20061434 Ver 1_COMPLETE FILE_20060906

RE: North Pointe Executive Park

f t l ? of

Subject: RE: North Pointe Executive Park
From: "Woodie, David" <David. Woodi e@mecklenburgcountync. gov> Date: Thu, 30 Nov 2006 10:54:43 -0500
To: "Cyndi Karoly" <[e-mail]>
CC: <[e-mail]>, "Veenstra, Scott C" <[e-mail]>, "Aug, Joseph"
<[e-mail]>, "Rozzelle, Rusty"
<Rusty.Rozzelle@mecklenburgcountync. gov>
Cyndi,
Thank you for your response. Yes, I was tied up in meetings with bad
reception yesterday.
As to your question: Yes, this is a retrofit project on behalf of
Mecklenburg County. This project is in response to the Huntersville
ordinance and the McDowell Creek Watershed Plan. Utilizing Federal,
State, and Local funding, we requested voluntary land use to implement
water quality bmps in efforts to remove McDowell Creek from its 303d
listing. This project consists of five separate properties, North
Pointe being one of them. We will be installing fifteen rain gardens,
three detention/filtration berms, and one stormwater wetland with in our
designated "focus area 1" per our watershed plan.
This permit is in concern to property that was volunteered at first and
is now in the process of being donated to the county. A unique
opportunity to regain floodplain. I will keep you advised of future
projects.
Thank You again,
David
David A. Woodie, PE, CPSWQ
Mecklenburg County Storm Water Services
700 N. Tryon Street
Charlotte, NC 28202
Phone: [phone]
Fax: [phone]
-----Original Message-----
From: Cyndi Karoly [mailto:[e-mail]]
Sent: Thursday, November 30, 2006 9:52 AM
To: Woodie, David
Cc: [e-mail]
Subject: North Pointe Executive Park
David - I tried to call, but looks like you may live in meetings as I
do, so I'm going around the phone-tag game. I've reviewed the file
materials. Based on the response we received from AMEC on Nov 7, 2006,
we can file this project as "deemed issued with a courtesy copy" on our
database. We won't be sending a written 401 Certification since this
was received as a courtesy copy with no application fee. I think when
we received it there was some confusion - I can't recall another time
when a County applied to place a stormwater facility to resolve issues
for a private property. Just out of curiousity, was this simply an
older office park that never had stormwater facilities in the first
place, and now the County is trying to retro-fit? Is this something
we'll be seeing more of from Mecklenburg County? Thanks in advance for
any info you can provide. Have a good day.
c'a -o t
1 of 1 11/30/2006 11:40 AM
ameO
September 5, 2006
Ms. Amanda Jones
Asheville Regulatory Field Office
US Army Corp of Engineers
151 Patton Avenue 2 0 Q r)1 4 3 4
Room 208
Asheville, NC 28801-5006
Re: North Pointe Executive Park "Bio-berm" COURTESY
Mecklenburg County McDowell Creek BMP Project COPY
Dear Ms. Jones,
In response to your request at our site meeting on June 13?h 2006, attached please find
the Pre Construction Notification and request for a Nationwide 18 permit, for the above
mentioned project. I am hopeful that I have included all of the supporting documentation
necessary for you to evaluate our request on behalf of Mecklenburg County. David Woodie our
project manager with Mecklenburg County Stormwater Services, as indicated by the enclosed
authorization, has granted AMEC authority to request a permit on the County's behalf. David
Woodie can be reached, if the need presents itself, at the following address and telephone
number. David A. Woodie, PE, CPSWQ, Mecklenburg County Storm Water Services 700 N.
Tryon Street Charlotte, NC 28202 Phone: [phone] Fax: [phone]
Please be advised that as the enclosed documentation supports the "Bio-berm" is a non
invasive method of providing a filter for stormwater runoff that requires no heavy machinery be
introduced into a sensitive area such as a wetland. Our cumulative impacts to the wetlands on
this site for this project are 0.0477 acres. The impacts will not require heavy machines as the
"Bio-berm" material will be "blown" into the area.
Attached you will also find a wetland report investigated by and prepared by Mr. John
Soule of Habitat Assessment and Restoration Program, Inc. (HARP). Peer review was provided
by Dr. Jim Matthews also of HARP. I will be happy to address any questions you may have.
Please feel free to contact me at 336.362.6776 or my immediate supervisor Mr. Scott Veenstra
at 704.875.3570.
As stated earlier I am hopeful I have provided you with all the information you need and
on behalf of Mecklenburg County we look forward to a favorable response to our permit request.
Best regards,
AMEC Earth and Environmental, Inc. of North Carolina
Karri Cecil Blackmon
Task Manager
cc: NC Division of Water Quality
David Woodie, PE
file
Gc:?
Scott Veenstra
( Operatio ns Manager
P@90w, E [.q
SEP 6 2006
WEIIANDSANos ORRmw 7@RIeRMCH COPY

Blackmon, Karri Cecil
Subject: FW: North Pointe Exec Park
From: Woodie, David [mailto:[e-mail]]
Sent: Thursday, August 31, 2006 11:30 AM
To: Blackmon, Karri Cecil
Cc: Veenstra, Scott C; Aug, Joseph
Subject: RE: North Pointe Exec Park
Per this email I authorize AMEC to request a Nationwide 18 Permit on behalf of Mecklenburg County for the McDowell Creek
Project.
In addition, I will provide a hard copy submittal in the following day to document this authorization.
Thank You,
David
David A. Woodie, PE, CPSWQ
Mecklenburg County Storm Water Services
700 N. Tryon Street
Charlotte, NC 28202
Phone: [phone]
Fax: [phone]
From: Blackmon, Karri Cecil [mailto:[e-mail]]
Sent: Thursday, August 31, 2006 8:18 AM
To: Woodie, David
Cc: Veenstra, Scott C
Subject: North Pointe Exec Park
Hello,
I hope you are well. Will you proved AMEC with a letter stating AMEC has the authority to request a Nationwide 18 on the
County's behalf? It is required for the PNC. The other alternative is for us to prepare the PCN as if you are requesting it. Then
give to you to execute etc. Please advise to which course you wish. I am in the office through Sunday if you wish to discuss it.
Karri
Karri Cecil Blackmon
Staff Engineer/Scientist
AMEC Earth and Environmental, Inc.
9800 West Kincey Avenue, Suite 190
Huntersville, North Carolina 28078
704 875 3570 office
336 362 6776 mobile
704 875 8718 fax
[e-mail]
wvvw.amec.com
09/01/2006
Nil eA

