|work=The Plain Dealer|date=January 23, 2003|page=B4}}

In 2002, a new nonprofit advocacy group, the Euclid Creek Watershed Council, formed to address flooding and water quality issues along Euclid Creek. The group began working closely with the Euclid Creek Watershed Coordinator, one of 319 watershed coordinators funded by ODNR. Housed within the Cuyahoga Soil and Water Conservation District, the Watershed Coordinator acts both as the secretary of the Euclid Creek Watershed Council and its staff person.{{sfn|Euclid Creek Watershed Council|2006|pages=23-24}}

The headwaters of the main branch of Euclid Creek were significantly impacted by the construction of the Legacy Village lifestyle center in Lyndhurst in 2003. TRW Inc. had purchased the Bolton estate in 1985 and the Blossom estate in 1992.{{Efn|The Blossom children continued to hold the estate until the last child's death in 1991.{{sfn|Stern|2005|page=4}}}} Although the Bolton mansion was retained, the company demolished the Blossom house (but not the service compound structures) in 1993. Within a few years, TRW resolved to close its operations in Lyndhurst and sell its property to developers.{{sfn|Stern|2005|page=4}} Lyndhurst voters narrowly approved rezoning the area to retail from residential in November 2000. TRW donated most of the old Bolton estate to the Cleveland Clinic in 2002, selling the remaining {{convert|67|acre|m2}} to First Interstate Properties, a real estate development firm.

Legacy Village opened on October 24, 2003. Only 60 percent ({{convert|40.2|acre|m2}}) of the land obtained from TRW was developed. Some of the remaining land was used as a buffer between the mall and local residences, while {{convert|25|acre|m2}} of woodlands and wetlands were retained and restored (including the old Bolton wild garden).{{sfn|Stern|2005|page=5}} Land west of Legacy Village, located between the shopping center and a luxury development known as "The Woods", contained a small main branch tributary. The Cuyahoga Soil and Water Conservation District was granted a conservation easement over this land to preserve it.{{sfn|Stern|2005|page=6}} First Interstate restored the Blossom service compound, which was then listed on the National Register of Historic Places in February 2004.{{sfn|Stern|2005|page=5}}

Dam removal on Euclid Creek became a priority for the stream's restoration advocates in the mid-2000s. The Ohio EPA released in 2005 a study (required by the federal Clean Water Act) which concluded that alteration or removal of the St. Clair Spillway would greatly improve invertebrate and fish populations in the creek. Cost of removing the spillway proved prohibitive, however: A 2010 study estimated this cost at $2 million (${{formatnum:{{Inflation|US|2000000|2010|r=-5}}}} in {{Inflation-year|US}} dollars). The Euclid Creek Reservation Dam was removed at a cost of $527,000 (${{formatnum:{{Inflation|US|527000|2010|r=-5}}}} in {{Inflation-year|US}} dollars) in 2010 after a five-year effort. Part of the cost went to restoring the stream after the dam's removal.{{cite news|last=Scott|first=Michael|title=Euclid Creek Dam Removed to Improve Water Quality|work=The Plain Dealer|date=December 20, 2010|page=B1}}

Despite improvements, by 2010 flash flood-like runoff remained an issue for Euclid Creek. The Plain Dealer newspaper called the Euclid Creek Reservation "the region's catch-basin for storm water runoff". Flash-like flooding was so severe that the park had been extensively damaged and erosion control within the park was failing.{{cite news|last=Ewinger|first=James|title=Storm Water Runoff Accelerating Erosion in the Metroparks|work=The Plain Dealer|date=April 14, 2010|page=A1}}

