HomeMy WebLinkAbout20051978 Ver 2_Application_20070124E'nV
Environmental Consulting Services Inc.
3764 Rominger Road
Banner Elk, NC 28604
Ph/Fax: 828-297-6946
e-mail: john@env-ecs.com
January 23, 2007
Mr. John Dorney
NC DENR DWQ
Wetlands/401 Unit
1621 Mail Service Center
Raleigh, NC 27699-1621
PE~~,~~~E:uT
RECEIVED
RE: Shuford -Tate Blvd. PD-MU Development
Hickory, North Carolina
Dear Mr. Domey:
Included under this cover are 6 copies of an application for impacts to an isolated wetland in
Hickory, NC. A check in the amount of $200.00 is included to cover the permit fee. Impacts to
the isolated wetland are 0.284 acres. Other impacts to non-isolated waters on the site are
limited to 0.0937 acres of wetlands and 92 linear feet of stream impact. All stream impacts to
perennial streams (52') are associated with utility line installation and are temporary in nature.
There is 40' of fill impact in a small intermittent stream. If you have any questions regarding
this request please call me at 828-297-6946, thank you.
Sincerely,
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Jo n C. Vilas
President, E'nV Environmental Consulting Services Inc.
Cc: Alan Johnson
Hunt Shuford
Roger Young
Shad Walters
Clay Neil
E'nV file
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Office Use Only: Form Version March OS
USACE Action ID No. DWQ No. V a. 0 5- i q ~ 8
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
I. Processing Pr~YP~~~`NT
Check all of the approval(s) requested for this project: R~CE~~E~
^ Section 404 Permit ^ Riparian or Watershed Buffer Rules
^ Section 10 Permit ® Isolated Wetland Permit from DWQ
^ 401 Water Quality Certification ^ Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested:
NWP 39
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ^
4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII,
and check here: ^
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), chec p _~~ IJ ~`f [~
II. Applicant Information IJ 99..~~
JAN 2 4 2007
Owner/Applicant Information ~~~ _ w~aT>:k c~t}Ni_ET1°
Name: Shuford -Tate Boulevard PD-MU Developms~ sTytir~R awwc~
Mailing Address: PO Box 2228
Hickory, NC 28603
C H 51-u.~.~ ord.
Telephone Number: Fax Number: 828-304-8387
E-mail Address: hshuford(a,shurtape.com
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name: John Vilas
Company Affiliation: E'nV Environmental Consulting Services Inc.
Mailing Address: 3764 Romin~er Road
Banner Elk NC 28604
Telephone Number: 828.297.6946 Fax Number: 828.297.6946
E-mail Address:_ iohn(a~env-ecs.com
III. Project Information e
Page 5 of 14
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of prof ect: Shuford- Tate Boulevard PD-MU Development
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 372205079859, 372205177761, 372209271170,
372205083992
4. Location
County: Catawba Nearest Town: Hickory
Subdivision name :Shuford- Tate Boulevard PD-MU Development
Directions to site (include road numbers/names, landmarks, etc.: From 321 South take a left
Turn right onto Lenoir-Rhyne Blvd SE. From there take a left onto Tate Blvd SE. The site is
approximately 2 miles on your left.
5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimum): 35° 43' 46.7041 °N 81° 17' 7.0440 °W
6. Property size (acres):
7. Name of nearest receiving body of water: Miller Branch (class C~ and three tributaries UT-1,
UT-2, and UT-3
8. River Basin: Catawba River Basin
(Note -this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.enr.state.nc.us/admul/maps/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: The project area and surrounding land is proposed to be zoned
planned development -mixed use (PD-MU) but is currently zoned light industrial (I-2~ by
Page 6 of 14
the City of Hickory, and the adjacent property to the east is already developed and being
as such. The project area has mostly been undeveloped except for two pockets (of three or
four acres each) of rading which occurred approximatel~y_ ergo. Prior to this
disturbance this property was used as a subsistence farm. Miller Branch (index # 11-129-5-1;
class C) is the one named stream as shown on the Hickory, NC USGS topographic
quadrangle. This stream flows north to south through the site. Three unnamed tributaries to
Miller Branch also originate on the property. UT-1 originates east of Miller Branch. These
two streams make confluence in the southwest corner of the property. UT-2 also on ig Hates
on site out of wetland unit W2 on the western portion of the property and makes confluence
with Miller Branch offsite. The Hickory, NC USGS topographic quadrangle shows that a
pond existed on the northern boundary of the property approximately ten ergo, after the
dirt dam was breeched, the pond drained. This old pond basin is currently a .219-acre
wetland s,, s~~Wl) and is the head of Miller Branch. Groundwater seepage and a perched
water table allow W 1 to stay mostly saturated with inundation in lower lying areas. W2 is the
head of an intermittent tributary of Miller Branch and is a riparian wetland approximately
0.022 acres in size. The h dy rology for this system is controlled by direct surface runoff and
emerging ground water. Lame rain events (causing erosion of surroundin areas) have
deposited non-hydric soils (8" deep) on the surface of W2. The last wetland on this site (W3)
is an isolated wetland, 0.315 acres in size. This unit has been affected by offsite disturbances.
W3 has mostly soils with high clay content causing_pooling to occur with large rain events.
This has caused the growth of hydric vegetation. Wetland unit W3 is located in an open field
below a natural cove. The three wetlands collectively total 0.558 acres. The elevation of the
site ranges from 960' above sea level, along the southern boundary of the property, to 1,087'
above sea level on the northern property boundary. The majority of the site has anOak-
Hickory forest community including: Northern Red Oak, White Oak, Chestnut Oak,
Dogwood, Red Maple, etc.
10. Describe the overall project in detail, including the type of equipment to be used: The
75.065-acre Shuford Development includes a public access road (road is proposed at
1,967.66 feet in length and 25' in width) connecting Performance Drive S.E. with McDonald
Parkway and following the northern most property boundary. Once built this road will be
used to access eleven lots that are proposed to be zoned PD-MU. These lots range in size
from approximately three acres to eleven acres. Standard construction equipment (track hoe,
bulldozers, and large trucks) will be used on site to excavate and grade the new road. The
appropriate soil erosion and sediment controls will be used and maintained during
construction.
11. Explain the purpose of the proposed work: The purpose of this project is to build a public
access road that connects Performance Drive S.E. with McDonald Parkway. This road will
then be used to access lots that are to be zoned PD-MU. The impacts to the wetlands are
associated with the construction of the access road and caused by rg ading and fill. The
impacts to Miller Branch will be from accessing and installing utilities.
Page 7 of 14
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. There have been no previous jurisdictional determinations requested or
obtained for this project.
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
The eleven individual lots within the project area will be developed into mixed use facilities.
These facilities will be responsible for their own onsite stormwater detention areas. The lots have
been strate ig, call placed to minimize impacts to the waterways and the majority of lots will have
no impacts. Miller Branch serves as a lot boundary with a 15' setback on both sides of the
stream. UT-1 also serves as a lot boundary with the same setback until it reaches lot 5. Lots 7
and 8 have wetlands within their boundaries and UT-1 flows through the middle of lot 5. This
work has been excluded from the current application because no building_plans have been
submitted at this time.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
1. Provide a written description of the proposed impacts: Proposed rg ading and fill will impact
three wetlands on the property. There will be 0.0715 acres of impact to W 1 (see site map)
and 0.022 acres of impact to W2. These wetland impacts include the use of clean fill material
into the wetlands to raise road grade. Fill material into wetlands will extend only to the width
necessary for road construction. There will be two temporary impacts on Miller Branch
caused by stream crossi~s to install and access utility lines. These two temporary
Page 8 of 14
disturbances will be returned to their natural state after installation is complete. There will
also be four permanent impacts on Miller Branch; rip-rap will be installed after the stream
has been disturbed from the installation of the sewer line crossing to stabilize the banks. This
r~-rap will be range from 8" to 12" and will be placed on top of filter fabric, see drawing 1.
UT-2 will also be impacted by fill from the proposed building and parkin plans of lot 8.
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due to both structure and flooding.
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
(es/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)
1 Fill Forested (W1) No Adjacent .0715
2 Fill Riparian Wetland (W2) No Adjacent .022
3 Grading, Fill Isolated (W3) No 875' 0.284
Total Wetland Impact (acres) .3775
3. List the total acreage (estimated) of all existing wetlands on the property: 0.558 acres
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage, multiply length X width, then divide by 43,560.
Stream Impact
Number
(indicate on ma)
Stream Name
Type of Impact
Perennial or
Intermittent? Average
Stream Width
Before Im act Impact
Length
(linear feet) Area of
Impact
(acres)
1 (offsite) Miller Branch Rip-rap Perennial 8' 8' .001
2 (offsite) Miller Branch Rip-rap Perennial 8' 8' .001
3 (offsite) Miller Branch Temp. Crossing # 1 Perennial 8' 10' .002
4 (offsite) Miller Branch Temp. Crossing #2 Perennial 8' 10' .002
5 UT-2 Fill Intermittent 3' 40' .003
6 (offsite) Miller Branch Rip-rap Perennial 8' 8' .001
7 Miller Branch Rip-rap Perennial 3' 8' .001
Total Stream Impact (by length and acreage) 92' .011
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
exca
etc.
~Onen Water Impact ~ Name of Waterbodv ~ Type of Impact ~ Type of Waterbodv ~ Area of ~
Page 9 of 14
Site Number
(indicate on ma) (if applicable) (lake, pond, estuary, sound, bay,
ocean, etc.) Impact
(acres)
Total Open Water Impact (acres) 0
6. List the cumulative impact to all Waters of the U.S. resulting from the protect:
Stream Impact (acres): 0.011
Wetland Impact (acres): 0.3775
Open Water Impact (acres): 0.000
Total Impact to Waters of the U.S. (acres) 0.3885
Total Stream Impact (linear feet): 92'
7. Isolated Waters
Do any isolated waters exist on the property? ®Yes ^ No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only
applies to waters that have specifically been determined to be isolated by the USACE:
_ The proposed impact to the isolated wetland will be caused by rg_ ailing and fill for road
construction. The construction will impact 0.284 acres of the isolated wetland. Wetland
vegetation exists. There are significant disturbances around this wetland from the adjacent
property. This wetland is an old sediment basin created from previous construction on the
adjacentproperty, and in heavy rain events still functions as such, but has become a
naturalized wetland. There is an existing_pipe located under the wetland; it was installed
~~roximately 30 emirs ago. The pipe has leakYjoints or has otherwise failed in several areas
resulting in sinkholes which are approximately 20'-30' deep and clearly visible in the open
field. These holes and the potential for more to open represent a significant danger that must
be addressed as soon as possible. The contractor is aware of this situation and has plans to
repair the wipe back to its original working condition. When the pipe is fixed it is likely that
the hydrology will be removed from the wetland, and these repairs would cause substantial
disturbance to the wetland. This wetland is not only isolated but incidental. It was created
because of a failed structure (pipe) that must be repaired to address a potentially dan Brous
situation.
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ^ uplands ^ stream ^ wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Current land use in the vicinity of the pond:
Page 10 of 14
Size of watershed draining to pond: Expected pond surface area:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts. Impacts within this property are
associated with the construction of the public access road and installation of the sewer and utility
lines. The lot lines were drawn along the stream corridors to minimize impacts. The best site for
the road was determined based on the nature of the topography the property boundary, and the
existing roads around the site. The proposed road will tie into an existing, intersection on
McDonald Parkway, this needed to be as far from the Tate intersection as possible to minimize
traffic congestion. Therefore, the proposed road comes out on McDonald Parkway at the
northern most boundary of the property. The impacts to W 1 were unavoidable due to this
concern. The road will follow a rid eg that spans the len h of the property allowing for minimal
impacts to streams and maximum land use. The tie in on Performance drive also needed to be
maximum distance from Tate Blvd. and close to the fiberline site boundary. See Avoidance and
Minimization Map for visual representation of boundary lines.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
Page 11 of 14
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.nc.us/ncwetlands/strmgide.html.
1. Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
No mitigation is proposed at this time.
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at
(919) 715-0476 to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this form. For
additional information regarding the application process for the NCEEP, check the NCEEP
website at htt~://h2o.encstate.nc.us/wrp/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet): 0
Amount of buffer mitigation requested (square feet): 0
Amount of Riparian wetland mitigation requested (acres): 0
Amount ofNon-riparian wetland mitigation requested (acres): 0
Amount of Coastal wetland mitigation requested (acres): 0
IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ® No ^
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at (919) 733-5083 to review current thresholds for environmental documentation.
Yes ^ No
3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ^ No ^
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
Page 12 of 14
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify )? Yes ^ No
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multi Tiers.
* Impact Required
Zone ,_______ r ~~ Multiplier ,~,~;+;~~~;~~
3 (2 for Catawba)
1.5
Total
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additiona120 feet from the edge of Zone 1.
3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attach all appropriate information as identified
within 15A NCAC 2B .0242 or .0244, or .0260.
XI. Stormwater (required by DWQ)
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss stormwater
controls proposed in order to protect surface waters and wetlands downstream from the property. If
percent impervious surface exceeds 20%, please provide calculations demonstrating total proposed
impervious level. There are currentlX no impervious surfaces in the project area. See the attached
stormwater mana e~ mentplan for calculations and details of the proposed BMP's. In the Stormwater plan
each lot is listed separately to give the acreage of impervious surface within each lot boundary.
Stormwater will be treated from two offsite locations NE of the property on adiacent lots. This
stormwater from this site and two offsite locations will be treated with four Stormwater wetlands (with
85% removal of TSS) and two drX detention basins. These BMP's will meet the specifications as laid out
in the "Stormwater Best Management Practices" compiled by DWQ and DENR (1999). These
specifications are shown on the stormwater wetland typical design and the profile of the constructed
wetland and dry detention basin. The total impervious post-development is 40.61%, with 30.7 acres of
impervious development~roposed The proposed SWM flan calls for a total of 34.03 impervious acres to
be treated with best mana event practices in order to meet the state requirements.
XII. Sewage Disposal (required by DWQ)
Page 13 of 14
' v. V V G ' L
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated &ona the proposed project, or available capacity of the subject facility.
This~roiect area will have its sewer lines tied in with the city of H' ko w ste~vater trey cut
lent.
