[HISTORY: Adopted by the Wilton Town Meeting 3-7-1961, after adoption by the Planning Commission 2-15-1961, effective 3-2-1961. Amendments noted where applicable.]
All streets shall be laid out and staked by a licensed engineer or surveyor and shall be certified by him as to correctness of line and grade, of completed drainage and subgrade of road.
After the gravel road base has been completed, shoulders graded, monument set and guard rails, if required, installed, then an "As Built" plan and profile showing all improvements shall be submitted and only after this "As Built" plan has been approved by the Town Engineer and Planning Commission shall the final surfacing of the road by applied subject to the conditions hereinafter specified.
Line and grade stakes shall be spaced not more than 50 feet apart and shall be set and maintained in good order during construction and until the "As Built'' map has been submitted and accepted.
After all underground piping and drainage and other underground structures and facilities have been installed, the subgrade of a street shall be shaped to proper grade and cross section at the required depth below finished grade. Fill under streets shall be of material acceptable to the Town Engineer and be free from loam, tree cuttings, stumps or frozen dirt and shall be thoroughly compacted. Soft areas shall be excavated, drained and filled with gravel or selected fill.
After the subgrade has been shaped and checked for proper elevation and cross section by the contractor's engineer and inspected by the Town Engineer, a gravel base, 12 inches deep after compaction, shall be constructed of selected bank-run gravel, which shall be well graded from maximum four inch coarse to sand consisting of sound, durable aggregate, free from thin shale, clay, loam or vegetable matter.
The gravel shall be placed and graded to proper grade and cross section and, when thoroughly compacted, shall be the thickness called for in the Town Standard Details. Rolling shall be done with a roller weighing not less than 10 tons.
The Town Engineer shall be given 48 hours' notice before any gravel is placed.
All new roads shall be black-topped with asphaltic concrete. Prior to the application of this final surfacing the gravel base shall have been in place one year and the subgrade shall have had an opportunity to demonstrate its adequacy to the satisfaction of the Town Engineer. Any areas that show excessive settlement shall have the gravel base removed and the subgrade soft spots excavated and backfilled with gravel. Also if additional drainage is required to alleviate wet conditions which caused the settlement, such drainage shall be installed.
Streets with asphaltic concrete surfaces shall be paved with dense graded hot bituminous concrete of mix proportions and in accordance with construction procedures as specified in Connecticut State Highway Form 808, Section 4.03, "Hot Asphaltic Concrete," and Section 4.06, "Dense Graded Bituminous Concrete Pavement."
Asphaltic concrete surface shall be at least two inches thick after rolling with a 10 ton roller and shall be true in section and profile with maximum depression of 1/4 inch when tested with a 10 foot long straight edge.
The Board of Selectmen may permit oiled and sanded surfacing of roads, under certain conditions, such as repairs or extensions to existing oiled surfaced roads or when it is deemed in the best interests of the Town of Wilton. The oiled surfacing specifications shall be determined by the Board of Selectmen.
The Town Engineer shall have 48 hours' notice before paving operation begins. The street shall not be open to traffic for 48 hours after paving.
Where called for on plans, asphalt curbs and gutters shall be constructed of dense-mix asphaltic concrete of fine aggregate for curbs, in accordance with standard sections as shown on Town Standard Drawings. Curbs and gutters shall be laid true to section and line and on true grades.
Where called for on plans, concrete curbs shall be constructed of 3,000 pounds per square inch concrete of section shown on Town Standard Details. Slump shall not exceed four inches and concrete shall be thoroughly vibrated. Exposed faces shall be rubbed.
Forms for concrete curbs shall be set true to line and grade and properly and thoroughly braced. In hot drying weather, concrete shall be kept covered and moist for seven days.
Through expansion joints shall be provided, on 10 foot centers, of 1/4 inch premoulded bitumastic expansion-joint material.
The contractor shall notify the Town Engineer 48 hours in advance of placing concrete and no concrete shall be placed until the forms have been inspected and approved and unless the Town Engineer or his representative is present. The Town Engineer has the right to request test cylinders to be made and the concrete tested to insure compliance with concrete specifications.
No concrete shall be placed in freezing weather unless proper precautions are taken and then only with the approval of the Town Engineer.
Street shoulders shall be constructed according to Town Standard Details and, except where gravel is called for, disturbed areas shall be covered with a minimum of four inches of topsoil, and a stand of grass to the full width of the right-of-way, and as far beyond as the disturbed areas extend. No stumps shall be buried in shoulders, except that if existing trees have to be cut down, their stumps may be left in place when cut off and removed to a level 12 inches below finished grade. Healthy trees that do not obstruct the drainage or create a traffic hazard are not to be removed.
Manholes, catch basins and headwalls shall be built in accordance with Town standards and placed according to location and elevations on approved plans. Where structures of special design, such as retaining walls, bridges or box culverts are required, they shall be designed by a licensed engineer and shall be submitted to the Town Engineer fin approval. No structure shall be backfilled until inspected and approved by the Town Engineer.
Sewers and drains shall be laid true to line and grade and shall be certified by a licensed engineer or surveyor that they are in accordance with approved plans and drawings.
Pipe in streets shall be reinforced concrete pipe, State Highway Standard weight, unless heavier weight is required under major streets. Pipe shall be laid on firm ground free of frost and shall be firmly bedded. No rock over 12 inches in diameter shall be backfilled over pipe. Fill over pipe shall be thoroughly compacted to avoid future settlement.
Subgrade drains, where required, shall be installed in accordance with Town standards and shall be properly located and graded to accomplish their function.
No pipes shall be backfilled until inspected by the Town Engineer or his representative.
Town Standard Detail Drawings dated October 1, 1973, are a part of this ordinance. Prints may be obtained in the Department of Public Works.