Cleveland Metroparks purchased the Acacia Country Club in 2012 and began restoring Euclid Creek within the new park boundaries. Acacia's owners agreed to sell the land to The Conservation Fund for $14.75 million (${{formatnum:{{Inflation|US|14750000|2012|r=-5}}}} in {{Inflation-year|US}} dollars),{{cite news|last=McFee|first=Michelle Jarboe|title=Acacia sale to Conservation Fund approved|work=The Plain Dealer|date=September 7, 2012|page=A1}} despite opposition from Lyndhurst Mayor Joseph Cicero and a group of real estate developers (who offered $16 million for the land).{{cite news|last=McFee|first=Michelle Jarboe|title=Lyndhurst offers Acacia club $16M to block sale to Conservation Fund|work=The Plain Dealer|date=August 23, 2012|page=C1}} An anonymous donor financed The Conservation Fund's acquisition, with the stipulation that the land no longer be used as a golf course but rather be converted into a nature park. A month later, The Conservation Fund donated the land to Cleveland Metroparks. The nonprofit also made a $300,000 (${{formatnum:{{Inflation|US|300000|2012|r=-5}}}} in {{Inflation-year|US}} dollars) donation to the park agency to help with the transition, and pledged another $200,000 (${{formatnum:{{Inflation|US|200000|2012|r=-5}}}} in {{Inflation-year|US}} dollars) once restoration plans had been finalized.{{cite news|last=Ewinger|first=James|title=Metroparks to take over Acacia site|work=The Plain Dealer|date=October 12, 2012|page=A1}} One of the first projects Cleveland Metroparks undertook at Acacia was the restoration of Euclid Creek. This involved removing the culverts through which the creek flowed, rebuilding a meandering channel, removing armor and channelization structures, and reconnecting the stream to its floodplain. Projects the following year included removing the tile drainage system which underlay the park, building swales throughout the park, and planting extensive new trees, shrubs, native plants, and grasses around Euclid Creek and elsewhere in the new park. The work was paid for with $1.5 million in grants from the Ohio EPA and the United States Fish and Wildlife Service. The Cuyahoga Soil and Water Conservation District called it the "single largest restoration effort in the history of the watershed".{{cite news|last=Ewinger|first=James|title=Acacia Site Being Restored to Natural State|work=The Plain Dealer|date=December 19, 2016|page=A1}}

A pedestrian-only bridge was constructed over the mouth of Euclid Creek by Cleveland Metroparks in 2016. The 1992 fishing pier at Lower Euclid Creek Reservation was demolished in the fall of 2016, and a new {{convert|220|ft|m|adj=on}} pier constructed in 2017.{{cite news|last=Ewinger|first=James|title=Euclid Beach Pier To Be Replaced|work=The Plain Dealer|date=October 2, 2016|page=A6}}

NEORSD began a Euclid Creek Shoaling Removal Project in November 2017. The two-month-long project removed gravel, sand, wood, and trash which degraded habitat and inhibited water flows in Euclid Creek's manmade channel between Lakeshore Boulevard and Villaview Road.