XIIL Violations (required by AWQ)
Is this site in violation of DWQ VJctland Rules (l~A NCAC 2I~ .0500) ar any Buffer Rules?
Yes ^ No
Is this an aftez-the-fact permit application? Yes (~ No ^
• Some impact has occurred im the isolated wetland_
X>[V. Cumul$tive Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes ^ Na
If yes, please submit a qualitative or quantitative currtulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http•/~'h~o.enr.state.nc.us!n~~vetlands. Yf no, please provide a short narrative description: After
the dev Iovment of this multi-use area these aze no plans for future development. _ __
XV. Utlter Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
coAStzuetion dates to allow processing time for these permits. However, azt applicant may
choose to fist constraints associated with constructYOn or sequencing that may impose limits on
work schedules (e.~_, draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility, problems„ or other issues outside of the applicant's control).
The auvlicant eau~sts oermissior< to vroceed immediately with repairs to exisrins failed pine
system t 's work will require some impacts to•the isolated wetland. This work is requested to
prevent additi nal sink holes from opening up. Such an occurrence could not only result
excessive sedimentation entcrine Haller Branch but. in the worst case. could resui in damage to
Tate lvd. ten 'all crew ' lie safe oncern.
:.~.~
pli t/Agent's Signature D to
(Agent's si c is valid only if an authorization letter from the applicant is provided.)
t •d
s~ss~szeae
Page 14 of I4
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Shuford Development
Catawba County, North Carolina
Topographic Map
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Not Scaled Hickory, NC USGS Topographic Quadrangle
Shuford Development
Catawba County, North Carolina
Soils Map
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Not Scaled
CnE3: Cecil clay loam, 10-25%
CmD2: Cecil sandy loam, 10-25%
HsB2: Hiwassee loam, 2-6%
HwB2: Hiwassee clay loam, 2-6%
HwC2: Hiwassee clay loam, 6-10%
PeE: Pacolet soils, 10-25%
Nortn
Tate Blvd. PD-MU
Shuford Development
Catawba County, North Carolina
Site Plan
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W1: Forested Wetland (0.219 acres)
W2: Riparian Wetland (0.022 acres)
W3: Isolated Wetland (0.315 acres)
UT-1: Unnamed Intermittent Tributary
UT-2: Unnamed Intermittent Tributary
UT-3: Unnamed Intermittent Tributary
Miller Branch: Perennial Stream
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Shuford Development
Catawba County, North Carolina
Impact Minimization and Avoidance
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Catawba County, North Carolina
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Catawba County, North Carolina
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Typical Detail of Riprap Slope Stabilization
Impacts to Miller Branch
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Riprap will impact approximately 25 linear feet of stream
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Riprap will be placed on top of filter fabric
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Tate Boulevard PD-MU
Stormwater Management Plan
Shuford Development
Hickory, North Carolina
Stormwater Management Plan:
Pre-development (50%TSS removal) there were no existing impervious surfaces on site.
Based on the proposed development plans the following table shows the calculations for
impervious surfaces and TSS removal for each lot within the property boundary as well
as the two sites to be treated outside of the property boundary. This requirement will be
met through the installation of four stormwater wetlands (85%TSS removal) and two dry
detention basins (50%TSS removal). The developed site will have a total impervious
cover of 40.6% or 30.73 acres. The proposed stormwater management plan meets the
state requirements by treating a total of 34.03 acres of impervious cover (29.6 acres on-
site and 4.43 acres off-site). The off-site impervious acres are located on industrial sites
adjacent to and northeast of the project site. The 85% removal requirement will be met by
treating 26.21 impervious acres with four constructed stormwater wetland basins (85%
removal efficiency) and treating the remaining 7.82 acres with two extended dry
detention basins (50% removal efficiency).
Shuford Industrial Site Stormwater Management Plan
Spreedsheet Showing Compliance with 85% TSS Removal Requirement
Removal Units TSS
Location Area Imperv (ac) Imperv % BMP Type Efficiency Removed
lot 1 4.05 2.04 50.37 wetland 0.85 1.734
lot 2 4.04 2.039 50.47 wetland 0.85 1.73315
lot 3 4.77 2.7 56.60 wetland 0.85 2.295
lot 4 4.58 2.57 56.11 wetland 0.85 2.1845
lot 5 10.88 2.9 26.65 wetland 0.85 2.465
lot 6 10.87 4.47 41.12 dry basin 0.5 2.235
lot 7 2.9 1.33 45.86 wetland 0.85 1.1305
lot 8 7.55 3.35 44.37 dry basin 0.5 1.675
lot 9 1.55 0 0.00 none 0 0
lot 10 7.44 3.08 41.40 wetland 0.85 2.618
lot 11 9.95 5.12 51.46 wetland 0.85 4.352
Road 2.3 1.129 49.09 0.95965 0 0
open 4.77 0 0.00 0 0 0
total site 75.65 30.728 40.62 0
0
off lot 1 5 2 wetland 0.85 1.7
off lot 2 8.01 2.43 wetland 0.85 2.0655
Removal Requirement: 30.728 impervious acres * 85%TSS removal = 26.12 units
Removal Efficiency Proposed: 26.21 impervious acres * 85% = 22.28 units
7.82 impervious acres * 50% = 3.91 units
Total Removal = 26.19 units
Wetland Detention Basin Specifications:
The calculations for each basin are provided in the below tables. The wetlands are all
based on the specified guidelines presented in the "Stormwater Best Management
Practices" manual compiled by NCDENR Division of Water Quality (1999). The basin is
designed to have a 3:1 length to width ratio as well as a 3:1 side slope ratio. See the
Stormwater Wetland Profile for details. The pools will be cleaned of sediment when the
sediments have reached 25% of permanent pool depth. This will be specified more in the
O&M Plan. The temporary water quality pool has been sized to release the runoff from a
1"precipitation event. According to the calculations the temporary pool will be able to
draw down in 2-5 days. Access and an emergency drain have been provided for upkeep
and maintenance of the stormwater wetland. See DWQ's Wet Detention Basin Worksheet
for checklist of required items.
Stormwater Wetland 1: Lots 10,11, portion of off-site1, and portion of off-site 2
drainage area to wetland (on-site)
(off-site)
impervious area (on-site)
(off-site)
impervious
use permanent pool depth = 3 feet
SA/DA percent = 1.73
surface area of permanent pool:
17.39 ac
6.6 ac
8.2 ac.
1.45 ac
40%
0173 = SA/23.96 = 0.42 acres
Required Temporary Storage Volume
Rv = 0.05+.009 (40) = 0.41 in/in
volume = 1" * 0.41 * 24 acres/12 = 0.82 ac-ft = 35720 cu-ft
add 20% additional volume for sediment storage = 42,863 cu-ft
Design Specifications:
Forebay
Zone 1 (0"-9" Water Depth)
Zone 2 (9"-18" Water Depth)
Zone 3 (0"-18" Above Water)
Zone 4 (18"-36" Above Water)
Total
18% 3600 sq-ft
35% 7000 sq-ft
35% 7000 sq-ft
10% 2000 Sq-ft
2% 400 Sq-ft
100% 20000 sq-ft
Dimensions of Permanent Pool: 80' by 250'
Below are the calculations for the orifice sizing for Stormwater Wetland 1:
Compute release rate for temporary storage volume over 2 to 5 days and orifice size
WQ volume = 0.82 ac-ft
Q2 = 0.82"`43560/48''3600 = 0.21 cfs
Q5 = 0.82*43560/120*3600 = .083 cfs
Average head = 1.0 ft.
