Specifications include, but are not limited to: This work shall consist repairing and rehabilitating culverts and storm drain pipes by filling voids and lining the entire interior surface of the pipe with factory blended cementitious or geopolymer material. Material may be spray applied, centrifugally spin-cast or applied with hand tools. Application methods may vary based on the size and shape of the culvert. The term “host pipe” refers to the existing pipe being rehabilitated. This is applicable for pipes ranging in size from 30 inch to 120 inch diameter.; INSTALLATION PLAN: The Contractor shall submit a written installation plan for the pipe renewal to the Engineer for acceptance at least ten calendar days before beginning work. The submission shall include the following information: 1. All calculations shall be performed and signed and sealed by a registered Professional Engineer in the state of West Virginia. The design of the rehabilitation system will be required to support the dead load and live load, address the spray liner physical properties, and the provide minimum lining thicknesses. The minimum allowable thickness is 0.5 inch; where bolts are present, a minimum 0.5 inch thickness over the bolt is required. The calculated minimum finished thickness of the liner shall be based on a maximum possible crack width of 0.01 inch with a factor of safety of 2.0. Liner thicknesses do not have to be uniform.; 2. Required minimum lining thickness, invert lining thickness, and proposed manufacturer’s material.; 3. Method of cleaning the host pipe.; 4. Plan to bypass flow around the host pipe.; 5. Method to verify applied thickness during installation.; CONSTRUCTION: A. Preparation. Remove all debris and obstructions from the host pipe. Clean and prepare the surface of the host pipe according to the manufacturer’s recommendations.; B. Flow Bypass. Prevent the accumulation and flow of water through the host pipe and liner until after the work is complete. When required, bypass flows around the host pipe in accordance with the requirements of the contract documents. After the lining process begins, maintain the bypass flow until the lining process, including curing, is complete. All immediately connected manholes and inlets should be plugged to prevent water from coming through the host pipe. Comply with USACE 404 and NPDES permits if applicable.; C. Preinstallation inspection. After cleaning and before beginning the lining process, inspect the host pipe to ensure there are no obstructions that would hinder the lining process. Perform a pre-installation video survey of the host pipe and provide a copy of the video to the Engineer.; D. Installation. Measure and record the temperature and humidity. The upper limit ambient and surface temperature is 100 Degrees Fahrenheit. The lower limit is 45 Degrees Fahrenheit when ambient temperatures are expected to fall below within 72 hours of placement. Suspend work if conditions are expected to be outside the acceptable range