POTOMAC RIVER BASIN 
01608000 SOUTH FORK SOUTH BRANCH POTOMAC RIVER NEAR MOOREFIELD, WV

Hydrograph

LOCATION.--Lat 39¥00'44", long 78¥57'23", Hardy County, Hydrologic Unit 02070001, on right bank 0.2 mi downstream from Stony Creek, 3.5 mi south of Moorefield, and at mile 6.0.

DRAINAGE AREA.--283 mi 2.

PERIOD OF RECORD.--June 1928 to September 1935, August 1938 to current year.

REVISED RECORDS.--WSP 1141: 1933(M), 1940, 1942-43, 1945, 1948(M). WSP 1302: l93l(M), l935(M).

GAGE.--Water-stage recorder. Datum of gage is 861.51 ft above sea level (U.S. Army Corps of Engineers datum). Prior to Mar. 11, 1940, nonrecording gage at Harness Ford Bridge 2.0 mi upstream at datum about 31 ft higher.

REMARKS.--Water-discharge records fair except those for estimated daily discharges (ice effect, sluggish intakes), which are poor. The flow from 92.7 mi 2 upstream from station is partially controlled, but not diverted, by several floodwater detention reservoirs with a total combined detention capacity of 19,870 acre-ft.

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1928 - 1935, 1938 - 1996, BY WATER YEAR (WY)

       OCT    NOV    DEC    JAN    FEB    MAR    APR    MAY    JUN    JUL    AUG    SEP

MEAN    130    173    207    268    324    484    408    332    167   85.3    109   93.9
MAX     776   2951    879   1267    902   1327   1787    946   1071    510    801   1340
(WY)   1977   1986   1974   1996   1994   1993   1987   1988   1949   1949   1955   1996
MIN    12.8   17.1   17.4   21.3   25.2   72.2   91.7   51.2   28.1   13.7   10.4   10.2
(WY)   1992   1932   1966   1981   1934   1981   1981   1930   1977   1966   1965   1968

SUMMARY STATISTICS WATER YEARS 1928 - 1935 1938 - 1996

 ANNUAL TOTAL                   
 ANNUAL MEAN                          231
 HIGHEST ANNUAL MEAN                  480              1996
 LOWEST ANNUAL MEAN                    85.9            1934
 HIGHEST DAILY MEAN                 28000       Nov  5 1985
 LOWEST DAILY MEAN                      4.4     Sep 10 1966
 ANNUAL SEVEN-DAY MINIMUM               5.3     Sep  5 1966
 INSTANTANEOUS PEAK FLOW        (a)110000       Nov  5 1985
 INSTANTANEOUS PEAK STAGE           (b)19.99    Nov  5 1985
 INSTANTANEOUS LOW FLOW                 4.4         (d)
 ANNUAL RUNOFF (CFSM)                    .82
 ANNUAL RUNOFF (INCHES)                11.10
 10 PERCENT EXCEEDS                   505
 50 PERCENT EXCEEDS                    96
 90 PERCENT EXCEEDS                    21


a       From rating curve extended above 39,000 ft3/s on basis of slope-area measurement of peak flow.  
b       From floodmarks.  
c       Oct. 3, 4.  
d       Sept. 10, 11, 1965, Sept. 9-11, 1966.
Excerpted from: James, R.W. , Helinsky, B.M., Simmons, R.H., and Tallman, A.J., 1996, Water Resources Data Maryland and Delaware Water Year 1996: U.S. Geological Survey, p. 222-223.