The drainage plan shall consist of a general description of the project, including sequencing items described in §
425-11, calculations, maps, plans and a consumptive use tracking report. A note on the maps shall refer to the associated computations and erosion and sediment control plan by title and date. The cover sheet of the computations and erosion and sediment control plan shall refer to the associated maps by title and date. All drainage plan materials shall be submitted to the municipality in a format that is clear, concise, legible, neat, and well organized; otherwise, the drainage plan shall not be accepted for review and shall be returned to the applicant. The following items shall be included in the drainage plan:
A. General.
(1) General description of the project, including those areas described in §
425-11.
(2) General description of permanent stormwater management techniques,
including construction specifications of the materials to be used
for stormwater management facilities.
(3) Complete hydrologic, hydraulic, and structural computations for all
stormwater management facilities.
(4) An erosion and sediment control plan, including all reviews and letters
of adequacy obtained by the Conservation District.
(5) A general description of nonpoint source pollution controls.
(6) A consumptive use tracking report as submitted to the Conservation
District.
(7) A detailed operations and maintenance plan in accordance with §
425-30 of this chapter.
B. Maps. Map(s) of the project area shall be submitted on twenty-four-inch-by-thirty-six-inch sheets and/or shall be prepared in a form that meets the requirements for recording at the offices of the Recorder of Deeds of Monroe County. If Chapter
450, Subdivision and Land Development, has more stringent criteria, then the more stringent criteria shall apply. The contents of the map(s) shall include, but not be limited to:
(1) The location of the project relative to highways, municipalities
or other identifiable landmarks.
(2) Existing and final contours at intervals of two feet. In areas of
sleep slopes (greater than 15%), five-foot contour intervals may be
used.
(3) Existing streams, lakes, ponds or other waters of the commonwealth
within the project area.
(4) Other physical features including flood hazard boundaries, buffers,
existing drainage courses, areas of natural vegetation to be preserved,
and the total extent of the upstream area draining through the site.
(5) The locations of all existing and proposed utilities, sanitary sewers,
and water lines within 50 feet of property lines.
(6) The location(s) of public water supply wells and surface water intakes
as well as their source water protection areas.
(7) Soil names and boundaries.
(8) Limits of earth disturbance, including the type and amount of impervious
area that would be added.
(9) Proposed structures, roads, paved areas, and buildings.
(10)
The name of the development, the name and address of the applicant
of the property, and the name of the individual or firm preparing
the plan.
(12)
A graphic and written scale of one inch equals no more than
50 feet; for tracts of 20 acres or more, the scale shall be one inch
equals no more than 100 feet.
(14)
The total tract boundary and size with distances marked to the
nearest foot and hearings to the nearest degree.
(15)
Existing and proposed land use(s).
(16)
A key map showing all existing man-made features beyond the
property boundary that would be affected by the project.
(17)
Locations of all open channels.
(18)
Overland drainage patterns and swales.
(19)
A fifteen-foot-wide access easement to and around all stormwater
management facilities that would provide ingress to and egress from
a public right-of-way.
(20)
The locations of all erosion and sediment control facilities.
(21)
A note on the plan indicating the location and responsibility
for maintenance of stormwater management facilities that would be
located off-site. All off-site facilities shall meet the performance
standards and design criteria specified in this chapter.
(22)
A statement, signed by the applicant, acknowledging that any
revision to the approved drainage plan must be approved by the municipality
and that a revised E&S plan must be submitted to the Conservation
District for a determination of adequacy.
(23)
The following signature block for the design engineer:
"I, (design engineer), on this date (date of signature), hereby
certify that the drainage plan meets all design standards and criteria
of the Brodhead/McMichaels Watershed Act 167 Stormwater Management
Ordinance."
C. Supplemental information.
(1) A written description of the following information shall be submitted.
(a)
The overall stormwater management concept for the project designed in accordance with §
425-11.
(b)
Stormwater runoff computations as specified in this chapter.
(c)
Stormwater management techniques to be applied both during and
after development.
(d)
Expected project time schedule.
(e)
Development stages (project phases) if so proposed.
(f)
An operation and maintenance plan in accordance with §
425-30 of this chapter.
(2) An erosion and sediment control plan.
(3) Completed consumptive use tracking report as specified in §
425-18.
(4) The effect of the project (in terms of runoff volumes and peak flows)
on adjacent properties and on any existing municipal stormwater collection
system that may receive runoff from the project site.
(5) A declaration of adequacy and highway occupancy permit from the PennDOT
district office when utilization of a PennDOT storm drainage system
is proposed.
D. Stormwater management facilities.
(1) All stormwater management facilities must be located on a plan and
described in detail.
(2) When groundwater recharge methods such as seepage pits, beds or trenches
are used, the locations of existing and proposed septic tank infiltration
areas and wells must be shown.
(3) All calculations, assumptions, and criteria used in the design of
the stormwater management facilities must be shown.
The municipality shall require receipt of a complete plan, as
specified in this chapter. For any activities that require an NPDES
permit for stormwater discharges from construction activities, or
a PaDEP joint permit application, or a PennDOT highway occupancy permit,
or any other permit under applicable state or federal regulations,
or are regulated under 25 Pa. Code Chapter 105 (Dam Safety and Waterway
Management) or 25 Pa. Code Chapter 106 (Floodplain Management) of
PaDEP's rules and regulations, the proof of application for said permit(s)
or approvals shall be part of the plan. The plan shall be coordinated
with the state and federal permit process and the municipal SALDO
review process.
A. For those regulated activities which require SALDO approval, the drainage plan and ERSAM shall be submitted by the
applicant as part of the preliminary plan submission.
B. For those regulated activities that do not require SALDO approval, see §
425-19, General requirements.
C. Seven copies of the drainage plan shall be submitted and distributed
as follows:
(1) Two copies to the municipality accompanied by the requisite municipal
review fee, as specified in this chapter.
(2) Two copies to the Conservation District.
(3) One copy to the Municipal Engineer.
(4) One copy to the County Planning Commission.
(5) One copy to the Environmental Advisory Council.
D. Any submissions found incomplete shall not be accepted for review
and shall be returned to the applicant with a notification, in writing,
of the specific manner in which the submission is incomplete.
A disapproved drainage plan may be resubmitted with the revisions addressing the Municipal Engineer's concerns documented in writing and addressed to the Municipal Secretary in accordance with §
425-22 of this chapter and distributed accordingly and be subject to review as specified in §
425-23 of this chapter. The applicable municipal review and inspection fee must accompany a resubmission of a disapproved drainage plan.