Following this morning's operations request by ICPRB CO-OP, WSSC Water initiated a SIMULATED water supply release from the Little Seneca Reservoir at 9:30 AM. This reservoir is located in the Black Hill Regional Park.
In talking with Fairfax Water distribution staff this morning, we learned that the maximum possible SIMULATED load shift today from the Potomac to the Occoquan is 5 MGD due to ACTUAL installation work at the Griffith plant.
We look forward to hearing from those participating in the Drought Coordination Technical Committee Call hosted by MWCOG on MS Teams this afternoon at 4:00 PM.
Best regards,
ICPRB CO-OP Drought Team
ACTUAL Daily flows:
Little Falls gage flow 2022-11-14: 8725 MGD (13500 cfs)
Little Falls gage flow 2022-11-15: 9113 MGD (est., based on recently available real-time data) (14100 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2022-11-14: 10276 MGD (15900 cfs)
Point of Rocks flow 2022-11-15: 7820 MGD (est., based on recently available real-time data) (12100 cfs)
ACTUAL Today's estimated production* (2022-11-15):
FW estimated production:117 MGD
WSSC estimated production:146 MGD
Washington Aqueduct estimated production:119 MGD
Total estimated production:382 MGD
LW total estimated consumption:20 MGD**
*Based on CO-OP daily demand forecasting models. FW includes the LW purchase and excludes Falls Church. Washington Aqueduct includes Falls Church
**LW total estimated consumption includes purchase and production water and is not included in the total production estimate.
ACTUAL Tomorrow's estimated production* (2022-11-16):
FW estimated production:125 MGD
WSSC estimated production:147 MGD
Washington Aqueduct estimated production:119 MGD
Total estimated production:391 MGD
LW Total estimated consumption:21 MGD**
*Based on CO-OP daily demand forecasting models. FW includes the LW purchase and excludes Falls Church. Washington Aqueduct includes Falls Church
**LW total estimated consumption includes purchase and production water and is not included in the total production estimate.
SIMULATED Recommended operations for today (DREX Day 1 P.M.):
SIMULATED Fairfax Water:
Maintain the 5 MGD load shift from the Potomac to the Occoquan, keeping Potomac withdrawals steady.
Griffith production per operational preference.
SIMULATED WSSC Water:
Per operational preference, keeping Potomac withdrawals steady.
SIMULATED Little Seneca (release date, time, amount in MGD):
Maintain the Little Seneca release of 19 MGD.
SIMULATED Washington Aqueduct:
Meet all demands from Little Falls in order to maintain the Great Falls flowby.
SIMULATED North Branch Reservoirs P.M. Summary:
No North Branch releases at the moment.
Note: Flow levels have dropped to a level that has triggered enhanced monitoring, per the drought operations manual of the Water Supply Coordination Agreement. When adjusted flow at Little Falls (adjusted flow is gage flow plus upstream withdrawals) less the environmental flow is less than twice the Washington metropolitan area withdrawals, the water suppliers will begin reporting yesterday's and today's withdrawals and this morning's reservoir storage volumes. ICPRB asks that communications be sent by 7:30 am and updates sent by 1:00 pm. Reporting can be submitted through www.icprbcoop.org, by email to coop@icprb.org, or by telephone by leaving a message with the CO-OP operations number at 301-274-8132. Monitoring emails can be viewed at http://icprbcoop.org/products/monitoring-reports. Thank you for your contribution to the monitoring efforts.