| 词条 | Beaver Run (Chillisquaque Creek tributary) |
| 释义 |
| name = Beaver Run | image = Beaver Run looking downstream in Liberty Township.JPG | image_caption = Beaver Run looking downstream | source1_location = pond in a valley on Montour Ridge in Liberty Township, Montour County, Pennsylvania | mouth_location = Chillisquaque Creek in East Chillisqaque Township, Northumberland County, Pennsylvania | mouth_coordinates = {{coord|40.98725|-76.77873|region:US-PA|format=dms|display=inline,title}} | progression = Chillisquaque Creek → West Branch Susquehanna River | length = {{convert|6.2|mi|km|abbr=on}} | source1_elevation = between {{convert|900|and|920|ft|m}} | mouth_elevation = {{convert|466|ft|m|abbr=on}} | basin_size = {{convert|12.0|sqmi|km2|abbr=on}} }} Beaver Run is a tributary of Chillisquaque Creek in Montour County and Northumberland County, in Pennsylvania, in the United States. It is approximately {{convert|6.2|mi|km}} long and flows through Liberty Township in Montour County and East Chillisquaque Township in Northumberland County.[1] The watershed of the stream has an area of {{convert|12.0|sqmi|km2}}. Reaches of the stream are designated as impaired due to siltation caused by agriculture. Numerous bridges have been constructed across it and it lacks a riparian buffer in some reaches. CourseBeaver Run begins in a pond in a valley on Montour Ridge in Liberty Township, Montour County. It flows west-southwest for about a mile before turning northwest, leaving behind Montour Ridge and entering a much larger valley. The stream eventually turns north and then northeast for a few tenths of a mile before turning northwest again. Some distance after crossing Pennsylvania Route 45, it begins meandering west-southwest for several tenths of a mile before turning northwest. After several tenths of a mile, the stream turns west-southwest. Several tenths of a mile further downstream, it leaves Montour County and enters East Chillisquaque Township, Northumberland County. It almost immediately reaches its confluence with Chillisquaque Creek.[1] Beaver Run joins Chillisquaque Creek {{convert|7.8|mi|km}} upstream of its mouth.[2] Geography and geologyThe elevation near the mouth of Beaver Run is {{convert|466|ft|m}} above sea level.[3] The elevation of the stream's source is between {{convert|900|and|920|ft|m}} above sea level.[1] The channel of Beaver Run (along with those of Chillisquaque Creek, Mauses Creek, and Kase Run) is partially created by Limestone Ridge and a range of hills running in an east-west direction through the central part of Montour County. To the south, the drainage basin of the stream is marked by Montour Ridge.[4] Hydrology, watershed, and biologyThe watershed of Beaver Run has an area of {{convert|12.0|sqmi|km2}}.[2] The mouth of the stream is in the United States Geological Survey quadrangle of Northumberland. However, its source is in the quadrangle of Riverside.[3] There are a total of {{convert|24.6|mi|km}} of streams in the watershed of Beaver Run. Of these, {{convert|12.16|mi|km}}, or 49.4 percent, are designated as impaired. The cause of the impairment is siltation due to agriculture.[5] At least one person has received a permit to discharge stormwater into an unnamed tributary of the stream.[6] HistoryBeaver Run was entered into the Geographic Names Information System on August 2, 1979. Its identifier in the Geographic Names Information System is 1169037.