Township of Robinson, PA
Allegheny County
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Table of Contents
Table of Contents
All streets or roads proposed to be dedicated for public use shall be designed and constructed according to the requirements presented herein. Design shall be in accordance with ASSHTO Manual "A Policy on Geometric Design of Highways and Streets" (latest revision). Paving will consist of two inches of compacted surface course of modified ID-2 bituminous wearing course installed on a bituminous cement base course (BCBC) and 2A aggregate subbase, materials and construction to be as fully described in PennDOT Form 408 (latest revision), and the shape, width, depth and geometry to conform to the Robinson Township Standard Street Paving Detail Standard Drawing 2-1 and to a horizontal and vertical alignment as approved by the Township Engineer.[1]
[1]
Editor's Note: The Standard Street Paving Detail and other construction drawings are included at the end of this chapter.
All streets or roads shall have a minimum fifty-foot-wide right-of-way. All cartways, defined as "the paved road," shall be a minimum 26 feet wide including wedge curbs as shown on the standard. Sidewalks shall be provided and constructed in accordance with Article III of this chapter.
A. 
Excavation and grading.
(1) 
The excavation or grading required to construct the road shall be constructed to the horizontal and vertical alignment, as approved by the Township Engineer. For approval, roadway design shall be presented on plan and profile drawings prepared at a minimum scale of one inch equals 50 feet horizontal to one inch equals 10 feet vertical with cross sections at fifty-foot centers at appropriate scale. Cross sections shall be a minimum of 100 feet wide or show the entire extent of cut/fill proposed.
(2) 
All excavation and grading operations shall be performed under the direct supervision of a registered professional soils engineer. At completion of the work, the soils engineer shall provide a written sealed certification that all cuts/fills as constructed are stable and suited to their design intent.
(3) 
When filling operations are required, all topsoil shall be removed and the surface scarified in order to assure a good bond between the filled ground and virgin ground. Where the lateral slope upon which a fill is to be made is deemed too steep for scarifying to make bond (slopes three horizontal to one vertical or steeper), the virgin ground shall be benched as shown on the Standard Drawing[1] and the fill placed upon the benches. Drainage for any springs, wet areas, existing streams or wet weather gullies encountered while preparing for filling operations shall be provided before any filling operations can be commenced. Toe drains or underdrains shall be constructed as required by the Township Engineer.
[1]
Editor's Note: The Standard Street Paving Detail and other construction drawings are included at the end of this chapter.
(4) 
Fills shall be built up in six-inch lifts of suitable material, each lift being well-compacted with an approved sheep's-foot ten-ton roller and well-crowned and drained in order to prevent soaking and spongy areas.
(5) 
All fills or cuts shall carry a minimum side slope of two feet horizontal to one foot vertical.
(6) 
Built-up, well-rolled berms shall be constructed along each edge of the paving, using suitable and approved material. The berm shall be constructed before the curb or base is constructed and simultaneously with the fine grading of the subgrade.
(7) 
The subgrade must be well-rolled with approved three-wheel, minimum ten-ton roller, crowned in conformance with finished surface crown and shall be perfectly smooth, free of spongy areas and well drained with approved subgrade drains and/or bleeders, the bleeders draining into approved dry wells (constructed at a minimum distance of three feet from the edge of paving), lateral drains, storm sewers, or drop inlets. The flow lines of all dry wells, lateral drains, storm sewers and drop inlets shall be a minimum of 18 inches below the lowest part of the subgrade. All drainage must be constructed and in operation before any fine grading, berm construction or filling is commenced.
B. 
Subbase and base. The subbase and base shall consist of 11 inches to 13 inches of combined aggregate subbase and BCBC base course as required of the design annual average daily traffic (AADT) count for the site(s) to be served and as presented on Standard 2-1.[2] For single-family residential subdivisions, a minimum of 10 AADT counts per lot per day shall be used to compute the AADT for the site to be developed. In addition, an allowance shall be made for all undeveloped land that can gain access through the proposed roadway. All roads proposed to serve all non-(R-1) uses, and which are to be publicly dedicated, shall be designed to serve an AADT as defined by a traffic study prepared by a consultant acceptable to the Township. Said traffic study shall be approved by the Township Engineer.
[2]
Editor's Note: The Standard Street Paving Detail (2-1) and other construction drawings are included at the end of this chapter.
C. 
Curbing.
(1) 
A compacted eighteen-inch-wide modified bituminous ID-2 wedge-type curb shall be installed on each side of the cartway. The base course portion (first stage) of the eighteen-inch wedge-type curbing shall be installed with the first layer of wearing course.
(2) 
The bituminous wedge curbing shall be machine spread and machine rolled. The dimensions, size and shape to be in accordance with the Standard Drawing 2-1.[3] After placement, the wedge curb shall be properly barricaded and protected from any traffic or vehicles or any kind until it has thoroughly set up and all voids on the grass plot side have been completely backfilled and the backfill being placed with proper and approved tamping equipment in maximum four-inch layers. No traffic or vehicles of any kind will be permitted to pass over this curb except through driveway approaches.
[3]
Editor's Note: The Standard Street Paving Detail (2-1) and other construction drawings are included at the end of this chapter.
D. 
Bituminous wearing course modified ID-2.
(1) 
The surface wearing course shall consist of a two-inch compacted thickness constructed in strict accordance with PennDOT Form 408 (latest revision) requirements, modified as follows:
0.70% liquid asphalt
0.50% sand
0.43% 1B aggregate
(2) 
This surface course is to consist of two compacted one-inch layers of modified ID-2 bituminous wearing surface course over the entire base course and over the curb area. The entire twenty-six-foot width of road shall be finished with this two inches of modified ID-2 wearing surface.
