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SURFACE-WATER RECORDS
LOCATION.--Lat 41°18'33", long 74°47'43"
referenced to North American Datum of 1983, Dingman Township, Pike
County, PA, Hydrologic Unit 02040104, on right bank 1,500 ft upstream
from toll bridge (on U.S. Route 206) between Montague, NJ and Milford,
PA, 0.8 mi downstream from Sawkill Creek, and at river mile
246.3.
DRAINAGE AREA.--3,480 mi
2.
PERIOD OF RECORD.--March 1936 to September 1939 (gage heights
only, published as "at Milford, PA"). October 1939 to current
year.
REVISED RECORDS.--WDR NJ-81-2: 1980.
GAGE.--Water-stage recorder with telemetry. Datum of gage is
369.93 ft above NGVD of 1929. Prior to Feb 9, 1940, non-recording gage
on upstream side of left span of subsequently dismantled bridge at
present site at datum 70 ft lower.
REMARKS.--Records good, except for estimated discharges, which
are fair. Diurnal fluctuation at medium and low flow caused by
hydroelectric plants on tributary streams. Flow regulated by Lake
Wallenpaupack, Cliff Lake, and by Pepacton, Cannonsville, Swinging
Bridge, Toronto, and Neversink Reservoirs. Discharges above 105,000
ft
3/s from rating curve extension on basis of flood-routing
study.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 250,000
ft
3/s, from rating curve extended above 105,000
ft
3/s on basis of flood-routing study, Aug 19, 1955, gage
height, 35.15 ft; minimum discharge, 382 ft
3/s, Aug 24,
1954.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Oct 10, 1903
reached a stage of 31.1 ft (from high-water mark), discharge, 217,000
ft
3/s.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1956-73, 1976-78, 1991 to August
2009 (discontinued).
REMARKS.--Cooperative Network Site Descriptor: Delaware River
Main Stem, New Jersey Department of Environmental Protection Watershed
Management Area 1. The samples on Mar 10 and May 27 included volatile
organic compound and filtered pesticide assessments,
respectively.
COOPERATION.--Physical measurements and samples for laboratory
analyses were provided by personnel of the NJ Department of
Environmental Protection. Determinations of dissolved ammonia,
dissolved orthophosphate, and suspended residue were performed by the
NJ Department of Health and Senior Services, Environmental and Chemical
Laboratory.
Peak
Flood Chart
National Weather Service flood stage for
this gage is 25 ft.