Orifice Eq. Q = CA(2gh)^0.5
for Q2:.21 = .6"A ((2 (32.2)(1))"0.5
A = .036 Sq-ft
dia. = 2.6"
for Q5:.083 = .6"A ((2 (32.2)(1))^0.5
A = .014 Sq-ft
dia. = 1.6"
use 2" pipe with negative slope and trash guard
Stormwater Wetland 2: Lots 1,2,3,4, portion of off-site 1, and portion of
off-site 2
drainage area to wetland (on-site)
(off-site)
total
impervious area (on-site)
(off-site)
total
impervious
use permanent pool depth = 3 feet
SA/DA percent = 2.13
surface area of permanent pool:
17.44 ac.
6.41 ac.
23.85 ac.
9.35 ac.
2.98 ac.
12.33 ac.
52%
2.13%
0213 = SA/23.85 = 0.51 acres
Required Temporary Storage Volume
Rv = 0.05+.009 (52) = 0.52 in/in
volume = 1" * 0.52 * 24 acres/12 = 1.04 ac-ft = 45302 cu-ft
add 20% additional volume for sediment storage = 54,363 cu-ft
Design Specifications:
Forebay 18% 4320 sq-ft
Zone 1 (0"-9" Water Depth) 35% 8400 sq-ft
Zone 2 (9"-18" Water Depth) 35% 8400 sq-ft
Zone 3 (0"-18" Above Water) 10% 2400 sq-ft
Zone 4 (18"-36" Above Water) 2% 480 sq-ft
Total 100% 24000 sq-ft
Dimensions of Permanent Pool: 80' by 300'
Below are the calculations for the orifice sizing for Stormwater Wetland 2:
Compute release rate for temporary storage volume over 2 to 5 days and orifice size
WQ volume = 1.04 ac-ft
Q2 = 1.04*43560/48*3600 = 0.262 cfs
Q5 = 1.04"43560/120"3600 = .105 cfs
Average head = 1.2 ft.
Orifice Eq. Q = CA(2gh)^0.5
for Q2:.262 = .6*A ((2 (32.2)(1.2))^0.5
A = .05 Sq-ft
dia. = 3"
for Q5:.105 = .6'A ((2 (32.2)(1.2))^0.5
A = .02 Sq-ft
dia. = 1.9"
use 2.5" pipe with negative slope and trash guard
Stormwater Wetland 3: Lot 5
drainage area to wetland (on-site) 5.49 ac.
(off-site) 0 ac.
total 5.49 ac.
impervious area (on-site) 2.9 ac.
(off-site) 0 ac.
total 2.9 ac.
impervious % 53%
use permanent pool depth = 3 feet
SA/DA percent = 2.47 2.47%
surface area of permanent pool: .0247 = SA/5.49 = 0.136 acres
Required Temporary Storage Volume
Rv = 0.05+.009 (53) = 0.53 in/in
volume = 1" " 0.53 " 5.49 acres/12 = 0.243 ac-ft = 10,562 cu-ft
add 20% additional volume for sediment storage = 12,675 cu-ft
Design Specifications:
Forebay
Zone 1 (0"-9" Water Depth)
Zone 2 (9"-18" Water Depth)
Zone 3 (0"-18" Above Water)
Zone 4 (18"-36" Above Water)
Total
Dimensions of Permanent Pool: 40' by 150'
18% 1080 sq-ft
35% 2100 sq-ft
35% 2100 sq-ft
10% 600 sq-ft
2% 120 Sq-ft
100% 6000 sq-ft
Below are the calculations for the orifice sizing for Stormwater Wetland 3:
Compute release rate for temporary storage volume over 2 to 5 days and orifice size
WQ volume = 0.243 ac-ft
Q2 = 0.243''43560/48*3600 = 0.06 cfs
Q5 = 0.243*43560/120*3600 = .025 cfs
Average head = 0.85 ft.
Orifice Eq. Q = CA(2gh)^0.5
for Q2:.06 = .6*A ((2 (32.2)(.85))^0.5
A = .014 Sq-ft
dia. = 1.6"
for Q5:.004 = .6*A ((2 (32.2)(.85))"0.5
A = .006 Sq-ft
dia. = 1"
use 1.5" pipe with negative slope and trash guard
Stormwater Wetland 4: Lot 7
drainage area to wetland (on-site)
(off-site)
total
impervious area (on-site)
(off-site)
total
impervious
use permanent pool depth = 3 feet
SA/DA percent =1.46
surface area of permanent pool:
4.08 ac.
0 ac.
4.08 ac.
1.33 ac.
0 ac.
1.33 ac.
33%
1.46%
0146 = SA/4.08 = 0.06 acres
Required Temporary Storage Volume
Rv = 0.05+.009 (33) = 0.35 in/in
volume = 1" " 0.35 * 4.08 acres/12 = 0.12 ac-ft = 5200.0 cu-ft
add 20% additional volume for sediment storage = 6220 cu-ft
Design Specifications:
Forebay 18% 504 sq-ft
Zone 1 (0"-9" Water Depth) 35% 980 sq-ft
Zone 2 (9"-18" Water Depth) 35% 980 sq-ft
Zone 3 (0"-18" Above Water) 10% 280 sq-ft
Zone 4 (18"-36" Above Water) 2% 56 sq-ft
Total 100% 2800. sq-ft
Dimensions of Permanent Pool:28' by 100'
Below are the calculations for the orifice sizing for Stormwater Wetland 4:
Compute release rate for temporary storage volume over 2 to 5 days and orifice size
WQ volume = 0..012 ac-ft
Q2 = 0.12*43560/48''3600 = 0.03 cfs
Q5 = 0.12*43560/120"3600 = .012 cfs
Average head = 0.85 ft.
Orifice Eq. Q = CA(2gh)^0.5
for Q2:.03 = .6*A ((2 (32.2)(.85))^0.5
A = .007 Sq-ft
dia. = 1.1"
for Q5:.012 = .6*A ((2 (32.2)(.85))^0.5
A = .003 Sq-ft
dia. = 0.7"
use 1.0" pipe with negative slope and trash guard
Profile of Constructed Wetland
Riser Prevents Overflowing
Embankment with Marsh Plants Embankment Top of Compacted
and Spillway Earthen Embankment
To be covered in filter cloth Emergency
First 1" Storm Storage And riprap for stabilization
• ~illway
------------------------------- ---- - ---- -------------------------------------------------------------------------------------- -- -----------
Permanent Pool
Inflow
Riprap Backed
With Filter Cloth 5 /0 0 -9 Marsh Zone - 25%--
Littoral Shelf
9"-18" Marsh Zone 10' Wide
Forebay Marsh Zone Drain
3' Deep W/ Valve Stable Outfall
Pool Reverse Pipe Riprap and
3' Deep W/ Trash Guard Filter Cloth
Anti-Seep Collar
Not Scaled
Basic Plan of Stormwater Wetland
With Access Road for Maintenance
Not Scaled
Stormwater Wetland Planting Design
See Table For Specific Plant List
Forebay
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Embankment with
Marsh Plants
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Pools 3' Deep
Stormwater Wetland Typical Design
~ Length to Width Ratio: 3:1
~~/o~t High Marsh Zone 10' Wide 6:1 Slope Littoral Shelf
Side Slope Ratio: 3:1
Forebay
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Earthen Berm
Max Storm Water Level
Not Scaled
Stormwater Wetland Specific Plant List*
Marsh 9"-18" &
Littoral Shelf
Juncusspp.
