See Chapter
247, Grading and Excavation, for latest ordinance requirements.
A. Streets shall be constructed to grades and cross sections as cited on, and presented with, the plans and street profiles, in conformance with Township specifications. (See §
380-19J.)
B. Street shoulders shall be graded to the full width of the street
right-of-way (minimum 50 feet) in accordance with Township construction
standards, and thoroughly compacted by rolling all shoulders. The
Planning Commission may recommend, and the Supervisors may approve,
a lessening of this requirement where the preservation of unique environmental
features or mature plant materials are threatened.
C. The subgrade of a street shall be brought to the proper grade and
contour, and shall be rolled and cross rolled. All soft spots shall
be removed. These soft spots shall be recompacted with a suitable
firm material, approved by the Township Engineer, before the placing
of any base material.
D. No base course shall be placed until the subgrade has been inspected
and approved by the Township.
Local and collector access streets shall be constructed in accordance
with Appendix No. 1, which is a part of this chapter.
Street name signs and traffic control signs, as specified by
the Township Board of Supervisors, shall be installed at each street
intersection in accordance with the type of materials, designs and
standards officially established for use throughout the Township.
All storm drainage facilities shall be adequately designed for
the anticipated runoff when the area is fully developed, using criteria
or other methods approved by the Township Engineer. Storm drainage
facilities shall comply with, but are not limited to, the following:
A. Storm sewers shall be located in the street right-of-way or in designated
drainage easements.
B. All pipe culverts and related installations used in the construction
of storm sewers shall be in accordance with standards and specifications
of the Township, county and state, as designated and approved by the
governing body and Township Engineer.
C. Manholes or inlets will generally be required at changes in alignment
and grade. Stormwater inlet spacing shall not exceed 400 linear feet
from center to center. (See Appendix No. 1.)
D. At no time will roof drains or foundation drains be allowed to be
connected to a sanitary sewer system.
E. Any springs encountered during construction shall be piped and connected
to the storm sewer system or extended to a natural watercourse as
may be approved by the Township Engineer.
F. Concrete headwall and splash aprons shall be constructed at the outfall
of all storm sewers. Where watercourses are piped and filled, concrete
headwalls and splash aprons shall be constructed at both ends of the
pipe. (See Appendix No. 1.)
G. Whenever construction stops, alters or concentrates the natural flow
of surface drainage in any manner that affects adjoining parcels,
plans shall be submitted that detail proposals for handling said water
runoff. All such plans shall be subject to the approval of the Township
Engineer and shall meet all applicable federal, state and local criteria,
policies, rules and regulations.
H. All bridges and culverts shall be designed to support expected loads
and to carry expected flows, and shall meet the current specifications
and standards of the Commonwealth of Pennsylvania, Department of Transportation.
I. A complete stormwater management plan of the subdivision site plan shall be submitted, including all necessary storm sewers and appurtenances, the design of which is based on a minimum twenty-five-year storm frequency, except in those areas where, in the judgment of the Township Engineer or governing body, the likelihood of exceptional damage resulting from stormwater is such that additional design criteria is required. The drainage plan shall show the method of drainage of adjacent and contiguous territory and the method of disposal of all stormwater collected. The drainage plan shall be accompanied by design calculations. (See Chapter
369, Stormwater Management, for latest stormwater regulations.)
J. The storm drainage system shall be provided as necessary to:
(1) Discharge stormwater runoff into common natural watercourses. All
stormwater grates will be ASHA-approved.
(2) Adequately drain all low points along streets.
(3) Intercept street stormwater runoff at intervals related to the extent
and grade of the area drained.
(4) Provide positive drainage away from sewage facilities.
(5) Handle existing off-site runoff through the subdivision.
(6) Insure safe and proper disposal of stormwater where open watercourses
are planned, through adequate safety, erosion and aesthetic measures.
K. Stormwater management shall meet all state, county and local standards.
Structures shall be constructed consistent with Appendix No. 1, which is a part of this chapter, unless changes are authorized
by the Board of Supervisors.
L. The stormwater management plan shall be designed such that the post-development peak runoff rates from the site at each point of discharge never exceed the predevelopment rates based on the two-, five-, ten-, fifteen-, twenty-, twenty-five- and 100-year storm events or other design storms as may be required by the Township Engineer. (See Chapter
369, Stormwater Management, for more specific requirements.)
M. All stormwater roof drains must tie into a piped stormwater system
and not discharge directly to a roadway or existing ground.
Monuments shall be placed in all subdivisions as determined
by the Township Engineer. Monuments shall be permanent reference monuments
of a size and material as delineated in Appendix No. 1 of this chapter. Iron pins shall be placed at all subdivision boundary
corners, angle points, points of curvature, lot corners, and intermediate
points as determined by the Township Engineer.
Should the subdivider plan to provide trees, their proposed
location, spacing and species must be submitted for approval to the
governing body.