Specifications include, but are not limited to: A. This section covers the installation of water mains in the sizes indicated and at the locations shown on the drawings, using horizontal directional drilling (HDD). B. HDD is a trenchless excavation method which is accomplished in three phases. The first phase consists of drilling a small diameter pilot hole along a designed directional path. The second phase consists of enlarging the pilot hole to a diameter suitable for installation of the pipe. The third phase consists of pulling the pipe into the enlarged hole. HDD is accomplished using a specialized horizontal drilling rig with ancillary tools and equipment. C. Services furnished by Contractor shall be performed in accordance with standard HDD industry practice and these Contract Documents shall include all labor, equipment, and consumables necessary to complete the work, including the following tasks: 1. Clearing, grading, and general site and access preparation necessary for construction operations. 2. Transportation of all equipment, labor, consumables, and materials to and from the site of the work. 3. Erection of horizontal drilling equipment. 4. Locate all existing utilities as required. 5. Drilling of a small diameter pilot hole along the path defined on the drawings. 6. Reaming the pilot hole to a diameter suitable for installation of the prefabricated pull section of pipe. 7. Prefabrication of the pull section of pipe. 8. Installation of the prefabricated pull section of pipe in the reamed hole. 9. Flushing and testing of the installed test waterline in accordance to Section 02615. 10. Clean-up and restoration of all work areas. 11. Recording as-built location of mains on the drawings. 12. Other items of work as required. D. The Contractor shall furnish all labor, materials, tools, equipment, drilling fluids, and other items as necessary for a complete and functional installation as required.
