A.
From and after the date of enactment of this chapter, a stormwater
management plan and other information specified herein shall be submitted
to the municipality for all lands subdivided or for which land development
plans are prepared after the enactment of this chapter. A stormwater
management plan and other information specified herein shall be submitted
at the same time and together with submission of a preliminary subdivision
or land development plan, along with a completed checklist supplied
by the municipality indicating the items contained within the submission.
B.
Such plans and information shall be considered part of said zoning
and subdivision documents and shall be reviewed in accordance with
procedures established thereunder. Preliminary approval or final approval
of a subdivision or land development plan or the issuance of a zoning
permit shall be contingent upon submission of a stormwater management
plan and other materials specified herein and approval of the stormwater
management plan in accordance with provisions of this chapter.
C.
All stormwater management plans shall be submitted to the Municipal
Engineer for review and comment. Such review shall include a statement
by the Municipal Engineer specifying the provisions of this chapter
which have not been met by the plan as submitted.
D.
Once a stormwater management plan has been approved together with
a subdivision or land development plan approval or together with the
issuance of a zoning permit, said stormwater management plan shall
be valid only for the subdivision, land development, or zoning permit
approved. Any further development on the lot or lots requiring a revision
of the approved plan or other construction or activities as defined
by municipal zoning regulations shall require the submission of a
new, amended or revised stormwater management plan and other information
specified herein.
The stormwater management plan shall consist of all applicable
calculations, maps and plans. A note on the maps shall refer to the
associated computations and erosion and sediment pollution control
plan by title and date. The cover sheet of the computations and erosion
and sediment pollution control plan shall refer to the associated
maps by title and date. All stormwater management plan materials shall
be submitted to the municipality in a format that is clear, concise,
legible, neat and well organized; otherwise, the stormwater management
plan shall be disapproved and returned to the applicant. Said plan
shall be prepared by a registered professional land surveyor, qualified
geologist, landscape architect, architect or engineer licensed in
the State of Pennsylvania, with said preparer's seal and registration
number affixed to the plan. The following items shall be included
in the stormwater management plan:
A.
Stormwater management report.
(1)
General description of project.
(2)
General description of permanent stormwater management techniques,
including construction specifications and materials to be used for
stormwater management facilities.
(3)
Complete hydrologic, hydraulic and structural computations for all
stormwater management facilities.
(4)
A written maintenance plan for all stormwater features, including
detention facilities and other stormwater management elements.
(5)
Identification of ownership and maintenance responsibility for all
permanent stormwater management facilities.
(6)
The stormwater management report must include a narrative which clearly
discusses the project and summary tables which, at a minimum, provides
the following information.
(a)
Narrative.
[1]
The overall stormwater management concept.
[2]
The expected project schedule.
[3]
Location map.
[4]
Total site area — pre and post, which must be equal or
have an explanation as to why they are not.
[5]
Total site impervious area.
[6]
Total off-site areas.
[7]
Number of stormwater management facilities (ponds), if applicable.
[8]
Type of development.
[9]
Predevelopment land use.
[10]
Whether site is underlain by carbonate geology.
[11]
Whether site is a water-quality-sensitive (WQS) development.
[12]
Whether site is in a defined sensitive area.
[13]
Types of water quality and recharge systems used, if applicable.
[14]
Other pertinent information, as required.
(b)
Summary tables.
[2]
Post development.
[a]
Undetained areas, areas to ponds.
[b]
Land use for each subarea.
[c]
Hydrologic soil group (HSG) assumptions, curve
numbers (CN).
[d]
Time of concentration computed for each subarea.
[e]
Post-development peak rate of runoff routed to
ponds and out.
[f]
Pond maximum return period design data, including
maximum water surface elevation, berm elevation, and emergency spillway
elevation.
[g]
Water quality depth and volume requirements.
[h]
Recharge volume requirements.
[i]
Morphology requirements.
[j]
Capture volumes required.
(c)
Reports that do not clearly indicate the above information may
be rejected for review by the municipality's Engineer or representative
and will be returned to the applicant.
B.
Plan requirements. Plans for tracts of less than 20 acres shall be
drawn at a scale of one inch equals no more than 50 feet; for tracts
of 20 acres or more, plans shall be drawn at a scale of one inch equals
no more than 100 feet. Plans shall be submitted on the following sheet
sizes: 18 inches by 24 inches, 24 inches by 36 inches, or 36 inches
by 42 inches. All lettering shall be drawn to a size to be legible
if the plans are reduced to half size. All sheets comprising a submission
shall be on one size. The following information, unless specifically
exempted in writing by the Municipal Engineer, must be shown on the
plans, prepared in a form which meets the requirements for recording
in the office of the Recorder of Deeds of Centre County, Pennsylvania.