;Notes

{{notelist}}

;Citations

{{reflist|30em}}

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• {{cite book|last=Hartman|first=Jan Cigliano|title=Showplace of America: Cleveland's Euclid Avenue, 1850-1910|location=Kent, Ohio|publisher=Kent State University Press|date=1991|isbn=9780873384452|url=https://books.google.com/books?id=6Qa3b5atr4UC}}
• {{cite book|last=Hattendorf|first=John B.|title=Talking About Naval History|location=Newport, R.I.|publisher=Naval War College Press|date=2011|isbn=9781884733741|url=https://books.google.com/books?id=p84uvTqrM_cC}}
• {{cite book|ref={{sfnRef|History of Lorain County, Ohio|1879}}|author=|title=History of Lorain County, Ohio: With Illustrations and Biographical Sketches of Some of Its Most Prominent Men and Pioneers|location=Philadelphia|publisher=Williams Brothers|date=1879|url=https://books.google.com/books?id=0NY4AQAAMAAJ}}
• {{cite book|last=Hopkins|first=Kenneth L.|title=Cleveland Area Golf|location=Charleston, S.C.|publisher=Arcadia Publishing|date=2004|isbn=9780738533605|url=https://books.google.com/books?id=aF_KjLVVS3gC}}
• {{cite book|last1=Hubbard|first1=George D.|last2=Stauffer|first2=Clinton R.|last3=Bownocker|first3=John Adams|last4=Prosser|first4=Charles Smith|last5=Cumings|first5=Edgar Roscoe|title=Geologic Atlas of the United States, Issue 197|location=Washington, D.C.|publisher=U.S. Geologic Survey|date=1915|url=https://books.google.com/books?id=KllGAQAAMAAJ&q=%22Erie%20plain%22&pg=PA1}}
• {{cite book|last=Johnson|first=Crisfield|title=History of Cuyahoga County, Ohio: With Portraits and Biographical Sketches of Its Prominent Men and Pioneers|location=Philadelphia|publisher=D.W. Ensign|date=1879|url=https://books.google.com/books?id=L_I7AQAAMAAJ}}
• {{cite book|last=Krejci|first=William G.|title=Buried Beneath Cleveland: Lost Cemeteries of Cuyahoga County|location=Charleston, S.C.|publisher=The History Press|date=2015|isbn=9781467117722|url=https://books.google.com/books?id=NlhyCwAAQBAJ}}
• {{cite book|last1=Larick|first1=Roy|last2=Gibbons|first2=Bob|last3=Siplock|first3=Edward|title=Euclid Creek|location=Charleston, S.C.|publisher=Arcadia Publishing|date=2005|isbn=9780738539539|url=https://books.google.com/books?id=83jNaF8cdMwC}}
• {{cite book|last1=Leahy|first1=Todd|last2=Wilson|first2=Nathan|title=Historical Dictionary of Native American Movements|location=Lanham, Md.|publisher=Rowman & Littlefield|date=2016|isbn=9781442268081|url=https://books.google.com/books?id=KzSHDAAAQBAJ}}
• {{cite book|last=Leverett|first=Leverett|title=Glacial Formations and Drainage Features of the Erie and Ohio Basins. Monographs of the United States Geological Survey. Volume XLI|series=Geological Survey (U.S.). Monographs,v. 41 |location=Washington, D.C.|publisher=Government Printing Office|date=1902|hdl=2027/ucw.ark:/13960/t9k36cc29}}
• {{cite book|last=Matowitz|first=Thomas G.|title=Cleveland Metroparks|location=Charleston, S.C.|publisher=Arcadia Publishing|date=2006|isbn=9780738540696|url=https://books.google.com/books?id=fJr7TCZRaUgC}}
• {{cite book|last=Morton|first=Marian J.|title=Cleveland Heights: The Making of an Urban Suburb|location=Charleston, S.C.|publisher=Arcadia Publishing|date=2002|isbn=9780738523842|url=https://books.google.com/books?id=gM6Sb8_Wg-gC}}
• {{cite book|author=Ohio Commissioner of Railroads and Telegraphs|title=Annual Report of the Commissioner of Railroads and Telegraphs of Ohio for the Year Ending June 30, 1883|location=Columbus, Ohio|publisher=Myers Brothers, State Printers|date=1884|hdl=2027/uc1.b2896937}}
• {{cite book|ref={{sfnRef|Orth|1910a}}|last=Orth|first=Samuel P.|title=A History of Cleveland, Ohio. Volume 1|location=Chicago|publisher=S.J. Clarke Publishing|date=1910|url=https://books.google.com/books?id=R5Q6AQAAIAAJ}}
• {{cite book|ref={{sfnRef|Orth|1910b}}|last=Orth|first=Samuel P.|title=A History of Cleveland, Ohio. Volume 2|location=Chicago|publisher=S.J. Clarke Publishing|date=1910|url=https://books.google.com/books?id=H5U6AQAAIAAJ}}
• {{cite book|last1=Pepper|first1=James F.|last2=DeWitt|first2=Wallace Jr.|last3=Demarest|first3=David F.|title=Geology of the Bedford Shale and Berea Sandstone in the Appalachian Basin. Geologic Survey Professional Paper 259|location=Washington, D.C.|publisher=U.S. Government Printing Office|date=1954|url=https://books.google.com/books?id=NTpSAQAAMAAJ}}
• {{cite book|last=Prosser|first=Charles S.|chapter=Bulletin 15, The Devonian and Mississippian of Northeast Ohio|title=Geological Survey of Ohio. Volume XI|location=Columbus, Ohio|publisher=Ohio Geological Survey|date=1913|url=https://books.google.com/books?id=rDdAAQAAMAAJ}}
• {{cite report|last=Redmond|first=Brian G.|title=Before the Western Reserve: An Archeological History of Northeast Ohio|location=Cleveland|publisher=Cleveland Museum of Natural History|date=March 2006|access-date=July 14, 2017|url=http://teachingcleveland.org/wp-content/uploads/2013/01/Before_the_Western_Reserve_An_Archaeolog.pdf}}
