Fillable WAKE SWCPS Stormwater Construction Plan Submittal Checklist (Town of Rolesville)

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WAKE SWCPS Stormwater Construction Plan Submittal Checklist (Town of Rolesville)

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Wake County Environmental Services Department
Water Quality Division, Watershed Management Section
336 Fayetteville St. • P.O. Box 550 • Raleigh, NC 27602
TEL 919 856-7400 • FAX 919 743-4772
SWCPS – Stormwater Construction Plan Submittal Checklist
1
Checklist.docx
Project Name Watershed
New or
Expansion
(N/E)?
Project
Acreage
Existing
Impervious SF
Proposed
Impervious
Disturbed
Acreage
Applicant: Engineer:
Name Name:
Address: Address:
Phone: Phone:
Email: Email:
Construction Plan Review Submittal Package Requirements
Applicant shall select all applicable items below and provide with the submittal.
1. Erosion Control and Stormwater Joint Application (Required to initiate processing)
2. Review Fees (Required to initiate processing)
3. Other documents:
a.
WC ONLY PRELIMINARY ZONING AND SUBDIVISION APPROVAL: Copy of approval notification (property
description, subdivision or COSD approval, or Board of Adjustment approval, etc.)
b.
WC ONLY FLOOD STUDY: Copy of approval notification from Wake County Flood & Stormwater
Environmental Engineer, (if applicable)
c. ENGINEERING APPROVAL: Copy of approval notification for projects in a municipality’s zoning jurisdiction
d. 401/404 Documentation (Buffer determination letters, PCN application, comments, and approval)
e. NCDOT Approval
f. Encroachment agreement(s) completed, signed and notarized for all off-site construction
4.
Cover letter stating the purpose of the submission, describing site drainage, stormwater management
objectives, and how the proposed stormwater management plan will meet the objectives and be implemented
5. Copy of the USGS Quad Map with delineated project limits in color
6. Copy of the Wake County Soil Survey map from the 1970 manuscript with delineated project limits in color
7.
Two (2) copies of the Hybrid Stormwater Tool; digital submittal and hardcopy (Site Data Sheet, Drainage Area
Sheets, Site Summary Sheet, BMP Sheets, and BMP Summary sheet) See the Wake County Stormwater Manual
for guidance.
8. Drainage Area Maps with stormwater discharge points and Tc flow paths (existing/post construction/post BMP)
a.
For Water Supply Watersheds: Provide drainage map showing drainage acres to the drainage features for
properties in the water supply watershed zoning districts
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A Master Team Townhomes
Lower Neuse River
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A Master Team, LLC
(919) 865-9918
halperry@remc.us
JAECO
333 Wade Avenue; Raleigh, NC 27605
(919) 828-4428
info@jaeco.com
6200 Falls of Neuse Road; Suite 10
Raleigh, NC 27609
Wake County Environmental Services Department
Water Quality Division, Watershed Management Section
336 Fayetteville St. • P.O. Box 550 • Raleigh, NC 27602
TEL 919 856-7400 • FAX 919 743-4772
SWCPS – Stormwater Construction Plan Submittal Checklist
2
Checklist.docx
9. 1 set of Stormwater Calculations:
a.
Support data for all stormwater practice designs, such as inflow/outflow rates, stage/storage data,
hydrographs, outlet designs, infiltration rates, water elevations, design output, summary, etc.
b. Other hydraulic and hydrologic computations critical to the plan/designs
c.
Signature, Date And Professional Seal: for all Stormwater design management proposals, i.e. calculations,
BMP designs, operations/maintenance/budget/asbuilt/inspections/manuals.
10. Two (2) copies of a complete set of construction drawings for 1
st
submission, five (5) copies for approval
11.
Draft Stormwater Agreement, Draft Maintenance Agreement, Draft Deed Restrictions / Protective Covenants
Proposal, Draft As Built Plan or performance guarantee paperwork
12. Proposed Site Plan:
a. Location/Vicinity Map
b. North arrow, graphic scale, drafting version date, legend and professional seal
c. Existing and proposed contours: plan and profiles for roadways
d. Boundaries of tract: including project limits
e.
Table with impervious calculations - existing and proposed impervious surfaces: roads, well lots, recreation
sites, single family residences, etc. (consistent with SW Hybrid Tool inputs)
f. Proposed improvements: roads, buildings, parking areas, grassed landscaped, and natural areas.
g. Lot lines, lot numbers, road names, and impervious limit on each lot rounded to nearest whole number
h. Utilities: community water and sewer, plan/profiles, easements and sediment controls, and offsite septic.
i. Stormwater Network: inlets, culverts, swales, ditches, channels and drainage easements.
j. Show all Riparian Buffers [Article 9-21]; (Neuse:
[15A NCAC 02B.0233 & 0242]
k. Delineation of current FEMA boundaries (floodway, flood fringe & future/0.2%)
l. Delineation of flood prone soil areas
m.
