Sanitary Sewer Capacity Study

Project Description
A large parcel of land located within a municipal service boundary had development restrictions due to inadequate sewer capacity. The study analyzed the Municipality's trunk sanitary sewer system including ten sewage pumping stations. The analysis was based on an in-depth review of record drawings and infield house counts. The study identified capacity restraints on the existing system and assessed alternatives for the client’s land parcel.

Services Provided
Terrain Group undertook an extensive review of the Municipality’s record drawings to “build” a computer model of the trunk sanitary sewer system. Theoretical flows were then generated based on design flow rates and Inflow/Infiltration allowances. A design population count was achieved by merging actual unit counts with undeveloped subdivision plans and using standard unit density rates. The trunk sewer system has five pumping stations pumping in parallel to forcemains. These stations were computer modeled to determine minimum and maximum capacity.