A. 
Required improvements. The minimum improvements shall be as set forth in this article and are summarized in Table 5-1. The Developer is solely responsible for the installation of all such improvements.
B. 
Alternatives. The Supervisors recognize that alternative designs may be prepared and all requests for a variance from the requirements of this article will be considered on an individual basis. Alternate designs must provide capabilities equivalent to the requirements set forth in these sections. In granting such variances, the Supervisors may impose requirements or conditions that they deem fit and proper.
A. 
General. Streets and alleys shall be graded and improved to the grades and dimensions shown on plans, profiles and cross sections submitted by the developer and approved.
B. 
Clearing and grading. The right-of-way shall be graded to the extent shown on the approved cross section. All trees, stumps, roots, muck, organic material, sanitary land fill and similar unstable and/or unsuitable material shall be removed from the subgrade and thereafter backfilled and compacted to the satisfaction of the Township Supervisors.
C. 
Cut and fill. The maximum slope of any earth embankment or excavation shall not exceed one foot vertical to three feet horizontal. The maximum slope of any rock excavation shall not exceed four feet vertical to one foot horizontal. All excavations and embankments shall have a continuous slope to the point of intersection with the natural grade. The slope easement as required by § 450-43H shall have sufficient width to contain the entire required slope.
D. 
Drainage.
(1) 
Parallel and cross drainage facilities shall be properly located, designed and installed to maintain proper drainage of the completed streets. Drainage facilities shall be designed in accordance with the requirements of § 450-45. Proper design and construction in accordance with those requirements may require the use of paved drainage swales to prevent erosion.
(2) 
Consideration shall be given for subgrade drainage of those soils subject to frost heave. Design of the road bed in such locations may require parallel drainage facilities and/or underdrains to properly stabilize the subgrade. Such subgrade drainage facilities shall be subject to the review and approval of the Township Supervisors.
E. 
Subgrade. The design and construction of the road bed shall take cognizance of the supporting capacities of the subgrade, with particular attention to those soils which are subject to frost heave. Unsuitable soils shall be removed and replaced, drained or otherwise stabilized to provide adequate support for the road bed and anticipated loads.
F. 
Subbase course. The subbase course shall consist of material, which conforms in type and is compacted to the depths shown in Table 5-2 of this chapter. All such material shall meet the specifications of PennDOT Publication 408 and any requirements of Barrett Township.
(1) 
All streets shall have the minimum depth of subbase to a minimum cart way width as set forth in Table 7-1.
G. 
Base course. The base course shall consist of material which conforms in type and is compacted to the depths shown in Table 5-2 of this chapter. All such material shall meet the specifications of PennDOT Publication 408 and any requirements of Barrett Township.
H. 
Surface course. The surface course shall consist of bituminous material which conforms in type and is compacted to the depths shown in Table 5-2 of this chapter. All such material shall meet the specifications of PennDOT Publication 408 and any requirements of Barrett Township.
I. 
Shoulders. Shoulders shall be constructed of the material which conforms in type and is compacted to the depth shown in Table 5-2 and to the width shown in Table 7-1 of this chapter.
J. 
Cross section.
(1) 
Travel way and shoulder widths shall conform to the requirements set forth in Table 7-1.
(2) 
Shoulder surfaces shall be graded at a slope of one inch per foot away from the travel way.
(3) 
The travel way surface of tangent sections, and curved sections not required to be superelevated, shall be crowned at 1/4 of an inch per foot away from the center line. Properly superelevated cross sections shall be required on connector and collector streets when the curve radii are less than 500 feet. The maximum permissible superelevation shall be 0.08 foot per foot.
(4) 
See Figure 5-1[1] for a typical road cross section.
[1]
Editor's Note: Figure 5-1 is included as an attachment to this chapter.
(5) 
The maximum slope of a roadway cross section between the edge of a shoulder and the bottom of an adjoining parallel drainage swale shall not exceed one foot vertical to three feet horizontal.
