In 1997 the Peconic Estuary Partnership Habitat Restoration Workgroup was formed and charged with identifying important Peconic natural habitats with enhancement or restoration potential, developing overall habitat restoration goals, and identifying and prioritizing potential restoration projects. The end product was the “Habitat Restoration Plan for the Peconic Estuary” dated December 2000. This Habitat Restoration Plan was subsequently updated in 2009, in 2017 and again in 2020. Over the years, the Peconic Estuary Partnership has completed projects to restore a variety of habitat types, including beaches/dunes, grasslands, diadromous fish habitat, eelgrass, and wetlands.
Peconic Estuary Partnership 2020 Habitat Restoration Plan
View Habitat Restoration Project Map
This project is based in partnership between PEP, The Nature Conservancy, The Town and Trustees of East Hampton as well as the regional group of experts, Salt Marsh Adaptation & Resiliency Teams, or SMARTeams. Over the past decade, SMARTeam members have piloted new techniques to address hydrologic dysfunction found within landscapes of marshlands of the North Atlantic Region.
Since 2016 Suffolk County Vector Control has been engaged with the Town of East Hampton, The Nature Conservancy, and several other community members to reduce the spraying of pesticides by removal of mosquito larvae in the Accabonac marsh complex. This community’s mosquito breeding program saved money, time, and pesticide exposure, and increased transparency between vector control and the community. This program’s data and Vector Control’s priorities are at the center of this design as the restoration approach strives to return the natural rise and fall of the tides, ushering in healthy native marsh vegetation to reduce the number of mosquito-breeding hotspot areas.
PEP and Suffolk County Health Services are currently leading the next phase of design and permitting. This is an opportunity for Accabonac Harbor to be exemplary in pushing forward the development of new and novel restoration approaches in order to combat sea level rise. The regional group, SMARTeams, has developed these methods which introduce an alternative to traditional high disturbance restoration.
The Woodhull Dam is the next major barrier to fish passage on the Little River. Providing permanent fish passage at Woodhull Dam will create access to 95 acres of prime spawning habitat within Wildwood Lake. Wildwood Lake is located within preserved lands and would provide high quality, protected habitat. Funding for the construction of the dam was awarded to Suffolk County Parks/PEP through a NYSDEC Water Quality Improvement Project (WQIP) Grant, the Suffolk County Water Quality Protection and Restoration Program (WQPRP) grant and the United States Fish and Wildlife Service (USFWS). The project includes the construction and installation of a combination Denil pass and step pool fish passage and eel passage through the dam bypassing the existing culvert, with a video monitoring and fish counter system.
Click here to Learn about PEP’s Progress in Diadromous Fish Habitat Restoration. See below for the fish and eel passage design: 
The Upper Mills Dam is the next major barrier to fish passage on the main stem of the Peconic River. In addition to the dam, USGS maintains a concrete weir two-hundred and fifty (250) feet downstream of the dam in order to measure the stage and discharge of the Peconic River, which also impedes fish passage. A feasibility and alternative analysis for fish passage at the Upper Mills Dam was completed in 2011. PEP is currently contracting with L.K. Mclean Associates P.C. to complete the engineering design and permitting services for construction of a fish passage at the Upper Mills Dam and Weir. This project will open 40 acres of historic spawning and maturation habitat for diadromous fish. The fish passage engineering design and permitting work is expected to be complete in August 2021.
Click here to Learn about PEP’s Progress in Diadromous Fish Habitat Restoration. PEP is currently developing engineering designs for selected design alternative below: 
Peconic Estuary Partnership is working with Cornell Cooperative Extension of Suffolk County to complete a demonstration living shoreline project at the Suffolk County Marine Environmental Learning Center (SCMELC) in Southold, NY. The project incorporates smooth cordgrass and ribbed mussels and will be evaluated to determine its ability to provide storm resilience and coastal habitat, but also the shoreline’s effectiveness in reducing nitrogen and pathogen inputs to the Peconic Estuary. The project is expected to be complete in August 2021. See here for the SCMELC Living Shoreline project page.
