PROVISIONAL DATA SUBJECT TO REVISION

LOCATION.--Lat 39°42'58.5", long 77°36'23.9", Hydrologic Unit 02070004,  Washington County, on right bank 100 ft upstream 
   from highway bridge at Rocky Forge, 0.4 mi downstream from Pennsylvania-Maryland State line, 0.7 mi downstream from confluence of 
   west and east branches, 1.9 mi northeast of Leitersburg, MD, 2.5 southwest of Waynesboro, PA and 36.6 mi upstream from mouth.
DRAINAGE AREA.--93.5 mi2.
PERIOD OF RECORD.-- May 1948 to September 1951, October 1965 to September 1981, June 2005 to current year.
GAGE.--Water-stage recorder and concrete control.  Datum of gage 536.15 feet above National American Vertical
   Datum of 1988.
REMARKS.--U.S. Geological Survey satellite collection platform at station. Small fluctuations in flow do to batch discharges
   from the Washington Borough Sewage Treatment Plant, upstream from gage, on East Branch of Antietam Creek.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 5,430 ft3/s, June. 22, 1972,
   gage height, 12.33 ft (At previous datum); minimum discharge, 11.0 ft3/s, Jan 30, 1966.
COOPERATION.--Funding for the operation of this station is provided by the Pennsylvania Department of Environmental Protection 
   and the U.S. Geological Survey.