The following items shall be included in the major SWM site
plan:
A. Project information:
3. Name, address, telephone number, and email address of the applicant
and, if separate from applicant, property owner.
4. Name, address, telephone number, and email address of the qualified
professional responsible for project design.
B. Date of submission and the dates of all revisions.
C. Graphical and written scale on all drawings, maps, details, profiles,
and other items as necessary.
E. Location map at a minimum scale of one inch equals 1,000 feet.
F. Metes and bounds of the entire tract perimeter.
G. Existing and proposed contours at intervals of one foot or two feet.
H. A determination of site conditions in accordance with the BMP Manual.
A detailed site evaluation shall be completed for projects proposed
in environmentally sensitive areas such as brownfields.
I. Soil names, boundaries, and hydrologic soil group classification.
J. Location of all existing and proposed on-site improvements.
K. Location of improvements outside of the property boundary that may
be affected by the project.
L. Location of all existing and proposed utilities and utility easements,
including but not limited to on-lot wastewater facilities, water supply
wells, sanitary sewers, waterlines, gas lines, and electric lines.
M. Location of all sensitive natural features, including waterways, wetlands, floodplains, significant karst features (including but not limited to sinkholes, rock pinnacles, and closed depressions), and natural slopes over 25%. If no sensitive natural features are present on the site, provide a note as listed in § 158-401a.X.9 below, and provide evidence of their absence. See §
158-403C below for further requirements on the identification of wetlands.
N. Location and clear identification of the type of permanent SWM facilities.
O. Proposed limit of disturbance line(s) and disturbed acres.
P. Construction details, specifications, and material schedules including
data necessary for proper construction.
Q. Plan and profile drawings of all ESC, SWM, and conveyance facilities,
including but not limited to basins, drainage structures, pipes, open
channels, sediment traps, and swales.
1. Plans and profiles for the same facilities shall be displayed together
on the same sheet.
2. All facilities shall be clearly labeled, with labels matching calculations
and designations within the SWM report.
3. All plans and profiles shall provide clear labels of applicable data
necessary for proper construction, including but not limited to inverts,
top-of-grate elevations, pipe slopes, materials, spillway elevations
and widths, outlet structure elevations, orifice sizes and elevations,
basin bottom elevations, etc.
4. Plan and profile drawings may take the place of, supplement, or be
combined with construction details where desired so long as the above
standards and overall design clarity are maintained.
R. An erosion and sediment control plan. Note that further review by the county conservation district/reviewing authority may be required per §
158-301N.
S. An O&M plan for all existing and proposed physical stormwater
management facilities. This plan shall address short-term and long-term
responsibilities for O&M as well as schedules for O&M activities.
T. SWM conservation easements for all physical SWM facilities, conveyance
facilities, areas downstream of discharges and spillways, and designated
meadows. When present, provisions for permanent access to SWM conservation
easements shall also be granted to the municipality via a note as
listed in § 158-401a.X.10 below.
1. Easements shall be a minimum of 20 feet in width and must extend
at least five feet beyond the edge of any SWM facility.
2. Where possible, easements should be centered on the facilities within
the easement.
3. Nothing shall be placed, stored, erected, constructed over, planted,
or otherwise located within an easement other than the SWM facilities
within the easement. If SWM conservation easements are required on
the site, provide a note stating such as listed in § 158-401a.X.11
below.
4. Easements shall be identified with metes and bounds. In the case
of conveyance facilities such as pipes and swales, and if desired
by the applicant, a note as listed in § 158-401a.X.12 below
may be added to the plan in lieu of metes and bounds stating that
easements are to be located and offset from the center of the installed
conveyance facility. Subterranean facilities utilizing this alternative
easement identification method shall use metal marking tape, or other
methods that provide simple identification from the surface as reviewed
and accepted by the Municipal Engineer, in order to mark the location
of said facilities; subsurface conveyance facilities shall add the
identification method to the note required above, and the identification
method shall be added to relevant construction details.
5. Roof leader manifolds and discharges shall also require SWM conservation
easements, but may be sized less than 20 feet in width, and are exempt
from the requirements in § 158-401a.T.3 above so long as
the items above the manifolds and/or discharges do not negatively
affect their function.
U. For SWM site plans involving two or more lots, an assignment of impervious
area to each individual lot that may not be exceeded at the time of
construction and is accounted for in the SWM report.