Carex spp.
Echinochola spp.
Leersia spp.
Scirpus spp.
Sparganium spp.
Panicum spp.
Setaria spp.
Rushes
Sedges
Wild Millet
Rice Cutgrass
Bulrushes
Burreeds
Panic Grass
Bristle Grass
Marsh 0"-9" &
Embankment
Upland:
Scirpus pungens
Hibiscus mos.
Leersia spp.
Carex spp.
Scirpus spp.
Polygonnum spp.
Juncus spp.
Acorus cal.
Acer rubrum
Faxinus perm.
Betula nigra
Itea virgin.
Saururus cern.
Impatiens cap.
Onoclea sens.
Arundinaria gig.
Common Three-Square
Marsh Hibiscus
Rice Cutgrass
Sedges
Soft-Stem Bulrush
Smartweed
Soft Rush
Sweet Flag
Red Maple
Green Ash
River Birch
Virginia Willow
Lizard's Tail
Jewelweed
Sensitive Fern
Giant Cane
* Out of the above list there will be at least four of the species planted per zone.
Alternative species may be used if approved in advance by the engineer.
Dry Basin Specifications:
The calculations for the two proposed dry basins are below. The design specifications
used for these basins are as made available in the "Stormwater Best Management
Practices" manual compiled by NCDENR Division of Water Quality (1999). The basin
length to width ratio is 3:1 as well as a side slope ratio of 3:1. Inlet and outlet erosion
control measures are designed by using riprap and filter cloth. Grasses that are tolerant of
frequent inundation will be planted on the slopes and within the basin. The orifice has
been calculated to control the release of stormwater to the jurisdictional streams. See
DWQ's Extended Dry Detention Basin Worksheet for a checklist of the required
information.
Extended Dry Detention Basin 1: Lot 6
drainage area to wetland (on-site) 7.85 ac.
impervious area (on-site) 4.47 ac.
impervious % 57%
Required Temporary Storage Volume
Rv = 0.05+.009 (57) = 0.563 in/in
volume = 1" * 0.563 * 7.85 acres/12 = 0.37 ac-ft = 16,043 cu-ft
add 20% additional volume for sediment storage = 19,252 cu-ft
Dry Basin Dimensions: 40' by 140' (3.5 ft deep)
Below are the calculations for the orifice sizing:
Compute release rate for temporary storage volume over 2 to 5 days and orifice size
WQ volume = 0.37 ac-ft
Q2 = 0.37"43560/48"3600 = 0.093 cfs
Q5 = 0.37"43560/120"3600 = .04 cfs
Average head = 1.5 ft.
Orifice Eq. Q = CA(2gh)^0.5
for Q2:.093 = .6'`A ((2 (32.2)(1.5))^0.5
A = .016 Sq-ft
dia. = 1.7"
for Q5:.04 = .6*A ((2 (32.2)(1.5))^0.5
A = .007 Sq-ft
dia. = 1.1"
use 1.5" pipe with negative slope and trash guard
Extended Dry Detention Basin 2: Lot 8
drainage area to wetland (on-site) 6.2 ac.
impervious area (on-site) 3.35 ac.
impervious % 54%
Required Temporary Storage Volume
Rv = 0.05+.009 (54) = 0.54 in/in
volume = 1" * 0.54 * 6.2 acres/12 = 0.28 ac-ft = 12,200 cu-ft
add 20% additional volume for sediment storage = 14,600 cu-ft
Dry Basin Dimensions: 40' by 120' (3.5 ft deep)
Below are the calculations for the orifice sizing.
Compute release rate for temporary storage volume over 2 to 5 days and orifice size
WQ volume = 0.28 ac-ft
Q2 = 0.28"43560/48'`3600 = 0.071 cfs
Q5 = 0.28*43560/120'`3600 = .03 cfs
Average head = 1.25 ft.
Orifice Eq. Q = CA(2gh)^0.5
for Q2:.071 = .6"A ((2 (32.2)(1.25))^0.5
A = .013 Sq-ft
dia. = 1.6"
for Q5:.03 = .6"A ((2 (32.2)(1.25))^0.5
A = .006 Sq-ft
dia. = 1.0"
use 1.5" pipe with negative slope and trash guard
Not Scaled
Inflow
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Embankment and Spillway
with Riprap and Filter Cloth
for Stabilization
Dry Detention Basin
Typical Plan and Profile
Length to Width Ratio: 3:1
Side Slope Ratio: 3:1
The basin and slopes will be planted
with grasses that can withstand
frequent inundation.
Grasses:
Wiregrass
American Cupscale
Barnyard Grass
Grass (creeping)
Other species of grasses may be used if
Approved in advance by the engineer.
Compacted Earthen
Embankment
With Riprap and Filter Cloth
for Stabilization
Y~-°
Outlet Orifice
Stormwater Detention Level
Inflow
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Riprap and Filter Cloth ,YYY ~~
Inlet Protection ~ Anti-seep Collar
Forebay
Stable Outlet with
Riprap and Filter
DWQ Project No.
DIVISION OF WATER QUALITY -401 EXTENDED DETENTION (and POCKET*j WETLAND WORKSHEET
I. PROJECT INFORitgATION (please a the following
Project Name • Sh~~ti~c~ five laoy-~~-4` - ~ [~
Contact Person: T k~ V. t4 S - -Phone Number. j~Z81 oZ9 ~--b sy 6
For projects with multiple trasins, speafy which trasin this worksheet applies fo: S 1+J We~fda.~d 13as ~^ # /
Permanent Pool Elevation 3 ft. ~'~"
Temporary Pool Elevation S ft ~~
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
Permanent Pool Surface Area aC~~ U ~ d sq. ft.
Drainage Area a 3.99 ac.
Impervious Area ~i . (oS ac.
Forebay Surface Area 3 re O o s`q.Tt.'
Marsh 0"-9' Surface Arm ~-o c~ C~ sq. 1t:
Marsh 9' 18' Surface Area ~ d C9 O sq. R`
Micxo Pool Surface Area -- -- ~'-/ U O sq. ft.
Temporary Pool Volume 35 ~ }Z V cu. ft.
SAIDA used . D 1 }3
Diameter of Orifice ~•" in.