In 2019 PEP completed a conceptual design, with Land Use Ecological Services, Inc., for the priority habitat restoration project at Meetinghouse Creek, Riverhead, NY. Click here for the Meetinghouse Creek Wetland Restoration/ Construction Conceptual Design Plan.
This site is located at a large wetland area that forms the headwaters to Meetinghouse Creek in Riverhead, NY. Meetinghouse Creek is listed as an impaired waterbody on the NYSDEC Priority Waterbodies List. The wetland vegetation at this site is dominated by Phragmites.
The conceptual design recommendation is to construct a 1.2-acre stormwater wetland to treat stormwater runoff in the 5.6 acre contributing watershed. This will improve water quality in the downstream wetland and surface waters. Additionally, it will greatly increase the ecological quality of the habitat and improve plant and wildlife diversity.
PEP is working through NEIWPCC to complete Engineering Design and Permitting for the habitat restoration project. PEP will work with our contractors, Interfluve and Land Use Ecological Services, Inc., and Town of Riverhead to complete the Engineering Design and Permitting services, which are anticipated to be complete December 2022.
In 2019 PEP completed a conceptual design, with Land Use Ecological Services, Inc., for the priority habitat restoration project at Narrow River Road, Southold, NY. Click here for the Narrow River Road Wetland Restoration Conceptual Design Plan.
Narrow River is a tributary of the Peconic Bay and flows south from the Town’s Whitcom Marsh Preserve under Route 25 and along the eastern side of Narrow River Rd in Orient, NY. An earthen dam was constructed after the 1938 hurricane to prevent tidal flooding of the lands north of the dam. The westernmost section of the dam blocked the tidal flow from Narrow River to the large meadow area north of the dam known as Broad Meadows and Whitcom Marsh Preserve north of Route 25.
Remediation of the culvert and earthen dam is needed to improve the tidal exchange throughout the extent of the river and increase the salinity of the river to promote the re-establishment of native vegetation and important waterfowl and wading bird habitat. The potential extent of the restoration area is 80 acres. PEP is working with partners to secure funding for engineering design plans and construction.
In 2019 PEP completed a conceptual design, with Land Use Ecological Services, Inc., for the priority habitat restoration project at Lake Montauk, East Hampton NY. Click here for the East Hampton: Lake Montauk Alewife Access and Habitat Enhancement Conceptual Design Plan.
The goal of the conceptual habitat restoration design plan is to restore connectivity for diadromous fish species between Lake Montauk and Big Reed Pond by replacing an undersized culvert, and between Lake Montauk and Stepping Stones Pond by replacing an undersized, impassable culverts under Old West Lake Drive and removing debris.
Suffolk County Capital funds have been secured to replace the culvert that leads to Big Reed Pond and PEP staff will be working with Suffolk County parks to complete the permitting and construction. PEP staff are also working with partners to secure funding to complete engineering design plan and construction of the culvert leading to Stepping Stones Pond.
PEP worked with Peconic Land Trust and Cornell Cooperative Extension (CCE) of Suffolk County to create a living shoreline on Peconic Land Trust's Widow's Hole Preserve in Greenport, NY. This is the first living shoreline project to be completed in the Peconic Estuary. It will be monitored to assess its efficacy in providing storm resilience and coastal habitat, and the changes in elevation of the shoreline over time to identify loss/gain of sand and the growth of smooth cordgrass (Spartina alterniflora) and America beachgrass (Ammophila) Click here to view the project story: Widow’s Hole Preserve Story Map.
Phase II of the project scope, extending the living shoreline to the entire Widows Hole Preserve property, has been developed by CCE and added to the PEP Habitat Restoration Plan.
