Specifications include, but are not limited to: The City of Casper owns nine (9) miles of sanitary sewer trunk line known as the North Platte Sanitary Sewer interceptor. The line includes pipe diameters from twenty-four inch (24”), starting at 2600 Yarrow on the west end, up to fifty-four inch (54”) along Bryan Evansville Road as the pipe enters the Casper Regional Waste Water Treatment Facility. The trunk line is made of reinforced concrete pipe (RCP) that was installed in the early 1980’s and has been corroding due to hydrogen sulfide and sulfuric acid. A study completed in 2012 by CH2M Hill revealed approximately two (2) miles of the pipeline, in various segments, that need the most urgent attention and will be addressed in this project. These worst segments also include approximately three (3) sewer main connections and approximately forty-five (45) manholes. The project described in this request for proposals involves design and construction administration for rehabilitation or replacement of the critical segments of the North Platte Sanitary Sewer interceptor. All surrounding infrastructure and private property features must be taken into consideration. The project goal is to rehab or replace critical pipe sections while maintaining uninterrupted service and capacity in the system.