http://maps2.co.mecklenburK nc us/servlelicom esri esrimap haiimap"ServiceName overvie w&ClientV . 08/31/2000
i I t I i t
Office Use Only: Fonn Version March 05
2 0 0 6 1 4 3 4
USACE Action ID No. DWQ No.
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
1. Processing COURTESY
1. Check all of the approval(s) requested for this project: COPY
® 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: Nationwide 1
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), ch F@00wq
II. Applicant Information
SEP 6 2006
1. Owner/Applicant Information DENR - WATER QUALITY
Name: Mecklenburg County WETLANDS AND STORM ATERBRANCH
Mailing Address: 700 Tryon Street
Charlotte, NC 28202
Telephone Number: 704 336 3873 Fax Number: 704 336 3846
E-mail Address: WoodiDA(a,co.mecklenburg.nc.us
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: AMEC Earth and Environmental Inc of North Carolina
Company Affiliation: hired consultant
Mailing Address: 9800 West Kincey Avenue, Suite 190
Huntersville, NC 28078
Telephone Number: 704 875 3570 Fax Number: 704 875 8718
E-mail Address: [e-mail]
Updated 11/1/2005
Page 5 of 12
Ill. Project Information
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 project: North Pointe Executive Park wetland Bio-berm
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 00537122
4. Location
County: Mecklenburg Nearest Town: Huntersville, NC
Subdivision name (include phase/lot number): North Pointe Executive Park
Directions to site (include road numbers/names, landmarks, etc.): I-77 south to Highway 73
West 0.2 miles right on Northcross Drive 1" driveway on the 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): °N °W
6. Property size (acres): 11.3
7. Name of nearest receiving body of water: Mountain Island Lake via McDowell Creek
8. River Basin: Catawba
(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/admin/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 site is a floodplain along McDowell Creek and adjacent
to North Point Executive Park which is an office complex containing asphalt parking,
interspersed with vegetated islands.
Updated 11/1/2005
Page 6 of 12
10. Describe the overall project in detail, including the type of equipment to be used:- see
attached plan sheets and project description
11. Explain the purpose of the proposed work: see attached "Purpose of Project"
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. no previously requested or approved wetland, stream or buffer impacts
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.
No future permits are anticipated to be requested
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: As noted in the attachment of
"Purpose of Project" this project is designed to treat stormwater runoff before it reaches the
floodplain thereby, preventing the current amount of pollutants from reaching the stream and
ultimately Mountain Island Lake.
Updated 11/1/2005
Page 7 of 12
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
(yes/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)
Location I yes -100 if 0.024
Location 2 yes -100 If 0.0107
Location 3 yes -100 if 0.013

Total Wetland Impact (acres) 0.0477
3. List the total acreage (estimated) of all existing wetlands on the property: 1.3 acres of
wetlands
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 Intermittent?
? Average
Stream Width
Before Impact Impact
Length
(linear feet) Area of
Impact
(acres)
none

Total Stream Impact (by length and acreage)
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
fill, excavation, dredging, flooding, drainace, bulkheads, etc.
Open Water Impact
Site Number
(indicate on map) Name Waterbody
(if applicable) e)
Type of Impact Type of Waterbody
(lake> Pond, estuary, sound, bay,
ocean, etc.) Area of
Impact
(acres)
none