Paul Stoutenburgh Preserve is a Town owned 52 acre nature preserve on the west side of Arshamomaque Pond with an adjacent 7 acre County owned preserve, Arshamomaque Preserve. Several areas along the shoreline and interior have pockets of invasive Phragmites australis resulting in low quality wetlands. Invasive mile-a-minute weed has become established and is rapidly increasing in areas adjacent to tidal and fresh water wetland areas. The project site was nominated by the Town of Southold to be included in the Peconic Estuary Program Habitat Restoration Plan in 2013 and the project was prioritized for habitat restoration in 2016. Habitat restoration is recommended and is anticipated to involve the removal of the invasive species using currently accepted removal and restoration practices, and changes to drainage infrastructure in the area to make conditions less suitable for invasive vegetation.
The goal of the project is to improve the freshwater and tidal wetland habitat and to promote the re-establishment of native vegetation and important waterfowl, shorebird, wading bird and migratory bird habitat. An RFP for Engineering Design and Permitting will be advertised when Suffolk County Capital Budget funding is made available, or if external grant funding is awarded.
The decline of eelgrass (Zostera marina L.) in the Peconic Estuary over the last 70 years has contributed to the degradation of the estuary as a whole. The PEP has undertaken several initiatives to advance the protection and management of eelgrass in the Peconic Estuary. Since its inception, the PEP has supported a Long Term Eelgrass Monitoring Program conducted by Cornell Cooperative Extension’s Marine Program. This monitoring program, has focused on collecting data pertaining to the health of the eelgrass beds at various sites throughout the Peconic Estuary. PEP also conducted aerial surveys of eelgrass in 2014 to map and identify changes in the extent of the resource over time. In 2009, an Eelgrass Management Plan was adopted to provide a nesting ground for discussion, theories, and new actions necessary to minimize impacts to eelgrass and to provide a suitable environment for eelgrass to exist.
Search here for PEP Long-Term Eelgrass Monitoring Reports and other eelgrass reports
Below are the most recent Long-Term Eelgrass Monitoring Reports:
Peconic Estuary Program 2019 Long-Term Eelgrass Monitoring Program Report
Peconic Estuary Program 2018 Long Term-Term Eelgrass Monitoring Program Report
The Seagrass Bio-optical Model has been developed in cooperation with The Research Foundation of SUNY Stony Brook to provide site specific information on what areas of the Peconic Estuary provide suitable habitat for eelgrass to guide future eelgrass protection and restoration projects. This project will lead to a better understanding of specific light and temperature requirements for eelgrass in the Peconic Estuary (PE). This is the critical next step towards understanding the threats to the eelgrass community and where restoration projects have the best probability of success. The final report is linked below:
Living on the edge- Analysis of Zostera marina and the potential for restoration in Peconic Bay (Long Island, NY) (2020)
The Seagrass Restoration Map and Tool will be posted here when available to share the results with our stakeholders.
Click here for the presentation on the final Seagrass Bio-Optical Model: Living on the edge- analysis of Z. marina and potential for restoration- Kaitlyn O'Toole (2020).
The PEP is working with the NYSDEC and SUNY Stony Brook to analyze spatial and temporal trends in the Peconic Estuary finfish trawl survey dataset, and develop risk metrics from ecological relationships for the Peconic Estuary that examine whether local and regional environmental changes have increased the vulnerability of individual finfish and mobile invertebrate species, community assemblages, and ecosystem processes.
The ECOSIM is a quantitative modeling framework that can represent all major ecosystem functional groups and can be used to identify and assess structural changes in the ecosystem in response to environmental change. The proposed study will identify vulnerable species, critical habitats, and ecosystem properties within the Peconic Estuary. This information has direct application to decisions affecting the use, management, and conservation of the natural resources in the bay.
A SUNY Stony Brook is advertising for a post-doctoral position currently to complete the work. The expected completion period is March 2023.
The status and trends of living resources are closely related to the amount of land preserved in the Peconic Estuary. Benefits to land protection include preserving unique species and natural communities, and controlling nutrient and pollution loads to the Estuary. In addition, the public has exhibited a strong attachment to the natural resources and amenities provided by the Peconic Estuary region. The Peconic Estuary Partnership developed a 2004 Critical Lands Protection Strategy (CLPS) that outlined land still available for development that also meet certain criteria used to determine land protection priorities. The Partnership shares this information with State and local agencies so that it can be used to make land acquisition decisions. Since 2006, approximately 2,443 acres of land have been protected in the Peconic Estuary watershed. The most significant source of funding for land protection is the Community Preservation Fund (CPF), administered by the five East End towns. This funding is supplemented by County and State governments, and not-for-profit organizations (especially The Nature Conservancy and the Peconic Land Trust). 
