S.D. Admin. R. tit. 70, art. 70:04, ch. 70:04:05, app A
OPEN CUT METHOD OF UTILITY INSTALLATION OR REPAIR
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:
TRAFFIC CONTROL
Signing and safety devices must be utilized in accordance with requirements of Part 6 of the Manual on Uniform Traffic Control Devices for Streets and Highways, Eleventh Edition.
PAVEMENT REMOVAL
Concrete
The opening in the existing pavement must be made by sawing full depth.
On longitudinal occupancy, the pavement must be removed full panel width.
On transverse occupancy, the pavement must be removed a minimum of ten feet wide. If the pavement is within ten feet of a joint, the pavement must be removed to two feet beyond the joint.
Deformed dowel bars must be installed prior to replacing the concrete in accordance with the attached details.
All contraction and longitudinal joints must be replaced at the original location and sealed with a low modulus silicone sealant.
When the concrete has an asphalt overlay, the asphalt must be removed at least six 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 must be disposed of by the contractor.
Asphalt
The opening in the existing pavement must be made by sawing full depth. The asphalt removed must be disposed of by the contractor.
EXCAVATION
All unstable material, as determined by the region engineer, must 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 must be placed in layers not to exceed six inches in loose depth. Each layer must be uniformly compacted to a minimum of ninety-five percent of maximum dry density before successive lifts are placed. The backfill material must be compacted at a moisture content of no less than fourth percentage points below the optimum moisture content.
The maximum dry density and optimum moisture content must be determined by T 99, Standard Method of Test for Moisture-Density Relations of Soils Using a 2.5-kg (5.5-lb) Rammer and a 305-mm (12-in.) Drop, 2022 edition. 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 must be replaced to the previous depth with in-kind material or material which must be approved by the region engineer before being used.
Materials must be satisfactorily compacted as approved by the region engineer.
Concrete Pavement
If the area abuts an existing joint, the joint must be formed with styrofoam or other material approved by the region engineer to provide for contraction and expansion.
The concrete used for replacement must contain six hundred fifty pounds 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, must be installed between each pour.
The concrete must 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 must be applied at a maximum rate of one hundred fifty square feet per gallon of curing compound. Other means of curing may be allowed upon receiving approval by the region engineer.
Traffic must not be allowed on the newly placed concrete for a minimum of twenty-four hours after placing or longer as determined by the region engineer.
Asphalt Pavement
The asphalt pavement must be replaced to the previous depth with in-kind material or material approved by the region engineer.
Pavement must be satisfactorily compacted as approved by the region engineer.
S.D. Admin. R. tit. 70, art. 70:04, ch. 70:04:05, app A
"Temporary Traffic Control," Part 6 of the Manual on Uniform Traffic Control Devices for Streets and Highways, Eleventh Edition, December 2023, Federal Highway Administration, U.S. Department of Transportation. Copies may be viewed and printed free of charge at: https://mutcd.fhwa.dot.gov/pdfs/11th_Edition/mutcd11thedition.pdf. T 99, Standard Method of Test for Moisture-Density Relations of Soils Using a 2.5-kg (5.5-lb) Rammer and a 305-mm (12-in.) Drop, 2022 edition, American Association of State Highway and Transportation Officials. Copies may be obtained at https://store.transportation.org/Item/PublicationDetail?ID=4778. Cost: $105. Click here to view image Click here to view image