2022 Annual Report: The Ecological Monitoring of Dam Removal Projects in the Hudson River Estuary
This document reports on the 2022 barrier-removal monitoring results within the Hudson River Estuary watershed and continues aquatic connectivity restoration efforts which began in 2016. During 2022, in-field monitoring sites included Quassaick Creek at the former Strooks Felt Dam in the City of Newburg (Orange County) and Mill Creek Dam on Mill Creek in the City of Rensselaer (Rensselaer County) [Figure 1]. During 2022, Year-2 post-removal effects were examined at Strooks Felt. The Strooks Felt dam was removed from Quassaick Creek in January of 2020. A new monitoring site was established on Mill Creek to document Year-1 pre-removal conditions at Mill Creek Dam. The Mill Creek site is unique in that, under current conditions, the lower reach below the dam is tidally influenced from the Hudson River mainstem. This results in tidal actions raising and lowering the water surface elevation within the reach between 40-50” during each tidal cycle. The continuing goal of these projects is to evaluate the effectiveness that dam removals have in restoring aquatic connectivity and improving biological and water quality metrics within their vicinity. Monitoring efforts allow project partners to understand the biological, habitat, and physical responses to dam removals and provide quantitative data to demonstrate stream improvement, while also setting realistic expectations for removal efforts in varying landscape context settings.