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Notice - The USGS Water Resources Mission Area's priority is to maintain the safety and well-being of our communities, including providing critical situational awareness in times of flooding in all 50 U.S. states and additional territories. Our hydrologic monitoring stations continue to send data in near real-time to NWISWeb, and we are continuing critical water monitoring activities to protect life and property on a case-by-case basis. The health and safety of the public and our employees are our highest priorities, and we continue to follow guidance from the White House, the CDC, and state and local authorities.
LOCATION.--Lat 39°07'41.1", long 77°20'08.8", Montgomery County, Hydrologic Unit 02070008, on right bank at bridge on State Highway 28, 150 ft downstream from mouth of Great Seneca Creek, 0.5 mi east of Dawsonville, and 5.8 mi upstream from mouth. DRAINAGE AREA.--101 mi2. PERIOD OF RECORD.--September 1930 to current year. REVISIONS HISTORY.--WSP 726: Drainage area. WSP 1232: 1930. WSP 1272: 1933. WSP 1432: 1934-35(M), 1941(M). WDR MD-DE-74-1: 1970(M), WDR MD-DE-DC-03-1: 2002(M). GAGE.--Water-stage recorder and crest-stage gage. Concrete control since March 3, 1934. Datum of gage is 213.31 ft above North American Vertical Datum of 1988. Sept. 26 to Nov. 9, 1930, chain gage, and Nov. 10, 1930 to Apr. 6, 1934, water-stage recorder, at highway bridge 60 ft upstream at same gage datum. REMARKS.--Small diversion at times for irrigation upstream from station. U.S. Geological Survey satellite data-collection platform at station. Water-quality records for some prior periods have been collected at this location. EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 26,100 ft3/s, June 22, 1972, gage height, 16.40 ft; minimum discharge, 1.7 ft3/s, Sept. 28, 29, 1930. COOPERATION.--Funding for the operation of this station is provided by the Interstate Commission on the Potomac River Basin, and the U.S. Geological Survey.
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