During winter months, cold and ice may result in inaccurate real-time lake or reservoir elevation data. Adjustments or deletions of this data can only be done after detailed analysis.

 

SURFACE-WATER RECORDS
LOCATION.--Lat 40°57'23", long 74°01'46" referenced to North American Datum of 1983, Oradell Borough, Bergen County, NJ, Hydrologic Unit 02030103, at dam on Hackensack River at Oradell, 0.8 mi upstream of Hirshfeld Brook, and 2.2 mi west of Haworth.
DRAINAGE AREA.--113 mi².
PERIOD OF RECORD.--Water years 2011 to current year. From October 1923 to October 2010, month-end elevation and contents were provided by United Water New Jersey.
REVISIONS HISTORY.--WDR NJ-84-1: Spillway elevation, WDR NJ-89-1: Capacity, WDR NJ-99-1: 1998 (elevation, contents).
GAGE.--Water-stage recorder with telemetry. Datum of gage is NGVD of 1929.
COOPERATION.--United Water New Jersey.
REMARKS.--Reservoir is formed by hollow concrete dam, completed in 1922. Capacity at spillway level, 3,507,000,000 gal, elevation, 23.16 ft. Flow regulated by seven sluice gates (7 by 9 ft). Prior to May 1990, water was released for diversion by United Water New Jersey, 0.6 mi downstream from dam for municipal supply. Water is presently diverted from Oradell Reservoir at Haworth by Suez, formerly United Water New Jersey, 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, 4,450,000,000 gal, Aug 28, 2011, elevation, 26.30 ft; minimum contents, 1,338,000,000 gal, Nov 20, 2017, elevation, 13.72 ft.