named programs · 5 · from sources
What they call their work
Aquatic Infrastructure Development
Designs and permits fish ladders, culvert replacements, and deep-water piers to improve ecological access and educational opportunities on the Hudson River.
Community Outreach and Education
Engages communities through field trips, village fairs, stream cleanups, and interpretive signage to promote stewardship of local waterways.
Fish Population Studies
Documents fish species in urban streams, studies eel migration, and monitors river herring to support ecological restoration and public awareness.
Sprout Brook Dam Removal
Engineering, permitting, and planned demolition of the Sprout Brook dam to restore fish migration and natural stream flow into the Hudson River.
Water Quality Monitoring
Conducts bacterial and nutrient testing at Hudson River beaches in Ossining and Sleepy Hollow, including Microbial Source Tracking to identify sewage contamination sources.
activities · 5 groups
What they do
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Watershed Conservation & Stewardship 2 activities
- Restoring fish passage through dam removal and fish ladder projectsImplements dam removal projects, including the Sprout Brook and Pelham Dams, and secures grants for fish ladder feasibility studies and installations to restore aquatic connectivity in regional streams.
- Supporting municipal stream and waterfront improvement projectsProvides technical and planning services to municipalities for stream cleanup, water quality compliance, aesthetic enhancement, and recreational access improvements, including engineering design and permitting support, while minimizing local financial burden through grant partnerships.
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Lake and River Advocacy 1 activity
- Advancing local policy for fish passage and stream connectivityInitiated and supported passage of local legislation in Ossining, NY requiring fish-passable culverts and dams in Class A, B, and C streams, establishing the first such law in New York State.
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Wildlife Monitoring and Field Research 1 activity
- Conducting ecological research on fish, wildlife, and waterwaysResearches fish species diversity, eel migration patterns, and ecological health in Hudson Valley waterways, including documenting nine fish species in the Sing Sing Kill where only one was previously known and studying eel migration in the Hutchinson and Saw Mill Rivers.
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Lake and Watershed Monitoring & Assessment 1 activity
- Monitoring and improving water quality in Hudson Valley waterwaysConducts comprehensive water quality monitoring, microbial source tracking, and phased investigations at public beaches and tributaries—including Louis Engel Park, Sing Sing Kill, Pocantico River, and Kingsland Point—to identify pollution sources and support mitigation planning, supported by NYSDEC grants and Clean Water Act settlement funding.
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Uncategorized 1 activity
- Developing educational waterfront infrastructure and public programsCompleted a six-year design and permitting process for a deep water pier in Ossining to host educational tall ships and installs interpretive signage at stream sites to support public education and stewardship.
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financials · form 990EZ · fy2024
revenue
Total revenue$53K
Contributions & grants$53K100%
Program service revenue——
Investment income——
Other revenue—
expenses
Total expenses$106K
Program expenses—
Admin / overhead—
Fundraising—
Salaries & benefits—
Grants paid out—
balance sheet
Total assets$3K
Cash—
Investments—
Liabilities—
Net assets$-78K
3 years on record · 2022–2024 · YoY revenue -23.1%
leadership · form 990 part vii · fy2024
Who runs it
board members · 6
- DAVID POST — BOARD MEMBER
- GAVIN HOUGHAM PHD — BOARD MEMBER
- GEORGE KRAEMER PHD — BOARD MEMBER
- JOHN LADD — BOARD MEMBER
- JOHN WALDMAN PHD — BOARD MEMBER
- MARY MARGARET MINNIS PHD — BOARD MEMBER
relationships · 16
Who they work with
- Guidestar Network — Profile listed on Guidestar with transparency seals.
- Hudson River Foundation Funder — Funder supporting water quality, fish diversity, and public education projects through the Hudson River Improvement Fund.
- Municipalities Partner — Collaborates with municipal governments to implement dam removal and fish passage improvement projects.
- New York State Department of Environmental Conservation Government — Awarded a 2025 stewardship grant through the Hudson Estuary Program to study sewage sources affecting the Ossining town beach.
- New York State Department of Environmental Conservation Government — Government agency contracting with HVSC for water quality monitoring and stewardship planning under multiple grant programs.
- New York State Department of Environmental Conservation Government — Permitting agency and potential funder for the Sprout Brook dam removal project
- New York State Department of Environmental Conservation Government — Provided grants supporting fish studies and dam removal projects.
- Queens College Partner — Collaborated on research to measure, weigh, and tag eels in the Hutchinson and Saw Mill Rivers.
- Riverkeeper Partner — Collaborates with Dan Shapley, Water Quality Program Director at Riverkeeper, who serves on the HVSC Advisory Board.
- Riverkeeper Partner — Partner organization whose Clean Water Act lawsuit settlement provides funding for Environmental Benefit Projects implemented by HVSC.
- Scenic Hudson Partner — Partner organization collaborating on the Sprout Brook Dam Removal project.
- Town of Ossining Partner — Provided lab fee grants for water quality testing and collaborated on efforts to open the Louis Engel Waterfront Park beach for swimming.
- U.S. Army Corps of Engineers Government — Permitting agency for the Sprout Brook dam removal project
- Westchester Partner — Partnered to remove the Pelham Dam on the Hutchinson River under a NYS DEC grant.
- Wildlife Conservation Society Partner — Collaborated on research to measure, weigh, and tag eels in the Hutchinson and Saw Mill Rivers.
- Zone Websites Partner — Website design and development partner
strategies · 5
How they approach the work
Named approaches extracted from this org’s sources. Where others share an approach, follow it to see the full set of orgs running it.
- Biodiversity Documentation for Public Engagementmethodology: biodiversity documentation for conservation engagementBy documenting fish biodiversity in urban streams, we increase public appreciation and support for conservation, because visible evidence of ecological life fosters emotional connection and stewardship behavior.
- Community-Engaged Ecosystem Restorationmethodology: community-engaged stream restorationBy restoring streams through community-involved processes, we increase local ecological awareness and stewardship, because engagement with local waterways fosters lasting environmental responsibility and strengthens community ties to place.
- Ecosystem-Based Restoration with Co-Benefitsmethodology: ecological and community co-benefit restorationBy restoring streams and removing barriers like obsolete dams, we improve ecological integrity and enable sustainable human uses such as recreation and economic development, because integrated ecological and social design produces resilient, multi-benefit outcomes.
- Leveraged Municipal Partnerships for Restorationmethodology: grant-leveraged municipal partnershipsBy partnering with municipalities and leveraging grant funding, we achieve ecological restoration goals at low cost to local governments, because reducing financial barriers increases public sector buy-in and project scalability.
- Science-Driven Pollution Mitigationmethodology: phased-environmental-assessmentBy using water quality monitoring and Microbial Source Tracking, we identify and address pollution sources to enable safe public access to beaches and rivers, because targeted, data-informed interventions are more effective than generalized cleanup efforts.