K. 
Curbs.
(1) 
Curbing may be required to physically separate parking areas from streets or to intercept storm drainage and convey it for proper disposal. The requirements will be evaluated on a site basis and will be at the discretion of the Supervisors with recommendations by the Planning Commission.
(2) 
Curbs will be constructed of Portland cement concrete, 21 inches in depth, six inches wide, with an exposed face of six inches to eight inches. Expansion joints shall be provided at least every 20 feet.
L. 
Driveway entrances. All driveways shall provide for adequate drainage parallel to the street across or under the driveway. Sheet flow of water from the driveway to the street shall be prohibited. The shoulder grade and flow line of the street shall not be interrupted.
M. 
Guide rails. Guide rails shall be required along all embankments five feet or more in height above the natural level of the adjacent terrain. Guide rails shall be of the strong post type designed in accordance with PennDOT Publication No. 13, "Highway Design Manual, Part 2" and shall conform to specifications contained in PennDOT Form 408.
N. 
Bridges and stream crossings. Bridges and other stream crossing structures, which are part of the proposed street system, shall be designed and constructed in accordance with current PennDOT standards and specifications. Evidence of compliance with and approval by DEP and/or the Corps of Engineers shall be provided, if applicable.
A. 
All storm drains and drainage facilities, such as gutters, inlets and culverts, shall be installed and the land graded for adequate drainage as shown on the drainage plan submitted and approved with the preliminary and final plans.
B. 
All proposed drainage swales and natural watercourses which are shown to be relocated on the drainage plan shall be installed and the land graded for adequate drainage.
C. 
Drainage plans shall be prepared in accordance with § 450-45.
D. 
Where the conveyance of stormwater and/or the prevention of erosion cannot be accomplished satisfactorily by surface drainage facilities, an adequate storm sewer system consisting of inlets and other underground drainage structures with approved outlets shall be constructed.
E. 
Outlets shall be approved by the owners of properties affected, by the Commission and by the Board of Supervisors.
F. 
Exposed surfaces in all parts of the subdivision shall be paved or covered with stone screenings, or other solid material, or protected with a vegetative growth that is capable of preventing soil erosion and the emanation of dust during dry weather. The vegetative cover shall not be poisonous in nature.
A. 
Monuments and markers shall be placed so that the center or a scored or marked point shall coincide exactly with the intersection of the lines to be marked.
B. 
Monuments shall:
(1) 
Consist of either:
(a) 
A two-inch galvanized pipe filled with concrete at least 36 inches in length.
(b) 
Four-inch plastic pipe filled with concrete at least 36 inches in length.
(c) 
Such other monument as the Township Engineer or Planning Commission may approve.
(2) 
Be placed flush with the ground, including the rod or pipe and the concrete.
(3) 
Not be placed until road grading has been completed.
(4) 
Be located as follows:
(a) 
Monuments shall be accurately placed at the intersection of all lines forming angles and at changes in direction of lines in the boundary (perimeter) of the property being subdivided where permanent corners did not exist at the time of the boundary survey, except on that portion of the property where only a record plot is required. Where physical or topographical features preclude the placement of monuments at required locations, a monument shall be placed on line as near to the required location as practical. When the boundary lines are in streams, existing roadways or other locations where the placement of monuments is impractical, monuments shall be offset from the line to be monumented and placed not further than 800 feet apart, preferable on lot lines, and referenced to other monuments.
(b) 
All roads shall be monumented on the right-of-way line at the following locations:
[1] 
One in each quadrant of a road intersection. At T-intersections, one shall also be placed at a lot corner most nearly opposite the intersecting road.
[2] 
One at a lot corner on each side of the road approximately midway through the block when the distance between intersecting roads exceeds 800 feet.
[3] 
One on each side of the road near the turnaround on a temporary or permanent cul-de-sac road.
[4] 
One at the intersection of a road right-of-way with an exterior property line.
