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traffic control devices. <br />2. The preferred locations of utilities are within a public utility easement (PUE) adj scent to the <br />publicright-of--way, beneath sidewalk locations, and within the plant strip area. Longitudinal <br />installations within the plant strip area shall comply with specific installation standards <br />outlined in this manual Alternate locations may be allowed within the right-of--way if <br />topography or site conditions make use of the primary locations infeasible. Utilities are <br />required to avoid conflicts with stormwater-related conveyance and treatment facilities. <br />3. Underground facilities may be installed longitudinally in a planting strip within new <br />subdivisions and existing developed areas that have a minimum clear width of 6 feet between <br />back of curb and front edge of sidewalk. Utility designs shall demonstrate that a utility free <br />zone for the planting of street trees shall be maintained to the maximum extent possible. In <br />no case shall the utility free zone be less than 3 feet wide. <br />In new subdivisions and existing developed areas with planting strips less than 6 feet wide <br />(with or without the presence of existing public trees), underground longitudinal facility <br />installation in the planting strip maybe approved only as an exception. Utilities proposing <br />to install underground facilities in these locations shall request an exception in writing to the <br />Traffic Technical Team Supervisor and such request shall be accompanied by a proposed <br />design. The proposed design shall show all existing infrastructure and demonstrate an <br />adequate utility free zone of a minimum of 3 feet in width for the planting and protection of <br />public trees. An exception may be approved, approved with conditions, or denied at the sole <br />discretion of the Traffic Technical Team Supervisor. <br />4. Unless otherwise required by EC Chapter 9, fire hydrants and main-line shut-offvalves may <br />be placed in the planting strip as long as their location allows for street tree planting <br />requirements as detailed in R-7.280. All other surface and above ground facilities shall be <br />located in a PUE adj scent totheright-of--way. In existing areas without the benefit of a PUE, <br />facilities such as transformers, junction boxes, and water meters are allowable in the planting <br />strip when necessary so long as their location allows for street tree planting requirements as <br />detailed in R-7.280. Utilities are required to avoid conflicts with stormwater-related <br />conveyance and treatment facilities. This section does not apply to street light or traffic <br />control facilities owned by the City. <br />5. All underground pipes and conduits in the public way shall be laid a minimum depth of 30 <br />inches below street or alley grade and 30 inches below ground level in public utility <br />easements, unless otherwise approved by the City Manager or designee. See EC 7.302. <br />Utilities placed in the plant strip area of new subdivisions and existing developed areas with <br />no trees shall be laid a minimum of 36 inches below finish grade. The additional 6 inches <br />of depth is needed to facilitate the placement of future trees. <br />Utility & R/W Permit Manual <br />Exhibit A - 27 <br />C:\WINDOWS\Temporary Internet Files\OLKB202\03rowrlexa.wpd -Manual (03ROWR~1).WPD(11/07/03) <br />