Total Open Water Impact (acres)
Updated H/1/2005
Page 8 of ] 2
6. List t
le cumulative impact to all Waters of the U.S. resulting trom the project
Stream Impact (acres):
Wetland Impact (acres): 0.0477
Open Water Impact (acres):
Total Impact to Waters of the U.S. (acres)
Total Stream Impact (linear feet):
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 detennined to be isolated by the USACE.
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:
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.
No impacts
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.
Updated 11/1/2005
Page 9 of 12
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.
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
httn://h2o.enr.state.nc.us/ncwetiands/strmiiide.htm].
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 plan needed
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
[phone] 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 http://h2o.enr.state.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):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Updated H/1/2005
Page 10 of 12
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 [phone] 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
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.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Neuse), 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 multipliers.
I I Zone* Impact Multiplier Required
(square feed Mitigation
1 3 (2 for Catawba)
2 1.5
Total
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 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. no mitigation required
Updated 11/1/2005
Page 1 I of 12
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. Impervious acreage is - 5.08 acres of a total
11.388 acres during and after construction of berm the impervious acreage will remain the same.
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
No waste water will be generated
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ? No
Is this an after-the-fact permit application? Yes ? No
XIV. Cumulative 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 ? No
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http://h2 o.enr.state.nc.us/newetlands. If no, please provide a short narrative description:
XV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
No other circumstances
q/J12-Cx,?,
Applicant/Agent's Signature Ddte
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Updated 11/1/2005
Page 12 of 12
PURPOSE OF PROJECT
North Pointe Executive Park Bioretention Berm
The proposed two bioretention areas are located in a floodplain adjacent to both
McDowell and Caldwell St. Creeks with very low relief, a series of linear jurisdictional
wetlands. The bioretention areas are also underlain by alluvial soil horizons with high
infiltration capacity with the local groundwater table likely within 1 to 2 feet of the
existing surface. Despite good vertical infiltration rates lateral seepage through the down
slope berm or levee is desired to increase drawndown during the 24 to 48 hours after the
storm event due to the high water table. In addition, the crest of the berm is required to
perform as a level spreader for the larger storms, as bypass diversion channels for this
site would likely entail negative impacts on the existing wetlands. This crest should be
vegetated with riparian shrub species that can withstand expected overflow velocities, but
not include material with stem diameters over 2 inches. Therefore the design criteria for
the bioretention levees includes: long term integrity of form and elevation, good soil
fertility for vegetation, moderate permeability, both short and long term protection from
slope erosion, and enhanced soil and aggregate compositions for added water quality
improvements upon lateral filtration of the impounded bioretention waters. Finally,
installation of these berms should not compact or disturb the existing soil zones on site in
order to maintain infiltration capacities.
To meet these design goals we have proposed adopting the following strategies adapted
and integrated from tested methods within the environmental engineering community.
Low Impact Construction Method: The challenge of constructing approximately 1500
linear feet of an 18" high berm without disturbing the existing floodplain with grading
equipment can be met by using a blower truck. While initially used with small hoppers
or tanks for blowing straw, or seed mixes units are now available for blowing quarry
aggregate or heavier soil mixes. We have contacted two companies (Carolina Mulch
Plus, and ECO-SX) in the Charlotte area and both have agreed to blow a soil mix up to
300 feet from the truck at costs ranging from $35 to $65/cubic yard.
Long Term Integrity and Slope Erosion Control: The need for both immediate and long
term grade and slope erosion control can best be met by incorporating a 4 or 6" thick
cellular containment mat as the upper cover on the berm with the cells filled with the soil
medium. Manufacturer products such as "Geoweb", "Terracell", or "Envirogrid" mats
all are licensed from a common USACOE patent on cellular containment and
stabilization mats and have been utilized in levee, stream bank, and Swale projects that
required the cells to be filled with a soil medium adequate for both grass and woody
species.
Soil permeability, fertility, and filtration potential: The fill to be used to construct the
berm and fill the upper cells of the containment mat needs to support in a saturated state
slopes of at least 25 degrees, have high Cation-Exchange Capacity, relatively neutral pH,
permeabilities of at >1 in/hr, support 5-10 organic amendments without negatively
affecting soil stability, and have minimal post installation consolidation or volumetric
changes (i.e. minimal setting along the crest of the berm). These criteria can be met by
the engineered soils produced by the Stalite Corp. out of Salisbury utilizing one or two of
the blends of kiln-expanded (light weight) slate aggregate that they have used for both
rain gardens and green roof installations. The have had contractors install their soil
mixes using blower trucks to the tops of buildings 7 stories in height, including their 5/16
aggregates. These aggregates have excellent structural properties, utilized primarily for
the manufacturing of light weight concrete. Stalite and ECO-SX have agreed in principal
to build a test berm at the Stalite plant in Stanley County to demonstrate post installation
integrity should that be necessary to demonstrate the viability of the proposed design.
a.
Staking in the Perforated Cellular , A"*p""
Containment Matting for Stabiliz-
ing Top Soil Planting Zone (2:1
Side Slopes)

Completed Permeable Berm;
Matted and Planted with Diver-
sity of Native Species & 2' O. C.
ARP's Permeable "Bio-Berm"
for Bio-retention & Water
Quality Performance
4BITAT
SSESSMENT AND
STORATION
ROGRAM INC.- -'- - ?I?

Str uctural Integrity
Gold Hill Berm
101
100.5
P redictable and Uniform 10%
0 100 Self Compaction Completed
F ---12 June 2006, As•built

20J
une2006, Biow-out
v
-.-

within 30 days of Blower
- 18
July 2006
W 5
-?- 8 August 2006
Prior to Repair
Installation
99 0 10 2 Station 30 40
(feet)
Hydraulic Reliability
7/27/2006
0:00:00 7/28/2006
0:00:00 7/29/2006
0:00:00
15

10
Stable and Predictable 24 h our
Drawdown of 12 - 18" 5
Stormwater Pool
/27/
06 Stor
Ground Level
0

-5
7/6/2006
12:00:00
7/7/2006
12:00:00
Date
7/8/2006
12:00:00
Time
14, 7 _k `

PA
>.

r
'j,
r Water Qu ality Performance
93% Turbidity
Removal
Efficacy
400
10
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340 NTV

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s
- - - - - - - - - - - -
nmter '
200
M
`
? 'i •{ 100
24NTVs
I.
S
°.y S
torm Retention Even
t

24 hours mmmmmil

'

