As you may have noticed, for several days the flow at Point of Rocks dropped below the threshold of 2,000 cfs (1293 MGD). When this occurs, daily monitoring and reporting of Potomac River flows and withdrawals are conducted by CO-OP per the Drought Operations Manual of the Water Supply Coordination Agreement. Last Friday we asked that CO-OP utilities begin sending us reports of yesterday's demand, and we will be sending out a daily summary of demands and flows. Although recent rain over the weekend has since caused the flow at Point of Rocks to increase above 2,000 cfs, we will continue daily monitoring for at least a few days. Today's summary appears below:
Daily Potomac flow and demand update (Monday 11/01/2010)
Over the last 24 hours, approximately 0.1 to 0.5 inches of rain were seen over portions of the basin. No rain is in the 48-hour forecast. However, the 5-day forecast predicates total accumulations of 0.5 to 1.75 inches of rain over most of the basin. Included in this email are the withdrawals for Friday, October 29; Saturday, October 30; and Sunday, October 31.
Daily Flows:
Little Falls gage flow 10/31: 1290 MGD (1990 cfs)
Little Falls gage flow 11/01: 1370 MGD (est., based on recently available real time data) (2120 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 10/31: 1340 MGD (2080 cfs)
Point of Rocks flow 11/01: 1310 MGD (est., based on recently available real time data) (2020 cfs)
Friday Net Potomac Production (10/29/10):
FW Corbalis raw water withdrawal (Potomac): 69 MGD
WSSC Potomac Production: 121 MGD
Aqueduct withdrawal: 145 MGD
Total Potomac demand: 335 MGD
Saturday Net Potomac Production (10/30/10):
FW Corbalis raw water withdrawal (Potomac): 80 MGD
WSSC Potomac Production: 104 MGD
Aqueduct withdrawal: 146 MGD
Total Potomac demand: 330 MGD
Sunday Net Potomac Production (10/31/10):
FW Corbalis raw water withdrawal (Potomac): 92 MGD
WSSC Potomac Production: 130 MGD
Aqueduct withdrawal: 138 MGD
Total Potomac demand: 360 MGD