USGS Water-Year Summary 2023

01377450 WOODCLIFF LAKE AT HILLSDALE, NJ

LOCATION - Lat 41°00'46", long 74°02'57" referenced to North American Datum of 1983, Hillsdale Borough, Bergen County, NJ, Hydrologic Unit 02030103, at Woodcliff Lake Dam on Pascack Brook, 0.7 mi north of Hillsdale, and 1.5 mi north of Westwood.

DRAINAGE AREA - 19.4 mi².

REVISIONS HISTORY - WDR NJ-88-1: Capacity, WDR NJ-99-1: 1998 (elevation, contents).

SURFACE-WATER RECORDS

PERIOD OF RECORD - Lake elevation and contents, water years 1929 to current year. Annual maximum, water years 1998 to current year. Prior to October 2007, month-end elevation and contents provided by Veolia Water (formerly SUEZ). Annual minimum, October 2007 to current year.

GAGE - Water-stage recorder with telemetry and crest-stage gage. Datum of gage is 0.00 ft above NGVD of 1929 (levels by United Water New Jersey).

REMARKS - Reservoir is formed by earthfill dam, completed about 1905. The dam was modified in 1984, which increased capacity, 871,000,000 gal, elevation, 95.00 ft at top of Bascule gates. Flow is regulated by two Bascule gates 85-ft long and 6-ft high each and one 24-inch ball valve. Water is released for diversion at New Milford (diversion discontinued May 1990) and Oradell Reservoir at Haworth by Veolia Water, for municipal supply. Annual extremes beginning in water year 2014 can be obtained by using this link. Prior to water year 2014, annual extremes can be obtained on the respective annual water year summary.

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 973,000,000 gal, Apr 16, 2007, gage height 96.8 ft; Minimum contents recorded, 46,800,000 gal, Sep 4, 2014, gage height, 74.05 ft; minimum contents observed from survey provided by Untied Water New Jersey (now Veolia water), 26,000,000 gal, Aug 29, 2014, gage height, 72.50 ft, although contents may have been lower during period of dam construction Aug 27 – Sep 4, 2014.