Office of the Delaware River Master

Thermal Release Request

Today’s NWS forecast for Hancock is mostly sunny with an expected high of 93F. Binghamton is expected to be 94F and mostly sunny. Tomorrow’s expected high air temperature in Hancock is 90F with mostly sunny skies preceded by an overnight low of 68F. Binghamton’s forecast for Wednesday is 89F and partly sunny preceded by a low of 71F.

The high water temperature at the USGS Lordville gage will exceed 75F today.

The current Cannonsville release is 550 cfs due to yesterday’s request from the Thermal Release Bank.

Due to the potential for elevated water temperatures, NYSDEC requests an increase in the Cannonsville Reservoir release to 700 cfs starting at 4:00 PM June 29th until 3:59 AM June 30th, then a return to 500 cfs starting at 4:00 AM June 30th. The approximate debit from the thermal mitigation bank for this increase is about 140 cfs-days.

Due to the potential of continued elevated water temperatures on the Neversink River, NYSDEC also requests a continuation of the enhancement at Neversink of 20 cfs to be made from 4:00 PM Tuesday through 3:59 PM Wednesday. No additional relief on the East Branch is anticipated to be needed, so the release at Pepacton should be returned to 150 cfs at 4:00 PM Tuesday.

Thank you for your continued assistance in implementing the thermal protection bank.

Cannonsville Reservoir Requested Ramping Schedule

June 29

Time Beginning Flow
(cfs)
Ending Flow
(cfs)
Loss/Gain
(cfs)
4:00PM 550 700 +150
The increase should be made in one step of 150 cfs at 4:00 PM on Tuesday.

June 30

Time Beginning Flow
(cfs)
Ending Flow
(cfs)
Loss/Gain
(cfs)
4:00AM 700 625 -75
5:00AM 625 550 -75
6:00AM 550 500 -50
The decrease should be made in three steps of 75 cfs, 75 cfs, and 50 cfs at 4:00 AM, 5:00 AM, and 6:00 AM Wednesday.

Requested By:

Brenan Tarrier

Professional Engineer 1, Division of Water

New York State Department of Environmental Conservation