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.
Funding for this site is provided by:
SURFACE-WATER RECORDS
LOCATION.--Lat 40°59'57", long 73°59'21"
referenced to North American Datum of 1983, River Vale Township, Bergen
County, NJ, Hydrologic Unit 02030103, on upstream right bank at bridge
on Westwood Avenue in Rivervale, 1.5 mi upstream from Pascack Brook,
4.1 mi downstream of Lake Tappan, and 4.6 mi upstream from Oradell
Dam.
DRAINAGE AREA.--58 mi².
PERIOD OF RECORD.--October 1941 to current year.
REVISIONS HISTORY.--WDR NJ-80-1: 1968-79(M). On April
03, 2020 discharge and peak gage height for April 16, 2018 were
revised.
GAGE.--Water-stage recorder with telemetry, crest-stage gage,
and concrete control. Datum of gage is 22.51 ft above NGVD of
1929.
REMARKS.--Records fair, except for estimated discharges, which
are poor. Flow regulated by DeForest Lake (since 1956) and Lake Tappan
(since 1965, see 01376950). Diversions from DeForest Lake and
Hackensack River at West Nyack, NY, for municipal water supply.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 4,660 ft³/s,
Aug 28, 2011, gage height, 12.26 ft; minimum discharge, 0.0 ft³/s, Jan
16, 1970, affected by regulation from upstream.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1962, 1964 to current year.
REMARKS.--Discrete water-quality data were collected as part of
the
New Jersey Ambient Surface-Water-Quality Monitoring Network.
Peak
Flood Chart
National Weather Service flood stage for this
gage is 5.5 ft.
Reservoir releases from Lake Tappan are
included in the flow at this gage.
