(A) The width of a trench cut shall be kept to the minimum width necessary to install and properly tamp
around the pipe or any new installation.
(1) If rock or adverse soil conditions are encountered and shoring is required, then the trench cut shall be of sufficient additional width to provide for the protection of the workers and proper installation of the pipe or other structure.
(2) Excavations shall comply with applicable Department of Labor Safety and Health Standards for Excavations.
(B) (1) Longitudinal installations of all drain, water, sewer or gas pipes shall be installed within rights-of-way or easements of the town to a minimum cover depth of three feet. The minimum cover depth under pavement shall be four feet below the lowest point of the roadway cross section.
(2) Exceptions may be made where required by unusual conditions on a case by case basis by the Town Roadway Inspector.
(C) When soil conditions permit and there are no conflicting utilities, gas, water, telephone, electric, and cable TV service lines shall be installed through a jacking or boring process.
(1) Sewer service lines should be installed through a jacking or boring process.
(2) However, in the event the jacking procedure is attempted and unsuccessful, then the pipe may be installed using an open cut procedure, with approval by the Town Roadway Inspector.
(D) Before backfilling of any street cut, the contractor shall request an inspection by the Town Roadway Inspector.
(E) The backfill shall be flowable fill concrete as per Section 210 of the 2007 edition, or the latest revision, of the SCDOT's Standard Specifications for Highway Construction.
(F) (1) Prior to completing the backfill operation in all streets in the town, pavement shall be cut 12 inches on each side of the trench and a minimum depth of two inches.
(2) The excavation area shall be paved with a minimum of four inches of hot mix asphalt.
(G) All material shall meet the specifications of the current edition, or latest revision, of SCDOT's Standard Specifications for Highway Construction.
(H) Where the existing pavement sub-base is soil, soil cement, or crushed stone, the base for the permanent pavement repair in all streets shall consist of a minimum of eight inches of flowable fill concrete or acceptable soil backfill as per ASTM D1557.
(1) Where the existing pavement base is concrete, the permanent pavement repair shall consist of a minimum of ten inches of flowable fill concrete or acceptable soil backfill as per ASTM D1557.
(2) If the existing pavement surface is asphalt or tar and gravel, then the permanent pavement repair shall consist of four inches of asphalt.
(3) Where sidewalks are cut, the entire section shall be removed and replaced from the nearest joints and curb.
(I) (1) The entire surface of asphalt roadways will be overlaid on all longitudinal cuts.
(2) Where numerous random utility cuts are made, the street or lane shall be resurfaced for its entire width, if so determined by the Director of Transportation.
(J) (1)
No cuts will be permitted to be opened if, in the opinion of the Director of Engineering and Development Services, the cut cannot be backfilled and resurfacing restored within a reasonable amount of time, or if traffic flows cannot be maintained.
(2) Exceptions will be made for emergencies as defined in § 158.09 hereunder, with due notice to the town's Director of Engineering and Development Services in the form of a traffic control plan and schedule to complete roadway repair.
(K) If any pavement, drainage or other street damage or deficiency is caused by settlement, leakage, rupture, or other action related to the utility, the town may take such corrective action as it deems appropriate and charge the permittee for such costs, including the restoration of such excavation, or give notice to the permittee to restore such excavation or pavement within ten days of such receipt of notice or be in violation of this section.
(Ord. 16049, passed 7-27-16; Am. Ord. 21043, passed 5-11-21)