:Frozen Run

Frozen Run begins in a pond in Hemlock Township. It flows south in a valley for less than a mile before turning southeast, entering the much broader Frosty Valley. In Frosty Valley, the stream turns east and flows for a few miles before reaching its confluence with Hemlock Creek near the community of Buckhorn.

Frozen Run joins Hemlock Creek {{convert|2.26|mi|km}} upstream of its mouth.{{Citation|url = http://www.lycoming.edu/cwi/pdfs/paGazetterOfStreams.pdf|title = Pennsylvania Gazetteer of Streams|page = 101|date = November 2, 2001|accessdate = July 22, 2014}}

Frozen Run has a number of unnamed tributaries. These include UNT 65640513, UNT 65640565, UNT 65640671, and UNT 65640719.{{Citation|author = Pennsylvania Department of Environmental Protection|url = http://www.dep.state.pa.us/dep/deputate/watermgt/wqp/wqstandards/TMDL/Hemlock_Creek_TMDL_Final_112812.pdf|title = HEMLOCK CREEK WATERSHED TMDL Columbia and Montour Counties|date = January 8, 2013|accessdate = July 22, 2014|author-link = Pennsylvania Department of Environmental Protection}}

Parts of Frozen Run and several of its unnamed tributaries are considered by the Pennsylvania Department of Environmental Protection to be impaired by siltation due to agriculture. {{convert|2.4|mi|km}} of streams in the watershed are considered to be impaired.{{Citation|url=http://www.columbiaccd.org/2013_Chesapeake_Bay_Trib_Strategy.pdf |title=Columbia County, Pennsylvania CHESAPEAKE BAY TRIBUTARY STRATEGY |date=February 2005 |accessdate=July 22, 2014 |url-status=dead |archiveurl=https://web.archive.org/web/20140714133433/http://www.columbiaccd.org/2013_Chesapeake_Bay_Trib_Strategy.pdf |archivedate=July 14, 2014 }}

The water temperature of Frozen Run is {{convert|68|F|C}}. The width of the stream is between {{convert|5|ft|m}} and {{convert|10|ft|m}}. Frozen Run has an elevation of {{convert|535|ft|m}} above sea level near its mouth.{{Citation|url=http://www.topozone.com/states/Pennsylvania.asp?county=Columbia&feature=Stream |title=Topographic Map Stream Features in Columbia County, Pennsylvania |accessdate=July 22, 2014 |url-status=dead |archiveurl=https://web.archive.org/web/20140728202405/http://www.topozone.com/states/Pennsylvania.asp?county=Columbia&feature=Stream |archivedate=July 28, 2014 }}

Frozen Run mostly flows through rock of the Mahantango Formation. However, parts of the stream are over rock of the Harrell Formation and the stream's upper reaches lie over rock of the Trimmers Rock Formation. The stream is in Frosty Valley and is located near the Lightstreet Fault.{{Citation|author = James H. Dolimpio|url = http://collection1.libraries.psu.edu/cdm/ref/collection/pageol/id/51998|title = Bedrock geologic map of the Washingtonville and Millville quadrangles, Montour, Columbia, and Northumberland counties, Pennsylvania|year = 1990|accessdate = July 22, 2014}}

The watershed of Frozen Run has an area of {{convert|3.55|sqmi|km2}}. Areas that are hazardous during floods are largely undeveloped in the watershed of Frozen Run.{{Citation|url = http://www.dotdom1.state.pa.us/jpa%5CjpaApplications.nsf/ByUNID/77FBBC76B5857E2F852573E2005080AB/$File/SR42-047%20H&H%20PG%20032-064%20APP%20C.pdf?OpenElement|title = APPENDIX C FEMA STUDY|date = February 4, 2008|accessdate = July 22, 2014}}

Frozen Run is named for the fact that it is sometimes frozen.{{Citation|author = Walter M. Brasch|publisher = Columbia County Historical Society|url = https://books.google.com/books?id=0erXAAAAMAAJ&q=%22Frozen+Run%22|title = Columbia County place names|year = 1982| isbn=9780880230285 |accessdate = July 22, 2014}} A 1997 book listed Frozen Run as one of the most interesting stream names in Pennsylvania.{{Citation|author = Jeffrey R. Frazier|title = Pennsylvania Fireside Tales: Origins and Foundations of Pennsylvania Mountain Folktales and Legends, Volume 2|date = January 1, 1997}}

Frozen Run has a large population of chubs. According to A. Joseph Armstrong, there may also be trout inhabiting the stream. Frozen Run is designated as a coldwater fishery.

There are forested seeps at the headwaters of Frozen Run. According to the Columbia County Natural Areas Inventory, these may contain "sensitive ecological features".{{Citation|author = The Pennsylvania Science Office of The Nature Conservancy|url = http://www.naturalheritage.state.pa.us/cnai_pdfs/columbia%20county%20nai%202004.pdf|title = Columbia County Natural Areas Inventory 2004|page = 97|year = 2004|accessdate = July 22, 2014}}

• List of tributaries of Fishing Creek (North Branch Susquehanna River)
• West Hemlock Creek

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Category:Rivers of Columbia County, Pennsylvania

Category:Tributaries of Fishing Creek (North Branch Susquehanna River)

Category:Rivers of Pennsylvania