[5] 
At such other places along the line of roads as may be determined by the Township Engineer to be necessary so that any road may be readily defined in the future.
(5) 
Monuments shall not be required in minor subdivisions.
C. 
Markers shall:
(1) 
Consist of either:
(a) 
Solid steel rods not less than 1/2 inch in diameter or less than 18 inches in length.
(b) 
Steel pipes not less than 3/4 inch in diameter or less than 18 inches in length.
(c) 
A distinct "X" cut or drill hole extending a minimum of 1/4 inch into solid, unfractured rock, provided such rock is at least one cubic yard in size.
(d) 
Such other markers as the Township Engineer may approve.
A. 
Where applicable, sanitary sewers shall be installed to adequately serve all lots with connections to a public or private central system and shall be subject to inspection by the Township Engineer and approval by the Board of Supervisors.
B. 
Central sewage systems shall conform to § 450-46.
C. 
Sewer laterals will be installed from the main line to a plug at the right-of-way line for all lots prior to the installation of the roadway surface course.
A. 
Where applicable, water mains and lines shall be installed to adequately serve all lots with connections to a public or private central system, to include Fire Department connections, and shall be subject to inspection by the Township Engineer and approval by the Board of Supervisors.
B. 
Central water systems shall conform to § 450-47.
C. 
Water laterals will be installed from the main line to a curb stop at the right-of-way line for all lots prior to the installation of the roadway surface course.
A. 
Proposed amenities not mentioned in the preceding subsections shall be designed to preserve the health, safety and welfare of the affected property owners and shall be consistent with good engineering design, and practice.
B. 
All amenities included in the preliminary or final submission shall be considered as required improvements.
Whether the subdivider elects to complete the required improvements prior to approval of the final plan or to post a performance guarantee with the Supervisors, an inspection of such improvements shall be conducted by the Township Engineer and the Roadmaster in accordance with an approved schedule upon their completion to assure that said improvements are satisfactory. The cost of all inspections conducted by the Township shall be borne by the developer.
A. 
Before the Supervisors approve any plan or a section of said plan for recording, the subdivider shall complete all required improvements or shall assure the Township of the completion of the same by means of a proper performance guarantee.
B. 
Performance guarantees shall provide for and secure to the public the completion of all required improvements within one year of the date fixed on the subdivision plan for the completion of such improvements. Any such improvement completion date fixed on the plan shall not extend beyond three years from the date of final plan approval. In all cases, the performance guarantee shall be in accordance with Section 509 of the Municipalities Planning Code.[1]
[1]
Editor's Note: See 53 P.S. § 10509.
C. 
The amount of financial security provided by a performance guarantee shall be equal to 110% of the cost of the required improvement for which financial security is being posted. The cost of the improvement shall be based upon an estimate submitted by the applicant or developer and prepared by a professional engineer licensed in this commonwealth and certified by such engineer to be a fair and reasonable estimate of cost. The municipality, upon the recommendation of the Municipal Engineer, may refuse to accept such estimate for good cause shown.
D. 
If the subdivider requires more than one year from the date of posting of financial security to complete the required improvements, the amount of financial security may be fixed by either of the following methods.
(1) 
The amount of financial security shall be increased by an additional 10% for each one-year period beyond the anniversary date from posting of financial security.
(2) 
The amount of financial security for the first one-year period shall be established as set forth in § 450-30C. On or about the expiration of the preceding one-year period, the subdivider shall submit to the Township a current cost estimate for the required improvements. The amount of financial security for the upcoming one-year period shall be equal to 110% of the cost of completing the required improvements.
E. 
Where the development is projected over a period of years, the Board of Supervisors may authorize submission of final plans by sections or stages of development, subject to such requirements or guarantees as to improvements in future sections or stages as it finds essential for the protection of any finally approved section of the development.
F. 
Partial release from performance guarantee.
(1) 
The developer may request, from time to time, as work progresses, the release of such portions of the financial security necessary for payment to the contractor performing the work.