7/7/06 Storm
i
. i
ji
LEGEND
t? r
Srormwoter Catch Basin Exfiltration to 6roundwoter
and assoc. Infrastructure
. +?..r .. ""+?i'^:.- '? -4'?» - sty
r Presumed Rooftop Storm.
,. 46 Lateral Filtration to Downslope
water Comnyance
Wetlands
Iw_
StormwoterOWfofl
Stormwater Wetland
(', r1 '+mz,,, "?,,,q.`. Stormwater Sediment ,?
1^'?i»° I7 w. ?'+? Basin • Failed Riser 4\\\ with n 48 hour Detention
on first 1" Impervious Vol,
EmbanioneM•Bare Seepage
(f n r;
Level Spreader Infiltration Test Site
t I r K S ti:. sy t li e.
Catchment Area: 4.1 Acres' • . t r .' .. "!r`>rc,.' n yh
70%Irn ervious
^w ." k
3aAcres O 100 200 FT
?? -+. ., , Ca ichrnrni Ar'eu'
69%Im rnaus SCALE
366 1 5 ?. - :.t -.v-. r
'WIW III .LL' '`h('. } /y aL? tf'?e •Y
• Mori.; ? w ? i ;? .r ? " !?? No
i Q f z 4671K
Weiland bnpach
%
646 IP
,? s, r I?, ?k ? Wdtyndlmpi?k?T
l \ p P
for 10 Vr* -,X
4rin
.; 1. w°?? a ,. "vrr ??t•.r .,A'r. ,uw,,{ .#_? YI'
xisting Wetlands
ASSESSMENT AND McDowell Creek Watershed Restoration Birkdale Business Park Site; Optional Conceptual Design for
RESTORATION ` Stormwater Wetlands Project Stormwater Wetland BMP`s with approx. 2075 ft2 of Impacts May 2006
PROGRAM H?.---- '- on Existing Jurisdictional Wetlands
? I
I
HABITAT
ASSESSMENT AND A
RESTORATION wit I ?"U
PROGRAM, INC.____.,__
Birkdale Office Park
Wetland Determination and Recommendations
JIM MATTHEWS, Ph.D.
T. LAWRENCE MELLICHAMP, Ph.D.
P.O. Box 655
Newell, NC 28126
Office: 704-841-2841
Pax: 704-841-2447
Cell: 704-577-6717
email: [e-mail]
www.habitatassessment.com
A site visit was made on the 5 h of August 2005 to determine if jurisdictional streams or
wetlands were present in approximately a 3-acre area of the Birkdale Office Park. See
Figure 1. The area is bordered to the west by McDowell Creek, to the east by the
Birkdale Office Park parking lot, and is to the north and south of the footbridge that
crosses to Birkdale Village. See Figure 2.
It was found that jurisdictional wetlands are present above, (north), and below, (south) of
the footbridge to Birkdale Village.
Above the footbridge, the USGS Lake Norman South Quad map shows a small, unnamed
tributary to McDowell Creek. This area also has wetlands and the Mecklenburg County
POLARIS GIS maps a small stream with a 35' SWIM buffer. See Figures 2 and 4.
Historically, this stream with a 35' SWIM buffer connected to McDowell Creek It
currently parallels McDowell, has no riffle-pool structure, no stream banks, no channel
substrate, and it has no wrack material or drift lines. Aerial photos show it to be without
meanders. It does have Eastern Mosquitofish, Gambusia holbrooki. This area has
wetland vegetation, wetland hydrology, and hydric soils within the upper 12 inches.
According to the NC Division of Water Quality. 2005. Identification Methods for the
Origins of Intermittent and Perennial streams, Version 3.1. North Carolina
Department of Environment and Natural Resources, Division of Water Quality. Raleigh,
NC., this small channel is a Ditch and not a Modified Stream. The USACE may need to
make a call on this channel.
Modified Natural Stream -'Modified natural stream' means an on-site channelization
or relocation of a stream channel and subsequent relocation of the intermittent or
perennial flow as evidenced by topographic alterations in the immediate watershed.
A modified natural stream must have the typical biological, hydrological, and physical
characteristics commonly associated with the continuous conveyance of water. 15A
NCAC 02B.0233(2)(h)
Ditch -Ditch or canal' means a man-made channel other than a modified natural
stream constructed for drainage purposes that is typically dug through inter-stream
divide areas. A ditch or canal may have flows that are perennial, intermittent, or
ephemeral and may exhibit hydrological and biological characteristics similar to
perennial or intermittent streams. 15A NCAC 02B .0233(2)(c)
HABITAT ANALYSIS - ENDANGERED PLANT STUDIES - RESTORATION OF HABITATS - WETLAND MITIGATION - MONITORING
A stream channel is perennial when any of the following criteria are met:
1. Biological indicators such as fish, crayfish (in channel), amphibians
(larval salamanders and large, multi-year tadpoles), or clams are
present. If only crayfish or fingernail clams are present, a numerical
value of at least 18 on the geomorphology section of the most current
version of the DWQ stream classification form is required.
Below the footbridge the USGS Quad map shows no streams other than McDowell
Creek. The perennial wet ditch with the 35' SWIM buffer, (Soil Pit #2), continues
southward to Sam Furr Road. There is a small wetland polygon just below the bridge,
(Soil Pit # 3), between the ditch and the parking lot. The area between the ditch and
McDowell Creek, (Soil Pit #1), has wetland vegetation but does not have wetland
hydrology or hydric soil within the upper 12 inches. See Figure 5.
HARP recommends that any plans for BMP placement be below the footbridge and be
designed as wetland enhancement or creation. This area is floodplain between Caldwell
Station Creek and McDowell Creek. It is the Monacan soil series, (MO), somewhat
poorly drained, moderately permeable soil that formed in recent alluvium Slope ranges
from 0 to 2 percent. These soils have low potential for all urban uses because of the
wetness and flooding. It has a water table close to the surface and is prime area for
wetland creation. See Figure 3.
For the USACE to make a call on this site the wetland areas would need to be delineated
and surveyed with a plat created following the USACE requirements below.
The following applies to plats or plans submitted to the Corps of Engineers for confirmation of
Section 404 jurisdiction:
1. In addition to the applicant's copies, one legible paper copy on 11X17 inch or smaller
paper (multiple sheets with matchlines are acceptable), or a digital copy on disk
(Autocad or Microstation are acceptable) must be submitted for Corps files.
2. Distances and bearings must be printed legibly along side the lines or in an arranged
table.
3. Area of wetlands depicted (square feet or acreage), or linear measurements allowing
the area to be calculated should be shown.
4. The plat must be sealed or signed by the surveyor.
5. If non jurisdictional wetlands are present, we recommend that some legible method
(e.g. hatching, or an arrow indicating isolated those wetlands) be used to identify the
wetland on the survey. Determination of non jurisdiction must first be approved by
the Corps.
6. The following paragraph of certification should be printed on the survey with the
signature lines.
For sites where a portion of the actual jurisdictional boundary is depicted (such as when
only the impact areas were delineated):
"This certifies that this copy of this plat accurately depicts the boundary of the jurisdiction of Section 404
of the Clean Water Act in the areas impacted by the present proposed activity, as determined by the
undersigned on this date. Other areas of jurisdiction may be present on the site by have not been
delineated. Unless there is a change in the law or our published regulations, this determination of Section
404 jurisdiction may be relied upon for a period not to exceed five years from this date. This determination
was made utilizing the 1987 Corps of Engineers Wetlands Delineation Manual."
Name:
Title:
Date:
AID:
When the plat is completed HARP will submit the necessary documents to the USACE
with a cover letter requesting a determination.
John T. Soule
Environmental Biologist/Botanist
Habitat Assessment and Restoration Program
P.U. Box 655
Newell, NC 28126
[phone] cell
[phone] fax
SOILS
Map Unit Name
(Series and Phase): Mo r 1"An `n Q ('_? n
Drainage Class: SPD
GG
Taxonomy (Subgroup): F(c/ VCLyc/en6' C
Fai!'D '>'l rel!] Field Observations
f S Confine Mapped Type? Yes No
Profile Description:
Depth Matrix Color Mottle Colors Mottle Texture, Concretions,
inches Horizon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure, etc.

