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W 4.2 Backfill — Only good quality backfill, free of stones, roots, rocks, broken cement, or other material which might be damaging to the pipe shall be used. Backfill shall be placed in the trench in uniform lifts of 12 inches. ` 4.3 Compaction —All fill must be compacted by hand tamping from under the pipe up to the centerline. Backfill shall be compacted in lifts up to the surface to achieve a minimum compaction of 95% of maximum density in roadways and shoulders and ` 90% in easements, in accordance with AASATO T-180 and D-2167. 4.4 Dewatering — Construction shall be accomplished in a dry trench. Wellpointing will be required as necessary. All water entering excavations or other parts of the work shall contained, collected, and pumped to suitable places for disposal, as permitted by State. r 4.5 Sheetino — 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. 5. Installation of water mains must be in accordance with AWWA Standard C600, irrespective of the type of pipe selected. All installation procedures must also be in conformance with pipe manufacturer's recommendations. Minimum cover shall be 3.6 inches. Magnetic I.D. Tape shall be placed continuously in the trench over PVC pipe, 12" below grade. Allowable deflection of the pipe joints and curvature of PVC pipe shall ` not exceed the manufacturer's specifications. 5.1. Trench: Trench width shall be kept to a minimum necessary for pipe • installation. The trench bottom shall be graded, and alignment shall be parallel with the roadway, where possible. • 5.2. Backfill: Only good quality backfill, free of stones, roots, rocks, broken cement, or other material which might be damaging to the pipe shall be used. Backfill must be put in the trench in lifts. • 5.3. Compaction_ All pipe 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% of maximum density in roadways, and shoulders, and 90% in easements in accordance with AASHTO T-180 and ASTMD-2167. 5.4. Dewatering: Construction shall be accomplished in a dry trench. Welipointing ` 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. 5.5. 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. • •