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Sunrise Highway (NY-27) Oakdale Merge Planning / Feasibility Study

As part of a Regional Design Services Agreement (RDSA), the project served to identify, evaluate, and document existing conditions and deficiencies and propose feasible conceptual alternatives to mitigate said deficiencies.

The project site experienced significant congestion and delays during peak travel periods, as motorists encountered recurring bottleneck in the eastbound and westbound approaches to Oakdale Merge.

The feasibility study described the highway facility and its role in the local and regional surface transportation network, defined existing operational issues and deficiencies, established the need for a capital construction project to reduce the issues, recommended and assessed various alternatives, and assessed the impacts of each proposed alternative.

The scope of work also included review of environmental impacts due to the site’s proximity to New York State of Department of Conservation (NYSDEC) wetlands and the Connetquot River State Park. The project required continuous coordination with the New York State Parks Department, NYSDEC, Suffolk County Department of Public Works (DPW), and the Town of Islip.

KC was responsible for developing detailed cost estimates for the alternatives identified in the feasibility study and performing HCS traffic analyses.

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Washingtonville Culvert and Drainage Improvements

The project scope includes replacement of the undersized culvert under State Route 94 in Washingtonville, NY, which is located directly east of the Ahern Boulevard and State Route 94 intersection.

KC is responsible for providing architectural and engineering design, bid phase, and construction administration and support services. The scope of work includes field and right-of-way (ROW) surveying and base mapping, preparation of highway and bridge design packages, and project management for preparation of contract documents. KC is also providing engineering consulting services, working with the Town and the New York State Department of Environmental Conservation (NYSDEC) to obtain the required permits.

During the construction phase of the project, KC will provide construction inspection services to ensure contract compliance, design intent, quality of workmanship, and material acceptance. KC will also prepare as-built drawings.

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Shoreline Protection Project

In order to satisfy the requirements of the New York State Department of Environmental Conservation (NYSDEC) State Pollutant Discharge Elimination System (SPDES) General Permit for Stormwater Discharges from Construction Activity, KC is preparing soil erosion and sediment control drawings and a Stormwater Pollution Prevention Plan (SWPPP) for the Governor's Office of Storm Recovery (GOSR). Our drawings demonstrate all soil and sediment controls to be implemented during construction to minimize the offsite discharge of pollutants.

Methods include the treatment of stormwater runoff, inlet protection, steep slope stabilization techniques, soil stockpile stabilization, and silt fences to abate air-born particulates from moving off-site. Our SWPPP provides water quality volume calculations, Stormwater Management Practices, and stormwater peak discharge offsite for both existing and proposed conditions to ensure that no net increase in runoff occurs.