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gravity flow systems which, due to topography or site constraints, must be <br /> shallower to maintain minimum slope; unavoidable grade conflicts with existing <br /> underground facilities; and site, topography and/or subsurface conditions prohibitive <br /> of excavation at standard depth. <br /> 3. to new residential subdivisions the primary locations for utility placement are in a <br /> public utility easement adjacent to the public right-of-way and beneath sidewalk <br /> locations. Alternate locations may be allowed within the right-of-way if topography <br /> or site conditions make use of the primary locations infeasible. Utility lines and <br /> structures shall not be located in the planting strip between the curb and sidewalk <br /> where they would conflict with street trees. Facilities such as transformers, junction <br /> boxes, water meters, and fire hydrants may be placed in the planting strip when <br /> necessary so long as they are located between street trees, as close to the <br /> property line as possible. <br /> 4. No portion of a utility trench within a street may be located closer than one foot <br /> parallel to the face of the gutter. Utility trenches in the planting strip may not be <br /> located closer than one foot parallel to the back of the curb. <br /> 5. Whenever pavement removal within public streets would cause the pavement to be <br /> cut within three feet of an existing edge, curb, score, joint, or crack the existing <br /> pavement shall be removed to that score, joint, or crack. <br /> <br /> 6. Minimum width of pavement cuts shall be three (3) feet in Portland cement concrete <br /> streets, alleys, and driveways; and a "T" trench in asphalt concrete streets which <br /> shall be computed as follows: Surface Width of Trench (including sloughing) + One <br /> Foot (six inches each side). An acceptable alternative to using the "T' trench is <br /> through the performance of compaction testing by an independent testing lab. If <br /> this alternative is selected, frequency of the compaction testing shall be as is <br /> currently specified by the City on City contract projects. Alternate trenching and <br /> backfill methods resulting in pavement cuts which differ from these standards may <br /> be submitted for consideration on a case-by-case basis. _ <br /> Pavement cuts for vacuum type excavation shall be no greater than 24" wide for <br /> square cuts and no greater than 12" in diameter for round core cuts. Backfill for <br /> vacuum type excavation within or adjacent to paved surfaces shall be controlled <br /> density fill (CDF). Surface restoration for vacuum excavation shall conform to <br /> requirements of section 3.B.1 for concrete surfaces and 3.B.2 for asphalt surfaces. <br /> <br /> 7. Cutting of existing pavements shall be performed with a rotary saw. The alignment <br /> of the cutting shall be straight and the cutting depth shall be to a minimum of 60% <br /> of the existing pavements depth. <br /> Minor maintenance of existing facilities requiring small amounts of asphalt concrete <br /> pavement cutting (less than 15 linear feet around the perimeter of the excavation) <br /> may be performed using a clay spade. _ <br /> Utility & R/W Permit Policy i7 12/01/97 <br /> <br />