Governor`s Office of Storm Recovery Mastic Beach Drainage Improvements CR12 General Construction

Improve the ability of several existing drainage systems within the Mastic Beach area to manage storm-water runoff and prevent backflow of seawater into the systems. Drainage systems are located along existing roadways within mainly residential areas. Topographically, the project sites are generally flat, and groundwater was found to be within 2 feet of existing grade at all project locations except Neighborhood Road (DS-24). Contractor staging and storage areas will be coordinated with the Town of Brookhaven. The Contractor is responsible for obtaining dewatering permits. Coordination with utility companies for facility relocation and protection is anticipated in most project areas. Drainage improvements are proposed at eight different project locations in the Mastic Beach area. The specific project areas and the improvements proposed at each location are as follows: Maywood Drive (DS-12): Remove and replace the existing drainage system. Re-size and adjust pipe invert elevations to improve system conveyance capacity. Restore pavement to match existing conditions. Hickory Road to Huntington Drive (DS-13): Remove and replace the existing drainage system. Resize and adjust pipe invert elevations to improve system conveyance capacity. Install check valve prior to outfall into downstream waterbody. Restore disturbed wetland area. Repair existing timber bulkhead. Neighborhood Road (DS-24): Remove and replace the existing drainage system. Re-size and adjust pipe invert elevations to improve system conveyance capacity. Install water quality treatment device prior to discharge into downstream water body. Restore pavement, sidewalk and curb to match existing conditions. Curb ramps to be replaced will be installed to meet ADA requirements. Add Alternate 1: Gooseberry Road (DS-11): Remove and replace the existing drainage system. Re-size and adjust pipe invert elevations to improve system conveyance capacity. Install pipe outlet with flared end section and rock outlet protection. Restore pavement to match existing conditions. Construct wetland mitigation area. Add Alternate 2: Riviera Drive (DS-14, DS-15 and DS-16): Remove and replace portions of existing drainage systems at multiple locations on Riviera Drive. Re-size and adjust pipe invert elevations to improve system conveyance capacity. Install check valve prior to outfall into downstream waterbody. Restore pavement to match existing conditions. Floral Court (DS-17): Remove and replace existing catch basin with a larger drainage structure. Install check valve prior to outfall into downstream waterbody. Restore pavement to match existing conditions.

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities, Ponds and Reservoirs.
Division 35 -	Waterway and Marine Construction, Shoreline Protection, Waterway Construction and Equipment.