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making connections therewith, and where a "Y" has been left the con- <br /> nection shall be made without damaging or breaking the same. Stand- <br /> pipe connections to upright "Y" or "T" of the main sewer pipe or <br /> lateral shall be made through 1/8 bends. The upright "Y" or "T" <br /> connection shall be encased in a concrete block on both sides of <br /> main sewer pipe from base of main sewer pipe to a solid supporting <br /> of the bell of upright "Y" or "T" . A 1/8 bend shall be placed <br /> directly upon the upright "Y" or "T" and connection brought directly <br /> to the solid sidewall of sewer trench and changed to vertical by use <br /> of a 1/8 bend at base of riser. 1/8 bends and riser shall be solidly <br /> supported with a continuation of concrete block supporting the bell <br /> of upright "Y" or "T" . Bell holes or recesses for hubs or couplings <br /> shall be provided in sidewall of sewer trench. All excavations made <br /> in any street or alley shall be protected and guarded by said con- <br /> tractor, both by day and night, with the proper display of signals <br /> and lights, and the said contractor shall be responsible upon his <br /> bond for all accidents caused by negligence in this respect. The <br /> street must be opened and the paving or planking and earth deposited <br /> in a manner that will occasion the least inconvenience to the public, <br /> and to provide for a free passage along the gutter. One-half of the <br /> street must be kept clear for the passage of vehicles, and bridgeways <br /> must be provided on sidewalks for foot passengers. In refilling the <br /> trench the earth must be deposited in layers of not more than six <br /> inches (6") in depth and must be well rammed. Puddling or water <br /> flooding for consolidating the backfill may be used only if approved <br /> by the City Engineer. In traffic areas of streets and alleys back- <br /> fill materials shall be such as will permit immediate restoration of <br /> public street, alley or highway to original surface condition within <br /> 24 hours after connection, alteration, or repair has been made. <br /> Material suited for backfill in traffic areas of streets and alleys <br />