Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins
Click to hide state-specific text


USGS 01463740 Shabakunk C at Sylva Lake Dam at Ewingville NJ


Click to hidestation-specific text
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:



LOCATION.--Lat 40°16'16", long 74°46'24" referenced to North American Datum of 1983, Ewing Township, Mercer County, NJ, Hydrologic Unit 02040105, on upstream left bank of dam at outlet of Sylva Lake, on the campus of The College of New Jersey, 0.3 mi downstream from the outlet of Ceva Lake, 0.4 mi downstream of bridge on Ewingville Road, and 0.6 mi southeast of Ewingville.
DRAINAGE AREA.--3.99 mi2.
PERIOD OF RECORD.--Continuous-record discharge station, November 2008 to current year.
GAGE.--Water-stage and precipitation recorder with telemetry and crest-stage gage. Datum of gage is 86 ft NAVD of 1988.
REMARKS.--Records fair, except for estimated discharges, which are poor. Discharges above 1,100 ft3/s from rating curve extension on basis flow-over-dam computation of peak flow.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 2,040 ft3/s, from rating curve extended above 1,100 ft3/s on basis of flow-over-dam computation of peak flow, Aug 22, 2009, gage height, 6.30 ft; minimum discharge, 0.00 ft3/s, many days.
EXTREMES OUTSIDE PERIOD OF RECORD.--The flood of July 21, 1975 reached a stage of 95.3 ft above NGVD of 1929, from flood marks, discharge of 5,550 ft3/s computed by a combination of flow-over-dam and flow-over-embankment computations. The flood of Aug 28, 1971 reached a stage of 94.2 ft above NGVD of 1929.

Peak Flood Chart

Gage Photo Rain gage data is available from this location at this link

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
All 2 Available Parameters for this site
00060 Discharge 2008-11-13  2018-02-23
00065 Gage height 2008-11-12  2018-02-23

Graph w/ stats
Graph w/o stats
Graph w/ (up to 3) parms
Days  (7)

  -- or --
Begin date

End date

Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second

Most recent instantaneous value: 6.21 02-23-2018   08:30 EST
Graph of  Discharge, cubic feet per second

Add up to 2 more sites and replot for "Discharge, cubic feet per second"

 Add site numbers

Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert      

Daily discharge, cubic feet per second -- statistics for Feb 23 based on 9 years of record more
Median Most Recent
Value Feb 23
Mean 75th
1.70 2.1 3.4 6.21 11 20 44.4

Gage height, feet

Most recent instantaneous value: 2.82 02-23-2018   08:30 EST
Graph of  Gage height, feet

Add up to 2 more sites and replot for "Gage height, feet"

 Add site numbers

Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert