16 - Micro-Trenching Ordinance - Laserfiche WebLink

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(2) In an Asphalt/Concrete street with ONLY curb: Cut trench 18" off the curb face. See Detail 2 in Sec. 10.05.307. (3) In Asphalt/ Concrete street with NO Curb: cut trench 18" off edge of pavement. See Detail 3 in Sec. 10.05.307. (c) The micro -trench shall be constructed with continuous uniform straight and neat edges. (d) Micro -trench alignments shall consist of runs parallel to the centerline of the street. Street crossing may be done provided the alignment is perpendicular to the street centerline to the extent possible. (e) The micro -trench width shall be a minimum of 0.5 -inches and a maximum of 2.5 - inches. (f) Up to two (2) vertically stacked conduits can be placed within a micro -trench. (g) The top of the highest conduit shall be installed at a minimum depth of 12 -inches below the existing pavement surface, and at least 1 -inch below the bottom of the asphalt or concrete pavement. (h) The bottom of the micro -trench shall have a minimum depth of 16 -inches and a maximum depth of 24 -inches. (i) Micro -trenching may be permitted on special pavements such as decorative asphalt paving, and through existing improvements such as perpendicular to speed bumps, as determined by the Public Works Director or City Engineer. Special pavements and existing improvements shall be restored in kind as approved. Sec. 10.05.304 Backfill (a) All backfill material and sealer specifications must be approved by the city prior to use. (b) All micro -trenches shall be completely backfilled with MK1 Services' 600 FP or Corbel Communications Industries "Corbel Trench Fill" proprietary micro -trench reinstatement material or approved equal, to finish grade by the end of the workday. Alternative backfill must be approved by the city prior to use, and will meet the following specifications: (1) Meeting or exceed the strength of the material it is replacing Page 5 of 8