[Ord. 621, 2/22/1993, § 201]
No final subdivision or land development plan shall be approved,
no permit authorizing construction issued, or any earthmoving or land
disturbance activity initiated until the final stormwater management
plan for the development site is approved in accordance with the provisions
of this Part.
[Ord. 621, 2/22/1993, § 202; as amended by Ord.
744, 6/9/2003, § 15]
At the time of application, the Borough Engineer shall determine
if the subdivision or land development qualifies as a "small development"
and, therefore, is eligible for a simplified stormwater management
plan submission. For the purposes of this Part, a small development
is as follows:
A.
Any subdivision or land development which results (or will result
when fully constructed) in the creation of 10,000 or less square feet
of impervious surface area may be classified as a small development
and is eligible for a simplified stormwater management plan submission.
Small developments must provide safe management of stormwater runoff
in accordance with the performance standards of this Part and as approved
by the Borough Engineer. Any stormwater management facilities constructed
as part of the development shall be designed to control the peak predevelopment
stormwater runoff for the two-, ten-, and twenty-five-year storm.
The detention facility must be able to safely pass the post development
one-hundred-year storm peak discharge. The facility must provide an
emergency outlet which can discharge the peak runoff for the post
development one-hundred-year storm.
B.
Applications for small developments shall include a plan which describes,
narratively and graphically, the type and location of proposed on-site
stormwater management techniques or the proposed connection to an
existing storm sewer system. The plan should show accurately site
boundaries; contours at five foot intervals for areas of greater than
15% slope gradient and at two foot intervals for areas with less than
15% slope; location of watershed and/or subarea boundaries on the
site (if applicable); and any watercourses, floodplains or existing
drainage facilities or structures located on the site.
C.
The Borough Engineer shall review and approve the proposed provisions
for stormwater management for a small development. Where the applicant
is proposing to connect to an existing storm sewer, the applicant
shall demonstrate that sufficient capacity exists in the storm sewer
from the point of connection to the point of outlet in the natural
drainage system. The Borough Engineer shall determine if the proposed
development site is part of a larger parcel or tract for which a stormwater
management plan was approved previously and, therefore, subject to
any specific stormwater management controls contained in the prior
plan.
D.
For a parcel or tract of land held under single ownership, only one
application for a small development, as defined above, shall be permitted
before requiring a stormwater management plan for the entire parcel.
[Ord. 621, 2/22/1993, § 203; as amended by Ord.
685, 5/11/1998]
1.
General. The following types of land developments may be exempted
from submitting a stormwater management plan upon the recommendation
of the Borough Engineer:
A.
A land development which results in the increase of less than 5,000
square feet of impervious surface area and is located within a watershed
that is no greater than 100 acres and discharges into any waterway(s)
of this commonwealth.
B.
A land development which results in the increase of less than 1,500
square feet of impervious surface area and which lies in an upland
area of the Borough.
2.
Required Documentation. The following documents shall be submitted
prior to receiving an exemption from developing a stormwater management
plan:
A.
Pre- and post-development calculations which shows the amount of
increased impervious area for the land development.
B.
If the land development lies within a FEMA delineated floodplain
of a blueline stream as shown on the USGS map, a copy of the approved
DEP stream encroachment permit and all supporting calculations.
C.
If the land development discharges its runoff into a floodway or
natural or man-made swale or ditch, not a blue line on the USGS map,
and is located upstream of a known area of continuous flooding, the
calculations showing that the increase in the peak water surface elevation
at the point of flooding does not increase.