V. A list of any permits or authorizations related to stormwater management,
erosion and sediment control, waterways and wetlands, or other relevant
plan authorizations/permits other than those required by the municipality,
including but not limited to Conservation District adequacy letters;
NPDES permits; PADEP/ACOE water obstruction and encroachments permits;
FEMA CLOMR/LOMRs; PNDI clearances; PennDOT HOP approvals when the
proposed project encroaches into or impacts a PennDOT right-of-way;
and other appropriate permits as determined by the municipality. The
reviewing authority for each permit shall also be included in this
list. If no outside permits are required, provide a note as listed
in § 158-401a.X.13 below.
W. Reasonable and appropriate design, plan, and drafting requirements
from the municipality's Subdivision and Land Development and
Zoning Ordinance (for example, clear sight triangle, setbacks, etc.) shall
be followed in preparing the SWM site plan.
X. Notes, signature blocks, and certifications:
1. "(Municipal Engineer or municipal designee), on this date, (signature
date), has reviewed and hereby certifies that the SWM site plan appears
to meet all design standards and criteria of the stormwater management
ordinance. Strict compliance with the stormwater management ordinance,
however, is the responsibility of the applicant."
2. "(Applicant or owner), on this date, (signature date), acknowledges
that SWM and conveyance facilities are permanent fixtures and may
not be modified, removed, filled, landscaped, or otherwise altered
without written approval of Palmer Township."
3. "(Qualified professional responsible for project design), on this
date, (signature date), certifies that this plan complies with the
ordinances, provisions, and regulations of the municipality and any
other applicable entities." A seal with dated signature shall accompany
this statement.
4. "All design and construction shall comply with the PADEP E&S
Manual, PADEP BMP Manual, PennDOT Publication 408, and PennDOT Publication
72M, all as amended and updated, unless written requests for deviation
have been reviewed and explicitly approved by the Municipal Engineer."
5. "Palmer Township is not responsible for the maintenance of any area
not dedicated to and accepted for public use."
6. "The operation and maintenance agreement is a part of the plan. If
the owner fails to adhere to the terms of the agreement, the municipality
may perform the services required and charge the owner appropriate
fees."
7. If conveyance facilities are proposed that require watertight joints,
"All stormwater conveyance facilities shall be constructed with watertight
joints."
8. If inlets or other structures are proposed, "The knocking out of
inlet or other structure corners is prohibited."
9. If no sensitive natural features are present on the site per § 158-401a.M
above, "(Qualified professional responsible for project design), on
this date, (signature date), certifies that there are no sensitive
natural features on the project site, including waterways, wetlands,
floodplains, significant karst features, and natural slopes over 25%."
10.
If SWM conservation easements and/or riparian buffer easements are required on the site per §
158-303C and/or § 158-401a.T above, "The landowner hereby grants permission to the municipality, its authorized agents, and employees access to any and all SWM conservation easements and riparian buffer easements on the property."
11.
If SWM conservation easements are required on the site per § 158-401a.T
above, "Nothing shall be placed, stored, erected, constructed over,
planted, or otherwise located within an easement other than the SWM
facilities within the easement."
12.
If any easements on the site are to be located based upon the
location of conveyance facilities per § 158-401a.T.4 above,
"SWM conservation easements for conveyance facilities shall be located
and offset from the center of the respective conveyance facility as
installed." If the conveyance facilities are subterranean, also add,
"Underground conveyance facilities can be identified from the surface
via (identification method)."
13.
If no outside permits are required per § 158-401a.V
above, "(Qualified professional responsible for project design), on
this date, (signature date), certifies that no stormwater management,
erosion and sediment control, waterways and wetlands, and/or other
relevant plan authorizations/permits are required other than those
of the municipality."
14.
If an as-built plan is required per §
158-410 below, "A copy of the recorded as-built plan will be provided to the municipality prior to occupancy and/or the release of financial security."
15.
"The SWM report is a part of the plan."
16.
