Over the past 24 hours the Potomac basin has received between 0.1 and 1 inch of rain; isolated areas in the North Branch received higher amounts closer to 2 inches. The precipitation forecast shows accumulated rainfall estimates between 1.25 and 1.5 inches of rain across the basin over the next 48 hours. ICPRB CO-OP staff will make a determination about the need to continue daily monitoring based on the actual rainfall received and the resultant flow levels. A flow measurement has been taken at Point of Rocks and we are waiting for the rating curve to be revised. At the moment flow remains below the 2,000 cfs threshold.
Daily Flows:
Little Falls gage flow 09/17: 1110 MGD (1720 cfs)
Little Falls gage flow 09/18: 1110 MGD (est., based on recently available real time data) (1720 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 09/17: 980 MGD (1520 cfs)
Point of Rocks flow 09/18: 1000 MGD (est., based on recently available real time data) (1540 cfs)
Net Potomac Production (09/17/12):
FW Corbalis raw water withdrawal (Potomac): 108 MGD
WSSC Potomac Production: 119 MGD
Aqueduct withdrawal: 149 MGD
Total Potomac demand: 376 MGD