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Crab Run (Mahanoy Creek)

Crab Run
Crab Run looking downstream.JPG
Crab Run looking downstream
Basin features
Main source Barry Township, Schuylkill County, Pennsylvania, not far from the census-designated place of Beruys Lake
897 ft (273 m)
River mouth Mahanoy Creek in Barry Township, Schuylkill County, Pennsylvania near Taylorville
742 ft (226 m)
40°44′56″N 76°23′22″W / 40.74880°N 76.38936°W / 40.74880; -76.38936Coordinates: 40°44′56″N 76°23′22″W / 40.74880°N 76.38936°W / 40.74880; -76.38936
Progression Mahanoy Creek → Susquehanna RiverChesapeake Bay
Basin size 3.50 sq mi (9.1 km2)
Tributaries
  • Left:
    one unnamed tributary
  • Right:
    one unnamed tributary
Physical characteristics
Length 2.5 mi (4.0 km)
Discharge
  • Average rate:
    (August 2001) 0.61 cu ft/s (0.017 m3/s)

Crab Run is a tributary of Mahanoy Creek in Schuylkill County, Pennsylvania, in the United States. It is approximately 2.5 miles (4.0 km) long and flows through Barry Township. The watershed of the stream has an area of 3.50 square miles (9.1 km2). Despite being listed as impaired by abandoned mine drainage, the stream is not impacted by this; no mining has been done in its watershed. However, some stream reaches in its watershed do experience agricultural impacts. The stream is not far from the Western Middle Anthracite Field. Its watershed is designated as a Coldwater Fishery and a Migratory Fishery. As of 2001, the stream contains macroinvertebrates, but no fish.

Crab Run begins in Barry Township, not far from the census-designated place of Beurys Lake. It flows west-northwest for several tenths of a mile and passes through a pond or small lake before turning north-northeast. After several tenths of a mile, the stream receives an unnamed tributary from the and turns northeast. Several tenths of a mile further downstream, it receives an unnamed tributary from the and turns north-northwest for a few tenths of a mile, flowing alongside the base of a mountain. The stream then turns north-northeast for a short distance, passing through a pond or small lake before reaching its confluence with Mahanoy Creek.

Crab Run joins Mahanoy Creek 32.08 miles (51.63 km) upstream of its mouth.

Some stream reaches in the watershed of Crab Run are not designated as impaired waterbodies. One stream reach is listed as impaired by metals from abandoned mine drainage, but no mining has been done in the watershed. Another stream reach is impaired by siltation/organic enrichment/low dissolved oxygen from agriculture/grazing.

In August 2001, the discharge of Crab Run was measured to be 0.61 cubic feet per second (0.017 m3/s). The pH was 7.1 and the net alkalinity concentration was 32 milligrams per liter (0.032 oz/cu ft). The concentration of aluminum was 0.01 milligrams per liter (1.00×10−5 oz/cu ft) and the manganese and iron concentrations were 0.05 and 0.15 milligrams per liter (5.0×10−5 and 0.000150 oz/cu ft). The nitrate concentration was 3.3 milligrams per liter (0.0033 oz/cu ft), the phosphorus concentration was 0.08 milligrams per liter (8.0×10−5 oz/cu ft), and the sulfate concentration was 9 milligrams per liter (0.0090 oz/cu ft).


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