(2) 
All such requests shall be in writing, by certified mail, addressed to the Board of Supervisors with a copy thereof sent to the Township Engineer. The Board of Supervisors shall have 45 days from receipt of such request within which to allow the Township Engineer to certify, in writing, to the Board of Supervisors that such portion of the work upon the improvements has been completed in accordance with the approved plan and to act upon such request.
(3) 
Accompanying all requests for the release of financial security, there must be a certification to the Board of Supervisors from the developer's engineer that the subject portion of work has been completed in accordance with the approved plans and to Township standards. The certification must be specific in regards to type, amount, and actual location of the work completed. The period of time allocated to the Township for such inspections and action will not begin until such certification has been received by the Township.
(4) 
Upon the Township Engineer's certification, the Board of Supervisors shall authorize the release of an amount of financial security as estimated by the Township Engineer to fairly represent the value of the improvements completed. The Board of Supervisors may, prior to final release at the time of completion and certification by the Township Engineer, require retention of 10% of the estimated cost of the aforesaid improvements.
(5) 
Should the Board of Supervisors fail to act within said forty-five-day period, the Board of Supervisors shall be deemed to have approved the release of funds as requested.
G. 
Release from performance guarantee.
(1) 
When the developer has completed all of the necessary and appropriate improvements, the developer shall notify the Board of Supervisors, in writing, by certified mail, of the completion of the aforesaid improvements and shall send a copy thereof to the Township Engineer. The Board of Supervisors shall, within 10 days after receipt of such notice, direct and authorize the Township Engineer to inspect all of the aforesaid improvements. The Township Engineer shall, thereupon, file a report, in writing, with the Board of Supervisors and shall promptly mail a copy of the same to the developer by certified mail. The report shall be made and mailed within 30 days after receipt by the Township Engineer of the aforesaid authorization from the Board of Supervisors and said report shall be detailed and shall indicate approval or rejection of said improvements, either in whole or in part, and if said improvement, or any portion thereof, shall not be approved or shall be rejected by the Township Engineer, said report shall contain, by reference to sections of this chapter, a statement of reasons for such nonapproval or rejection.
(2) 
A certification, as specified in § 450-30F(3), must be submitted with all requests for the release of financial security.
(3) 
The Board of Supervisors shall notify the developer, in writing, by certified mail, of the action of said Board of Supervisors with relation thereto.
(4) 
If the Board of Supervisors of the Township Engineer fails to comply with the time limitation provisions contained herein, all improvements will be deemed to have been approved and the developer shall be released from all liability, pursuant to its performance guarantee.
(5) 
If any portion of the said improvements are not approved or are rejected by the Board of Supervisors, the developer shall proceed to complete the same and, upon completion, the same procedure of notification, as outlined herein, shall be followed.
(6) 
Prior to final approval of any improvement by the Supervisors, the Supervisors may require the developer to furnish to the Township three complete sets of paper prints and one set of Mylar reproducible as-built drawings of all completed improvements, including but not limited to street plans and profiles, stormwater management plans, sewage systems and water systems, if applicable. All drawings shall be signed and sealed by a professional engineer and/or a professional land surveyor. Drawings shall show the improvements as originally designed and approve with the final plans as well as the improvements after the construction thereof.
H. 
In the event that any improvements which may be required have not been installed as provided in this chapter or in accord with the approved plan, the Board of Supervisors may enforce any corporate bond or other security by appropriate and equitable remedies. If proceeds of such bond, or other security, are insufficient to pay the cost of installing or making repairs or corrections to all the improvements covered by said security, the Board of Supervisors may, at its option, install part of such improvements in all or part of the subdivision and may institute appropriate legal or equitable action to recover the monies necessary to complete the remainder of the improvements. All of the proceeds, whether resulting from the security of from any legal or equitable action brought against the developer, or both, shall be used solely for the installation of the improvements covered by such security and not for any other municipal purposes.