II. REQUIRED REMS CHECKf~~
(water surface area at permanent pool elevation)
(an-site andoff-site drainage 1o the basin)
(on~ite andoff-site drainage to the basin)
(at permanent pool elevation approximately 15%)'
(at Permanent Pod devatiion approuam-ate~r 35%)•
(af perriiaitetit jSoal-~i~oft'~y 35%)'
(at permanent pod elevation approximately 15°k)'
(volume detained on top of the permanent pool)
(surface area to drainage area ratio)'
(draw down orifice diameter)
Initial in the space provided to indicate the fdlovuing design requirements have been met and supporting documentation is attached. _ If_a
requir,3ment has not been met, attach an explanation of why. At a minimum, a complete stomrwater management plan sutxnittal indndes
a worksheet thr each BMP, design calc•,ulatrons, plans and speafications showing all BMPs and outlet shudure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An int~mptete submittal package will result in a request for
additional information and will substantlally delay final review and approval of the project
The terrrpordry pod controls runoff from the 1 arcf- rain.
The basin side slopes are rro st3seperthan 3:1.
A planting plan for ftre marsh areas with plant species and densities is provided.
Vegetation above the pernranerrtpod devatron-+s died.
An enrergerrc~r drain is provided to drain the basin.
The temporary pod draws down in 2 m 5 days.
Sedrrrent storage is provided n the petmarrerrt pod.
A sed'.rrerrt disposal area is provided.
Access is provided for mair>~ance.
A site spea6c, signed and rrotarimed operation and mairierrarrce agreerrrertt is provided.
The drainage arena (9 any oifstie area) is dePareated on a site plan.
Amens is provided for rtnairdenarrce_
Phan detail for the wetland are provided.
Plan detais for the irdet and annilet are provided.
i' -' A site spea6c aperationn and mairdenarroe agr+eerrnent, sicpned and rnotatmed by the responsible patty s provided (see
ht~JAr2o.ehnrshaterrc. .doc)_
'Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS -See pp.19and 20 of the NC DENR
Stormwater BMP Manual, April 1999.10°Ao open water, 50% high marsh, 40% low marsh.
~~ Elev~~ ass ~~sr~ o+~ S~-f C~~tises ire self ea( pn bps «r oaf (`~~,ef
DWQ Project No.
DNISION OF WATER QUALITY -401 EXTENDED DETENTION (and POCKET') WETLAND WORKSHEET
I. PROJECT INFORMATION (please complete the
ProjedName: ~hu-}v~J l~~ef~.~-+,Q.~-r' Tc~+e ts~va Feu- m~-t
Contact Person: ? ~~. V• (4 s Phone Number: j~Zg) dZ9 }-b g4 6
For projects with multiple basins, spedfy which basin this worksheet applies to: ~ W WeflaRrl Qar.~ # Z
Permanent Pooi Elevation
Temporary Pod Elevation
Pemnanent Pod Surface Area
Drainage Area
Impervious Area
Forebay Surface Area
Marsh 0°-9" Swfaoe Area
Marsh 9° 18' Surface Area
Mirxo Pod Surface Area •- _.
Temporary Pooi Volume
SAIDA used
Diameter of Orifice
REQUIRED ITEMS CHECKI~~T
.3 ft. ~ * (elevation of the orifice invert out)
~S ft ~~ (elevation of the outlet structure invert in)
z ti, ~ o o sq. rt.
~.3. SS ac.
~ a. 33 ac.
4r ~ ~ t7 s`q: ft.'
8 `~O O sq. tt
g4D0 sq.ft;`
8 0 sq. ft
(water surface area at permanent pool elevation)
(on-site and off-site drainage to the basin)
(on~ite and cif-stie drainage bo the basin)
(at permanent pool elevation approximately 15%)•
(at pemraneM pod elevation apprwdmately 35%),
(at permarrerit pooiY~ appro~rnatelY 35%)•
(~ P P~ elevation approximateht 1596)•
~f 5 , 3 0 oZ cu. ft. (volume detained on top of the permanent pool)
• D a t 3 (surface area to drainage area ratio)`
a • S in. (draw down orifice diameter)
Initial in the space provided to indicate the fdlowing design requirements have been met and supporting documentation is attached.- If_a
requirement has not beer- met, attach an explanation of why. At a minimum, a complete stormwater management plan submiittal includes
a worksheet for each BMP, design c~culations, plans and speafications showing all BMPs and outlet stnu~ure details, a detailed
drainage plan and a fur executed operation and maintenance agreerent. An incomplete submittal package will result in a request for
additional information and will substantialty delay final review and approval of the project
;f he Temporary pod conhols nndl' ifi~om the 1 Bch rain.
The basin side skrpes are no steeper ihan 3:1.
A plantung plan for the marsh art'as vdih plant speaes and densities is provided.
Vegetation above the permanent pod elevatiorris aped' red.
An errtergerrc~t drain is provided b drain the basin.
The temporary pod draws dawn in 2 ba 5 days.
~ Sedinent storage is provided it Bre perrrrarrerrt pod.
A sediment disposal area is provided.
Access is provided for mainterranoe.
A shoe speaGc, sired and notar~ed operation acrd mairtenarroe agreement is provided
i!' The drainage area fmrdrrdn9 any oftsr~e area) is detirreabed on a srte plan.
mil'' Access is provided for mairdenance_
!/~ Ptar detais fnr the wetland are provided.
G' Plan detais for the ~ and outlet are provided.
A shoe speatic operation and mairNenarroe agreement, signed and rrotariaed bit the resporrs~rle ~ ~ P (~
http:llh2o.ehnrstatenc. .doc).
'Pocket Wetlands have different design parameters and are only assumed to remove 35°~ TSS -See pp.19and 20 of the NC DENR
Stormwater BMP Manual, April 1999.10% open water, 50% high marsh, QO°~ low marsh.
~-~(- EIevN--~ o.~s ~ks.ect ~.n s~,~~' rJ. K~.~.ts ~ns~.\ttcA `n. 13..~s:~s ~ J~•~S~r
DWQ Project No.
DIVISION OF WATER QUALITY -401 EXTENDED DETENTION (and POCKET`) WETLAND WORKSHEET
l'Rf~CT INFORIAATION (please complete the idbwing
Project Name: Sties-~~~! I~vPt~on.Q.~+-T~~~ Kind PD-wi~-t
Contact Person: T k.. V.!4 s Phone umber: Z8 oZ9 -~ ~U 6
For projects with mu~ple basins, specify whidr basin ibis worksheet aE-plies to: S W W 1o~nc1 l~a.s ~ 3
Permanent Pool Elevation 3 ft ~~
Temporary Pool Elevation S ft ~ ~
(elevation of the orifice invert out)
(elevation of the outl~ structure invert in)
Permanent Pool Surface Area ~ OCR d sq. ft.
Drainage Area S• y 9 ac.
Impervious Area a .9 ac.
Forebay surface Area j o g o s'q.-ft.-
Marsh 0"-9' Surface Area 2 l U b sy. ft;
Marsh 9'-18' Surfaoe Area ~ 1 O O sq. ft.. ~--
Micro Pod Surface Area .... ~f DD sq. ft.
Temporary Pool Volume IUY, 5 (a L cu. ft.
SAlDA used • U ~ `l ~-
Diameter of Orifice / • S in.