The contents of the map(s) shall include, but not be limited to:
(1)
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.
(2)
The date of submission and revision.
(3)
The location of the project relative to highways, municipalities
or other identifiable landmarks.
(4)
Existing contours at intervals of two feet. In areas of steep slopes
(greater than 15%), five-foot contour intervals may be used.
(5)
Existing streams, lakes, ponds or other bodies of water within the
project area.
(6)
Other physical features, including flood hazard boundaries, sinkholes,
closed depressions, wetlands, streams, existing drainagecourses, areas
of natural vegetation to be preserved, and the total extent of the
upstream area draining through the site. In addition, any areas necessary
to determine downstream impacts, where required for proposed stormwater
management facilities, must be shown.
(7)
The locations of all existing and proposed utilities, sanitary sewers,
and waterlines within 20 feet of property lines.
(8)
An overlay showing soil names and boundaries, including rock outcrops.
(9)
Total area of impervious surfaces proposed.
(10)
Proposed structures, roads, paved areas, and buildings.
(11)
Final contours at intervals of two feet. In areas of steep slopes
(greater than 15%), five-foot contour intervals may be used.
(12)
A graphic and written scale.
(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 and the extent
of the watershed or subarea that drains through the project site.
(17)
Horizontal and vertical profiles of all open channels, including
hydraulic capacity.
(18)
Overland drainage paths.
(19)
Access easements 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
and the location of all notes to be posted, as specified in this chapter.
(22)
Complete drainage systems for the site, including details for
construction. All existing drainage features which are to be incorporated
in the design shall be so identified. If the site is to be developed
in stages, a general stormwater management plan for the entire site
shall be presented, with the first stage and appropriate development
stages for the drainage system indicated.
(23)
Location and selected plant material used for vegetative filter
paths to sinkholes and the location of all notices to be posted.
(24)
A statement, signed by the landowner, acknowledging the stormwater
management system is to be maintained in accordance with the approved
ownership and maintenance program and remain a permanent fixture that
can be altered or removed only after approval of a revised plan by
the municipality.
(25)
A note indicating that as-built drawings will be provided by
the developer for all stormwater facilities prior to occupancy or
the release of the surety bond.
(26)
The following signature block for the registered professional
preparing the stormwater management plan:
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"I, __________, hereby certify that the stormwater management
plan meets all design standards and criteria of the Bellefonte Borough
Stormwater Management Ordinance."
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(27)
The following signature block for the Borough Engineer reviewing
the stormwater management plan:
|
"I, __________, have reviewed this stormwater management plan
in accordance with the design standards and criteria of the Bellefonte
Borough Stormwater Management Ordinance."
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(28)
The location of all erosion and sedimentation control facilities.
C.
Supplemental information.
(1)
A soil erosion and sediment pollution control plan, where applicable,
including all reviews and approvals, as required by PADEP.
(2)
Soils investigation report, including boring logs, compaction requirements,
and recommendations for construction of detention basins.
(3)
Karst features identification and analysis reports and a hydrogeologic
assessment of the effects of runoff on sinkholes.
(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.
(6)
All permits required by the Pennsylvania Department of Environmental
Protection and Army Corps of Engineers and other regulatory agencies.
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)
A sketch of the berm embankment and outlet structure indicating
the embankment top elevation, embankment side slopes, top width of
embankment, emergency spillway elevation, perforated riser dimensions,
pipe barrel dimensions and dimensions and spacing of antiseep collars.
(b)
Design computations for the pipe barrel and riser.
(c)
A plot or table of the stage-storage (acre-feet vs. elevation)
and all supporting computations.
(d)
Flood routing computations.
(e)
A detailed plan of the trash rack and anti-vortex device.
(4)
Record set (as-built) plans. At the completion of the project, and
as a prerequisite for the release of the guarantee or issuance of
an occupancy permit, the owner or his representative shall:
(a)
Provide certification of completion from a registered professional
verifying that all permanent facilities have been constructed according
to the plans and specifications and approved revisions thereto; and
(b)
Provide a set of approved stormwater management plan drawings
showing all approved revisions and elevations and inverts to all manholes,
inlets, pipes and stormwater control facilities.
