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SURFACE-WATER RECORDS
LOCATION.--Lat 40°43'39", long 74°43'49"
referenced to North American Datum of 1983, Washington Township, Morris
County, NJ, Hydrologic Unit 02030105, on right bank 1.1 mi upstream
from bridge on County Highway 512 (Black River Road), 1.2 mi northwest
of Pottersville, and 5.5 mi upstream from Cold Brook.
DRAINAGE AREA.--32.8 mi
2.
PERIOD OF RECORD.--Continuous-record discharge station December
1921 to current year. Monthly discharges October and November 1921
published in WSP 1302. Prior to October 1952, published as "Black
River near Pottersville".
REVISED RECORDS.--WSP 741: 1932. WSP 781: Drainage area. WSP
1552: 1922, 1924-29(M), 1931(M), 1933-34(M), 1938(P), 1939(M), 1940,
1941(M), 1942-46(P), 1947(M), 1948-49(P), 1951-52(P), 1953(M). WDR
NJ-80-1: Correction 1979(P).
GAGE.--Water-stage recorder with telemetry. Concrete control
since July 1, 1937. Datum of gage is 284.14 ft above NGVD of 1929
(levels from New Jersey Geological Survey benchmark). Prior to July 1,
1922, non-recording gage on downstream side of highway bridge at
Pottersville, 1.1 mi downstream at different datum.
REMARKS.--Records good, except for estimated discharges, which
are fair. Flow occasionally regulated by ponds above station.
Discharges above 2400 ft
3/s from rating curve extension on
basis of logarithmic extrapolation.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 3,590
ft
3/s, from rating curved extended above 2400
ft
3/s on basis of logarithmic extrapolation, Sep 8, 2011,
gage height, 5.24 ft; maximum gage height, 5.94 ft, Jul 7, 1984;
minimum discharge, 1.3 ft
3/s, Oct 4, 1930.
Peak
Flood Chart
National Weather Service flood stage for
this gage is 4.5 ft.
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