If an indemnification statement is required for carbonate site conditions per §
158-403B below, "The applicant, including its agents, heirs, assigns and anyone on behalf of whom the application is submitted, does hereby indemnify, defend, and hold harmless Palmer Township and its respective assigns, officials, officers, employees, and agents, from and against any and all demands, claims, actions, or causes of action, assessments, losses, damages, liabilities, costs, and expenses, including reasonable fees and expenses of counsel, other expenses of investigation, handling, and litigation, and settlement amounts, together with interest and penalties asserted against, resulting to, imposed upon, or incurred by the applicant and anyone on behalf of whom the application is submitted or raised against the Township, directly or indirectly, by reason of, resulting from, or arising in connection with any result from carbonate site conditions."
17.
If an indemnification statement is required for the utilization of infiltration SWM BMPs per §
158-403C below, "The applicant, including its agents, heirs, assigns and anyone on behalf of whom the application is submitted, does hereby indemnify, defend, and hold harmless Palmer Township and its respective assigns, officials, officers, employees, and agents, from and against any and all demands, claims, actions, or causes of action, assessments, losses, damages, liabilities, costs, and expenses, including reasonable fees and expenses of counsel, other expenses of investigation, handling, and litigation, and settlement amounts, together with interest and penalties asserted against, resulting to, imposed upon, or incurred by the applicant and anyone on behalf of whom the application is submitted or raised against the Township, directly or indirectly, by reason of, resulting from, or arising in connection with the utilization of infiltration SWM BMPs."
The following items shall be included in the minor SWM site
plan:
A. Project information:
3. Name, address, telephone number, and email address of the applicant
and, if separate from the applicant, the property owner.
4. Name, address, telephone number, and email address of the qualified
professional responsible for project design.
B. Date of submission, and the dates of all revisions.
C. Graphical and written scale on all drawings, maps, details, profiles,
and other items as necessary.
E. Location of all existing and proposed on-site improvements.
F. Approximate location of all existing and proposed utilities and utility
easements, including but not limited to on-lot wastewater facilities,
water supply wells, sanitary sewers, waterlines, gas lines, and electric
lines.
G. Location and clear identification of the type of permanent SWM facilities.
H. Proposed limit of disturbance line(s) and disturbed acres.
I. An erosion and sediment control plan. Note that further review by the county conservation district/reviewing authority may be required per §
158-301N.
J. SWM conservation easements for all physical SWM facilities, conveyance
facilities, areas downstream of discharges and spillways, and designated
meadows. When present, provisions for permanent access to SWM conservation
easements shall also be granted to the municipality via a note as
listed in § 158-401a.X.10 above.
1. Easements shall be a minimum of 20 feet in width and must extend
at least five feet beyond the edge of any SWM facility.
2. Where possible, easements should be centered on the facilities within
the easement.
3. Nothing shall be placed, stored, erected, constructed over, planted,
or otherwise located within an easement other than the SWM facilities
within the easement. If SWM conservation easements are required on
the site, provide a note stating such as listed in § 158-401a.X.11
above.
4. Easements shall be identified with metes and bounds. In the case
of conveyance facilities such as pipes and swales, and if desired
by the applicant, a note as listed in § 158-401a.X.12 above
may be added to the plan in lieu of metes and bounds stating that
easements are to be located and offset from the center of the installed
conveyance facility. Subterranean facilities utilizing this alternative
easement identification method shall use metal marking tape, or other
methods that provide simple identification from the surface as reviewed
and accepted by the Municipal Engineer, in order to mark the location
of said facilities; subsurface conveyance facilities shall add the
identification method to the note required above, and the identification
method shall be added to relevant construction details.
5. Roof leader manifolds and discharges shall also require SWM conservation
easements, but may be sized less than 20 feet in width, and are exempt
from the requirements in § 158-401a.T.3 above so long as
the items above the manifolds and/or discharges do not negatively
affect their function.
K. If stormwater BMP(s) described in Appendix C are proposed, the applicable
worksheet(s) from Appendix C shall be submitted with the minor SWM
site plan. If a BMP type not described in Appendix C is used, a SWM report conforming to the requirements of §
158-402 shall be submitted with the minor SWM site plan.
The following items shall be included in the SWM report:
A. Project information:
3. Name, address, telephone number, and email address of the applicant
and, if separate from the applicant, the property owner.
4. Name, address, telephone number, email address, seal, and dated signature
of the qualified professional responsible for project design.
B. A narrative describing the predevelopment conditions, post-development
conditions, philosophy of SWM design, and project time schedule.
