Macon Municipal Utilities is accepting bids to slip line approximately 40 feet of 72-inch brick sewer main, current opening is approximately 22-feet long. The intent of the project is to have new 60-inch storm pipe slip lined from the manhole upstream of the failure point to 10 feet downstream of the failure point on the 72-inch brick sewer main. The project consists of removing existing brick to the midpoint for the length required to insert 60-inch storm pipe, filling annular space upstream between slip lined pipe and failure point and 5-feet downstream from failure point with 100 psi flowable fill mortar. In the bottom 1/3 of the pipe, install a concrete invert ramp at the upstream face of the slip lined pipe using 3000 psi concrete. If any new pipe joints are exposed within the removed brick sewer area, install a pipe collar utilizing 3000 psi concrete 2-feet wide and 6-inches deep centered over the joint for the entire exposed area. Cover exposed pipe with 6-inch rock to a grade that matches existing soil surface grade. Contractor shall verify that the inside diameter of the 72-inch brick is larger than 67.1-inches prior to ordering and purchasing the 60-inch storm pipe for the repair. Questions can be directed to Mike Llewellyn at (660) 651-4784 or [email protected].
The proposed slip line pipe shall be impact modified copolymer polypropylene compound meeting the material requirements of ASTM F2881, section 5 and AASHTO M330, section 6.1. Pipe shall have a smooth interior surface and annular exterior corrugations. Joints shall be bell and spigot meeting the requirements of ASTM F2881 or AASHTO M330/ Gaskets shall meet the requirements of ASTM F477 and be watertight according to the requirements of ASTM D3212.
Note: The intent is to reuse the 60-inch storm pipe and 6-inch rock on future storm and sanitary sewer improvements, contractor shall take care during construction to minimize any damage to the slip line pipe.
Macon Municipal Utilities reserves the right to reject any or all bids.