Monitoring Reports

During periods of drought, the Cooperative Water Supply Operations on the Potomac (CO-OP) helps manage the Washington metropolitan area water supply system by coordinating withdrawals from the Potomac River and off-river reservoirs and recommending releases from upstream reservoirs when forecasted flow in the river is not sufficient to meet expected needs. These needs include water demands and an environmental flow-by of 100 million gallons per day (MGD) on the Potomac River at Little Falls dam near Washington, D.C.

Afternoon Potomac flow and demand update (Wednesday 09/22/2010)

Submitted by admin1 on Wed, 09/22/2010 - 14:00

The weather forecast and operational recommendations remain the same.

Daily Flows:
Little Falls gage flow 09/21: 620 MGD (970 cfs)
Little Falls gage flow 09/22: 620 MGD (est., based on most
recently available real time data) (955 cfs)
Note: Gage flow at Little Falls is measured after water
supply withdrawals.
Point of Rocks flow 09/21: 940 MGD (1450 cfs)
Point of Rocks flow 09/22: 890 MGD (est., based on recently
available real time data) (1380 cfs)

Afternoon Potomac flow and demand update (Tuesday 09/21/2010)

Submitted by admin1 on Tue, 09/21/2010 - 14:00

The weather forecast and operational recommendations remain the same
as this morning.

Daily Flows:
Little Falls gage flow 09/20: 660 MGD (1020 cfs)
Little Falls gage flow 09/21: 600 MGD (est., based on most
recently available real time data) (923 cfs)
Note: Gage flow at Little Falls is measured after water
supply withdrawals.
Point of Rocks flow 09/20: 930 MGD (1440 cfs)
Point of Rocks flow 09/21: 960 MGD (est., based on recently
available real time data) (1480 cfs)

Afternoon Potomac flow and demand update (Sunday 09/19/2010)

Submitted by admin1 on Sun, 09/19/2010 - 14:00

Weather conditions and operational recommendations remain the same as
this morning.

Daily Flows:
Little Falls gage flow 09/18: 640 MGD (990 cfs)
Little Falls gage flow 09/19: 680 MGD (est., based on most
recently available real time data) (1050 cfs)
Note: Gage flow at Little Falls is measured after water
supply withdrawals.
Point of Rocks flow 09/18: 990 MGD (1530 cfs)
Point of Rocks flow 09/19: 940 MGD (est., based on recently
available real time data) (1460 cfs)

Afternoon Potomac flow and demand update (Saturday 09/18/2010)

Submitted by admin1 on Sat, 09/18/2010 - 14:00

Weather conditions and operational recommendations remain the same as this morning.

Daily Flows:
Little Falls gage flow 09/17: 500 MGD (780 cfs)
Little Falls gage flow 09/18: 620 MGD (est., based on most recently available real time data) (955 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 09/17: 940 MGD (1450 cfs)
Point of Rocks flow 09/18: 1010 MGD (est., based on recently available real time data) (1560 cfs)

Afternoon Potomac flow and demand update (Friday 09/17/2010)

Submitted by admin1 on Fri, 09/17/2010 - 14:00

Weather conditions and operational recommendations remain the same as this morning.

Daily Flows:
Little Falls gage flow 09/16: 440 MGD (680 cfs)
Little Falls gage flow 09/17: 490 MGD (est., based on most recently available real time data) (759 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 09/16: 810 MGD (1260 cfs)
Point of Rocks flow 09/17: 940 MGD (est., based on recently available real time data) (1460 cfs)

Afternoon Potomac flow and demand update (Thursday 09/16/2010)

Submitted by admin1 on Thu, 09/16/2010 - 14:00

Weather conditions and operational recommendations remain the same as
this morning.

Daily Flows:
Little Falls gage flow 09/15: 470 MGD (720 cfs)
Little Falls gage flow 09/16: 350 MGD (est., based on most
recently available real time data) (548 cfs)
Note: Gage flow at Little Falls is measured after water
supply withdrawals.
Point of Rocks flow 09/15: 720 MGD (1110 cfs)
Point of Rocks flow 09/16: 810 MGD (est., based on recently
available real time data) (1250 cfs)

Afternoon Potomac flow and demand update (Wednesday 09/15/2010)

Submitted by admin1 on Wed, 09/15/2010 - 14:00

There has been no change in weather conditions. Operational
recommendations remain the same as in this morning's update.

Daily Flows:
Little Falls gage flow 09/14: 490 MGD (760 cfs)
Little Falls gage flow 09/15: 380 MGD (est., based on most
recently available real time data) (593 cfs)
Note: Gage flow at Little Falls is measured after water
supply withdrawals.
Point of Rocks flow 09/14: 740 MGD (1140 cfs)
Point of Rocks flow 09/15: 720 MGD (est., based on recently
available real time data) (1120 cfs)