C. A map identifying the Stormwater Management District boundaries applicable
to the site according to the relevant Act 167 stormwater release rate
map.
D. Stormwater runoff design computations and documentation demonstrating that the requirements of this ordinance have been met for all watersheds and subwatersheds, including but not limited to the recommendations, standards, and calculation methodologies specified in Article
III. This information shall also include but not be limited to the following:
1. Summary tables of existing and proposed peak rates, and, where required,
relevant Act 167 stormwater release rate reductions.
2. For applicable SWM facilities, a plotting and tabulation of the storage
volumes and discharge curves with corresponding water surface elevations,
inflow hydrographs, and outflow hydrographs.
3. For applicable conveyance facilities, a tabulation of open or closed
channel flow data, including but not limited to shear stress, erosion,
provided freeboard, Manning's N values, etc. (open channel conveyance),
and hydraulic grade lines, top-of-grate elevations, pipe sizes, crown
and invert elevations, materials, etc. (closed channel flow).
4. Breakouts of Tc calculation segments and input data for each segment,
including but not limited to slope, length, Manning's N values,
etc.
5. Summary tables of curve number (CN) or runoff coefficient (C) calculation
averages for all watersheds and/or subwatersheds.
6. Summary tables of TR-55 precipitation frequency estimates or Rational
Method intensity values utilized for design.
7. A plotting or tabulation of the rainfall depths or intensities used
in modeling.
8. Supporting calculations as necessary for any ESC facilities.
9. For regulated activities utilizing multiple SWM BMPs in series and
requiring SWM permits in the Bushkill Creek, Nancy Run or Fry's
Run watersheds, a narrative description of the required treatment
train shall be provided within the SWM report and shall detail the
total area of runoff received, total volume treated, the total pollutants
removed by the SWM BMPs, and the location of the SWM BMPs within the
treatment train.
10.
The municipality has the authority to require that any calculations
or modeling be reconciled with field observations, conditions, and
site history.
11.
Applicable worksheets from other regulatory agencies and associated
permits (BMP Manual, NPDES, etc.).
12.
Applicable loading rates.
E. Watershed/subwatershed maps, which shall include:
1. All points of interests being used in modeling.
2. Existing and proposed watersheds and subwatersheds, including labeling
that matches calculations and designations within the SWM report.
3. Time of concentration (Tc) paths.
4. Inlet drainage areas with labels corresponding to receiving inlets.
5. Facility labeling that matches calculations and designations within
the SWM site plan and SWM report.
A modification to a submission with minor deficiencies shall require a resubmission of the modified SWM site plan and report in full in accordance with this article. If modifications require updates to other components of the submission as determined by the municipality, including but not limited to the O&M agreement or further waiver requests, said components shall also be submitted. Any modifications shall renew the forty-five-day notification timeline as listed in §
158-405B above.
A disapproved SWM site plan may be resubmitted to the municipality
and Municipal Engineer, with the revisions addressing the municipality's
concerns, in accordance with this article. A resubmitted SWM site
plan shall include all other submission components in full, including
applicable review fees.
A request for modification to a SWM site plan that has already
been approved shall be in writing. The written request shall provide
specific details on what portions of the SWM site plan are being proposed
for modification, and shall be accompanied by submission components
showing the proposed modifications as required by the municipality.
Any modifications within the updated submission not matching the written
request are considered void.
Requests for modification shall follow the submission review process per §
158-405 above, including the payment of applicable fees. Modifications may not alter stormwater management facilities in a manner which significantly affects the discharge of stormwater to an adjacent property and/or significantly relocates a stormwater management facility within the project site; requests for modifications of this nature shall be treated as new submissions in accordance with this article.
The municipality reserves the sole right to deny requests for
modification and require new submissions in accordance with this article
upon review of the extent of the requested modifications.
The municipality's approval of a SWM site plan and issuance of a SWM permit authorizes the regulated activities contained in the SWM site plan for a maximum term of validity of five years following the date of approval. Terms of validity shall commence on the date the municipality issues the SWM permit. If an approved SWM site plan is not completed according to §
158-410 within the term of validity, then the municipality may consider the SWM site plan disapproved and may revoke any and all permits without the necessity of any proceedings for revocation. SWM site plans that are considered disapproved by the municipality shall be resubmitted in accordance with §
158-407 of this ordinance.