Office of the Delaware River Master
Thermal Release Request
NYSDEC is requesting a release from the 2017 FFMP Thermal Mitigation Bank due to the forecast of sunny and unusually warm conditions. The daily high water temperature at Lordville, NY is projected to exceed 75 degrees with the current conservation releases from Cannonsville and Pepacton Reservoirs. The East Branch and Neversink are also expected to approach or exceed 75 degrees at the current releases.
The estimated quantity to be debited from the bank from this pulse is 120 cfs-days.
There are 2380 cfs-days remaining in the bank before the requested pulse and there will be about 2260 cfs-days remaining after the requested pulse.
The use of the bank for the increases at Pepacton and Neversink is estimated to use an additional 150 cfs-days for the Tue-Fri period.
Neversink Reservoir Requested Ramping Schedule
June 18
| Time | Beginning Flow (cfs) |
Ending Flow (cfs) |
Loss/Gain (cfs) |
|---|---|---|---|
| 2:00PM | 135 | +20 | |
| NYSDEC requests an increased release of +20 cfs from Neversink Reservoir to a level of 135 cfs to be maintained from now through Friday at 3:00 PM | |||
Pepacton Reservoir Requested Ramping Schedule
June 18
| Time | Beginning Flow (cfs) |
Ending Flow (cfs) |
Loss/Gain (cfs) |
|---|---|---|---|
| 2:00PM | 180 | +30 | |
| NYSDEC requests an increased release of +30 cfs from Pepacton Reservoir to a level of 180 cfs to be maintained from now through Friday at 3:00 PM. | |||
Cannonsville Reservoir Requested Ramping Schedule
June 18
| Time | Beginning Flow (cfs) |
Ending Flow (cfs) |
Loss/Gain (cfs) |
|---|---|---|---|
| 9:00PM | 500 | 650 | +150 |
| 10:00PM | 650 | 800 | +150 |
| The pulse is requested to begin with a +150 cfs step-up at 9:00 PM and a +150 cfs step-up at 10:00 PM on Tuesday, June 18, 2024. A release of 800 cfs should be maintained from 10:00 PM until 6:00 AM. | |||
June 19
| Time | Beginning Flow (cfs) |
Ending Flow (cfs) |
Loss/Gain (cfs) |
|---|---|---|---|
| 6:00AM | 800 | 700 | -100 |
| 7:00AM | 700 | 600 | -100 |
| 8:00AM | 600 | 500 | -100 |
| The pulse should be gradually ended with three steps down: a -100 cfs step-down at 6:00 AM, a -100 cfs step-down at 7:00 AM, and a -100 cfs step-down at 8:00 AM on Wednesday, June 19, 2024. | |||
Requested By:
Brenan Tarrier
Professional Engineer 1, Division of Water
New York State Department of Environmental Conservation