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Earthwork And Backfill All excavation for utilities and/or house connections shall be adequately guarded with barricades and lights, so as to protect the public from hazard. Streets, sidewalks, driveways, curbs, parkways, and other public property disturbed in the course of the work shall be restored in a manner satisfactory to the County. Foundation material used for pipe bedding, from a minimum 6 inch distance below the pipe invert to the bottom 12 inches above the top of the pipe, shall be bank run sand and gravel. All gravity sewer, installation procedures must be in accordance with pipe manufacturer's recommendations. All gravity sewers and force mains shall be installed to have minimum cover of 36 inches. Installation of gravity sewers shall be controlled by use of a laser to maintain proper grade. Installation of force mains shall be in accordance with AWWA Standard C600 and the installation specifications for water lines in the water distribution section., irrespective of the type of pipe selected. 1. Trench - Trench width shall be kept to a minimum necessary for installation of the pipe. The trench bottom shall be graded uniformly to match the slope of the pipe. 2. Backfill - Only good quality backfill, free of stones, roots, rocks, broken cement, or other materials that might be damaging to the pipe shall be used. Backfill shall be placed in the trench in uniform lifts of 12 inches. 3. Compaction - All pipes must be compacted by hand tamping to the centerline, under the pipe. Backfill shall be compacted in lifts up to the surface to achieve a minimum compaction of 95 percent of maximum density in roadways and shoulders, and 90 percent in easements in accordance with AASHTO T-180 and ASTM D-2167. Contractor, shall provide owner with compaction test results at 400' intervals at the contractor's expense. 4. Dewatering - Construction shall be accomplished in a dry trench. Well pointing will be required, as necessary. All water entering excavations or other parts of the work shall be contained, collected, and pumped to suitable places for disposal as permitted by State. 5. Sheeting - Sheeting and shoring shall be installed as may be necessary for the protection of the work, preservation of adjacent property and structures, and the safety of employees. Sheeting and bracing shall be uniform to OSHA requirements. * END OF SECTION * 026102 D. 01VISION 2102610 Restrained Joints Excavation and Backrilling.doc