Appoquinimink River

{{Short description|River in Delaware, United States}}

{{Use American English|date=February 2025}}

{{Infobox river

| name = Appoquinimink River

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| image = Appoquinimink River.jpg

| image_caption = The Appoquinimink River in Odessa in 2006

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| map_size = 180

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| pushpin_map = USA Delaware#USA

| pushpin_map_size = 180

| pushpin_map_caption= Location of the mouth of the Appoquinimink River

| subdivision_type1 = Country

| subdivision_name1 = United States

| subdivision_type2 = State

| subdivision_name2 = Delaware

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| length = {{convert|15|mi|km|abbr=on}}U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. [http://viewer.nationalmap.gov/viewer/ The National Map] {{webarchive |url=https://web.archive.org/web/20120329155652/http://viewer.nationalmap.gov/viewer/ |date=2012-03-29 }}, accessed April 1, 2011

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| source1 =

| source1_location = Near Townsend

| source1_coordinates= {{coord|39|22|52|N|75|44|14|W|display=inline}}{{cite web |url={{Gnis3|213568}} |title=GNIS entry for Appoquinimink River (Feature ID #213568)|author=Geographic Names Information System|authorlink=Geographic Names Information System|accessdate=2007-02-05}}

| source1_elevation = {{convert|23|ft|abbr=on}}(at Wiggins Mill Pond, approx. 1 mi/2 km downstream of source){{cite web |url={{Gnis3|216865}} |title=GNIS entry for Wiggins Mill Pond (Feature ID #216865)|author=Geographic Names Information System|authorlink=Geographic Names Information System|accessdate=2007-02-05}}

| mouth = Delaware Bay

| mouth_location = Near Odessa

| mouth_coordinates = {{coord|39|26|52|N|75|34|49|W|display=inline,title}}

| mouth_elevation = {{convert|0|ft|abbr=on}}

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| basin_size = {{convert|47|sqmi|abbr=on}}{{cite web |url= http://www.epa.gov/reg3wapd/tmdl/de_tmdl/AppoquiniminkRiver/index.htm |archive-url= https://web.archive.org/web/20080716000456/http://www.epa.gov/reg3wapd/tmdl/de_tmdl/AppoquiniminkRiver/index.htm |url-status= dead |archive-date= July 16, 2008 |pages = 3 | title= Nutrient and Dissolved Oxygen TMDL Development for Appoquinimink River, Delaware. | author= United States Environmental Protection Agency | authorlink = United States Environmental Protection Agency |date=December 2003 | accessdate=2007-02-05}}

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The Appoquinimink River is a river flowing to Delaware Bay in northern Delaware in the United States. The river is {{convert|15.3|mi}} long and drains an area of {{convert|47|sqmi}} on the Atlantic Coastal Plain.

The Appoquinimink flows for its entire length in southern New Castle County. It rises approximately {{convert|2|mi|0}} west of Townsend and flows generally eastwardly, south of Middletown and past Odessa, to its mouth at the northern end of Delaware Bay, approximately {{convert|3|mi|0}} east of Odessa.DeLorme (2004). Maryland Delaware Atlas & Gazetteer. p.61, pp.78-79. Yarmouth, Maine: DeLorme. {{ISBN|0-89933-279-X}}. In its upper course the river passes through two man-made lakes, Wiggins Mill Pond and Noxontown Lake;{{cite web |url={{Gnis3|214395}} |title=GNIS entry for Noxontown Lake (Feature ID #214395)|author=Geographic Names Information System|authorlink=Geographic Names Information System|accessdate=2007-02-05}} the river is tidal to the dam at Noxontown Lake, and salinity from Delaware Bay typically affects the lowermost {{convert|5|mi|0}} of the river.{{cite web |url= http://www.epa.gov/reg3wapd/tmdl/de_tmdl/AppoquiniminkRiver/index.htm |archive-url= https://web.archive.org/web/20080716000456/http://www.epa.gov/reg3wapd/tmdl/de_tmdl/AppoquiniminkRiver/index.htm |url-status= dead |archive-date= July 16, 2008 |pages =1–3 | title= Nutrient and Dissolved Oxygen TMDL Development for Appoquinimink River, Delaware. | author= United States Environmental Protection Agency | authorlink = United States Environmental Protection Agency |date=December 2003 | accessdate=2007-02-05}} The lower {{convert|7|mi|0}} of the river are considered to be navigable by the U.S. Army Corps of Engineers.{{cite web|url=http://www.nap.usace.army.mil/channel/nww.htm |title=Navigable waterways of the Philadelphia District. |author=U.S. Army Corps of Engineers, Philadelphia District |authorlink=United States Army Corps of Engineers |accessdate=2007-02-05 |url-status=dead |archiveurl=https://web.archive.org/web/20070628153826/http://www.nap.usace.army.mil/channel/nww.htm |archivedate=2007-06-28 }}

It collects three named tributaries along its course: From the north, Deep Creek, {{convert|4.2|mi}} long (also known historically as the "North Appoquinimink River"{{cite web |url={{Gnis3|213864}} |title=GNIS entry for Deep Creek (Feature ID #213864)|author=Geographic Names Information System|authorlink=Geographic Names Information System|accessdate=2007-02-05}}); and Drawyers Creek,{{cite web |url={{Gnis3|213905}} |title=GNIS entry for Drawyers Creek (Feature ID #213905)|author=Geographic Names Information System|authorlink=Geographic Names Information System|accessdate=2007-02-05}} {{convert|8.2|mi}} long; and from the south, Hangmans Run.{{cite web |url={{Gnis3|214053}} |title=GNIS entry for Hangmans Run (Feature ID #214053)|author=Geographic Names Information System|authorlink=Geographic Names Information System|accessdate=2007-02-05}}

According to 2002 data from the United States Environmental Protection Agency, 54.9% of the Appoquinimink River watershed is occupied by agricultural uses (predominantly soybeans, corn, and wheat); 15.1% is residential; 9.9% is wetland; and 8.8% is forested.{{cite web |url= http://www.epa.gov/reg3wapd/tmdl/de_tmdl/AppoquiniminkRiver/index.htm |archive-url= https://web.archive.org/web/20080716000456/http://www.epa.gov/reg3wapd/tmdl/de_tmdl/AppoquiniminkRiver/index.htm |url-status= dead |archive-date= July 16, 2008 |pages = [https://web.archive.org/web/20070711075435/http://www.epa.gov/reg3wapd/tmdl/de_tmdl/AppoquiniminkRiver/Appo_TMDL_Sec2_final.pdf#page=4 Section Two, p.4.] | title= Nutrient and Dissolved Oxygen TMDL Development for Appoquinimink River, Delaware. | author= United States Environmental Protection Agency | authorlink = United States Environmental Protection Agency |date=December 2003 | accessdate=2007-02-05}}

In 2004, a non-profit group, The Appoquinimink River Association, was founded with a mission to protect the water and natural resources in the region surrounding the Appoquinimink River.{{cite web | url= http://apporiver.org | title= Appoquinimink River Association | accessdate= 2007-04-18 | archive-url= https://web.archive.org/web/20110815141847/http://www.apporiver.org/ | archive-date= 2011-08-15 | url-status= dead }}