The existing sewage collection system in the City of Grants Pass is comprised of 23 separate drainage basins and a total of about 0.8 million feet of sewer pipelines ranging in size from 4 inches to 42 inches in diameter. Approximately one-half of these sewers are at least 50 years old, with most of the old pipes clustered in the downtown area.
The Pine Street Sewer project consisted of installing 4,270 feet of new 18-inch diameter sanitary sewer pipe and service laterals and 1,900 feet of new 21-inch diameter sanitary sewer pipe and service laterals in a residential portion of Grants Pass, Ore.
The scope of work also included reconstruction of the streets where the sewers are installed, including an entirely new street asphalt surface from curb to curb within the project area and a new properly compacted road subbase. The project also included one 100-foot long bore beneath the Central Oregon and Pacific Railroad right-of-way crossing, and new twin 12-inch diameter sewer pipes within an existing culvert which contained a steelhead spawning stream.
Additionally, the project included installation of 2,250 feet of 12-inch diameter perforated storm drainage pipe for groundwater collection and discharge, installation of 19 new commercial driveway approaches in each of the alleys within the project area, 2,084 feet of new curb and gutter, 10 new wheelchair ramps, and 835 feet of new sidewalk.