Resolutions-1997-021

B. Variances to clear zone requirements will be considered for overhead electrical facilities where compliance will significantly impact existing trees. In no case will a clear zone of less than 18 inches be allowed. A clear zone variance must be approved by the City Engineer. 6.05 EXCAVATION AND BACKFILL A. Within public right-of-way, backfill shall consist of Class A crushed stone or suitable job excavated material placed in one foot lifts compacted to 90% Modified Proctor Density. The City Engineer is to determine under what conditions and what locations job excavated material may be used as backfill material. If crushed stone is used, the top 12 inches of backfill shall consist of suitable job excavated materials. Flowable mortar may be used upon approval of mix design by the City Engineer. Sand backfill is not permitted; however, sand may be used as electric, telephone, or cable utility bedding. B. In all other areas backfill shall consist of suitable job excavated material placed in one foot lifts and compacted to 85% Modified Proctor Density. 6.06 WORK AROUND TREES A. Use care to prevent work within the drip line of trees. B. When work falls within the drip line of trees, contact the City. 6.07 RESTORATION OF BRICK STREET SURFACE A. Use care to salvage bricks during excavation. B. Construct a 7 inch thick base of IDOT M-3 concrete. Allow enough depth for installation of brick on a sand cushion. C. Brick shall be placed on a sand cushion making sure the pattern and elevation match the surrounding street. D. A 50% sand and 50% Portland cement mixture shall be swept into the brick joints and fogged with a mist of water to insure seating of the brick. 6.08 RESTORATION OF ASPHALT OVERLAY ON BRICK STREETS A. Construct a 7-inch thick base of IDOT M-3 concrete flush with the top of the surrounding bricks. B. Tack and place 3/8 inch IDOT Type A mix asphalt and compact to the proper elevation. 6.09 RESTORATION OF ASPHALT OVERLAY ON PORTLAND CEMENT CONCRETE STREETS A. Construct a concrete base of the same thickness as was removed using M-3 mix. An IDOT type BY-3 joint shall be used to joint the base to existing concrete. Use #5 epoxy coated bars, 24 inches in length, spaced 30 inches on center drilled and grouted 9 inches into the existing slab. The concrete base shall be flush with the existing concrete.