Specifications include, but are not limited to: Pipe: Pipe needs to be 72 LF of Double 48” Round CL III reinforced concrete. Culvert pipe (120 LF total) with flared end sections on each end. Installation: Pipe shall be installed on uniform grade (.005) bearing on native material (NO OVERDIGGING). Pipe shall be rubber gasket joint, and each joint shall have an 18” wide strip of filter fabric secured around it. Backfill: Select native material shall be utilized as backfill Backfill must be compacted to 94% standard proctor. A 6” layer of limestone shall be placed both before and after the pipe crossing for the full width of the roadway. Certificate of Liability and Workers’ Comp must be included with each submitted bid. These certificates must be presented to HCDC each contractual year, prior to expiration. These Certificates may not be necessary for sale only bids.