Genesee River at Wellsville, NY

Site ID: WLLN6

County: Allegany

Ownership: USGS

NWS Hydrologic Service Area: WFO BUF

Gage is located on the left bank 35 feet upstream from a concrete weir at Wellsville, 0.5 miles upstream from bridge on State Highway 17, 0.6 miles upstream from Crowner Brook and sewage treatment plant, 0.6 miles downstream from Dyke Creek, and 140.9 miles upstream from the mouth.

USGS 1:24000 map: Wellsville North

Latitude: 42° 07' 20"

Longitude: 77° 57' 27"

Basin area: 288 Sq. Mi.

Gage Datum: 1470.00 ft msl

Record stage: 20.7 ft on 23 June 1972

and flow: 38500 cfs (134 CSM)

Dams upstream: None

Dams downstream: None

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Mean monthly flow (x 1000cfs) and CSM (1973 - 1993)

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

Flow

.33 .77 .60 .61 .15 .85 1.9 .25 .08 .03 .03 .09

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CSM

1.1 2.7 2.1 2.1 .52 3.0 6.7 .87 .27 .10 .10 .30


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Annual 389 cfs/ 1.4 CSM
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