Office of the Delaware River Master

Thermal Release Request

On behalf of the New York State Department of Environmental Conservation, we request an enhanced release from Cannonsville Reservoir for the purpose of thermal mitigation in the mainstem Delaware River in accordance with the 2017 Flexible Flow Management Program.

Natural runoff has been decreasing since 6/11. The forecast for today is warm and mostly sunny. Tomorrow is expected to be warm and partly sunny. Light precipitation is possible with a chance of thunderstorms throughout with a greater likelihood tomorrow. Tomorrow’s high water temperature at Lordville, NY has the potential to be above 75 OF especially if the observed temperatures are warmer than forecast, if there is no precipitation, or if cloud cover is less than expected.

Cannonsville Reservoir Requested Ramping Schedule

June 21

Time Beginning Flow
(cfs)
Ending Flow
(cfs)
Loss/Gain
(cfs)
4:00 PM 460 550 +90
The ramp-up and ramp-down may be made in one step each. About 2,385 cfs-days remain in the FFMP2017 Thermal Mitigation Bank at the time of this request. No directed release is expected for the Montague Flow Objective.

June 22

Time Beginning Flow
(cfs)
Ending Flow
(cfs)
Loss/Gain
(cfs)
4:00 AM 550 460 -90
4:00 PM 460 700 +240
The ramp-up should be two steps beginning at 3:00 PM.

June 23

Time Beginning Flow
(cfs)
Ending Flow
(cfs)
Loss/Gain
(cfs)
4:00 AM 700 460 -240
Ramp-down should be three steps beginning at 4:00 AM.

Requested By:

Brenan Tarrier

Professional Engineer 1, Division of Water

New York State Department of Environmental Conservation