(A) Boring or jacking.
(1) Pits and shoring. Boring and jacking under rights-of-way shall be accomplished from pits located at a minimum distance specified by the Director of Public Works from the edge of the pavement. Pits for boring or jacking operations and backfilled within 48 hours after boring or jacking operations are completed. While pits are open, they shall be clearly marked and protected by barricades. Shoring shall be designed, erected, supported, braced and maintained so that it will safely support all vertical and lateral loads that may be imposed upon it during the boring or jacking operations.
(2) Wet boring or jetting. Wet boring or jetting shall not be permitted under the roadway.
(3) Borings with diameters greater than six inches. Borings over six inches (0.15 m) in diameter shall be accomplished with an auger and following pipe, and the diameter of the auger shall not exceed the outside diameter of the following pipe by more than one inch (25 mm).
(4) Borings with diameters six inches or less. Borings of six inches or less in diameter may be accomplished by either jacking, guided with auger or auger and following pipe method.
(5) Tree preservation. Any facility located within the drip line of any tree designed by the city to be preserved shall be bored under or around the root system.
(B) Trenching. Trenching for facility installation, repair or maintenance on rights-of-way shall be done in accord with the applicable portions of § 603 of IDOT’s Standard Specifications for Road and Bridge Construction.
(1) The length of open trench shall be kept to the practicable minimum consistent with requirements for pipe-line testing. Only one-half of any intersection may have an open trench at any time unless special permission is obtained from the Director of Public Works.
(2) Open trench and windrowed excavated material shall be protected as required by state traffic laws. Where practicable, the excavated material shall be deposited between the roadway and the trench as added protection. Excavated material shall not be allowed to remain on the paved portion of the roadway. Where right-of-way width does not allow for windrowing excavated material off the paved portion of the roadway, excavated material shall be hauled to an off-road location.
(3) The utility shall not trench within the drip line of any tree designated by the city to be preserved.
(C) Backfilling.
(1) Any pit, trench or excavation created during the installation of facilities shall be backfilled for its full width, depth and length using methods and materials in accordance with IDOT’s Standard Specifications for Road and Bridge Construction. When excavated material is hauled away or is unsuitable for backfill, suitable granular backfill shall be used.
(2) (a) For a period of three years from the date construction of a facility is completed, the utility shall be responsible to remove and restore any backfilled area that has settled due to construction of the facility.
(b) If so ordered by the Director of Public Works, the utility, at its expense, shall remove any pavement and backfill material to the top of the installed facility, place and properly compact new backfill material and restore new pavement, sidewalk, curbs and driveways to the proper grades, as determined by the Director of Public Works.
(D) Pavement cuts.
(1) Pavement cuts for facility installation or repair shall be permitted on a highway only if that portion of the highway is closed to traffic.
(2) If a variance to the limitation set forth in this division (D) is permitted under § 152.011 of this chapter, the following requirements shall apply.
(a) Any excavation under pavements shall be backfilled as soon as practicable with granular material of CA-6 or CA-10 gradation, as designed by the Director of Public Works.
(b) Restoration of pavement, in kind, shall be accomplished as soon as practicable, and temporary repair with bituminous mixture shall be provided immediately. Any subsequent failure of either the temporary repair or the restoration shall be rebuilt upon notification by the city.
(c) All saw cuts shall be full depth.
(d) For all rights-of-way which have been reconstructed with a concrete surface/base in the last seven years, or resurfaced in the last three years, permits shall not be issued unless such work is determined to be an emergency repair or other work considered necessary and unforeseen before the time of the reconstruction or unless a pavement cut is necessary for a J.U.L.I.E. locate.
(E) Encasement.
(1) Casing pipe shall be designed to withstand the load of the highway and any other superimposed loads. The casing shall be continuous either by one-piece fabrication or by welding or jointed installation approved by the city.
(2) The venting, if any, of any encasement shall extend within one foot (0.3 m) of the right-of-way line. No above-ground vent pipes shall be located in the area established as clear zone for that particular section of the highway.
(3) In the case of water main or service crossing, encasement shall be furnished between bore pits unless continuous pipe or city approved jointed pipe is used under the roadway. Casing may be omitted only if pipe is installed prior to highway construction and carrier pipe is continuous or mechanical joints are of a type approved by the city. Bell and spigot type pipe shall be encased regardless of installation method.
(4) In the case of gas pipelines of 60 psig or less, encasement may be eliminated.
(5) In the case of gas pipelines or petroleum products pipelines with installations of more than 60 psig, encasement may be eliminated only if:
(a) Extra heavy pipe is used that precludes future maintenance or repair; and
(b) Cathodic protection of the pipe is provided.
(6) If encasement is eliminated for a gas or petroleum products pipeline, the facility shall be located so as to provide that construction does not disrupt the right-of-way.
(F) Minimum cover of underground facilities. Cover shall be provided and maintained at least in the amount specified in the following table for minimum cover for the type of facility:
Type of Facility | Minimum Cover |
Communication line installed by the plowed method | 24 inches (0.6 m) |
Gas or petroleum products | 30 inches (0.8 m) |
Power or communication line (in general) | 30 inches (0.8 m) |
Sanitary sewer, storm sewer or drainage line | Sufficient cover to provide freeze protection |
Water line | Sufficient cover to provide freeze protection |
(Prior Code, § 33-10-16) (Ord. 21-651, passed 9-9-2021)