The drainage plan shall consist of all applicable
calculations, drawings, maps, and plans. The cover sheet of the computations
and erosion and sedimentation control plan shall refer to the associated
maps by title and date. All drainage plan materials shall be submitted
to the Borough in a format that is clear, concise, legible, neat,
and well organized; otherwise, the drainage plan shall be disapproved
and returned to the applicant. The following items shall be included
in the drainage plan:
A.
General.
(1)
General description of project.
(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)
Drainage plans shall be prepared by a professional
with demonstrated competency in stormwater management and design.
(5)
Drainage plans and related documentation shall contain
the seal and signature of the professional that prepared the plans.
B.
Drawings, maps and plans of the project area shall
be submitted on twenty-four-inch by thirty-six-inch sheets and shall
be prepared in a form that meets the requirements for recording at
the offices of the Recorder of Deeds of Union County. The contents
of the maps shall include, but not be limited to:
(1)
The location of the project relative to highways,
municipalities or other identifiable landmarks.
(2)
Existing contours at intervals of one foot. In areas
of steep slopes (greater than 15%), five-foot contour intervals may
be used.
(3)
Existing streams, lakes, ponds, field delineated wetlands,
or other bodies of water within the project area.
(4)
Other physical features including flood hazard boundaries,
sinkholes, streams, 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)
An overlay showing soil names and boundaries.
(7)
Proposed changes to the land surface and vegetative
cover, including the type and amount of impervious area that would
be added.
(8)
Proposed structures, roads, paved areas, and buildings.
(9)
Final contours at intervals of one foot. In areas
of steep slopes (greater than 15%), five-foot contour intervals may
be used.
(10)
The name of the development, the name and address
of the owner of the property, and the name of the individual or firm
preparing the plan.
(11)
The date of submission.
(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.
(13)
A North arrow.
(14)
The total tract boundary and size with distances
marked to the nearest foot and bearings 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)
Horizontal and vertical profiles of all open
channels, including hydraulic capacity.
(18)
Overland drainage paths.
(19)
A minimum fifteen-foot wide access easement
around all stormwater management facilities that would provide ingress
to and egress from a public right-of-way.
(20)
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.
(21)
A construction detail of any improvements made
to sinkholes.
(22)
A statement, signed by the landowner, acknowledging
the stormwater management system to be a permanent fixture that can
be altered or removed only after municipal approval of a revised plan.
(23)
The location of all erosion and sedimentation
control facilities.
(24)
Where pervious pavement is permitted for parking
lots, recreational facilities, non-dedicated streets or other areas,
pavement construction specifications shall be noted on the plan.
(25)
It shall be the applicant's responsibility to
verify if the site is underlain by limestone. The following note shall
be affixed to all drainage plans and signed and sealed by the engineer,
surveyor, landscape architect or geologist:
|
I, ____________________, certify that this site
and any detention basins located thereon are/are not underlain by
limestone.
|
C.
Supplemental information.
(1)
A written description of the following information
shall be submitted.
(2)
A soil erosion and sedimentation control plan, where
applicable, including all reviews and approvals, as required by PA
DEP.
(3)
A geologic assessment of the effects of runoff on
sinkholes as specified in this chapter.
(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.
A.
The drainage plan shall be submitted by the developer
as part of a preliminary and/or final plan application for subdivision
and land development activity or separately if the activity regulated
by this chapter is not being conducted in conjunction with a subdivision
or land development.
B.
Four copies of the drainage plan and all supplemental
material shall be submitted to the Borough.
A.
The Municipal Engineer shall review the drainage plan
for consistency with this chapter and applicable Act 167 Stormwater
Management Plans. The Borough shall require receipt of a complete
plan, as specified in this chapter.
B.
For activities regulated by this chapter, the Municipal
Engineer shall notify the Borough, in writing, whether the drainage
plan is consistent with this chapter. Should the drainage plan be
determined to be consistent with this chapter, the Municipal Engineer
will forward an approval letter to the Borough Secretary.
C.
Should the drainage plan be determined to be inconsistent
with this chapter, the Municipal Engineer will forward a disapproval
letter to the Municipal Secretary citing the specific sections of
the chapter and reason(s) for the disapproval.
D.
The Municipal Secretary shall forward a copy of the
Municipal Engineer's review of the drainage plan to the applicant
and the Borough Building Permit Officer, Zoning Officer, and Borough
Planning Commission.
E.
For regulated activities requiring a PA DEP joint
permit application, the Municipal Engineer shall notify PA DEP whether
the drainage plan is or is not consistent with this chapter and the
Act 167 Stormwater Management Plan and forward a copy of the review
letter to the Municipality and the developer. PA DEP may consider
the Municipal Engineer's review comments in determining whether to
issue a permit.
F.
The Borough shall not approve any subdivision or land development for regulated activities specified in § 290-6 of this chapter if the drainage plan has been found to be inconsistent with this chapter or the Act 167 Stormwater Management Plan, as determined by the Municipal Engineer.
G.
The Municipal Building Permit and Zoning Officers
shall not issue building and/or zoning permits for any regulated activity
specified in this chapter if the drainage plan has been found to be
inconsistent with this chapter as determined by the Municipal Engineer.
H.
The applicant shall be responsible for completing
record drawings of all stormwater management facilities included in
the approved drainage plan. The record drawings and an explanation
of any discrepancies with the design plans shall be submitted to the
Municipal Engineer for final approval. In no case shall the Borough
approve the record drawings until a copy of an approved Declaration
of Adequacy; Highway Occupancy Permit is received from the PennDOT
District Office, and any applicable permits from PA DEP.
I.
The approval of a drainage plan shall be valid for
a period not to exceed five years. This five-year time period shall
commence on the date that the Borough signs the approved drainage
plan. If stormwater management facilities included in the approved
drainage plan have not been constructed, or if constructed, and record
drawings of these facilities have not been approved within this five-year
time period, then the Borough may consider the drainage plan disapproved
and may revoke any and all approvals and/or permits. Drainage plans
that are considered disapproved by the Borough shall be resubmitted
in accordance with this chapter.
A.
A modification to a submitted drainage plan for a
development site that involves a change in stormwater management facilities
or techniques, or that involves the relocation or redesign of stormwater
management facilities, or that is necessary because soil or other
conditions are not as stated on the drainage plan as determined by
the Municipal Engineer, shall require a resubmission of the modified
drainage plan and a review consistent with this chapter.
B.
A modification to an already approved or disapproved
drainage plan shall be submitted to the Borough, accompanied by the
applicable review fee. A modification to a drainage plan for which
the Borough has not taken a formal action shall be submitted to the
Borough.
A disapproved drainage plan may be resubmitted,
with the revisions addressing the Municipal Engineer's concerns documented
in writing, to the Borough Secretary in accordance with this chapter
and distributed accordingly and is subject to review as specified
in this chapter.
