(A) Streets shall be graded to the full width of the right-of-way, surfaced, and improved to the grades and dimensions shown on plans, curbed with profiles and typical cross-sections submitted by the developer and approved by the Commission. In subdivisions where sidewalks are not required, the sidewalk areas shall be graded in the same manner as if sidewalks were to be constructed and shall be brought to within six inches of final sidewalk grade.
(B) Side slopes shall be graded to blend with the natural lay of the land or in accordance with plans approved by the Commission. Where fill material is necessary to establish uniform grades, compacting shall be required in accordance with Pennsylvania Department of Transportation Form 408 Specifications for embankment. A slope of two horizontal feet to one vertical feet beyond the right-of-way line in cut or fill shall ordinarily be required except for unusual conditions. Street cross sections for minor and collector streets shall be in accordance with accepted standards and shall be approved by the city. Arterial street cross sections shall be as approved by the city and shall be approved by the state where required.
(C) The subgrade shall be shaped to rough lines and elevations equal to the width of the pavement plus two feet. Adequate drainage facilities shall be installed to provide for the disposition of underground seepage and the percolation of surface water. The subgrade shall be thoroughly compacted by power rollers with a minimum weight of ten tons to ensure satisfactory compaction and stabilization; it shall be compacted at optimum moisture content. The finished surface shall be uniformly shaped to facilitate drainage and any irregularities from planned grade shall be corrected prior to placing the subbase. Where material encountered in the normal excavation has a C.B.R. value of 2.5 or less and will not develop the required stability and provide for adequate drainage, the area shall be undercut and granular material added to a depth of at least 12 inches. It shall then be brought to a firm and thoroughly compacted surface as hereinbefore specified. The prepared subgrade shall be protected by the contractor to prevent undue rutting from trucks or other equipment and if such damage does occur, the subgrade shall be reshaped and compacted prior to placing the subbase material.
(D) Subdrains shall be laid along one side of all streets where there is apparent ground water percolation or soils are of an unstable type. Side or diagonal subdrains shall be installed where conditions require additional subdrainage. Side drains may require pipe in addition to stone backfill. The required interval for side drains shall be related to ground water conditions. The developer shall be fully responsible for proper subdrainage of all street improvements. The Commission may direct that additional subdrainage be added where conditions warrant. Subdrains shall generally be drained to storm sewer catch basins, inlets, or manholes, or to natural drainage channels.
(E) In general, all pavement, base, and subbase (where required) shall conform to the following requirements. It is the intent of these specifications to designate acceptable quality and any substitutions of materials or methods must be approved.
(1) The subbase:
(a) No subbase or other work above subgrade shall be commenced until all sewers, water, drainage and other buried appurtenances are installed and properly backfilled, and the subgrade is inspected and approved.
(b) The subbase (if required) shall be of approved materials as hereinafter designated for bank-run gravel base, and shall be installed and compacted in uniform layers in accordance with Pennsylvania Department of Transportation Specifications, Form 408, current edition, under the section entitled “Subbase”.
(c) The subbase shall be to plan grade, inspected and approved prior to installation of the base course.
(2) The base course:
(a) The base course, except for bank-run gravel, shall conform to, and be installed and compacted in accordance with Pennsylvania Department of Transportation Specifications, Form 408, current edition, for one of the following types:
1. Bituminous concrete base course; or
2. Crushed aggregate base course.
(b) 1. Bank run gravel, when used for base course, shall be local gravels meeting the following sieve analysis, with no shale or consolidated clay:
Sieve Size | Percent Minimum | Percent Maximum |
1-1/2" | 100 | |
#4 | 40 | 90 |
#40 | 10 | 50 |
#200 | 5 | 15 |
2. Bank run materials shall be installed in compacted layers not exceeding six inches in depth, and shall be compacted with a three-wheel roller to 95% of maximum density with the addition of water if necessary. Final rolling shall be with a steel wheeled roller of ten minimum steel weight. Compaction and finishing operations shall be in general conformation with Pennsylvania Department of Transportation Specifications, Form 408, current edition, where applicable.
(c) The base course shall be inspected and approved prior to paving.
(3) The paving:
(a) The paving shall be furnished and installed in accordance with Pennsylvania Department of Transportation Specifications, Form 408, latest edition (including supplements) for one of the following types of paving, (including prime coats and tack coats) as specified in the following table for the various pavement construction types:
1. FJ-1A bituminous surface course;
2. ID-2A bituminous wearing course;
3. ID-2 bituminous binder course;
4. FB-1 bituminous wearing course; and
5. CP-2 binder course bituminous surface treatment.
(b) Tack and prime coats will be required in conformance with Form 408 specifications and as directed by the municipality and/or department.
Minor Streets
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A | B | C | D | E | F | |
Minor Streets
| ||||||
A | B | C | D | E | F | |
Surface courses | ||||||
FJ-1A | 1" | 1" | 1" | – | – | – |
FB-1 | – | – | – | 1" | 1" | 1" |
Binder courses | ||||||
ID-2 | 2" | 2" | 2" | – | – | – |
CP-2 | – | – | – | 3" | 3" | 3" |
Base course | ||||||
Bituminous course | 2" | – | – | 2" | – | – |
Crushed aggregate | – | – | 8" | – | – | 8" |
Bank run gravel | – | 12" | – | – | 12" | – |
Subbase | 4" | – | – | 4" | – | – |
Collector Streets
| |||
A | B | C | |
Collector Streets
| |||
A | B | C | |
Surface courses | |||
ID-2 | 1" | 1" | 1" |
Binder courses | |||
ID-2 | 2" | 2" | 3" |
Base course | |||
Bituminous course | 5" | 3" | – |
Crushed aggregate | – | – | 10" |
Subbase | 6" | 12" | 6" |
Arterial Streets
|
As shall be approved by the city, with state approval where required |
(Ord. 1286, passed 6-7-1982) Penalty, see § 154.999