(SIMULATED CONDITIONS AND OPERATIONS:) Natural flow in the river has continued to rise, due to the arrival today of the North Branch reservoir release, and flow at Little Falls is currently at 263 cfs (170 MGD). Because of the improvement in flow conditions, Washington Aqueduct will be shifting a portion of its withdrawal back to its Great Falls intake this afternoon.
NOTE: An ACTUAL 1,000 cfs artificially varied flow release began yesterday from Jennings Randolph and will continue until approximately 3pm today. The ACTUAL release from Little Seneca made it to Little Falls, but observation of the release at the Little Falls gage was potentially confounded by a number of factors including recent rainfall. Additional analyses will be required to fully understand the time of travel under current flow conditions.
THE FLOWS, DEMANDS, AND DISCHARGES REPORTED BELOW REFLECT ACTUAL CONDITIONS:
Daily Flows:
Little Falls gage flow 08/24: 1890 MGD (2920 cfs)
Little Falls gage flow 08/25: 1780 MGD (est., based on most recently available real time data) (2750 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 08/24: 1980 MGD (3070 cfs)
Point of Rocks flow 08/25: 2480 MGD (est., based on recently available real time data) (3830 cfs)
Today's estimated demand (08/25/13) P.M.:
WSSC P.M. estimated demand: 173 MGD
FW P.M. estimated demand: 170 MGD
Aqueduct P.M. estimated demand: 140 MGD
LW estimated demand (included in total through FW): 0 MGD
Total P.M. estimated demand: 483 MGD
Tomorrow's estimated demand (08/26/13):
WSSC estimated demand: 180 MGD
FW estimated demand: 175 MGD
Aqueduct estimated demand: 155 MGD
LW estimated demand (included in total through FW): 27 MGD
Total estimated demand: 510 MGD
SIMULATED - Recommended operations for this afternoon (08/25/13):
Fairfax Water:
Continue Occoquan production at 80 MGD.
WSSC:
Continue Patuxent production at 50 MGD.
Seneca (release date, time, amount in MGD):
Continue the simulated Seneca release rate of 40 MGD. The ACTUAL release from Little Seneca Reservoir of 125 MGD has ended.
Aqueduct:
Reduce the withdrawal from Little Falls to 125 MGD and shift the remainder to Great Falls.
North Branch Reservoirs:
Today's Luke target is 280 cfs (180 MGD).