Sanitary Sewer Design
Allegany State Park’s Red House Area: Sanitary Sewer System Rehabilitation
THE PROJECT
The New York State Office of Parks, Recreation and Historic Preservation (NYSOPRHP) wanted to prevent inflow and infiltration in a 50-year-old sanitary system that serves campsites and cottages. The system is comprised of more than 125 manholes and 27,000 linear feet of pipe under a natural, pristine 2,800-acre park in southwestern New York state.
Erdman Anthony was retained under a term agreement to investigate the existing system and then design a rehabilitation.
FEATURES/SOLUTIONS
The existing system plans were reviewed, and a detailed site inspection was completed to review the entirety of the existing system. The site inspection included a review of each of the +125 manholes in the system. The existing mapping and GIS coordinates provided by NYSOPRHP were also reviewed and this data was combined with existing aerial imagery to create the mapping that was utilized as a base map for the design.
Next, a subcontractor was engaged to capture video of the entire system to locate any segments where repairs, in addition to pipe relining, would be needed. In addition to checking every inch and every manhole, the system’s seven lift stations were also investigated.
Final plans and technical specifications were created that called for the lining of the entire system, as well as manhole and lift station rehabilitation.
IMPACTS
Erdman Anthony recommended solutions, developed cost estimates, created design documents, and compiled the final plans for the documents that NYSOPRHP would use to bid the work.
The entire system was rehabilitated by using cast-in-place lining, which was far more cost effective and far less disruptive to the landscape.