11. REQUIRED ITEMS CHECK~I~T
(water surface area at permanent pool elevation)
(on-site and ofd site drainage to the basin)
(on~ite and off-site drainage to the basin)
(at pemnanent pod elevation ~proximatehl 15%)'
(~ P Pool elevation approxunafely 35%)•
(a[ perrirarlerit poal~iatlo(ii appfoxairabely 35%)•
(at permanent pod elevation approximately 15°k)`
(volume detained on top of the permanent pool)
(surface area to drainage area ratio)`
(draw down orifice diameter)
Initial in the space provided to indicde the foAowing design requirements have been met and supporting documentation is aftached._ lf_a
requirement has not been met, attach an exp/anafiorr of why. At a minimum, a complete stomrwater management plan submittal fnk~udes
a worksheet for each BMP, design calculatiars, plans and speafirations showing all BMPs and outlet structure details, a detailed
drainage plan and a fulty executed operation and maintenance agreement. An incomplete submftal package will result in a request for
additional information and will sut~stantidy delay final review and approval of the project
The iarrrporary pool controls runoff from the 1 arch rain.
;the basin side skrpes are ra sieeperitrran 3:1.
A planting plan for the marsh arms widr plats speaes and derrstiies s provided.
Vegetation above the perrrraneM pool elevaiion.isspec~ied.
r errrergerrq-gain isprovided bdrain ihebasin.
to tr'anporary pod draws down in 2 b 5 days.
airrrerrt sbrage is provided in the perrrrainent pod.
sed'ment disposal area is provided.
Loess is provided far nrain6enarroe.
site sped signed and nofarimed operation and rnairierranoe agreement is provided.
~ ~~ area f9 ~- o~sle area) is an a sit3e plan.
Loess is provided for rrrairdenarrce.
Ian detail far the wetland are provided.
Ian detels for the e-{et and collet are provided.
_ ~7.."„'A she speaGc operat9ion and mairderrarroe agreenre<rt, signed arrd notaria®d by the respotrs~e party is txavided (see
http:lltr2oehrrstame.rrc. .doc).
` Podket Wetlands have different design piers and are only assumed to remove 3596 TSS - See pp.19and 20 of the NC DENR
Stormwater BMP Manuel, April 1999.10% open water, 50% high marsh, 40% low marsh.
~~ [levak~ctn, ~o.5ec~ ~A 5~°~-3'~~.~k~~ ivks~[fr~e( F~ bas;~ a-~ i`~SeJ"',
DWQ Project No.
DIVISION OF WATER QUALITY •401 EXTENDED DETENTION (and POCKET) WETLAND WORKSHEET
I. PROJECT INFORMATION (please complete the folowing infiormation}:
Project Name : Shc~-4'vr~ ~~p (~oy,,~,~-(- - ~~~e g) vc{ PD- wt ~-t
Contact Person: ? k.~ V. !4 s Phone Number: ZS oZ 9 - b 9 ~/ ~
For projects with multiple basins, specify which basin this worksheet applies to: S ~ W*z, c~ ~ t3~ s
Permanent Pool Elevation 3 ft. * ~ (elevation of the orifice invert out)
Temporary Pool Elevation S ft ~ ~- (elevation of the outlet structure invert in)
Permanent Pod Surface Area
Drainage Area .
impervious Area
Forebay Surface Area
Marsh 0"-9° Surface Area
Marsh 9"-18" Surface Area
Micro Pod Surface Area ._ ._
a~ ff'U d sq. ft
~!. O S ac.
! • 33 ac.
5~~! "s`q.it.'
G S'O sq. ~.
9 $ V sq. ft.` .._.
~fDr~ sq. ft.
(water surface area at permanent pool elevation)
(on~ite and off-sr~e drainage to the t><+sin}
(an-site and ofl-site drainage b the basin)
(at permanent pool elevdion approximately 1596)'
(at permanent pod elevation approximately 35°~)'
(af pemiadpritpoi~t'eleVatbff~aPproX'imately 35°~)`
(at permanent pool elevation approximately 15°k)"
Temporary Pool Volume
SAIDA used
Diameter of Orifice
II. REQUIRED REMS CHECKI ITT
S.zUy a,. ft.
.oly~
!~ v in.
(volume detained on top of the permanent pool)
(surface area to drainage area ratio)'
(draw down orifice diameter)
initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. _ 1f_a
requirement has not been met, attach an exp/anatlon of why. At a minimum, a complete stormwater management plan sutxniftal includes
a worksheet for each BMP, design calculations, plans and speafications showing all BMPs and outet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
The temporary pool controls ruraif from the 1 inch rain.
:!r' The basin side slopes are no sleepert#rarr 3:1. _ _
A planting plan for the marsh areas with plant species and derrsMes is provided.
` ~ Vegetation above the penrraneM pod elevabion.is .
G'" An emergency dray is provickd b drain the basin.
The temporary pod draws down in 2 b 5 days.
~' ~ /Gf Sedment sbrage is provided n the permanent pod.
~.._ A sediment disposal area is provided.
Acoe~ is provided for maarlerrarrce.
_ A stie specific, sic,~ed and ratarmed operation and mairesnanoe ageerrrerrt is provided.
The area f9 ~Y otTsite arm) s dettrteaked on a site plan.
f1l'~ Access is provided far mairrlerrarroe.
!~ Pharr detafis tar the wetland are provided.
G'' Plan details for the urlet and outlet are provided.
' ~ ~ A site specific operation and rnainlenanoe , signed and notarised by the ~ PAY ~ P (~
1dtpJlh2o.ehnrsiate.nc. .doc).
'Pocket Wetlands have different design parameters and are only assumed to remove 35°k TSS - See pp.19and 20 of the NC DENR
Stomtwater BMP Manual, April 1999.10% open water, 5096 high marsh, 40% low marsh.
.~- ~ ~ ! f. ~ o..°~ ~`vn S ~~ S e e,~ a'~ S~'F'f ~ tAa ~,t 5 ~ S-I-~~1 ~ c~ n b ~S ~ n o~-~- ~`i5 Q r:
Projed No. DWQ
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
At a minimum, a complete stormwater management plan submittal includes a worksheet for each BMP, design calculations, plans and
specifications showing all BMPs and outlet structure details, a detailed drainage plan and a fully executed operation and maintenance
agreement. An incomplete submittal package will result in a request for additional information and will substantially delay final review and
approval of the project
PROJECT INFORMATION (please complete the following information):
Projed Name
Contact Person:
Phone Numt~er:
For projeds with multiple basins, spedfy which basin this worksheet applies to:_ C~~^ ~~ 17 ry ga..s : ~ # 1
Drainage Area:~acres Percent Impervious Area: 5~ °A _ . _ _ _
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of
Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space
provided to indicate the following design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
~licants Initials ,~
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days. --
Please provide routing for 1 yr. 24 hr. event or volume from 1 inch rain /ld~a*-f3 c k --F~
v The basin length to width ratio is greater than 3:1.
The basin side slopes are no steeper than 3:1.
A small permanent pool at outlet orifice is provided to reduce dogging.
An emergency drain to completely empty the basin is provided.
Vegetation plan prepared is spedfied on plans.
Basin to be stabilized within 14 days of oonstrudion is spedfied. -
Sediment storage (20% of detention voume} in addition to detention voume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for dean-out and maintenance is provided.
Inlet plunge pod or other energy dissipation is provided.
Forebay is provided to rapi<-re sediment and minimize dean-out problems.