Q -? { c P Z- 5 Y? LP /
C) 2 preJ U I I" Amy / 1 /00 _`
1-3 I3 ?,e'(P '418 CIO,,

Hydric Soil Indicators:
_ Histosol _ Concretions
_ Histic Epipedon _ High Organic Content in Surfa ce Layer Sandy Soils
_ Sulfidic Odor Organic Streaking in Sandy Soils
- Aquic Moisture Regime _ Listed on Local Hydric Soils List
Reducing Conditions -
? Listed on National Hydric Soils List
Ieyed or Low-Chroma Colors - Other (Explain in Remarks)

Remarks: So
?I
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes No (Circle) (Circle)
Wetland Hydrology Present? es No
Hydric Soils Present? es No Is this Sampling Point Within a Wetland? f Yes No
Remarks:
Approved by HOUSACE 3192
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/Site: a/Rk fJxle.6 OFFICE PARK ' Date: Q4 Aal ZaeS
Applicant/Owner. AMEr-, 9800 . KI r- ET AV E., HU tERSYtLl-G County:Mcr-Lak3ul
(-{ ASR P -9-T. S dU 1- G 1 L, F. GA FF:7t,37-`l
Investigator. State: NC_
_
Do Normal Circumstances Exist on the- site? /Yes ' No
Is the site significantly disturbed (Atypical Situation)?
Is the area a potential Problem Area? Yes Ct-Eo) Community ID : P551
Transect ID:
Plot ID: Sri
(If needed, explain on reverse.)
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator

1. ?LyAaGK S e C?L15u5
FACUI .I- r
s Lr gty.c/ .ry, t7 ?f Styr - u8% T
--
FAc -

; ilrCi-rV? f-, N
2- AsGle??n
o:B L- r
,o.Vdis ro4uod;fdi'a, WV
FAc
,
3. Leers i`ck cry zvi dp, . H G 8 L ,,. Le,5 . Jeza Con ect? ? H L(PL-
a.r-,sacciry? r ae?ylcndes R F-A- - 12.l?yd?er?cr1wl ?ut-} F:Ac
t t
S.RC1?9o>tUyyf SA!y'A0fUM N
OBL
rACW I-
s. 5r cfcr ?o 12-ig os? FAG ,a.
UPL 15.
s.??a° I^NnPr n C, r'???i Grt { FA?«,I f 15.
Percent of Dominant Species that are OBL, FACW or FAC I l /!
(excluding FAC-).
c.
Remarks: We-06w10
HYDROLOGY
Recorded Data (Describe in Remarks): Wetland hydrology Indicators:
_ Stream, Lake, or Tide Gauge Primary Indicators:
Aerial Photographs _ Inundated
_ Other Saturated In Upper 12 Inches
IZNo Recorded Data Available Water Marks
Drift Lines
_ Sediment Deposits
Feld Observetions: Drainage Patterns in Wetlands
b?1? Secondary Indicators (2 or more required):
Depth of Surface Water. (in.) V/ Oxidized Root Channels in Upper 12"

/f Water-Stained Leaves
Depth to Free Water in Pit: (in.) Local Soil Survey Data
t? _ FAC-Neulral Test
Depth to Saturated Soil:: (in.) _ Other (Explain in Remarks)
Remarks: We- -k wd -PcC-fe;_ :
,or 1 t
SOILS
Map Unit Name
(Series and Phase): M U NAOlil 0 L' (in S D
Drainage Class:

Taxonomy (Subgroup): ' V11 L tom! L(l?Q C? L(e nrrCwk) t'e Field Observations
E !? e r r ' 1
ID lS Confirm Mapped Type? Yes `No
Profile Description:
Depth Matrix Color Mottle Colors Mottle Texture, Concretions,
inches Horizon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure, etc.
0-5 rn611Y Poorsrop'e'
10-ti [CO,wi
(2-/ IeYR 413 -- Gee,' (a0"/'
/I[to ?` joyEz S ( 2.51 . 3/(P ? r?/?t! f `OClivn
Hydric Soil Indicators:
Histosol
v _ Concretions
Histic Epipedon
- _ High Organic Content in Surface Layer Sandy Soils
Sullidic Odor _ Organic Streaking in Sandy Soils
- Aquic Moisture Regime Listed on Local Hydric Soils List
Reducing Conditions _ Listed on National Hydric Soils List
r/ Gleyed or Low-Chroma Colors - Other (Explain in Remarks)
Remarks: L D ,c) rr-r I cf i C. t ?) I iI
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes No (Circle) (Circle)
Wettand Hydrology Present? Yes Wo
H
ydric Soils Present? Yes Is this Sampling Point Within a Wetland? Yes No
Remarks:
I no r'r
Approved by HOUSACE 3192
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/Site: 1 D&Le_ C>FFc.G P'4Rlc Dale: 0(a UG ZQPS
Applicant/Owner APAEC -080o Klest K•`rl ce v. uvtrersv, e- County: ' CY_L M8u?
Investigator: -ARP. T. Sc_? ?.I L 1 L.R, GAt t?h CY State: WC

Do Normal Circumstances Exist on the site? Yes No Community ID: P551
Is the site significantly disturbed (Atypical Situation)? es o Transect ID:
Is the area a potential Problem Area? Yes (o Plot ID: =.? # 1
(if needed, explain on reverse.)
VEGETATION
lant Species Stratum
Domin
nt Indicator Dominant Plant Species Stratum Indicator
a
P
1. j o `.f C1 Q 9 o r (A 05

z A,Le .?' ?c.tr'1i Ceu
OBL. •? `( r?
1o. B6r_1A C.y bi ?t ??ka F}
F A-C_vJ
3. t?C:l (a ?!`• `J P, l fPL 11. ?..'„.:.?I'.:? p•; Vrt'gi?u Fr ii fG
a. L,'gcr,'c?n,?,ICJc rRrt'(tjr_ Y EAc+
na????r.rrig F)
12Arocyr1 crhA 111
Floc -
5. YritS vial EA C
F14Ct1d 14.
7.l •r ,- ,. t",. r: FAC 15.
F AC\. j 16.
Percent of Dominant Species that are OBL, FACW or FAC -.-2 '.
Z C
(excluding FAC-).