Proposed stormwater easements, access lanes, and backwater easements. Maintenance easement to be
minimum width of 10 feet or greater.
n. RESIDENTIAL ONLY Asterisk lots requiring flood permits
o. Finished floor elevations as required
p. A note should be added to the recorded plat distinguishing areas of disconnected impervious
q.
Location and type of all proposed stormwater management structures (grass swale, wet/dry detention
basin, filtering/infiltration basin, bioretention, etc.). Must be located in a common area of development.
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Wake County Environmental Services Department
Water Quality Division, Watershed Management Section
336 Fayetteville St. • P.O. Box 550 • Raleigh, NC 27602
TEL 919 856-7400 • FAX 919 743-4772
SWCPS – Stormwater Construction Plan Submittal Checklist
3
Checklist.docx
r.
Location of stormwater management structures should meet setback requirements from all wastewater
system components in accordance with Regulations Governing Wastewater Treatment and Dispersal
Systems in Wake County.
s.
RESIDENTIAL ONLY Perpetuity statement
Maximum Impervious Area Square Footage on each Individual Lot will be Stringently Enforced with no
Exceptions into Perpetuity. Plans approved with a maximum impervious surface of (insert) SF per lot.
Standards and Requirements
By marking items with an “X”, applicant acknowledges potential standards to be applied to the proposed development.
Wake County UDO Article 8 – Subdivision Design and Improvements
8.
Article 8-37 Streams or Drainageways - Easements for streams or drainageways must be provided and must
follow the existing course of such streams or drainageways. Easements for drainage of surface waters from 4
lots or less may cross lots only if the Planning Board or Planning Director determines that such location will not
pose a hazard to persons or property.
9.
Article 8-42 Lakes and Dams - If a lake is proposed to be constructed or retained within a subdivision, the lake
and its dam must be constructed or structurally upgraded to accommodate the runoff from a 24-hour, 100-year
frequency storm
.
• Runoff computations must use [SCS] methods or other acceptable engineering standards
• Any lake with a dam that is 25 feet in height or more, or that an impoundment capacity of 50 acre feet
or more must obtain State agency approval in accordance with Article 21, Chapter 143 of the North
Carolina General Statutes.
10.
Article 8-43 Standards - All subdivisions within the zoning districts R-40W, R-80W and overlay districts WSO-
2NC, WSO-3CA, WSO-3NC and WSO-4P must be designed and constructed so that all development directly
associated with the subdivision (e.g., roads, utilities, grading, drainage facilities) and all subsequent
development (e.g., buildings, driveways, yards, on-site utilities, grading, drainage facilities) on the subdivision’s
lots and other parcels:
• minimizes impervious or partially pervious surface coverage;
• diffuses the flow of stormwater runoff, encourages sheet flow and avoids concentrated discharge of
stormwater into surface waters;
• incorporates Best Management Practices (BMPs) to minimize adverse water quality impacts;
• transports stormwater runoff from the development by vegetated conveyances; and
• avoids disturbance of vegetation within water supply watershed buffers
Wake County UDO Article 9 - Stormwater Management Requirements
See Wake County’s Stormwater Manual: Submittal and Design Guidance
11.
Stormwater Review Required - All residential subdivision development must submit a plan to comply with
Article 9. Minor subdivisions have the option of limiting impervious to 15%. Office, institutional, commercial or
industrial development that disturbs greater than ½ acre is required to comply with the stormwater
management regulations of Article 9.
12.
Stormwater Permit – is required for all development and redevelopment unless exempt pursuant to the UDO. A
permit may only be issued subsequent to a properly submitted, reviewed and approved stormwater
management plan and permit application. [Article 9] Note: A permit may not be required if there are no post-
construction requirements (i.e. BMPs).
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Wake County Environmental Services Department
Water Quality Division, Watershed Management Section
336 Fayetteville St. • P.O. Box 550 • Raleigh, NC 27602
TEL 919 856-7400 • FAX 919 743-4772
SWCPS – Stormwater Construction Plan Submittal Checklist
4
Checklist.docx
13.
Volume Management – is required for RESIDENTIAL regular subdivisions when the post development curve
number exceeds the pre development curve number using the Wake County Hybrid Stormwater Tool. Minor
subdivisions have the option of limiting impervious to 15%.
14.
