USGS Water-Year Summary 2020
01383000 GREENWOOD LAKE AT AWOSTING, NJ
LOCATION - Lat 41°09'42", long 74°20'00" referenced to North American Datum of 1983, West Milford Township, Passaic County, NJ, Hydrologic Unit 02030103, in gatehouse near right end of Greenwood Lake Dam on Wanaque River at Awosting.
DRAINAGE AREA - 27.1 mi².
PERIOD OF RECORD - June 1898 to November 1903, June 1907 to current year (gage heights only prior to October 1953).
REVISED RECORDS - WDR NJ-94-1: 1993, WDR NJ-97-1: 1995-96.
GAGE - Water-stage recorder with telemetry. Datum of gage is 608.86 ft above National Geodetic Vertical Datum of 1929 (levels from New Jersey Geological Survey benchmark). Prior to Oct 1, 1931, records provided by Morris Canal and Banking Company using staff gage on former railroad bridge at site 100 ft upstream at datum 89.75 ft lower.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 9,528,000,000 gal, Oct 9-14, 1903, gage height, 14.25 ft; minimum contents, 3,160,000,000 gal, several days in November 1900, gage height, 3.50 ft.