(3) 
The first one-inch wearing surface shall be applied immediately upon installation of the base course. The second one-inch wearing surface shall be applied after the site has been at least 50% occupied with buildings and no heavy equipment will be traveling over the streets and never later than two years after the approval of said base construction by the Township Engineer, or at the discretion of the Board of Commissioners of the Township of Robinson.
(4) 
The surface course shall be machine spread with an approved paver and machine rollers.
E. 
Materials/plant. All bituminous material must be prepared in a plant that has been approved by the Pennsylvania Department of Highways for the manufacture of the material specified. Certification of compliance of all materials used to pave the streets shall be provided to the Township by the plant.
F. 
Testing finished surface. For the purpose of testing the finished surface, a sixteen-foot straightedge shall be used, except that a ten-foot straightedge may be used on vertical curves. The straightedge shall be held in successive positions parallel to the road center line in contact with the surface and the whole area checked from one side to the other as necessary. Advance along the pavement shall be in successive stages of not more than 1/2 the length of the straightedge. Any irregularities which may vary more than 1/4 inch shall be corrected. Irregularities which may develop before the completion of rolling shall be remedied by loosening the surface mixture and removing or adding material as may be required. Should any irregularities or defects remain after the final compression, the surface course shall promptly be removed and sufficient new material laid to form a true and even surface. All minor surface projections, joints and minor honeycombed surfaces shall be ironed smooth to grade, as may be directed.
G. 
Calendar construction limitations. Road construction, such as filling, berming, subgrade, fine-grade construction, base construction or surface construction, shall not be commenced before May 15 and must be completed before October 15 of the same year, unless permission is granted by the Board of Commissioners. It is assumed that the weather conditions between these dates will be ideal for road construction; however, if adverse weather conditions occur between these dates, the contractor or builder must abide by the judgment of the Township Commissioners, their agents or assigns in regard to permissible construction weather conditions.
H. 
Special requirements.
(1) 
The contractor or builder will be required to provide to the Township an eighteen-month maintenance bond commencing on the date of acceptance of the road by the Township in an amount equal to 15% of the actual cost of installation of the roadway.
(2) 
If it is necessary that the contractor must exceed a weight limit of eight tons (which will be in effect simultaneously with the date of acceptance), he will be required to give the Township an additional eighteen-month maintenance bond in an amount specified by the Township Engineer commencing on the date that the violation of the weight limit ceases. In no event shall the contractor violate the weight limit without the expressed approval of the Township and, if approved, not before the aforementioned maintenance bond has been obtained and is in effect.
(3) 
In order to assure the Township that the road is being paved in the center of the right-of-way and in accordance with all grades that have been approved, the contractor, developer and/or road builder must present an affidavit signed by a registered professional engineer or a registered surveyor, each registered to practice his profession in the Commonwealth of Pennsylvania, that he (surveyor/engineer) has established the recorded and/or legal right-of-way on the ground by a survey on the ground and has set construction stakes to the desired construction offset distance at points along the road not exceeding fifty-foot intervals and has established reference elevations on said stakes to effect the construction of the road in accordance with all plans that have been previously approved.
(4) 
After all road construction has been completed and all right-of-way grading has been completed, the developer and/or contractor shall install concrete monuments with a minimum size of four inches in diameter, four inches square and three feet long, extending out of the ground at least three inches but not more than six inches, the center being marked with a one-half-inch-minimum brass wire or bar plug, at all intersections and points of curvature in order to amply mark the right-of-way before the construction of the road can be considered as complete and fully prepared for the Township to accept the maintenance responsibilities.
(5) 
An escrow bond of $150 per concrete monument must be delivered to the Township. When monuments are placed, approved by the developer's engineer and inspected by the Township Engineer, then the escrow bond will be released to the developer.
I. 
Effective date. This part shall become effective on the date of enactment and shall apply to all roads and streets in plans of lots heretofore submitted to and approved by the Township.
J. 
Concrete streets and concrete curb construction roads.
(1) 
Where concrete construction is desired because of heavy or industrial use of the street or road, the design and construction of materials must be approved by the Board of Commissioners and the Township Engineer.
(2) 
The specifications and construction shall comply to Portland Cement Association Recommended Standards, latest edition, titled "Design of Concrete Pavement for City Streets." The standard Township width of street shall be a minimum of 26 feet. A special street width for divided highways in enlarged overall street right-of-way width shall be permitted, but each of said parallel cartways shall have a minimum width of 15 feet including eighteen-inch wedge-type curbs.
[Amended 8-14-1989 by Ord. No. 16-1989]
A. 
Any person violating any provision of this article shall, upon conviction thereof, be sentenced to pay a fine of not more than $600 and costs or, in default of payment thereof, shall be subject to imprisonment for a term not to exceed 30 days, provided that each violation of any provision of this article and each day the same is continued shall be deemed a separate offense.
B. 
In the event of the violation of the provisions of this article by any individual or corporation and when the Township deems it necessary to correct any roads, streets or curbs constructed and/or installed contrary to the provisions of this article, the Township may, at its discretion, immediately repair or cause to be repaired or reconstructed any road, street or curbing at the expense of the violator thereof, and said expenses shall be collected by the Township in any suit at law for correction of the same. In addition, the Township may institute appropriate action at law or equity to restrain, correct or abate threatened or continued violations of this article.