BMPs - For projects requiring stormwater treatment for quality and/or quantity control, the applicant must
comply with the NC BMP Manual, as well as Article 9 Stormwater Management, Part 3 Completion and
Maintenance of Improvements prior to approval of the record plat.
15.
Downstream Impact Analysis – Required analysis using the “10% rule” drainage area evaluation of the 10-year,
24-hour peak flow of the pre/post development to determine if the project will have any impacts on flooding or
channel degradation downstream of the project site in accordance with Article 9-22.
Nutrient Management Strategies – Neuse Rules [15A NCAC 02B.0235]; Neuse Rules apply County-wide [Article 9-21]
See Wake County’s Stormwater Manual: Submittal and Design Guidance
Select all that apply.
16.
Peak Flow – new development shall not result in a net increase in peak flow leaving the site from the pre
development conditions for the 1 yr-24hr storm.
17.
Nitrogen Load- contributed by the proposed new development activity shall not exceed the unit area mass
loading rate for nitrogen of 3.6 of pounds per acre per year: nitrogen loading shall be calculated using the Wake
County Hybrid Stormwater Tool.
a.
Replacement or Expansion w/No Net Increase in BUA – proposed development that would replace or
expand structures or improvements that existed as of July 2001, and that would not result in a net
increase in built-upon area shall not be required to meet nitrogen loading targets except to the extent
that the developer shall provide stormwater control at least equal to the previous development.
b.
Replacement or Expansion with Net Increase in BUA proposed development that would replace or
expand structures or improvements and that would result in a net increase in built-upon area shall
meet the target of 3.6 lbs/ac/yr for the entire site OR achieve a 30% reduction in nitrogen loading and
no increase in phosphorus loading.
c.
LID option - Developments that show volume matching using Storm-EZ shall be considered as meeting
nutrient export requirements without making offset payments provided the following:
• When analyzing a development site, the pre-development land cover shall be entered into
Storm-EZ as “Woods” for the entire project area.
• The Wake Couty Hybrid Tool must be run to estimate the pre-development, and post-
development, pre-BMP nutrient export rates for the site.
See NCDENR Memo on Coordination between LID & NSW Programs
Wake County UDO Article 10 - Erosion and Sedimentation Control Requirements
18.
Erosion Control: This project will require a Land Disturbance Permit if it involves greater than one acre of
disturbance. See website for details. Note: If the land disturbance is part of a common plan of development
that is greater than one acre of disturbance, an Approved Erosion and Sediment Control Plan and Land
Disturbance Permit are required for each individual tract or parcel disturbance within the common plan of
development, regardless of land disturbance acreage in each tract/parcel.
Wake County UDO Article 14 - Flood Hazard Area Requirements
19.
Flood Study Required [Article 14] A study of the potential changes in the base flood elevation caused by the
obstruction (fill), encroachment, alteration or relocation (including driveway or road crossings) of the following
areas (15a-f):
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Wake County Environmental Services Department
Water Quality Division, Watershed Management Section
336 Fayetteville St. • P.O. Box 550 • Raleigh, NC 27602
TEL 919 856-7400 • FAX 919 743-4772
SWCPS – Stormwater Construction Plan Submittal Checklist
5
Checklist.docx
a.
a FEMA mapped floodway
(Note: No new structures may be constructed or placed within a floodway or non-encroachment area
except as otherwise provided by subsection 14-19-2; AND No fill may be placed in a floodway or non-
encroachment area except as otherwise provided by subsection 14-19-2; [Article 14-19-3(A-B)])
b. a non-encroachment area [Article 14-19-3(A-B)], see note above
c. a FEMA mapped area of special flood hazard that has not previously been studied in detail
d.
flood hazard soils areas with a total drainage area of more than 5 ac but no more than 25 ac
[Article 14-15-3] – or -
e.
flood hazard soils areas with a total drainage area of more than 25 ac, but less than 100 ac
[Article 14-15-4] – or -
f. flood hazard soils area with a total drainage area of 100 ac or more [Article 14-15-5]
Wake County UDO Article 11 - Environmental Standard Requirements
20.
Water Supply Watershed Buffers (WSWB) Article 11, Part 2 Select all that apply.
a.
Water Supply Impoundments with a drainage area of 25 acres or more [Article 11-21-2]:
• WSWB required with a minimum width of 100’ around all water supply impoundments
• Buildings must be setback at least 20 feet from the outer boundary of the required buffer area.
b.
Water Supply Impoundments with a drainage area of 5 to 25 Acres [Article 11-21-3]:
• WSWB required with a minimum width of 30’ provided around all water impoundments
• Buildings must be setback at least 20 feet from the outer boundary of the required buffer area.
c.
