WESTCHESTER COUNTY INFILTRATION & INFLOW REHABILITATION DESIGN
Westchester County Department of Public Works
30 Towns Throughout Westchester County
The Westchester County Infiltration and Inflow (I&I) Rehabilitation Program was part of a Consent Order Agreement between the New York State Department of Environmental Conservation (NYSDEC) and Westchester County, New York. The program was intended to reduce the amounts of I&I getting into the sanitary sewers leading to four Westchester County Wastewater Treatment Plants. The Program involved pre-design field investigation of sewers and manholes, rehabilitation design and construction administration.
Savin Engineers prepared design specifications and drawings for the following:
• Lining 350,000 linear feet of sewer, 8 to 48 inches in diameter
• Lining, waterproofing, and reconstructing 2,600 manholes
• Point repairs at 12 locations
• Ancillary repairs to streets, curbs, sidewalks, adjacent utilities, etc.
Cured-In-Place-Pipe and Fold-and-Form liners were specified for the sewer lining, depending on the size of pipe. Cementitious and epoxy waterproofing were specified for rehabilitation of leaking manholes. The ancillary repairs had to be carefully coordinated with the 30 different communities since many had their own standards. Savin provided all construction administration services during the two-year construction program.