(A) Any person, firm, or corporation making cuts in pavements, curbs or sidewalks or excavations in the streets, alleys, driveways, parking lots, curbs or sidewalks of the city, by authority of permits issued, shall comply with the following specifications for trench excavating, bedding, backfilling and resurfacing.
(1) All pavements, sidewalks and curbs shall be saw cut along neat and straight lines the full depth of the existing pavements, curbs and sidewalks prior to any excavation work.
(2) The bedding and backfilling below, around and above the water main, sanitary sewer, storm sewer, force main, gas main, electric cable, telephone cable, conduit and other utility lines, including service lines, service line taps and laterals shall be bedded, backfilled and encased with compacted No. 12 stone up to a point 12" above the top of the utility line. The utility trench shall then be backfilled with "FFR.ID Flowable Fill Removable" up to the bottom of the existing street, alley, and/or sidewalk surface. In some cases the City Street Commissioner may require the use of "FFNR.ID Flowable Fill Nonremovable." Flowable fill may be substituted for No. 12 stone backfill.
(B) Any person, firm or corporation making cuts in pavements, curbs or sidewalks or excavations in the streets, alleys, driveways, parking lots, curbs or sidewalks of the City, by authority of permits issued, must consult with the City Street Commissioner and determine the type of flowable fill to be used, on a case by case basis, before applying for a street cut permit and initiating utility work. The street, alley and/or sidewalk surface replacement shall be in accordance with the following described procedures.
(1) On existing concrete or resurfaced concrete pavements, a minimum of 8" of 4,000 psi concrete is required to match the surface of the undisturbed pavement. If the Pavement has been resurfaced with hot asphalt concrete (H.A.C.), the top 2" shall be H.A.C. surface to match the surface of the undisturbed pavement.
(2) On existing hot asphalt concrete (H.A.C.) pavement, a minimum of 6" of H.A.C. base and 2" of H.A.C. surface is required to match the surface of the undisturbed pavement. In lieu of the 6" of H.A.C. base 2" of H.A.C. surface, a minimum of 6" of 4,000 psi concrete and 2" of H.A.C. surface may be installed.
(3) On existing stone surfaced alleys, a minimum of 12" of compacted No. 53 stone is required over the compacted No. 12 stone backfill.
(4) Existing sidewalks that are removed shall be replaced 4,000 psi concrete to a minimum thickness of 4". Sidewalks that are cut longitudinally and partially shall be entirely removed and replaced with new sidewalks. The new sidewalk width shall be equal to that of the original sidewalk. Where sidewalks and curbs are cut and removed at street intersections, ADA accessible curb ramps, with detectable warning plates, shall be installed.
(5) Existing curbs that are removed shall be replaced using 4,000 psi concrete.
(6) Street milling shall be required at each transverse or longitudinal utility cut for water main, sanitary sewer, storm sewer, force main, gas main, electric cable, telephone cable, conduit and other utility lines, including service lines. Street milling to a minimum depth of 2 inches will be required. For transverse utility cuts that run from one half the street width to the total street width, street milling will be required parallel with, adjacent to and on each side of the trench, and at a minimum of 3 feet from both edges of the trench. For longitudinal utility cuts the length, width and location of street milling will be determined by the City Street Commissioner, on a case by case basis. Any person, firm or corporation making longitudinal cuts in street pavements, by authority of permits issued, must consult with the City Street Commissioner and determine the length, width and location of street milling required for each longitudinal utility cut before applying for a street cut permit and initiating utility work.
(C) The person, firm or corporation making the utility installation shall be responsible for maintaining the backfilled trenches until the final pavement surface is installed.
(D) Failure of any permit holder to comply with these backfill specifications shall be cause for refusal, by the city, to issue future permits for work to the applicant.
(E) The permit applicant shall be responsible for repair and restoration of all trench cuts which settle and which in the opinion of the Street Commissioner requires additional work to repair or restore. The Street Commissioner will notify the applicant of his or her decision that the cut needs repair or restoration and the applicant shall be given 5 days after being notified in which to complete the repair or restoration. If the applicant fails to complete the repair or restoration within 5 days of being notified by the Street Commissioner, the City of Washington may repair or restore the cut themselves and seek reimbursement from The applicant of all costs for equipment, material and labor incurred by the city.
(Prior Code, § 97.59) (Ord. 4-2000, passed 3-27-2000; Am. Ord. 5-2008, passed 4-14-2008; Am. Ord. 12-2013, passed 7-8-2013; Am. Ord. 14-2017, passed 6-12-2017)