Specifications include, but are not limited to: Use sand bedding conforming to the sieve size requirements for fine aggregate specified in Subsection 706.03.03 or the sieve size requirements for granular backfill specified in Subsection 704.03.11 with an additional requirement of 100 percent passing the 9.5 mm (3/8 in.) sieve. Perform directional drilling required for the installation of conduit at locations shown on the plans or as approved and as follows: Perform directional drilling with a drill head that will accommodate the number of conduits in that section. When drilling, utilize a drilling fluid that will stabilize the hole. Locate, record, and correct the path of the drill head a minimum of every 10 feet. Use a backreamer sized no larger than 2 inches greater than the outside diameter of the conduit. Use a backreamer that injects mixing mud to fill any voids in the hole while pulling conduit through. Use mixing mud designed and rated by the manufacturer specifically for preserving the integrity of the soil and preventing collapse during and following directional drilling. Perform plowing required for the installation of conduit at locations shown in the contract documents, or as approved, and as follows: Do not plow trenches wider than necessary for the proper installation of the conduit and other appurtenances. Empty conduit reels shall be disposed of in accordance with Subsection 107.17.