For all activities regulated by this chapter, the steps below
shall be followed for submission. For any activities that require
a PADEP joint permit application and regulated under Chapter 105 (Dam
Safety and Waterway Management) or Chapter 106 (Floodplain Management)
of PADEP's Rules and Regulations, require a PennDOT highway occupancy
permit, or require any other permit under applicable state or federal
regulations, the permit(s) shall be part of the plan.
A.
The Municipal Engineer shall review the stormwater management plan
for consistency with the adopted Spring Creek Watershed Act 167 Stormwater
Management Plan. The municipality shall require receipt of a complete
plan, as specified in this chapter.
B.
The Municipal Engineer shall review the stormwater management plan
for any submission or land development against the municipal Subdivision
and Land Development Ordinance provisions not superseded by this chapter.
C.
For activities regulated by this chapter, the Municipal Engineer
shall notify the municipality in writing, within 30 calendar days,
whether the stormwater management plan is consistent with the stormwater
management plan ordinance. Should the stormwater management plan be
determined to be consistent with this chapter, the municipality will
forward an approval letter to the developer with a copy to the Municipal
Engineer.
D.
Should the stormwater management plan be determined to be inconsistent
with this chapter, the municipality will forward a disapproval letter
to the developer with a copy to the Municipal Engineer citing the
reason(s) for the disapproval. Any disapproved stormwater management
plans may be revised by the developer and resubmitted consistent with
this chapter.
E.
For regulated activities specified in § 490-5C of this chapter, the Municipal Engineer shall notify the municipal building permit officer in writing, within a time frame consistent with the municipal building code and/or municipal subdivision ordinance, whether the stormwater management plan is consistent with this chapter and forward a copy of the review letter to the municipality, who will issue an approval/disapproval letter to the developer. Any disapproved stormwater management plan may be revised by the developer and resubmitted consistent with this chapter.
F.
For regulated activities requiring a PADEP joint permit application,
the Municipal Engineer shall notify PADEP whether the stormwater management
plan is consistent with this chapter and forward a copy of the review
letter to the municipality and the developer. PADEP may consider the
Municipal Engineer's review comments in determining whether to
issue a permit.
G.
The Municipal Engineer shall not approve any subdivision or land development for regulated activities specified in § 490-5 of this chapter if the stormwater management plan has been found to be inconsistent with the chapter. All required permits from PADEP must be obtained prior to approval. Plans shall be subject to review by the Borough Planning Commission as provided by the Bellefonte Borough Subdivision and Land Development Ordinance.
H.
Unless otherwise directed by the municipality, the municipal building permit office shall not issue a building permit for any regulated activity specified in § 490-5 of this chapter if the stormwater management plan has been found to be inconsistent with this chapter, as determined by the Municipal Engineer, or without considering the comments of the Municipal Engineer. All required permits from PADEP must be obtained prior to issuance of a building permit.
I.
The developer shall be responsible for completing an "as-built survey"
of all stormwater management facilities included in the approved stormwater
management plan. The as-built survey 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 municipality approve the
as-built survey until the municipality receives a copy of an approved
declaration of adequacy, highway occupancy permit from the PennDOT
District Office, and any applicable permits from PADEP.
J.
The municipality's approval of a stormwater management plan shall be valid for a period not to exceed five years. This five-year time period shall commence on the date that the municipality signs the approved stormwater management plan. If stormwater management facilities included in the approved stormwater management plan have not been constructed or if an as-built survey of these facilities has not been approved within this five-year time period, then the municipality may consider the stormwater management plan disapproved and may revoke any and all permits. Stormwater management plans that are considered disapproved by the municipality shall be resubmitted in accordance with § 490-26 of this chapter.
A.
A modification to a submitted stormwater management 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 stormwater management plan as determined by the Municipal Engineer, shall require a resubmission of the modified stormwater management plan consistent with § 490-23 of this chapter and be subject to review as specified in § 490-24 of this chapter.
B.
A modification to an already approved or disapproved stormwater management
plan shall be submitted to the municipality, accompanied by the applicable
review. A modification to a stormwater management plan for which a
formal action has not been taken by the municipality shall be submitted
to the municipality accompanied by the applicable municipality review
fee.
A disapproved stormwater management plan may be resubmitted, with the revisions addressing the Municipal Engineer's concerns documented in writing, to the Municipal Engineer in accordance with § 490-23 of this chapter and be subject to review as specified in § 490-24 of this chapter. The applicable municipality review fee must accompany a resubmission of a disapproved stormwater management plan.
