The control for this site is undergoing modification beginning February 24, 2022. The monitored pool will partially recede and the recorded stage will be lower than historic values. The computed discharge will not be available until sufficient field data is gathered to re-establish a new stage-discharge relationship.
STATION.--01472199 WEST BRANCH PERKIOMEN CREEK AT HILLEGASS, PA
LOCATION.--Lat 40`22'26", long 75`31'22", Montgomery County, Hydrologic Unit 02040203, on left bank 0.3 mi downstream from bridge on private road, and 0.5 mi north of Hillegass.
DRAINAGE AREA.--23.0 square miles.
PERIOD OF RECORD.--October 1981 to current year. Prior to October 1992, published as "Northwest Branch".
GAGE.--Water-stage recorder and crest-stage gage. Prior to February 24, 2022, gage included broad-crested concrete control. Datum of gage is 290.00 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at station.
COOPERATION.--Funding for the operation of this station is provided by the Delaware River Basin Commission.
GAGE HEIGHTS OF IMPORTANCE.-
Supplied by USGS: Maximum recordable gage height (stage sensor operational limit) - 13.2 ft; Data transmitter operational limit - 17.2 ft;
Supplied by NWS: Action stage-4 ft; Flood stage-5 ft; Moderate flood stage-6 ft; Major flood stage-8 ft.