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Estimated flood stage is 19 feet.
When heavy rain is forecast, gates in the dam are often opened to prevent flooding. This results in a sharp reduction of lake levels before a storm, and rises in lake levels after the storm. USGS records are corrected for this gate flow before publication.
LOCATION. --Lat 40°23'22", long 74°23'26" referenced to North American Datum of 1983, Spotswood Borough, Middlesex County, NJ, Hydrologic Unit 02030105, on right bank upstream of DeVoe Lake Dam in Spotswood, 0.1 mi upstream from Cedar Brook, and 0.6 mi upstream from confluence with Matchaponix Brook.
DRAINAGE AREA. --40.7 mi2.
PERIOD OF RECORD. --January 1957 to current year.
GAGE. --Water-stage recorder above concrete dam. Datum of gage is NGVD of 1929 (levels by Duhernal Water System). January 1957 to September 1966 at datum 17.72 ft higher. Flow through gates in the dam not included in real-time data, but are included in historic flow data. Gates are sometimes opened when heavy rains are expected.
COOPERATION. --Funding for this gage is provided by the New Jersey Department of Environmental Protection, and the U.S. Geological Survey.
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Value Oct 2