Uncompac~ed natural soils are utilized bD promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot trebw bottom of basin.
/~_tf used as a temporary sediment basin, plans indicate dean-out prior to final operation.
A site spedfic operation and maintenance plan with the foAowing provisions is provided.
The O&M agreement is signed by the responsible party and notarized.
Project No. DWQ
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
At a minimum, a complete stormwater management plan submittal includes a worksheet for each BMP, design calculations, plans and
specifications showing all BMPs and outlet structure details, a detailed drainage plan and a fully executed operation and maintenance
agreement. An incomplete submittal package will result in a request for additional information and will substantially delay final review and
approval of the project
PROJECT INFORMATION (please complete the following information):
Project Name : 5 ~u.~'aro~ '- l`o.-~e~ t31 u~( ~ 1~ - M t~
Contact Person: J`c~Lu~. ~Uc1k-s Phone Number:
-~ _.
For projects with multiple basins, specify which basin this worksheet applies to:_
Drainage Area:(o,Z..acres Percent Impervious Area:°~ ._. __
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stomtwater Best Management Practices Manual (N.C. Department of
Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space
provided to indicate the following design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
Apalicants Initials .~
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or _
~/ G- capture runoff from 1 inch storm and draw doom over a period of 2 to 5 days. --
Please provide routing for 1 yr. 24 hr. event or volume from 1 inch rain lv? , 2 o v c~ - ~'-~
/J~ li The basin length to width ratio is greater than 3:1.
. C.~~ The basin side slopes are no steeper than 3:1.
~ A small permanent pool at outlet orifice is provided to reduce dogging.
. G' An emergency drain to cornpletely empty the basin is provided.
~ Vegetation plan prepared is specified on plans.
~" Basin to be stabilized within 14 days of oonstrudion is specified. -
Sedimentstorage (20% of detention voume) in addition to detention voume is provided.
Inlet and outlet erosion oonirol measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for dean-0ut and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize dean-out problems.
Uncompad:ed natural sals are utilized bo promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot bebw bottom of basin.
~'" If used as a temporary sediment basin, plans indicate dean-out prior to final operation.
r A site specific operation and maintenance plan with the following provisions is provided.
The O&M agreement is signed by the responsible parry and notarized.
WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Shuford -Tate Boulevard PD-MU Development
Hickory, North Carolina
The wetland detention basin system is defined as the wetland detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation, vegetated
cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days
as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow vegetative cover on
side slopes to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper
functioning.
4. Remove accumulated sediment from the wetland detention basin system semi-annually or when depth is reduced to
75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate
manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet
[wetland] detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth
reading and not readily penetrate into accumulated sediments.
For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the sediment
should be removed to design levels. This shall be performed by removing the upper 6 inches of soil and stockpiling it.
Then the marsh area shall be excavated six inches below design elevations. Afterwards the stockpiled soil should be
spread over the marsh surface. The soil should not be stockpiled for more than two weeks.
When the permanent pool depth reads 2.25 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 3.0'
Sediment R oval EI. 0.75' 75 /°
Sediment Removal Elevation 0.75' 75%
-------------- --
Bottom EI vation 0.0 % ------------------------------------------- ------
FOREBAY
Bottom Elevation 0.0' j 25%
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the forebay or micro-pool surface.
These plants shall be encouraged to grow along the vegetated shelf and forebay berm.
Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed. Wetland
plants should be encouraged to grow in the marsh areas.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the
emergency drain shall be minimized to the maximum extent practical.
7. All components of the wetland detention basin system shall be maintained in good working order.
Page 1 of 2
vnn, LJ• LVV I ! ~ JLnni i. ~~~vv~.~
8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All accumulated
sediment and debris shall be removed from the structure, and a level elevation shall be maintained across the entire
flow spreading structure. Any down gradient erosion must be repaired and/or replanted as necessary.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or
responsibre party.
Print n
Title:
G. ~'~ Ltk! + 5 ~c.~ 0 2 ~ r ~2
_ n-e~.(
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been
sold and a resident of the subdivision has been named the president.
I ~aj~;~ Y. ~ ~3 , a Notary Public for the State of .~1/0~~/>`i ~Yd~ County of
~~~ ~ , do hereby certify that _ G .~/K~t 1'ficr.,~'or~ ~ personally appeared
before me this ~~ ay of n uC~. , ~. and acknowledge the due execution of the forgoing wet
(wetland] detention basin maintenance requirements. witness my hand and official seal,
_ U
~r.~
~ao~ ~
~drl~N Ga~r~r
flab er ftJedP caroww
carwWrlor~ p~lros evr 20, tom
s~
My commission expires_ h~~d/~7
The above Operation and Maintenance AgreemQnt will be binding for alt future landowners of the aforementioned project
sites.
Page 2 of 2
EXTENDED DRY DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Shuford -Tate Boulevard PD-MU Development
Hickory, North Carolina
The extended dry detention basin system is defined as the detention basin and pretreatment area including
forebay.
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the extended dry detention basin system for sediment accumulation, erosion, trash
accumulation, vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover on side slopes to maintain a maximum height of six inches, and remove trash as
needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the extended dry detention basin system (including forbay) semi-
annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed
sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not
adversely impact water quality (i.e. stockpiling near a wet [wetland] detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 3.0'
Sediment moval EL 0.75' ~ 7 /o
Sediment Removal Elevation 0.75' 75%
----------------------------- ------
Bottom E vation 0.0 5% ~ ,
FOREBAY
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the forebay or micro-pool
surface. These plants shall be encouraged to grow along the vegetated shelf and forebay berm.
Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed.
Wetland plants should be encouraged to grow in the marsh areas.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wetland detention basin system shall be maintained in good working order.
Page 1 of 2
vnn, LJ~ LVUf / ~ JGr~in i ~~~~~vv~,~
8. level spreaders or other structures that provide diffuse flow shall be maintained every six months. All accumulated
sediment and debris shall be removed from the structure, and a level elevation shall be maintained across the entire
flow spreading structure. Any down gradient erosion must be repaired andlor replanted as necessary.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or
responsible party.
Print
C, ~~kOJ ~ S 1~,~02~ ~ ~2
Note: The legally responsible party should not be a homeowners association unless more than 5d% of the lots have been
sold and a resident of the subdivision has been named the president.
I ~(,,~j~; ~ ~ ~ ~~ , a Notary Public for the State of ~ ~1 ~Yal ~ County of
_~ ¢~ , do hereby certify that G .~/K o ~ personally appeared
before me this ~r ay of _ .~C~n u~• ~• and acknowledge the due execution of the forgoing wet
(wetland] detention basin maintenance requirements. Witness my hand and official seal,
~r.~
Naar n,eMc
c~rsd~.rt ca.,e-
sta. er NeAB carow+a
Carrwrrron aDNsri rwr 20, 2ou7
sF~
My commission expires_ ~~d~Q'7
The above Operation and Maintenance Agreement will be binding for alt future landowners of the aforementioned project
sites.
Page 2 of 2
Title: ~~.,ts a >,~N~ , Sl-i~~a~c ~ ~Y~''[..oP/~'re~'T'.~L
Address: ~ ~ ~ , ~oi~ zz~' /-~-,~R nI C T~'L o3