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Ashokan Release Channel reactivated

The Ashokan Release Channel has been reactivated to draw Ashokan Reservoir storage toward the Conditional Seasonal Storage Objective (CSSO) now that the Mt. Marion gauge has dropped below the action stage of 18 ft.  After the shutdown during the storm event, NYCDEP will increase the Ashokan Release Channel from 0 MGD to 120 MGD (186 cfs) starting today in a series of steps.

Ashokan Reservoir storage is 97.3% today, the CSSO is 90.0%.  Turbidity of the water in the release channel is 1.7 NTU.

The Natiional Weather Service forecast for the Mount Marion gauge predicts that the stream level will continue to decrease over the next 72 hours.

Additional adjustments may be made to releases in repsonse to reservoir and weahter conditions pursuant to the Interim Release Protocol.

Coastal Storm, 12/18/23

On December 18, 2023, the water level at Saugerties (Turkey Point, Hudson River tide gauge station) peaked at 5:24 PM at 8.0′ above MLLW. This was 4′ above the normal high tide. The high water was driven by a combination of tidal surge and run-off from rainfall totals of 3.5 to 4.5 inches. By comparison, winter storm Elliot (bomb cyclone) on December 23rd, 2022, reached a slightly higher level of 8.3′ above MLLW, was primarily surge from the ocean, and unaccompanied by much precipitation. Note that the level of water in the tidal Esopus Creek when the tide is high is minimally affected by the shape or depth of the channel bottom. No matter how deep the channel is, the tide reaches an elevation established by the water surface elevation in the Hudson River.

Ashokan Releases shut down, 12/18

NYC DEP shut down the Ashokan Release Channel just after 6:00 AM this morning, December 18th. This is due to the Mt Marion USGS gage reaching 17 ft (1 ft below action stage). The flow was reduced from 309 cfs to zero. The release channel will stay closed until the Mt Marion water level falls below action stage and reservoir conditions are assessed. Ashokan Reservoir storage is currently at 90.5% with a 10.9 BG void.

Storm tide forecasted for Monday, 12/18

For Monday, December 18th, the Stevens Flood Advisory System is forecasting a storm surge of 3 to 4 feet atop the evening’s high tide, which may cause moderate flooding along low-lying waterfront properties. High tide along the tidal Esopus Creek in Saugerties will be 6:15 PM. The water level may reach or exceed the Moderate Flood Level of 7.2′ above Mean Low Low Water (MLLW). By comparison, last year’s winter storm Elliot on December 23rd, was at Major Flood Level and reached 8.3′ above MLLW. Although lower than last year’s storm tide, it will likely enter yards on Lighthouse Drive and Ferry Street in Saugerties.

Tivoli Bays South (and Saugerties)

Stevens Flood Advisory System:

To receive alerts, register for email flooding notifications from the Stevens Flood Advisory System.

Public Workshop for the Draft Stream Management Plan

December 5th, 2023

Let your voice be heard for the future of the Lower Esopus Creek!

Join Ulster County and the Lower Esopus Creek Advisory Council for a community workshop, hosted both in-person and virtually, on Tuesday, December 5 to learn more about the current conditions of the Lower Esopus Creek and hear updates about the Stream Management Plan, which is currently under development.

The workshop will be held from 6:00-8:00 PM both in-person at the Ulster County Restorative Justice Center, 733 Broadway, Kingston, NY, 12401, as well as on Zoom.

Please indicate which workshop format you plan to attend (in-person or virtual) when registering.

Walkshop, August 31st

Join Ulster County for a community walkshop—a walking workshop—at the Marbletown Town Park to discuss the Stream Management Plan for the Lower Esopus Creek. Share your thoughts and input to help shape the Plan, which will be a guide to protect and enhance the creek.

WHERE: MARBLETOWN TOWN PARK
350 Tongore Road, Kingston, NY 12401

WHEN: THURSDAY, AUGUST 31, 10:30-11:30 AM
Rain or shine
(in case of severe inclement weather the event will be held on Thursday, September 7)

Please register in advance (recommended but not required)

Public Survey for Stream Management Plan

We invite you to take a survey to help shape our community’s vision for the lower Esopus Creek. Take the online survey and offer your views on issues like recreational access, natural habitats, and educational opportunities. Ulster County and an advisory council of local organizations are collaborating on a Stream Management Plan for the Lower Esopus. Public input is an important part of the planning process. The public survey is available here: https://loweresopussmp-ulstercounty.hub.arcgis.com/pages/survey

For reference, here is an interactive map of the lower Esopus Creek: https://loweresopussmp-ulstercounty.hub.arcgis.com/datasets/ulstercounty::lower-esopus-mainstem/explore

Proposed changes to Ashokan release protocol

NYCDEP has requested a modification to the Ashokan Reservoir Interim Release Protocol (IRP).  High level changes include:

  1. the removal of the protocol to allow for Operational Releases;
  2. Modification of the Spill Mitigation Release Protocol which would require DEP to reduce the discharge to the Community Release levels should the turbidity of the Release Channel discharge meets or exceeds 20 NTU.  However, language has also been included to allow Ulster County to submit a written request to DEC and DEP for DEP to continue or restart discharge mitigation releases to achieve the void target as identified in the Conditional Seasonal Storage Objective (CSSO) when the turbidity meets or exceeds 20 NTU.

Comments can be submitted before November 2nd to:

Ken Kosinski, P.E.
Director, Bureau of Flood Protection and Dam Safety
New York State Department of Environmental Conservation
625 Broadway, Albany NY 12233

Draft Ashokan Interim Release Protocol