Remarks:
c-,,.,. ,

r,, -?,
HYDROLOGY
_ Recorded Data (Describe in Remarks): Wetland hydrology Indicators:
Stream, Lake, or ride Gauge Primary Indicators:
_ Aerial Photographs Inundated
_ Other _ Saturated in Upper 12 Inches
J? No Recorded Data Available Water Marks
u
Drift Lines
Sediment Deposits
Field Observations: Drainage Patterns in Wetlands
lint 1G Secondary Indicators (2 or more required):
'
Depth of Surface Water. (in.) Oxidized Root Channels In Upper 12

I ?' ' l>= Water-Stained Leaves
Depth to Free Water in Pit:
(in.) Local Soil Survey Data
FAC-Neutral Test
(in.)
Depth to Saturated Soil: _ Other (Explain in Remarks)
/
Remarks: ,NGI f0"',0/ { i'(? V6 to jc; l1C ?'N" ;
SOILS
Map Unit Name ,1
(Series and Phase): Mo r IV10 ) C1'2,a V1
Drainage Class: C-- p

Taxonomy (Subgroup):fert?liG ??Gli/C4quen?7rL' 11 II Feld Observations
LITi'oCJleeConfirm Mapped Type? Yes No
Prnfi(e Description:
Depth Matrix Color Mottle Colors Mottle Texture, Concretions,
inches Horizon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure, etc.
A TSY2 -4
-
ri45
atzc,ul,? t?,a??j
_
%% -; is ? _ -- -'. ?,_ ? q _ =! ?(.i:• - ? ,. ? ! :^_? : Ji9.,,"
r i
Hydric Soil Indicators:
_ Histosol Concretions
_ Histic Epipedon _ High Organic Content in Surfa ce Layer Sandy Soils
_ Suliidic Odor _ Organic Streaking in Sandy Soils
Aquic Moisture Regime _ Listed on Local Hydric Soils List
_ Reducing Conditions _ Listed on National Hydric Soils List
1/Gleyed or Low-Chroma Colors - Other (Explain in Remarks)
Remarks: r? r ( !
WETLAND DETERMINATION
C(Ar-j iD?YI^
Hydmphydc Vegetation Present? ge-s No (Circle) (Circle)
Wetland Hydrology Present? No
Hydric Soils Present? No Is this Sampling Point Within a Wetland? Yes No
Remarks: 7j?i5 A-PPEArPS Tc) BE A PERE/JMIAL IM ET E-T 1J1TCH,
MECKLE-I,IF3UP_6 0- 001-ITY 'P0(-)4R)S 6?bvAS A 35i --WI M -Bd FGP.
b!? -?}Ils t?ITC") INPL? )rN6 TO-T IT lS A STREANA, LISGS QUNfJ,
St?ot,as t10 'STFC-Anti 4-I;RE IN T14E -PAST, T7- 5coAC-S 4ant -j'
1 ?o/)JTS 01,i 2005 NC-LMQ 57-RE4AA ,YD FORhA,
Approved by HOUSACE 3192
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/Site: B)RkbALE aFFtCI=. Pr4R1- Date: ptp W16 Zoos
Applicant/Owner. AMEC 98ob I CET A E., Lt TEL-s 11,t.E County: P>^[ '?,!..=,- 1(crG ?
Investigator RC', fT, sou! E , (.,r. Get; i t?E State: SIC _

Do Normal Circumstances Exist on the site?

Y
e
No
CommunityID : P551
I h i e
s te stsignificantlydisturbed (Atypical Situation)?
e
s No Transect ID:
Is the area a potential Problem Area? es No Plot ID:
(if needed, explain on reverse.)
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1.Lzers?a o?'?lzr???{es o a({ernt?v(ia ?F-S L-
t?? ?L{1flGiQ ? 0 iS L 1o.T"C.- y?10 F-AG
3.. I rf (-E FAA 11

5. G, i 1? l i n s s l n L(. o a a 13.
4
fi./ cyt;ndri'ca PACW1- 14.
'
T O(I /ODOU ;11'? -?D( iI ILt jaw tt ?B 15.
U13 t_ 16.
Percent of Dominant Species that are OBL, FACW or FAC / C
(? = UD jo
(excluding FAC-).
Remarks: V1?1
HYDROLOGY
_ Recorded Data (Describe In Remarks): Wetland hydrology Indicators:
_ Stream, Lake, or Tide Gauge Primary Indicators:
Aerial Photographs Inundated
Other ?Saturaled in Upper 12 inches
-I, No Recorded Data Available _ Water Marks
Drift Lines
_
_ Sediment Deposits
Field Observations: _ Drainage Patterns in Wetlands
It Secondary Indicators (2 or more required):
?
"
Depth of Surface Water. (in.) Oxidized Root Channels In Upper 12
Water-Stained Leaves
Depth to Free Water in Pit: f ( n.) Local Soil Survey Data

