(A) Preparation. The pavement, sidewalk, driveway or other surface shall be cut vertically along the lines forming the trench in such a manner as to not damage the adjoining pavement or hard surfacing. An undercut bevel at the rate of one inch per foot of thickness will be provided at the proposed junction between the old and new surfaces. The portion to be removed shall be broken up in a manner that will not cause damage to the pavement outside the limits of the trench. However, any pavement damaged by operations outside the limits of the trench shall be replaced. All waste material resulting from the excavation shall be removed immediately from the site of the work.
(B) Backfill.
(1) Materials. Materials for backfill will be of select nature. All broken concrete, peat, decomposed vegetable matter and similar materials obtained from excavation will be removed from the site prior to beginning of backfilling. All backfill will be placed in layers not over eight inches loose measure in thickness. Compaction will be obtained by mechanical rollers, mechanical tampers or similar means. Material for backfilling will have optimum moisture to ensure compaction to a degree equivalent to that of the undisturbed ground in which the trench was dug. Jetting or internal vibrating methods of compacting sand fill or similar methods of compacting sand or similar granular-free draining materials will be permitted.
(2) Density. The density (dry) of the backfill under pavements, sidewalks, curbs or other structures will be not less than that existing prior to excavation. The fill shall be restored and placed in a good condition which will prevent settling.
(C) Restoration of surfaces.
(1) General. All street surfacing, curbs, gutters, sidewalks, driveways or other hard surfaces failing in the line of the excavation which must be removed in performance of the work shall be restored in kind by the excavator, unless otherwise directed by the Town Council, in accordance with the specifications contained herein governing the various types of surfaces involved.
(2) Protection of paved surfaces. In order to avoid unnecessary damage to paved surfaces, track equipment shall use pavement pads when operating on or crossing paved surfaces.
(3) Time. In traffic lanes of paved streets, the excavator shall provide temporary gravel surfaces or cold mulch in good condition immediately after backfill has been placed, and shall complete permanent repairs on the street, sidewalk, curb, gutter, driveway and other surfaces, within five days from the date of completion of the backfill, except for periods:
(a) When permanent paving material is not available;
(b) When weather conditions prevent permanent replacement; and
(c) When an extension of time is granted by the Superintendent of Streets.
(4) Temporary repair. If temporary repair has been made on the paved street with gravel and a permanent repair cannot be made within the time specified above due to any of the above mentioned conditions, then the excavator shall be required to replace the gravel with cold mulch as soon as possible.
(D) Restoring bituminous on concrete or asphalt surfaces.
(1) Temporary grade surface. Where excavations are made in paved areas, the surface shall be replaced with a temporary gravel surface. The gravel shall be placed deep enough to provide a minimum of six inches below the bottom of the bituminous or concrete surface. Normally, this will require nine inches of gravel for bituminous surfaces, 12 inches of gravel for concrete, and concrete base for asphalt-wearing surfaces. The gravel shall be placed in the trench at the time it is backfilled. The temporary gravel surface shall be maintained by blading, sprinkling, rolling, adding gravel, to maintain a safe, uniform surface satisfactory to the inspector or Superintendent of Streets until the final surface is laid. Excess material shall be removed from the premises immediately. Material for use on temporary gravel surfaces shall be obtained from sound, tough, durable gravel or rock meeting the following requirements for gradings:
Passing 1-inch sieve | 100% |
Passing 3/4-inch sieve | 85 - 100% |
No. 4 sieve | 45 - 65% |
Passing No. 10 sieve | 30 - 50% |
Passing No. 200 sieve | 5 - 10% |
(2) Bituminous surface. The exposed edges of existing pavement shall be primed with type MC-1 bituminous material. The type, grade and mixture of the asphalt to be used for street surface replacement shall be approved by the Superintendent of Streets. The thickness shall be equal to the adjacent surface thickness, but not less than three inches. The complete surface shall not deviate more than one-half inch between old and new work.
(E) Concrete surfaces. The sub-base for concrete surfaces shall be sprinkled just before placing the concrete. Joints and surfaces shall be made to match the original surfaces. The thickness of concrete shall be equal to the adjacent concrete, but in no case less than six inches thick. The mixing, cement, water content, proportion, placement and curing of the concrete will be approved by the Superintendent of Streets. In no case shall the concrete have less compressive strength than 3,000 pounds per square inch at the end of 28 days.
(F) Concrete base, bituminous wearing surfaces. This type of surfacing shall be constructed as above described.
(G) Gravel surfaces. Trenches excavated through gravel-surfaced area, such as gravel roads and shoulders and unpaved driveways, shall have the gravel restored and maintained as described in division (E) above; except that, the gravel shall be a minimum of one inch more than the thickness of the existing gravel.
(H) Jetting pipe. Jetting pipe, by means of water under pressure or compressed air, is permitted only when approved by the town.
(Prior Code, § 7-3-4) Penalty, see § 10.99