STATION.--01470870 BLUE MARSH LAKE
LOCATION.--Lat 40`22'45", long 76`01'59", Berks County, Hydrologic Unit 02040203, at dam on Tulpehocken Creek, 0.8 mi upstream from gaging station on Tulpehocken Creek (station 01470960), 1.0 mi northeast of Blue Marsh, 1.9 mi upstream from Rebers Bridge, and 5.1 mi southeast of Bernville.
DRAINAGE AREA.--175 square miles.
PERIOD OF RECORD.--April 1979 to current year.
GAGE.--Water-stage recorder, crest-stage gage, (U.S. Army Corps of Engineers datum) and heated tipping bucket precipitation gage.
REMARKS.--Lake formed by an earthfill dam with ungated concrete spillway at elevation 307.00 ft. Storage began April 23, 1979. Capacity at elevation 307.00 ft is 50,000 acre-ft. Dead storage is 3,000 acre-ft. Lake is used for flood control, water supply, and recreation. Satellite telemetry at station.
COOPERATION.--Funding for this station provided by the U.S. Army Corps of Engineers, Philadelphia District.
EXTREMES FOR PERIOD OF RECORD.--Maximum contents, 39,480 acre-ft, Apr. 17, 1983, elevation 301.65 ft, minimum contents (after first filling), 13,150 acre-ft, Mar. 18, 1994, elevation 279.88 ft.
REMARKS.--

The 30-minute precipitation data for this station are temporary and will only be displayed for 120 days. Time series of 1-hour or cumulative daily values will NOT be available for retrieval following the 120-day display period. Although the instrumentation is calibrated at least once a year, the temporary classification means that documented routine inspections and other quality assurance measures are not performed that would make the data acceptable for archival, retrieval, or future use in general scientific or interpretive studies.