• {{cite book|last=Redmond|first=Brian G.|chapter=The South Park Village Site, Northeast Ohio: A Late Prehistoric Village|title=Archaeology in America: An Encyclopedia. Volume 1|editor1-last=McManamon|editor1-first=Francis P.|editor2-last=Cordell|editor2-first=Linda S.|editor3-last=Lightfoot|editor3-first=Kent G.|editor4-last=Milner|editor4-first=George R.|location=Westport, Conn.|publisher=Greenwood Press|date=2009|isbn=9780313331848|url=https://books.google.com/books?id=arfWRW5OFVgC}}
• {{cite book|editor-last=Ricky|editor-first=Donald B.|title=Encyclopedia of Ohio Indians|location=St. Clair Shores, Mich.|publisher=Somerset Publishers|date=1998|isbn=9780403094806}}
• {{cite book|last=Rose|first=William Ganson|title=Cleveland: The Making of a City|location=Kent, Ohio|publisher=Kent State University Press|date=1990|isbn=9780873384285|url=https://books.google.com/books?id=IT1NVT1vEwUC}}
• {{cite report|author=South Euclid-Lyndhurst Historical Society|title=South Euclid|location=Charleston, S.C.|publisher=Arcadia Publishing|date=2011|isbn=9780738582719|url=https://books.google.com/books?id=kIrUnW8XUM8C}}
• {{cite book|last=Springirth|first=Kenneth C.|title=Northwestern Pennsylvania Railroads|location=Charleston, S.C.|publisher=Arcadia Publishing|date=2010|isbn=9780738573472|url=https://books.google.com/books?id=6EE9Q8PQ_y8C}}
• {{cite report|last=Stern|first=Julie D.|title=ULI Development Case Studies: Legacy Village|location=Washington, D.C.|publisher=Urban Land Institute|date=2005|access-date=April 30, 2018|url=https://casestudies.uli.org/wp-content/uploads/sites/98/2015/12/C035016.pdf|archive-date=May 10, 2018|archive-url=https://web.archive.org/web/20180510050644/https://casestudies.uli.org/wp-content/uploads/sites/98/2015/12/C035016.pdf|url-status=dead}}
• {{cite book|last1=Szabo|first1=John P.|last2=Angle|first2=Michael P.|last3=Eddy|first3=Alex M.|chapter=Pleistocene Glaciation of Ohio, USA|title=Quaternary Glaciations: Extent and Chronology: A Closer Look|editor1-last=Ehlers|editor1-first=Jurgen|editor2-last=Gibbard|editor2-first=Philip L.|editor3-last=Hughes|editor3-first=Philip D.|location=Oxford, U.K.|publisher=Elsevier|date=2011|isbn=9780444534477|url=https://books.google.com/books?id=pUjRgq7zyVcC}}
• {{cite book|last=Treat|first=John Harvey|title=The Treat Family: A Genealogy of Trott, Tratt and Treat for Fifteen Generations, and Four Hundred and Fifty Years in England and America: Containing More Than Fifteen Hundred Families in America|location=Salem, Mass.|publisher=The Salem Press Publishing & Printing Company|date=1893|url=https://books.google.com/books?id=qzcEAAAAIAAJ}}
• {{cite book|last=Treer|first=Thomas S.|title=Lyndhurst|location=Charleston, S.C.|publisher=Arcadia Publishing|date=2010|isbn=9780738584201|url=https://books.google.com/books?id=3V3qRPU46zYC}}
• {{cite book|author=U.S. Environmental Protection Agency|title=Environmental Impact Statement. Cleveland Hilltop Planning Area, Ohio|location=Chicago|publisher=U.S. Government Printing Office|date=February 1988|url=https://books.google.com/books?id=o-s0AQAAMAAJ}}
• {{cite book|last=Waldman|first=Carl|title=Encyclopedia of Native American Tribes|location=New York|publisher=Checkmark Books|date=2006|isbn=9780816062744|url=https://books.google.com/books?id=WxomdGVLjZ0C}}
• {{cite book|last1=Weber|first1=Art|last2=Bailey|first2=Bill|last3=DuFresne|first3=Jim|title=Ohio State Park|location=Saginaw, Mich.|publisher=Glovebox Guidebooks of America|date=1997|isbn=9781881139164}}
• {{cite book|last=White|first=Lynne L.|title=The Nickel Plate Road: A Short History of the New York, Chicago and St. Louis R.R.|location=New York|publisher=Newcomen Society in North America|date=1954}}
• {{cite book|last=Whittlesey|first=Charles|title=Early History of Cleveland|location=Cleveland|publisher=Fairbanks, Benedict, & Co., Printers|date=1867|url=https://books.google.com/books?id=W5xlQwd2IkcC}}
• {{cite book|last=Wickham|first=Gertrude Van Rensselaer|title=The Pioneer Families of Cleveland 1796-1840. Volume 1|location=Cleveland|publisher=Evangelical Publishing House|date=1914|url=https://books.google.com/books?id=R9kyAQAAMAAJ}}
• {{cite book|last=Wolf|first=Michael Allan|title=The Zoning of America: 'Euclid v. Ambler'|location=Lawrence, Kan.|publisher=University Press of Kansas|date=2008|isbn=9780700616206}}
• {{cite journal|last=Wood|first=Herbert C.|title=Experiences in Field Work|journal=Bulletin of the American Bureau of Geography|date=March 1901|pages=22–29|hdl=2027/mdp.39015035582033?urlappend=%3Bseq=36|access-date=April 26, 2018|url=https://hdl.handle.net/2027/mdp.39015035582033?urlappend=%3Bseq=36}}

{{refend}}

{{commons category|Euclid Creek}}

• [https://www.friendsofeuclidcreek.com/ Friends of Euclid Creek]

{{authority control}}

{{DEFAULTSORT:Euclid Creek}}

Category:Rivers of Ohio

Category:Bodies of water of Cuyahoga County, Ohio