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

 

SURFACE-WATER RECORDS
LOCATION.--Lat 41°07'38", long 74°15'57" referenced to North American Datum of 1983, Ringwood Borough, Passaic County, NJ, Hydrologic Unit 02030103, on right bank 500 ft upstream from Wanaque Reservoir, 0.7 mi downstream from Ringwood Mill Pond dam, and 6.5 mi north of Wanaque.
DRAINAGE AREA.--17.9 mi², (revised)
PERIOD OF RECORD.--October 1934 to September 1978, October 1985 to current year. Monthly discharge only for some periods, published in WSP 1302.
REVISED RECORDS.--WDR NJ-82-1: 1935-77(P). WDR US-09-1: 1949, 1957, 1961, 1972(M), 1973(M), 1974. WDR US-10-01: Drainage area.
GAGE.--Water-stage recorder with telemetry, crest-stage gage, and concrete control. Datum of gage is 292.67 ft above NGVD of 1929 (levels by New Jersey Geological Survey). Prior to Sep 30, 1978, at datum 10.0 ft higher.
COOPERATION.--Gage-height record collected in cooperation with North Jersey District Water Supply Commission.
REMARKS.--Records fair, except for estimated discharges, which are poor. Records given herein include flow over spillway and through ports in dam when open or through waste gate in dam. No flow through ports this year. Currently there is leakage through the waste gate and it is included in flow. Flow occasionally regulated by Ringwood Mill Pond, Sterling, and Sterling Forest Lakes, and several smaller lakes above station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 2,430 ft³/s, Aug 28, 2011, gage height, 14.02 ft; minimum discharge, 0.0 ft³/s, occurred on many days just after waste gate was closed and water was below intake ports.

WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1959 to 1971, 1974, 1978, and 2013 to 2014.
REMARKS.--Discrete water-quality data were collected as part of the New Jersey Ambient Surface Water Quality Monitoring Network.

Peak Flood Chart