Dark Run
| Dark Run | |
|---|---|
Dark Run looking upstream near Ringtown
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| Basin features | |
| Main source | Union Township, Schuylkill County, Pennsylvania near Pattersonville 1,160 to 1,180 feet (350 to 360 m) |
| River mouth | Catawissa Creek in Union Township, Schuylkill County, Pennsylvania 843 ft (257 m) 40°52′56″N 76°12′23″W / 40.88217°N 76.20651°WCoordinates: 40°52′56″N 76°12′23″W / 40.88217°N 76.20651°W |
| Progression | Catawissa Creek → Susquehanna River → Chesapeake Bay |
| Basin size | 4.55 sq mi (11.8 km2) |
| Tributaries |
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| Physical characteristics | |
| Length | 4.3 mi (6.9 km) |
Dark Run is a tributary of Catawissa Creek in Schuylkill County, Pennsylvania, in the United States. It is approximately 4.3 miles (6.9 km) long and flows through Union Township. The watershed of the stream has an area of 4.55 square miles (11.8 km2). The stream is considered to be a High-Quality Coldwater Fishery and Class D Wild Trout Waters. Eight species of fish inhabit the stream. The main rock formations in the stream's watershed are the Mauch Chunk Formation and the main soil is the Leck Kill soil. The stream has several unnamed tributaries.
Dark Run begins in Union Township, a few tenths of a mile west of the community of Pattersonville. The stream flows north for several tenths of a mile, passing through a pond. It eventually turns east and passes through another pond before turning northeast. After some distance, the stream receives two unnamed tributaries and turns north-northeast, cutting through a ridge. On the other side of the ridge, it receives another unnamed tributary and passes through the southeastern corner of Ringtown before returning to Union Township. The stream continues north-northeast and receives another unnamed tributary before cutting through another ridge. It then meanders northeast for approximately a mile until it reaches its confluence with Catawissa Creek on the border between Union Township and East Union Township.
Dark Run joins Catawissa Creek 24.83 miles (39.96 km) upstream of its mouth.
Dark Run has no named tributaries. However, it has several unnamed tributaries. "Trib 27590 to Dark Run" is the first unnamed tributary to enter the stream. It is followed closely by "Trib 27589 to Dark Run". "Trib 27588 to Dark Run" and "Trib 27587 to Dark Run" join the stream east of Ringtown. "Trib 27586 to Dark Run" joins it not far from its mouth.
Dark Run, along with Little Catawissa Creek, contributes relatively fertile water to Catawissa Creek. However, the stream is affected by agricultural runoff.
The pH of Dark Run 2.66 miles (4.28 km) upstream of its mouth is 7.0 and the concentration of alkalinity at this location is 16 milligrams per liter. The pH of the stream 1.71 miles (2.75 km) upstream of its mouth is 7.4 and the concentration of alkalinity is 28 milligrams per liter. The water hardness of the stream 2.66 miles (4.28 km) upstream of its mouth is 34 milligrams per liter.
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Wikipedia