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    All Maryland-Delaware-District of Columbia times are reported in Eastern Standard Time (EST). To convert to Eastern Daylight Time (EDT) add 1 hour.



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    For information about dam operations, call 1-888-457-4076 or contact Exelon Energy (http://www.exeloncorp.com/)

    LOCATION.-- Lat 39°39'28.1", long 76°10'28.2", Harford County, Hydrologic Unit 02050306, 
       1.0 mi southwest of Conowingo, and 9.9 mi upstream from mouth.
    DRAINAGE AREA.--27,100 mi2
    PERIOD OF RECORD.--October 1967 to current year.
    GAGE.--Water-stage recorder.  Datum of gage is 4.16 ft above North American Vertical Datum of 1988.
    REMARKS.--Flow regulated by Conowingo Reservoir beginning October 1928, usable capacity, 55,070,000,000 gal;
       dead storage, 45,290,000,000 gal. Records do not include a small infrequent diversion upstream from station to
       augment municipal supply of city of Baltimore. Records of diversion available from Baltimore City Department
       of Public Works. U.S. Geological Survey satellite data-collection platform at station.
    EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 1,130,000 ft3/s, June 24, 1972,
       gage height, 36.83 ft; minimum discharge, 144 ft3/s, Mar. 2, 1969.
    COOPERATION.--Funding for the operation of this station is provided by the Exelon Energy Corporation,
       and the U.S Geological Survey. Access to gage site provided by Exelon Energy Corporation.
    Boating safety tips
    This station managed by the MD-DE-DC Water Science Center, Baltimore office.

    Available Parameters Period of Record
    All 3 Available Parameters for this site
    00060 Discharge(Mean) 1967-10-01  2014-08-26
    80154 Suspnd sedmnt conc(Mean) 1979-10-01  1992-09-30
    80155 Suspnd sedmnt disch(Mean) 1979-10-01  1992-09-30

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