Depth to Saturated Soil:
_(I,.) FAC-Neutral Test
_ Other (Explain in Remarks)
Remarks: ell ?tQl yd roipgY Tve5&.;'

a
• w

- w
_,.p

'
C
y

ya r ?, ? y
5f ;

dwk

x

`..
5
c; ... _

e,

Lo d.
n,.?ti1f? ?Jl ?. ?4?'C f- ??? i._? Ldp.! 1.1: r^'.i?• ? .'??r,. ?° ? ???'; C', rd Fah,. b :7?'?n T. ?'_?J.E
Birkale Office Park

i,o c A-`)A';:
R
t Braun- o^ -
USES Topographic
Map
'J
11

Figure ? ?n
;
-?
feet
9

C..n I l?in t,
f,1AF 5C'JP,.^_E- U57+?. 5C5. Soil S-unrey of ?IeCk,encL^3 Coin.
HABITAT Birkdale Office Park
ASSESSMENT AND
RE-?r°R.-. Soils Map
P R'-:GRAM •.r.?
Figure
A
eB2

Y
:.arton? aCny c>. Jo?n". ;o,le
V inU i
Feet
MAP 50URCE. MecklenLurh County POLARI5. 2004 Aerial Photography
Birkdal
H An TA;
ASSEIBMENTAND
R F 6T ORAT ION
P ROGRAM INC
Office
Aerial with SWIM Buffers, FEMA 1
Figure 4
Floodplain
1?()1t}l
feet
I
FOOTBRIDGE

A lj .
i
1
1
1
1

iestigation Limits
w1/1; A I F (.I. [A'!( II"fth o I i.<. I V., I'i i,P•,hY`? ,i li.,?rn1>fr,? I-.j. Ir,lvi 1 `,?ndr
f3irkdale Ollice Park
A,.,,i .Ml ""'' Approximate Wetland Boundaries
Ri
P F,?rd:;,in a 100 21,10 MoD
Figure 5
feet