Non-Water Supply Impoundments with a drainage area of 25 Acres or more [Article 11-21-4]:
• WSWB required with minimum width of 50‘ around all non-water supply impoundments.
• Buildings must be setback at least 20 feet from the outer boundary of the required buffer area.
d.
Perennial Streams [Article 11-21-5]:
• WSWB required with a minimum width of 100’ along each side of a stream shown as a perennial
stream on the most recent edition of U.S.G.S. 1:24,000 (7.5 minute) scale topographic maps.
• The area of the required buffer that begins at the stream bank and extends landward 50 feet is
subject to the Zone 1 standards of Sec. Section 11-22-1(A).
• The area of the required buffer that begins at the outer edge of Zone 1 and extends landward 50
feet is subject to the Zone 2 standards of Sec. Section 11-22-1(B).
• No minimum building setback from the required buffer.
e.
Non-Perennial Watercourses [Article 11-21-6]
• WSWB required with a minimum width of 50’ along each side of non-perennial watercourses,
channels, ditches or similar physiographic features with a drainage area of 25 acres or more
• Buildings must be setback at least 20 feet from the outer boundary of the required buffer area.
f.
Watercourses and Channels, 5 to 25 Acres [Article 11-21-7]
• WSWB required with a minimum width of 30’ along each side of a watercourse, channel, ditch, or
similar physiographic feature with a drainage area of at least 5 acres, but less than 25 acres
• Buildings must be setback at least 20 feet from the outer boundary of the required buffer area.
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Wake County Environmental Services Department
Water Quality Division, Watershed Management Section
336 Fayetteville St. • P.O. Box 550 • Raleigh, NC 27602
TEL 919 856-7400 • FAX 919 743-4772
SWCPS – Stormwater Construction Plan Submittal Checklist
6
Checklist.docx
g.
Activities Allowed within Buffers [Article 11-22-2]: Driveway crossings that access single-family
dwellings, provided:
• no alternative to their location in the buffer (including opportunity for shared driveways) exists;
• buffer disturbance is no more than 60‘ wide;
• buffer disturbance is no more than 6,000 SF;
• the driveway crosses the buffer at an angle close to 90 degrees and not less than 60 degrees;
• side slopes do not exceed a 2:1 (horizontal to vertical) ratio (bridging and/or retaining walls may be
used to meet this and the disturbance width standard); and
• all culverts are designed and constructed for the 25-year storm event
h.
Activities Allowed within Buffers [Article 11-22-2]: Road crossings (public or private roads), provided:
• no alternative location in the buffer exists;
• buffer disturbance does not extend beyond the required right-of-way or easement width, or in no
case is more than 90 feet wide;
• buffer disturbance is no more than 9,000 SF in area
• the road crosses the buffer at an angle close to 90 degrees and not less than 60 degrees;
• side slopes do not exceed a 2:1 horizontal: vertical ratio (bridging and/or retaining walls may be
used to meet this and the disturbance width standard); and
• all culverts are designed and constructed for the 25-year storm
21.
Special Watershed Areas - Swift Creek Water Supply Watershed Development in the Swift Creek Water Supply
Watershed is subject to the requirements of the Swift Creek Land Management Plan in addition to other
applicable standards.
a.
An as-built plan prepared by a licensed professional land surveyor is required for all lots before a
Certificate of Occupancy may be issued. [11-30-3]
b.
In addition to the standards of the underlying zoning district, additional standards apply to all land
within the Swift Creek Water Supply Watershed. (See [11-30-4])
22. Special Watershed Areas - Little River Water Supply Watershed
a.
An as-built plan prepared by a licensed professional land surveyor is required for all lots before a
Certificate of Occupancy may be issued. [11-31-1]
b.
The following maximum impervious surface ratios apply to all nonresidential development in the Little
River Water Supply Watershed:
R-80W = 6% of lot/site
R-40W = 12% of lot/site
23. Special Watershed Areas - Smith Creek Water Supply Watershed
a.
All residential and commercial properties require a preliminary site plan prepared by a licensed
professional land surveyor, landscape architect, architect, or engineer.[11-32-1]
b.
All residential and commercial properties require a preliminary site plan prepared by a licensed
professional land surveyor, landscape architect, architect, or engineer.[11-20-1]
c.
The following maximum impervious surface ratios apply to all nonresidential development in the Smith
Creek Water Supply Watershed:
R-80W = 6% of lot/site
R-40W = 12% of lot/site
WAKE
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WAKE SWCPS Stormwater Construction Plan Submittal Checklist (Town of Rolesville)

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Completed 16 July 2020

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