(A) In general, a street shall be completed to the grade shown on the plan and profile sheet. A plan and profile sheet for each street shall be provided by the developer and prepared by a registered professional engineer or registered land surveyor.
(B) The minimum requirements for street construction shall be in accordance with the latest edition of "Standard Specifications" of the Indiana Department of Transportation, in effect at the time of approval (hereinafter referred to as the Standard Specifications). A copy of the Standard Specifications is on file in the office of the Town Engineer.
(1) The subgrade shall be prepared in compliance with Section 207 of the Standard Specifications.
(2) The subbase, where required, shall be #53 crushed aggregate (or equal) and shall be prepared in compliance with Section 304 of the Standard Specifications.
(3) The street surface shall be of Portland Cement Concrete Pavement (PCCP) or Hot Mix Asphalt (HMA). Portland Cement Concrete materials and construction shall be in compliance with Section 500 of the Standard Specifications and these regulations. HMA materials and construction shall be in compliance with Section 400 of the Standard Specifications and these regulations.
(C) All utility excavations under the pavement shall be backfilled with B Borrow or flowable mortar and construction shall conform to Section 211 or Section 213 of the Standard Specifications or compacted thoroughly by other means. Any other means must be approved by the town prior to construction.
(D) Subsurface drains shall be installed parallel to the street curb at a depth of at least three feet below the back of curb. Subsurface drains shall be a minimum of six inch diameter perforated Polyethylene pipe. Four inch laterals shall be provided for each lot, extended to the right-of-way line and capped. The ends shall be marked by extending a board or other suitable material to the surface and dimensioned on the as-built plans. No direct surface water discharges will be allowed to connect to the subsurface drain.
(E) Stone aggregate base shall be placed under the curb and extended to six inches beyond the outside edge of the curb. This aggregate base shall be continuous and shall match the bottom of pavement (top of subgrade) or be four inches thick, whichever is more.
(F) Wet spots or other unusual soil conditions may develop in streets. These streets must comply with any or all of the following requirements:
(1) Four inch Polyethylene lateral underdrains which extend under the subbase and connect directly to the subsurface drains shall be placed at regular intervals through the wet areas.
(2) Four inches of aggregate (#53 stone) shall be added to the street cross section in addition to the minimum base requirement.
(3) Soft spots may be over excavated and backfilled with compacted aggregate as approved by the Town Engineer.
(4) Geotextile filter fabric or lime stabilization may be used. Use of either of these methods shall not allow a reduction in street cross section.
(5) The use of lime stabilization shall be certified by a professional engineer licensed in the State of Indiana. Complete design data shall be submitted for consideration. All subgrade compaction testing is to be done by a certified and town approved soils testing engineering company. The copies of all test reports must be submitted directly to the town.
(G) The actual design for street construction shall be based upon estimated traffic loading with an adequate growth factor included even though the minimum requirements may be exceeded.
(H) The cross sections of streets are to be based on a design equation for pavement according to AASHTO standards using a combination of soil support values, total equivalent 18 - kip single axle loads, terminal serviceability index, and regional factors. The pavement depths as shown below are minimum requirements:
TABLE 7
HOT MIX ASPHALT PAVEMENT (FLEXIBLE PAVEMENT)
HOT MIX ASPHALT PAVEMENT (FLEXIBLE PAVEMENT)
ROAD CLASSIFICATION | SURFACE | BINDER | BASE | AGGREGATE |
ROAD CLASSIFICATION | SURFACE | BINDER | BASE | AGGREGATE |
Minor | 1 1/4" | 2 3/4" | 0" | 9" |
1 1/4" | 0" | 3" | 7" | |
1 1/4" | 2 3/4" | 4" | 0" | |
Collector or Commercial | 1 1/4" | 2 3/4" | 4" | 6" |
1 1/4" | 0" | 5" | 9" | |
1 1/4" | 2 3/4" | 7" | 0" | |
Arterial or Industrial | 1 1/4" | 2 3/4" | 6" | 8" |
1 1/4" | 0" | 8" | 9" | |
1 1/4" | 2 3/4" | 10" | 0" | |
TABLE 8
PORTLAND CEMENT CONCRETE PAVEMENT (RIGID PAVEMENT)
PORTLAND CEMENT CONCRETE PAVEMENT (RIGID PAVEMENT)
ROAD CLASSIFICATION | PAVEMENT | AGGREGATE |
Minor | 6" | 6" |
Collector or Commercial | 7" | 6" |
Arterial or Industrial | 8" | 6" |
Add one inch of HMA Binder or Base, or Portland Cement Concrete Pavement, to the minimums shown for truck traffic > 10% of ADT.
Add two inches of HMA Binder or Base, or Portland Cement Concrete Pavement, to the minimums shown for truck traffic > 10% of ADT.
(I) Commercial driveways (located within the right of way) and auxiliary lanes shall be constructed to the equivalent thickness of the pavements they are added to (as set out in Tables 7 and 8) or the entrances they are constructed to serve, whichever is greater.
(J) Existing street pavements to be upgraded to applicable standards as parts of improvements to be accepted by the town, will be tested and evaluated by the design professional to determine the condition, quality and amount of pavement and the condition of the subgrade. Existing pavements may be upgraded by augmenting the existing pavement structure if elevations and grades are compatible and if the resulting pavement meets the structural and geometric requirements of Tables 7 and 8; or the existing pavement materials, if suitable, may be incorporated into a new pavement structure.
(Ord. 1999-06, passed 6-8-99)