[3] Numerous bridges have been constructed over Beaver Run. A steel stringer/multi-beam or girder bridge carrying State Route 3003 was built over the stream in 1909 and repaired in 1973. It is {{convert|29.9|ft|m}} long and is {{convert|2|mi|km}} northwest of Mooresburg. A steel truss bridge carrying T-308 was built over the stream in 1912 and repaired in 1997. It is {{convert|41.0|ft|m}} long and is {{convert|1.3|mi|km}} east of Potts Grove. A concrete bridge was constructed over the stream in 1924 {{convert|1.7|mi|km}} northwest of Mooresburg. This bridge is {{convert|26.9|ft|m}} long and carries T-318. A concrete slab bridge was constructed over the stream in 1941 and repaired in 2007, {{convert|2|mi|km}} northwest of Mooresburg. This bridge is {{convert|24.9|ft|m}} long and carries State Route 3003. A steel stringer/multi-beam or girder bridge carrying T-306 was constructed across the stream in 1991. It is {{convert|44.9|ft|m}} long and is {{convert|1|mi|km}} southeast of Potts Grove. A concrete culvert bridge carrying T-843 was built across the stream in the same year, is {{convert|24.0|ft|m}} long, and is {{convert|1.6|mi|km}} southeast of Potts Grove. In 1999, a bridge of the same type was constructed over the stream {{convert|2|mi|km}} west of Mooresburg. It is {{convert|25.9|ft|m}} long and carries State Route 3004.[7] BiologyThere are some areas along Beaver Run where the stream lacks a riparian buffer. According to the Montour County Natural Areas Inventory, planting native trees along the stream in these reaches would reduce nonpoint source pollution and raise water quality.[8] An unnamed tributary of Beaver Run is designated as a Warmwater Fishery.[6] See also
References1. ^1 2 {{Citation |author=United States Geological Survey |url=http://viewer.nationalmap.gov/viewer/ |title=The National Map Viewer |accessdate=July 9, 2015 |deadurl=yes |archiveurl=https://www.webcitation.org/66gupqQDM?url=http://viewer.nationalmap.gov/viewer/ |archivedate=April 5, 2012 |df= }} 2. ^1 {{Citation|url = http://www.lycoming.edu/cwi/pdfs/paGazetterOfStreams.pdf|title = Pennsylvania Gazetteer of Streams|page = 32|date = November 2, 2001|accessdate = July 9, 2014}} 3. ^1 2 {{Citation|author = Geographic Names Information System|url = http://gnis.usgs.gov/apex/f?p=136:3:2576544263341::NO:3:P3_FID,P3_TITLE:1169037,Beaver%20Run|title = Feature Detail Report for: Beaver Run|accessdate = July 9, 2015}} 4. ^{{Citation|author = Montour County Planning Commission|url = https://books.google.com/books?id=bzENAQAAMAAJ&dq=%22Run.+In+the+southern+area+of+the+County%22&focus=searchwithinvolume&q=%22Beaver+Run%22+%22montour+county%22+pa|title = Montour County Natural Resources Inventory|page = 19|year = 1977|accessdate = July 10, 2015}} 5. ^{{Citation|author = Montour County Conservation District|url = http://pacd.org/webfresh/wp-content/uploads/2009/12/MontourCIP.pdf|title = Montour County Implementation Plan For The Chesapeake Bay Tributary Strategy|date = December 2009|accessdate = July 9, 2015|deadurl = yes|archiveurl = https://web.archive.org/web/20141021062501/http://pacd.org/webfresh/wp-content/uploads/2009/12/MontourCIP.pdf|archivedate = October 21, 2014|df = }} 6. ^1 {{Citation|work = Pennsylvania Bulletin|url = http://www.pabulletin.com/secure/data/vol44/44-49/2512b.html|title = Northcentral Region: Waterways & Wetlands Program Manager, 208 West Third Street, Williamsport, PA 17701, 570.327.3636|date = December 6, 2014|accessdate = July 9, 2015}} 7. ^{{Citation|url = http://www.uglybridges.com/pa/montour/|title = Montour County|accessdate = July 9, 2015}} 8. ^{{Citation|author = Pennsylvania Science Office of The Nature Conservancy|url = http://www.naturalheritage.state.pa.us/cnai_pdfs/montour%20county%20nai%202005.pdf|title = MONTOUR COUNTY NATURAL AREAS INVENTORY 2005|page = 61|year = 2005|accessdate = July 10, 2015}} 3 : Rivers of Montour County, Pennsylvania|Tributaries of Chillisquaque Creek|Rivers of Pennsylvania |
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