Halesite Park

Project Overview

The project will restore and improve marine habitats by removing structures and fill, planting salt marsh and high vegetation, and installing natural stone. This “Living Shoreline” approach was selected because site conditions meet the criteria for success. The site has a gradual shoreline; is subject to low to moderate level wave energy; has ‘bio-benchmark’ patches of saltmarsh today; and is municipally owned and will be actively maintained going forward. The removal of the solid core pier will restore ~1,500 sq ft of subtidal and intertidal habitat. The removal of the ~150 LF concrete seawall will allow for 600 sq ft of saltmarsh plantings in its footprint and currently non-vegetated intertidal areas will be planted with saltmarsh vegetation enhancing a total of 3,050 sq ft of saltmarsh and another 600 sq ft of maritime grassland/shrubland.

To address stormwater-induced shoreline erosion, a bioswale and bio-infiltration basin will be created to detain and treat stormwater coming into the site. The swale and basin will be planted with native vegetation , creating another 4,800 sq ft of aquatic habitat.

Because of the disturbed conditions along the existing seawall, there are areas that are dominated by undesirable vegetation, including mugwort. These species will be actively removed and the area regraded to allow for regular tidal inundation which will support the expanded native salt marsh vegetation.

Huntington Harbor (1702-0228) is listed as impaired for pathogens. Pathogens sources include animal waste from domestic pets, waterfowl, and urban wildlife. Stormwater carries these wastes, which also contain nitrogen, and flows into Huntington Harbor. Failing septic systems carry pathogens and nitrogen. Stormwater from East Shore Road enters Halesite Park. Properties north of and upgradient of the park are unsewered and rely on septic systems. The effluent from those systems is part of the groundwater discharge to Huntington Harbor. The proposed improvements (grassed swales and high marsh plantings) will help capture the pathogens and nitrogen carried by stormwater prior to its discharge to the harbor. The tidal wetland plantings will absorb nitrogen from the stormwater as well as from groundwater discharge and harbor waters. The project will capture the nutrients that contribute to the algal blooms that depress Huntington Harbor dissolved oxygen. The new tidal wetland plantings will consume carbon dioxide and generate dissolved oxygen.

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