(A) Trench openings.
(1) No trench opening shall be made for a distance of more than 200 feet at any one time, unless authorized by the permit. In addition, no more than 40 feet of trench shall be left open on the edge of a highway at the end of any work day, unless authorized by the permit.
(2) No highway shall be blocked to through traffic unless authorized by the permit.
(B) Disposition of material.
(1) The permittee shall keep the improved area free of all material which may be deposited by vehicles traveling upon or entering into the highway during the performance of work authorized by the permit.
(2) The permittee shall be responsible for controlling dust conditions created by its own operations.
(3) All excess material and material that is not suitable for backfill shall be removed and disposed of outside the right-of-way as the work progresses.
(4) All retained suitable material shall be placed or stored on the side of the operation farthest from traffic, unless otherwise authorized by the permit, and in such a manner that there will be no interference with the flow of water in any gutter, drain, pipe, culvert, ditch, or waterway.
(C) Backfilling. All openings made in the improved area shall be backfilled by the permittee in accordance with the following minimum standards.
(1) The opening shall first be backfilled with material suitable for insulation to a height not to exceed one foot over the top of the facility, compacted in not more than four-inch layers.
(2) The opening shall then be backfilled with either No. 2 RC aggregate, retained suitable material, or other material specified in the permit, and compacted throughout its full width with approved vibratory compacting equipment in layers not to exceed eight inches.
(3) Compaction shall be completed to within two inches of the top elevation of the existing pavement.
(D) Restoration of flexible base pavements. Base and surface restoration of flexible pavements shall be done in accordance with the following method.
(1) Temporary restoration. Temporary restoration shall be made and kept in place for a minimum of 90 days. This temporary restoration shall be accomplished by utilizing a minimum of two inches of either ID-2 wearing or 2PB stockpile patching compacted to a grade equal to that of the existing pavement. See Figure I below.
(2) Permanent restoration. See Figure II below.
(a) After the minimum 90-day period, but before 210 days, the temporary restoration shall be removed and permanent restoration made.
(b) Prior to making the permanent restoration, six inches from each edge of the trench shall be sawed or cut, in a neat straight line, to the bottom elevation of the existing base course, and the detached material shall be removed.
(c) The permanent base course shall consist of bituminous concrete (BC) having a minimum compacted depth of five inches or a compacted depth equal to the existing base course, whichever is greater.
(d) The permanent wearing course shall be placed in accordance with the depths of the existing bituminous surface but in no case shall the compacted wearing course be less than one inch of ID-2.
(E) Restoration of plain or reinforced cement concrete pavements. Prior to replacement of the concrete, one foot from each edge of the trench shall be sawed or cut, in a neat straight line, to a depth of at least three inches, and the detached material shall be removed. See Figure III below.
(1) The replacement concrete shall consist of high early strength concrete equal in depth to the original concrete pavement.
(2) On existing reinforced cement concrete pavements, reinforced steel and expansion tie bolts shall be placed in accordance with state’s Department of Transportation Roadway Construction Standard RC-26 or its subsequent amendments.
(3) The surface shall be restored as follows: after surface corrections have been completed and just before the concrete becomes non-plastic, the surface shall be given a textured finish.
(F) Shoulder restoration.
(1) Paved and stabilized shoulders. Paved and stabilized shoulders shall be reconstructed and restored to a serviceable condition, of the same type as existed before the start of work.
(2) Other shoulders. Trenches in other types of shoulders shall be backfilled with compacted No. 2RC aggregate and then resurfaced with the same type of material existing prior to construction.
(G) Paint identification. Upon completion of temporary and permanent restoration, the restoration date shall be painted on the pavement immediately adjacent to the cut. The painted date shall indicate the month and year numerically. The numerals shall be at least six inches in height. The paint shall be of a durable wearing quality and shall be color coded as follows: blue (water), yellow (gas-petroleum), red (electric), orange (communications), and green (sewer).
(H) Appurtenances to underground installations.
(1) The top of every manhole, valve box, or other access to the facility shall be at the same elevation as the surface in which it is located.
(2) The surface surrounding manhole or valve covers located in shoulders shall be paved in such a manner as to prevent washouts.
Figure I - Ninety Day Temporary Restoration Method of Flexible Base Pavements
Figure II - Permanent Restoration Method of Flexible Base Pavements
Figure III - Permanent Restoration Method of Plain or Reinforced Cement Concrete Pavements
(Prior Code, Ch. 21, Pt. 1, § 105)