South Dakota Administrative Rules › Title 70 - Department of Transportation › Article 70:04 - Highway signs and rights-of-way › Chapter 70:04:05 - Utility accommodations on noninterstate rights-of-way › Appendix A - Open cut method of utility installation or repair

Current through Register Vol. 51, page 10, July 15, 2024
APPENDIX A
SEE: §
										70:04:05:06
APPENDIX A
OPEN CUT METHOD OF
UTILITY INSTALLATION OR REPAIR
ISSUED 12/7/76
REVISED 4/1/89
The open cut method of installation or repair of utilities under asphalt or concrete pavements will be allowed when, in the opinion of the region engineer, jacking, boring, tunneling, or similar methods are not feasible or practical.
The open cut method shall be accomplished in accordance with the following:
TYPICAL SECTION FOR CONCRETE PAVEMENT
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TYPICAL SECTION FOR ASPHALT PAVEMENT
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TRAFFIC CONTROL
Signing and safety devices shall be utilized in accordance with requirements of Part VI of the
Manual on Uniform Traffic Control Devices.
PAVEMENT REMOVAL
Concrete
The opening in the existing pavement shall be made by sawing full depth.
On longitudinal occupancy, the pavement shall be removed full panel width.
On transverse occupancy, the pavement shall be removed a minimum of 10 feet wide. If within 10 feet of a joint, it shall be removed to 2 feet beyond the joint.
Deformed dowel bars shall be installed prior to replacing the concrete in accordance with the attached details.
All contraction and longitudinal joints shall be replaced at the original location and sealed with a low modulus silicone sealant.
When the concrete has an asphalt overlay, the asphalt shall be removed at least 6 inches beyond the concrete removal.
For small disturbed areas and other unique situations, the region engineer may approve deviations from the above requirements.
The concrete removed shall be disposed of by the contractor.
Asphalt
The opening in the existing pavement shall be made by sawing full depth.
The asphalt removed shall be disposed of by the contractor.
EXCAVATION
All unstable material, as determined by the region engineer, shall be removed and disposed of by the contractor.
BACKFILL
The excavated material may be used for backfill unless found to be unsuitable by the region engineer. Any other material proposed for backfill must be approved by the region engineer before being used.
The backfill material shall be placed in layers not to exceed 6 inches in loose depth. Each layer shall be uniformly compacted to a minimum of 95 percent of maximum dry density before successive lifts are placed. The backfill material shall be compacted at a moisture content of no less than 4 percentage points below the optimum moisture content.
The Maximum Dry Density and Optimum Moisture Content shall be determined by Test No. S.D. 104 (AASHTO-T99). The requirement for compliance with density and moisture specifications may be waived at the option of the region engineer.
SURFACING REPLACEMENT
Granular Material
Granular material shall be replaced to the previous depth with in-kind material or material which must be approved by the region engineer before being used.
Materials shall be satisfactorily compacted as approved by the region engineer.
Concrete Pavement
If the area abuts an existing joint, the joint shall be formed with styrofoam or other material approved by the region engineer to provide for contraction and expansion.
The concrete used for replacement shall contain 650 lbs. of cement per cubic yard.
If the concrete is replaced in more than one pour, a keyway, as shown in the detail drawing at the beginning of the Appendix, shall be installed between each pour.
The concrete shall be thoroughly vibrated, struck off to blend with the surrounding surface, and given the appropriate finish.
Immediately after finishing the surface, white pigmented curing compound shall be applied at a maximum rate of 150 square feet per gallon of curing compound. Other means of curing may be allowed upon receiving approval by the region engineer.
Traffic shall not be allowed on the newly placed concrete for a minimum of 24 hours after placing or longer as determined by the region engineer.
Asphalt Pavement
The asphalt pavement shall be replaced to the previous depth with in-kind material or material approved by the region engineer.
Pavement shall be satisfactorily compacted as approved by the region engineer.
"Work Zone Traffic Control Standards and Guidelines," Part VI of the Manual on Uniform Traffic Control Devices, Federal Highway Administration, U.S. Department of Transportation, 1985, as amended by revisions dated March 9, 1987 and January 24, 1989. Copies may be obtained from the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402. Cost $44.
"Methods of Sampling and Testing, T99," Part II,
Materials, Tests
, American Association of State Highway and Transportation Officials, dated August 1986. Copies may be obtained from the American Association of State Highway and Transportation Officials, 444 North Capitol Street, N.W. Suite 225, Washington, D.C. 20001. Cost $75.
DETAILS OF DOWEL EMBEDMENT
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DETAILS FOR LOW MODULUS SILICONE SEALANT ON IN PLACE P.C.C.P. JOINTS
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