2021-205-E-Solid Waste-Full Circle Environmental-Walnut Grove Wastewater Disposal System

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DocuSign Envelope ID:81 E05E8E-EED7-43D3-8B8A-0811 OE72140A SECTION 33 34 00 - FORCE MAINS Allowance will be made for a width of the trench not in excess of 16" greater than the outside diameter of the bell of the pipe and a depth from the surface of the rock to the established subgrade of the pipeline. Rock excavated in excess of these limits will be paid for. The Engineer shall measure the amount of rock excavation to be classified as such before the trench is backfilled before measurement by the Engineer. M. All blasting, where required, shall be done under the personal supervision of a man thoroughly skilled in this class of work. All necessary measures to protect life and property shall be taken. Where in close proximity to building, transmission lines, telephone lines, or other facilities, timber mats or other means of preventing damage from flying debris shall be used. Ample and suitable signals shall be given in proximity to work before each blast, and flagmen shall be placed on all roads, beyond the danger zone, in every direction to warn traffic. All responsibility for damage rests on the Contractor. N. All existing water, sewer, and gas lines, buried electrical and telephone cable, and other known utilities intersecting the lines of construction, if requested by the Engineer, shall be uncovered by the Contractor at his expense and exposed to the Engineer at least 100' ahead of pipe laying operations to insure the correctness of grades. Existing utilities shown on the plans area as accurately located as existing records and field surveys allow; however, the Contractor shall verify with the various companies before excavating and shall save harmless the Owner from any claims for damages as a result of his work. O. The Contractor shall at all time take necessary precautions in preventing gutters, catch basins, ditches and other drainage facilities from being clogged that might cause flooding conditions and damage to public or private properties. P. During the course of pipeline construction, benching, early seeding or grass cover, and whatever means necessary shall be carried out to prevent siltation and bank erosion. 4.4 INSTALLATION OF FORCE MAINS AND APPURTENANCES A. The Contractor shall haul the pipe and appurtenances to the site of work and distribute them neatly along the trench prior to laying. The pipe shall be carefully handled to prevent damage, mechanical hoists or other approved methods being used in the handling. Depth of cover shall not be less than T-0" for pipe up to 8" in diameter or T-6" for pipes 10" and larger in diameter, measured to the top of pipe, except where shown differently on a profile or specifically authorized by the Engineer. B. Pipe and appurtenances shall be kept clean and open ends securely plugged when pipe laying is not in progress. The inside of pipe and bell and spigots shall be thoroughly inspected and cleaned prior to lowering into the ditch and care shall be exercised after the pipe is in place to prevent dirt or other extraneous material from getting into the pipe or bells and into the spigot. C. Spigots shall be fully seated in the bells and the pipe shall be uniformly bedded on the bottom of the trench for its entire length with bells lying in previously dug bell holes sufficiently large to allow proper bedding and jointing. Fittings, valves and other appurtenances shall be located where shown on the plans or directed by the Engineer, with the pipe being cut where necessary. After jointing, a reasonable amount of deflection may be made in the joint. Such deflection shall not exceed the allowable amount specified by the manufacturer for each size of pipe. D. Pipe shall be laid in accordance with the manufacturer's instructions, applicable portions of AWWA Specification C600, and the following: Orange County DAA PN R00592-225N2 Walnut Grove Wastewater System January, 2021 33 34 00-14