.,:?,
R
amen
November 6, 2006
Ms. Cyndi Karoly, Supervisor
Division of Water Quality J d r- j L f-
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
SUBJECT: North Pointe Executive Park
McDowell Creek [030833,11-115-(5), WSIV, CA]
Request for More Information
Dear Ms. Karloy:
We have received and reviewed your Request for More Information, dated October 31,
2006, and are responding with this correspondence to assert that we do remain
interested in continuing to pursue permitting of this project.
It appears that our application information may have been unclear as to the actual plans
for this project (versus the existing site conditions). The existing conditions at the entire
property were properly represented in the application as 44.6% impervious. However, it
was not clearly communicated that the scope of this project to install two bio-retention
areas will occur entirely within the floodplain along McDowell Creek, and as such, the
total impervious area within the project footprint should be noted as 0%. This proposed
project will not create additional impervious area.
Also note that the US Army Corps of Engineers has provided at General Permit
Verification to Mecklenburg County for this project (attached for reference). Ms. Amanda
Jones (USACE) visited the site as part of the PCN review.
Given the actual proposed project, we do not believe that it is necessary to resubmit the
Pre-Construction Notification application provided the DWQ accepts this
correspondence as sufficient clarification.
Please contact me if you have any questions regarding this correspondence.
Respectivefully Submitted,
AMEC Earth and Environmental, Inc.
Scott C. Veenstra
Operations Manager
cc: Mr. Alan Johnson, DWQ Mooresville Regional Office
Mr. David Woodie, Project Manager Mecklenburg County
AMEC Earth & Environmental, Inc. YID((J ?a?
9800 West Kincey Avenue, Suite 190 ,,( ''??11 Itta°?JJI
Huntersville, North Carolina 28078 IIIJJJ???
Tel +[phone]
Fax +[phone] www.amec.com NOV 7 200
0ENR - VVATER uUALI TY
WETLANDS AND , TORmWATER BRANCH
I , A
U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT
Action ID. SAW-2006-40715-360 County: Mecklenburg USGS Quad: Cornelius
GENERAL PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION
Property Owner / Authorized Agent: Mecklenburg County / Attn: David Woodie
Address: 700 Tryon Street
Charlotte„ NC 28202
Telephone No.: 704-336-3873
Size and location of property (water body, road name/number, town, etc.): This site is located at the
North Pointe Executive Pointe, adjacent to McDowell Creek, in Huntersville, Mecklenburg County,
North Carolina.
Description of projects area and activity: This permit authorizes the placement of till associated with
the construction of bio-berm for improved storm water manangement. Impacts to wetlands
authorized by this permit are 0.048 ac: e.
Applicable Law: ® Section 404 (Clean Water Act, 33 USC 1344)
? Section 10 (Rivers and Harbors Act, 33 USC 403)
Authorization: Regional General Permit Number:
Nationwide Permit Number: 18
Your work is authorized by the above referenced permit provided it is accomplished in strict accordance with the
attached Nationwide conditions and your submitted plans. Any violation of the attached conditions or deviation
from your submitted plans may subject the permittee to a stop work order, a restoration order and/or appropriate
legal action.
This verification is valid until the NWP is modified, reissued, or revoked. All of the existing NWPs are
scheduled to be modified, reissued, or revoked prior to March 18, 2007. It is incumbent upon you to remain
informed of changes to the NWPs. We will issue a public notice when the NWPs are reissued. Furthermore, if you
commence or are under contract to commence this activity before the date that the relevant nationwide permit is
modified or revoked, you will have twelve (12) months from the date of the modification or revocation of the NWP
to complete the activity under the present terms and conditions of this nationwide permit. If prior to the expiration
date identified below, the nationwide permit authorization is reissued and/or modified, this verification will remain
valid until the expiration date identified below, provided it complies with all new and/or modified terms and
conditions. The District Engineer may, at any time, exercise his discretionary authority to modify, suspend, or
revoke a case specific activity's authorization under and NWP.
Activities subject to Section 404 (as indicated above) may also require an individual Section 401 Water Quality
Certification. You should contact the NC Division of Water Quality (telephone [phone]) to determine
Section 401 requirements.
For activities occurring within the twenty coastal counties subject to regulation under the Coastal Area
Management Act (LAMA), prior to beginning work you must contact the N.C. Division of Coastal Management.
This Department of the Army verification does not relieve the permittee of the responsibility to obtain any other
required Federal, State or local approvals/permits.
If there are any questions regarding this verification, any of the conditions of the Permit, or the Corps of
Engineers regulatory program, please contact Amanda Jones at 828-271-7980 x231.
Corps Regulatory Official Amanda Jones Date: October 6, 2006
Expiration Date of Verification: March 18, 2007
CF: AMEC Earth & Environmental, Inc. / Attn: Karri Blackmon, 9800 West Kincey Ave., Suite 190,
Huntersville, NC 28078
r'
0? W A 7-F9 Michael F. Easley, Governor
William G. Ross Jr., Secretary
f? 7 North Carolina Department of Environment and Natural Resources
p .C Alan W. Klimek, P.E. Director
Division of Water Quality
October 31, 2006
DWQ Project # 06-1434
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mecklenburg County
700 Tryon Street
Charlotte, NC 28202
Subject Property: North Pointe Executive Park
McDowell Creek [030833,11-115-(5), WSIV, CA]
REQUEST FOR MORE INFORMATION
Dear Sir or Madam:
On September 7, 2006, the Division of Water Quality (DWQ) received your "Courtesy Copy" application
dated September 5, 2006 to impact 0.0477 acres of 404/wetland to construct the proposed two bio-
retention areas. The DWQ has determined that your application was incomplete and/or provided
inaccurate information as discussed below. The DWQ will require additional information in order to
process your application to impact protected wetlands and/or streams on the subject property. Therefore,
unless we receive the additional information requested below, we will have to move toward denial of your
application as required by 15A NCAC 2H.0506 and will place this project on hold as incomplete until we
receive this additional information. Please provide the following information so that we may continue to
review your project.
Additional Information Requested:
1. Under Section XI. -Ntormwater (required by DWQ) on page 12 of 12 of your application,
regarding the proposed project imperviousness your response to the question was, "Not
Applicable". You state that the impervious acreage is 5.08 acres of a total of 11.388 acre (44.6
percent impervious). You are seeking approval for your project under General Water Quality
Certification No. 3402 (Nationwide 39) which states, "Additional site-specific stormwater
management requirements may be added to this Certification at DWQ's discretion on a case by
case basis for projects that have or are anticipated to have impervious cover of greater than 30
percent. Site-specific stormwater management shall be designed to remove 85% TSS according
to the latest version of DWQ's Stormwater Best Management Practices manual at a minimum."
Since your proposed project imperviousness will exceed 30 percent, please revise your Pre-
Construction Notification application and resubmit five (5) copies of the PCN application, and the
appropriate fee of $200.00 to the DWQ.
Please contact the DWQ within three weeks of the date of this letter to verify that you have received this
letter and that you remain interested in continuing to pursue permitting of your project and will be
providing the DWQ the requested information at a later date. Please contact me in writing and Alan
Johnson of the DWQ Mooresville Regional Office. If we do not hear from you within three weeks, we
will assume that you no longer want to pursue this project and we will consider the project as withdrawn.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.c r state nc.us/ncwetlands
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Page 2 of 2
October 31, 2006
This letter only addresses the application review and does not authorize any impacts to wetlands, waters
or protected buffers. Please be aware that any impacts requested within your application are not
authorized (at this time) by the DWQ. ,Please call Ms. Cyndi Karoly or Mr. Ian McMillan at 919-733-
1786 if you have any questions regarding or would like to set up a meeting to discuss this matter.
Sin rely
oCyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBK/ijm
cc: Alan Johnson, DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
AMEC Earth and Environmental, Inc. of North Carolina, 9800 West Kincey Avenue, Suite 190,
Huntersville, NC 28078
Filename: 061434NorthPo inteExecutivePa rk(Mec klen burg)On_Hold
DWQ 011-1434 North Point Executive Park
Subject: DWQ 06-1434 North Point Executive Park
From: Laurie Dennison <[e-mail]>
Date: Tue, 31 Oct 2006 13:54:05 -0500
To: [e-mail]
CC: [e-mail]
Please see attached the Division of Water Quality's request for more information related
to your recent application. Please note that this message is being forwarded to you
electronically so that you may expedite preparation of your response. Please do not send
your response as a reply to this e-mail or via fax. The hard copy is being sent via US
Mail. All response correspondence is to be mailed via hard copy to the 401 Oversight and
Express Permits Unit, 2321 Crabtree Blvd., Raleigh, NC, 27604 unless otherwise noted.
Content-Type: application/msword
061434NorthPointeExecutivePark(Mecklenburg)On_Hold.doc
Content-Encoding: base64
1 of 1 10/31/2006 1:55 PM
Triage Check List
Date: 9/08/06 Project Name: North Pointe Executive Park
DWQ #:06-1434
County: Mecklenburg
Alan Johnson, Mooresville Regional Office
To:
60-day Processing Time: 9/06/06 -11/04/06
From: Cyndi Karoly Telephone : [phone]
The file attached is being forwarded to you for your evaluation.
Please call if you need assistance.
? Stream length impacted
? Stream determination
Wetland determination and distance to blue-line surface waters on USFW topo maps
? Minimization/avoidance issues
? Buffer Rules (Meuse, Tar-Pamlico, Catawba, Randleman)
? Pond fill
Mitigation Ratios
? Ditching
? Are the stream and or wetland mitigation sites available and viable?
? Check drawings for accuracy
Is the application consistent with pre-application meetings?
? Cumulative impact concern
Comments: As per our discussion regarding revision of the triage and delegation processes,
please review the attached file. Note that you are the first reviewer, so this file will need to be
reviewed for administrative as well as technical details. If you elect to place this project on hold,
please ask the applicant to provide your requested information to both the Central Office in
Raleigh as well as the Asheville Regional Office. As we discussed, this is an experimental, interim
procedure as we slowly transition to electronic applications. Please apprise me of any
complications you encounter, whether related to workload, processing times, or lack of a "second
reviewer" as the triage process in Central had previously provided. Also, if you think of ways to
improve this process, especially so that we can plan for the electronic applications, let me know.
Thanks!