[Amended 7-14-1998 by Ord. No. 973; 6-14-2011 by Ord. No. 11- 1240, § 12]
A. General provisions. All
and
must be designed in conformance with the provisions set forth in the Township Code, Chapter 206, Stormwater Management.
B. Requirements. [Amended 7-14-1998 by Ord. No. 973; 9-14-2004 by Ord. No. 1139]
(1) When required. Stormwater management facilities shall be required to be constructed by the
to take stormwater
and surface water from the bottom of vertical
, the
of which
on both sides toward the bottom; to lead water away from springs; and to avoid excessive
of cross gutters at
intersections and elsewhere.
(2)
.
shall be required along natural
to a minimum width of 25 feet from the center line and may be used for storm and sanitary sewers and as
. Where conditions warrant, such as in
and
, additional width shall be required in such cases where
treatment requires a wider
.
studies must prove such requirements beyond the
or
.
(3) Dedication. Where stormwater or surface water will be gathered within the
or
and discharged or drained in volume over lands within or beyond the boundaries of the
or
, the
,
or
shall reserve or obtain
over all lands affected. The
shall be adequate for such discharge of
and for carrying off of such water and for the maintenance, repair and reconstruction of the same, including vehicles, machinery and other equipment for such purposes, and which shall be of sufficient width for such passage and work. The
,
or
shall convey, at no cost, the
to the Township upon demand.
C. Design.
(1) Computations and design. All computations and design shall be in accordance with the provisions set forth in Township Code, Chapter 206, Stormwater Management. [Amended 7-14-1998 by Ord. No. 973]
(2) Size. Storm drains shall be adequate for the anticipated
when the area is fully developed as permitted by zoning. They shall have a minimum internal diameter of 18 inches and a minimum
of ½ of 1%. [Amended 6-14-2011 by Ord. No. 11-1240]
(3) Change in direction. Manholes or inlets shall be constructed at all changes in horizontal or vertical alignment.
(4) Stormwater roof drains. Direct connections of roof drains to
and stormwater management facilities are prohibited. Roof
shall be infiltrated on
or conveyed into
on the property or to a stormwater management facility through vegetated conveyances. Discharges from roof drains onto sidewalks,
or parking areas or into gutters are prohibited. [Amended 9-14-2004 by Ord. No. 1139]
(5)
from unnatural sources. Water originating from other than natural sources, such as air-conditioning units, sump pumps or other dry weather flow, wherever practicable, shall be connected to the storm
system of the township or discharged into
on the property, at the direction of the Township
. These facilities may not be used for pollution matter. Water from swimming pools or similar
containing chlorine shall be pretreated to remove chlorine to acceptable limits prior to discharge to a
or a township storm sewer system. [Amended 9-14-2004 by Ord. No. 1139]
(6) Streams and
. Changes to natural streams shall be made only when specifically applied for and approved. Realignment must conform to proper hydraulic design and shall involve the dedication of
of adequate width to make feasible future maintenance. Approval of the Pennsylvania Department of Environmen tal Protection will be required prior to any stream changes. When submitting a
involving the construction or realignment of a
, there shall be submitted, in duplicate, copies of the designer’s hydraulic computations. It is the responsibility of any person, corporation or other entity doing any act on or across a communal stream,
or
or upon the
or
during the pendency of the activity and to return it to its original or equal condition after such activity is completed. [Amended 6-14-2011 by Ord. No. 11-1240]
(7) Bridges and culverts. Bridges and culverts shall be designed to meet current Pennsylvania Department of Transportation design criteria and
for construction and shall be constructed to the full width of the
. Waterway openings for
areas exceeding ½ square mile shall be approved by the Division of Dams and Encroachments, Pennsylvania Department of Environmental Resources. When submitting a
involving the construction of bridges or culverts, there shall be submitted, in duplicate, copies of the designer’s computations, both as to hydraulic and structural design.
(8) Construction. All
, including pipe, inlets, manholes, endwalls, trenches,
, ditches and incidental items of work, shall be constructed in accordance with the
of Upper Dublin Township.
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(9) All
showing the proposed storm sewer construction must be accompanied by a complete design submitted by the registered
or surveyor.
(10) When
or
are submitted to the township for approval in sections, a complete stormwater management design for the proposed
and
shall be submitted. The proposed design must include the entire tract and not just a portion. [Amended 9-14-2004 by Ord. No. 1139]
(11) If only a section of
or
is contemplated for construction, the
shall show how he proposes to handle stormwater from this section in order to prevent damage to adjacent properties. If temporary construction is required, the
shall include such
in the
submitted. In the event that such temporary measures cannot ensure protection to adjacent properties, then the main outfall line of the storm sewer shall be included as part of the construction for the proposed section.
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(12) No aboveground stormwater management , as defined by Chapter 206, shall be located within 20 feet of any front, side or rear property line, with the exception of stormwater discharge or conveyance . [Added 4-12-2016 by Ord. No. 16-1316]
(13) No aboveground stormwater management , as defined by Chapter 206, shall be located within 20 feet of any existing or proposed or . [Added 4-12-2016 by Ord. No. 16-1316]
13. Editor’s Note: The Standards are on file in the Public Works Department.
14. Editor’s Note: Former Sec. 4.11., Special
Problems, Flood-Prone Areas and
, which immediately followed this section, was deleted 1-10-1995 by Ord. No. 879. For current provisions, see Ch. 122, Flood Damage Prevention.