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gravity flow systems which, due to topography or site constraints, must be shallower <br />to maintain minimum slope; unavoidable grade conflicts with existing underground <br />facilities; and site, topography and/or subsurface conditions prohibitive of excavation <br />at standard depth. <br />3. 1n nevv 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 property <br />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 <br />be 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 />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 />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 pavemen#s 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 17 02/09/98 <br />