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Seatuck Environmental Association contracted Princeton Hydro to assess fish passage options for the dam at Mill Pond on Bellmore Creek. Project goals include increasing River Herring spawning habitat, improving the ecological condition of Bellmore Creek, maintaining and enhancing recreational values, improving site resiliency to climate change and sea level rise. River Herring have been documented at the base of the dam at Mill Pond for the past several migration seasons. Bellmore Creek is one of only two-dozen streams on Long Island where remnant runs of this ecologically valuable, diadromous fish still exist.
To provide guidance on the project, Seatuck Environmental Association assembled an advisory committee with representation from Nassau County (dam owner), New York State Office of Parks, NYS Department of Environmental Conservation, Nassau County Soil and Water District, Town of Hempstead, the South Shore Estuary Reserve, Trout Unlimited, The Nature Conservancy, South Shore Audubon, and the Bellmore Civic Association. Our project team conducted a fish passage feasibility study and outlined three options to restore fish passage a virtual meeting to the advisory team:
Princeton Hydro completed a site investigation including topographic survey, sediment probing and sampling, and assessment of structures to identify project opportunities and site constraints. Sediment sampling and analysis indicated no major concerns with contamination. Through analysis of the longitudinal profile, Princeton Hydro determined that full dam removal was not recommended due to the potential for initiating uncontrolled channel incision below original river grade into Mill Pond and upstream reaches. As the dam owner, Nassau County ultimately selected the Technical Fish Ladder as the most appropriate solution for restoring fish passage to Mill Pond and maintaining existing recreational values. Princeton Hydro is currently developing preliminary engineering design plans for this selected alternative as part of this phase of the project.
This project was funded via a NYSDEC Division of Marine Resources Grant for Tributary Restoration and Resiliency awarded to Seatuck Environmental Association in 2018.
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