In 2019 the Critical Lands Protection Strategy was updated to continue protecting land for habitat and water quality protection, adaptation to sea level rise and groundwater protection. PEP worked with Anchor QEA, LLC. to re-evaluate the original prioritization of the Critical Lands Protection Strategy (CLPS) and the lands within the watershed were evaluation and prioritized considering climate change impacts. The 2019 Critical Lands Protection Strategy is included here in the 2019 Peconic Estuary Partnership Climate Vulnerability Assessment and Action Plan.
See here for the interactive Climate-based Critical Lands Protection Strategy and Ranking Tool Story Map!
The Peconic Estuary Partnership will be sharing this information with the municipalities within the Peconic Estuary watershed over the course 2020 and 2021.
With the help of GIS interns, PEP is completing a GIS mapping project to quantify the amount of hardened shoreline in the Estuary. The last survey was in Peconic Estuary Hardened Shoreline Mapping Report was completed in 2003. A final report of the recent study will be circulated when complete. 
An eelgrass disease epidemic along the Atlantic seaboard in the 1930s and a series of harmful algal blooms in the Peconic Estuary in the 1980s and 1990s were major factors in the loss of eelgrass habitat. Globally, seagrasses have decreased dramatically in the last few decades, and climate change is believed to play a major role. Warmer water temperatures stress eelgrass and may render historical locations of eelgrass beds no longer suitable for eelgrass growth.
Long-term monitoring in the Peconic Estuary indicates that water temperatures in the western section of the estuary no longer fall within the optimal range for eelgrass. Rising sea level is another important climate-related threat to eelgrass survival in locations where seawalls and other types of shoreline hardening make it impossible for eelgrass beds to shift landward to remain in a favorable water depth. In addition, nutrient enrichment, algal blooms, water quality, boating and fishing practices, and shoreline stabilization structures are all collectively threatening the health and extent of eelgrass. The picture shows a boat propeller harming an eelgrass bed.
Over the last decade eelgrass restoration has been attempted at multiple sites within the Peconic Estuary with limited success. A further understanding of suitable environmental conditions for eelgrass growth is needed to better inform eelgrass protection and restoration efforts. 
Additionally, in some cases, natural or man-made barriers—such as seawalls and other hardened shoreline structures—will prevent marshes for migrating inland. Another significant reason for the loss of native high marsh communities in the Peconic is the invasion of the common reed, Phragmites australis. An 88.5 percent increase in Phragmites australis was recorded in the Peconic between 1974 and 2005. Tidal wetland loss means reduced feeding, breeding, and nursery habitats for waterfowl, wading birds, shorebirds, fish, and invertebrates. It also means a reduction in important ecosystem services, such as sediment retention, nutrient and organic matter recycling, and storm and flood buffering. 
In the late 1800s and early 1900s, dams were built on nearly all of Long Island’s freshwater tributaries for grist mills, cranberry bogs, and other industrial uses, and as property line demarcations. These dams cut off historic migratory routes for diadromous fish, notably river herring and American eels, blocking access to hundreds of acres of habitat. Other physical structures such as road culverts can also block access to freshwater habitats. River herring and American eel populations have declined over the past century, in part due to this loss of freshwater habitat. The decline of these diadromous fish has negative impacts on the health of the Peconic Estuary ecosystem. The movement of diadromous fish from salt to fresh water is especially important in transferring ocean-derived energy into estuarine, freshwater, and upland habitats. River herring and American eel also provide prey for countless species during their annual migration.
The Peconic Estuary Partnership has been working with its partners to restore historic access to freshwater habitat for diadromous fish by installing fish passage structures that allow fish to go around or over the dam, and replacing undersized road culverts with larger, fish-friendly culverts.
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