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USGS Water-Year Summary 2024
01381000 ROCKAWAY RIVER BELOW RESERVOIR, AT BOONTON, NJ
LOCATION - Lat 40°53'49", long 74°23'41" referenced to North American Datum of 1983, Boonton Town, Morris County, NJ, Hydrologic Unit 02030103, on right bank 2,000 ft downstream from Boonton Reservoir Dam at Boonton, and 0.4 mi upstream from bridge on Greenbank Road.
DRAINAGE AREA - 119 mi².
REVISIONS HISTORY - WSP 1902: 1951-54. WDR NJ-79-1: 1949(M), 1952(M), 1968(M), 1970-74(M), 1977(M). WDR US-2010: 2009 Sewage effluent. On June 1, 2020 peak streamflow for the 2017 water year was revised.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Gage-height only, March 1903 to February 1904. Monthly discharges only, November 1911 to May 1912 and November 1912 to December 1912. Continuous-record discharge station, January 1906 to October 1911, June 1912 to October 1912, and January 1913 to current year. Published as "near Boonton" 1903-1904, and as "at Boonton" 1906-1937.
GAGE - Water-stage recorder with telemetry. Concrete control since Nov. 5, 1936. Datum of gage is 195.68 ft above NGVD of 1929 (levels from New Jersey Geological Survey benchmark). Mar. 15, 1903 to Feb. 2, 1904, non-recording gage at site 1.9 mi downstream at different datum. Jan. 1, 1906 to Mar. 2, 1918, non-recording gage on Boonton Reservoir Dam 2,000 ft upstream at datum 305.25 ft above NGVD of 1929 (levels from New Jersey Geological Survey benchmark). Records for Mar. 3, 1918 to Sept. 30, 1924 are based on a recording gage at present site operated by Jersey City Water Department and staff gage readings at Boonton Reservoir Dam by Jersey City Water Department.
REMARKS - Records good, except for estimated discharges, which are fair. Records represent flow in river only. Sewage effluent enters river about 600 ft below station. Flow regulated by Boonton Reservoir (see 01380900) 2,000 ft upstream from station, and by Splitrock Reservoir 16.5 mi above station. Water diverted from Boonton Reservoir for municipal supply of Jersey City.
EXTREMES OUTSIDE PERIOD OF RECORD - The flood of Oct 10, 1903 had a maximum daily mean flow of 7,560 ft³/s with a daily mean gage height of 7.8 ft, site and datum then in use.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 7,390 ft³/s, Aug 28, 2011, gage height, 9.73 ft; minimum discharge, no flow Oct 10, 1903, and part or all of many days 1904 to current.
