PROVISIONAL DATA SUBJECT TO REVISION

LOCATION.--Lat 39°26'49", long 78°39'16", NAD 27, Hampshire County, 
        Hydrologic Unit 02070001, on left bank at highway bridge, 2.0 mi 
        east of Springfield, and at mile 13.5.
DRAINAGE AREA.--1,461 mi2.
PERIOD OF RECORD.--June 1894 to February 1896 (fragmentary); June 1899 
        to February 1902, August 1903 to July 1906, August 1928 to 
        September 2001 (measurements, daily mean discharges, and annual 
        maximums); October 2001 to September 2004 (measurements, daily 
        mean discharges, annual maximums, and discharges at one hour or 
        less intervals); October 2004 to current year (measurements, 
        daily mean discharges, annual maximums, and gage heights and 
        discharges at one hour or less intervals).
REVISED RECORDS.--WSP 1552: 1903-06, 1929-30(M), 1932-33(M), 1935(M), 
        1937-40(M), 1942-43(M), 1945(M). 
GAGE.--Water-stage recorder with satellite telemeter. Datum of gage is 
        562.02 ft above NGVD 29. June 1894 to February 1896, 
        nonrecording gage at Baltimore & Ohio Railroad bridge 11.2 mi 
        upstream at different datum. June 26, 1899, to Feb. 2, 1902, 
        nonrecording gage at bridge 10.0 mi upstream at different datum. 
        Aug. 28, 1903, to July 14, 1906, nonrecording gage at present 
        site at different datum. Aug. 8 to Sept. 24, 1928, nonrecording 
        gage at present site and datum. 
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in November 1877 reached a 
        stage of about 34 ft, from floodmarks, discharge, 140,000 ft3/s.

This gaging station is maintained in cooperation with:
        State of West Virginia