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D . Bolts and nuts for restrained joints shall be A-53 stainless steel , low alloy, high <br /> strength steel . <br /> E . The Contractor shall also provide restrained joints in accordance with the above <br /> criteria wherever below ground fittings are on lines 12- inches in diameter or less . <br /> 11 . 06 HORIZONTAL SEPARATION <br /> A. All water and/or sewer utilities shall be located a minimum horizontal separation <br /> equal to the depth of the pipe plus the diameter of the pipe from any permanent <br /> above ground structures (i . e . , walls , trees , transformer pads , etc. ) . <br /> B . A minimum 4-feet separation is required between water/sewer utilities and other <br /> underground utilities such as telephone , gas , cable , irrigation , etc. <br /> C . All water and/or sewer utilities shall be located a minimum horizontal separation <br /> equal to 2 times the depth of the pipe plus the diameter of the pipe from the top <br /> of bank of any bodies of water ( I . e . , storm water ponds , canals , etc. ) . <br /> 11 . 07 VERTICAL SEPARATION <br /> A. Maintain 18 ' vertical clearance between any water/sewer utility and any other <br /> underground utilities such as telephone , gas , cable , irrigation , etc. <br /> END OF SECTION <br /> 11 - 8 <br />