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gravity ow systems which, due to topography or site constraints, must be shallower <br /> to main ain minimum slope; unavoidable grade conflicts with existing underground <br /> facilitie ;and site, topography and/or subsurface conditions prohibitive of excavation <br /> at Stan and depth. <br /> <br /> 3. In new residential subdivisions the primary locations for utility placement are in a <br /> public tility easement adjacent to the public right-of-way and beneath sidewalk <br /> locatio s. Alternate locations may be allowed within the right-of-way if topography <br /> or site onditions make use of the primary locations infeasible. Utility lines and <br /> structu s shall not be located in the planting strip between the curb and sidewalk <br /> where t ey 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 /> necess ry so long as they are located between street trees, as close to the property <br /> line as ossible. <br /> No po ion of a utility trench within a street may be located closer than one foot <br /> paralle 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 /> <br /> 5. Whene er pavement removal within public streets would cause the pavement to <br /> be cut ithin three feet of an existing edge, curb, score, joint, or crack the existing <br /> pavem nt shall be removed to that score, joint, or crack. <br /> Minimu 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 b computed as follows: Surface Width of Trench (including sloughing) + One <br /> Foot (s x inches each side). An acceptable alternative to using the "T" trench is <br /> throug the performance of compaction testing by an independent testing lab. If <br /> this alt rnative is selected, frequency of the compaction testing shall be as is <br /> current y 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 sub fitted for consideration on a case-by-case basis. <br /> Pavem nt 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 /> vacuu type excavation within or adjacent to paved surfaces shall be controlled <br /> densit fill (CDF). Surface restoration for vacuum excavation shall conform to <br /> require ents 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 utting shall be straight and the cutting depth shall be to a minimum of 60% <br /> of the xisting pavements depth. <br /> Minor aintenance of existing facilities requiring small amounts of asphalt concrete <br /> pavem nt cutting (less than 15 linear feet around the perimeter of the excavation) <br /> may b performed using a clay spade. <br /> Utility & R/W Per it Policy 17 02/09/98 <br /> <br />