20150917 Ver 1 _Cover ltr _20150904

C-
LETTER OF TRANSMITTAL
To: Ms. Karen Higgins Date
NC DWR, 401 & Buffer Permitting Unit
512 North Salisbury Street
Raleigh, North Carolina 27604 m �
SEP 0 2015
OCNR - WATER
40 6 RESOURCES
RIW771►vG
September 4, 2015
2015091
** HAND DELIVER **
Re: Middleton Residential Subdivision — Job No.: MIH -15000
Apex/Wake County
Nationwide Permit 29/ GC 3890
I am sending you the following item(s):
COPIES DATE NO. DESCRIPTION
5 Nationwide Permit 29 /GC 3890
5 PCN / Exhibits
1 Digital Copy
1 Submittal Fee: $570
These are transmitted as checked below:
❑
As requested
®
For approval
❑
For review and comment
Remarks:
Copy to:
Raleigh- Durham
2905 Meridian Parkway
Durham, North Carolina 27713
(919) 361 -5000
❑ For your use
"� -
Signed: � /4'7 •, /
kevin Yates
Ar. Environmental Consultant,
Project Manager, Water
Resources and Infrastructure
Charlotte
11301 Carmel Commons Blvd., Suite 111
Charlotte, North Carolina
(704) 527 -0800
Designing Tomorrow's Infrastructure & Communities
McAdamsCo.com

LETTER OF TRANSMITTAL
To: Ms. Karen Higgins
NC Division of Water Resources
512 North Salisbury Street
Raleigh, North Carolina 27604
Re: Middleton Residential Subdivision —
Apex/Wake County
Nationwide Permit 29/ GC 3890
am sending you the following item(s):
c A A s
Date: September 2, 2015
REGULAR MAIL
Job No.: MIH -15000
COPIES DATE NO. DESCRIPTION
5 Nationwide Permit 29 /GC 3890
5 PCN / Exhibits
1 Digital Copy
1 Submittal Fee: $570
These are transmitted as checked below:
❑ As requested
® For approval
❑ For review and comment
Remarks:
Copy to:
Raleigh- Durham
2905 Meridian Parkway
Durham, North Carolina 27713
(919) 361 -5000
❑ For your use
El
Signed:
Kevin Yates
Sr. Environmental Consultant,
Project Manager, Water
Resources and Infrastructure
Charlotte
11301 Carmel Commons Blvd., Suite 111
Charlotte, North Carolina
(704) 527 -0800
Designing Tomorrow's Infrastructure & Communities
McAdamsCo.com

�J McADAMS
September 2, 2015
Ms. Karen Higgins
NC Division of Water Resources
401 & Buffer Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699 -1617
Re: Nationwide Permit 29 /GC 3890
Middleton Residential Subdivision
Apex, North Carolina
MIH -15000
Dear Ms. Higgins:
On behalf of MI Homes of Raleigh, LLC we are applying for a US Army Corps
of Engineers (USAGE) Nationwide Permit 29 and an NC Division of Water
Resources (DWR) Water Quality Certification 3890 for proposed impacts to
jurisdictional waters associated with the proposed residential development
project known as Middleton. The subject property and project area is located
off of Holt Road approximately 0.25 miles north of its intersection with Old
Jenks Road in Apex, Wake County, North Carolina The project lies within the
Jordan Lake Watershed in the Cape Fear River Basin. The following attachments
are included as part of this permit application:
0 Signed Agent Authorization Forms
McAdamsCo.com Designing Tomorrow's Infrastructure & Communities
•
PCN Form
•
Fig.I - USGS Quad —Cary SW
•
Fig.2- Wake County Soil Survey (Sheets: 55/56)
•
Fig.3- Existing Conditions — GIS Based Aerial
•
Fig.4.0- Overall Existing Conditions w. Aerial
•
Fig.4.1- Ex. Conditions Map (Survey) w. Aerial (East /West)
a
Fig.4.2- Ex. Conditions Map (Survey) w /out Aerial (East /West)
The John R. McAdams
•
Fig.5.0- Overall Impact Map (w/ Insets 1 -13)
Company, Inc.
•
Fig.5.1 — Overall Impact Map (East /West)
*
JD correspondence package
Raleigh / Durham, NC
+�
NCDMS — ILF Acceptance Letter
2905 Meridian Parkway
•
USFW Ltr Dated 08/21/2015
Durham, North Carolina 27713
•
Town of Apex — Buffer Determination Letter
(919) 361 -5000
s
Appendix A — Supplemental Property Owner Information
+
Appendix B - Original Proposed Middleton Layout (02/2015)
Charlotte, NC
11301 Carmel Commons Blvd,
Suite 111
Charlotte North Carolina 28226
(704) 527 -0800
McAdamsCo.com Designing Tomorrow's Infrastructure & Communities

Ms. K. Higgins
Middleton
September 1, 2015
Page 2 of 10
PROJECT LOCATION /HABITAT: The subject property consists of an
assemblage of 9 on -site parcels totaling approximately 73- acres, and easement
acquisition within 6 off -site parcels to be utilized for off -site utility connections.
The subject property is approximately 73 -acres of large residential lots and
pasture land, with Holt Road bisecting the subject property. Approximately 60
percent of the subject property can be characterized as forested, mainly the
eastern and western portions, with a mix of loblolly pine (Pinus taeda), tulip
poplar (Liriodendron tulipifera), red maple (Acer rubrum), and oak species
(Quercus sp.), with an understory of blueberry (Vaccinium sp.), Chinese privet
(Ligustrum sinense), and greenbrier (Smilax sp.). The central areas currently
being utilized as cow and horse pasture grasslands. The pond in the
southwestern portion of the project area has been recently drained. The
surrounding properties are primarily rural residences and woodland, with a
school and some commercial areas to the south. Several new housing
developments appear to be under construction in the surrounding area.
JURISDICTIONAL FEATURES: The subject property lies within the Cape
Fear River Basin. Eastern portions of the subject property drain north and west
to White Oak Creek (HUC 03030002060150), while the rest of the property
drains west and south to Beaver Creek (HUC 03030002060160). Both White
Oak Creek and Beaver Creek are designated WS -V and NSW, and located
within the Jordan Lake watershed. The subject property is located within the
Town of Apex's secondary watershed protection overlay district.
A jurisdictional wetland /stream delineation was performed by McAdams
Company in the spring of 2015, and verified by Mr. James Lastinger (USACE
representative) on March 27 and May 12, 2015. The jurisdictional wetland areas
within the project area consists of three types, Bottomland Hardwood Forest,
Seep, and Headwater Wetland systems. Wetland areas A and B key out to be
Bottomland Hardwood Forest, with wetland B containing a small seep on the
western section, according to the NC Wetland Assessment Methodology
(NCWAM). Wetlands C -G key out to Headwater Wetland systems according
M[H -15000

Ms. K. Higgins
Middleton
September 1, 2015
Page 3 of 10
to NCWAM. There are 6 perennial stream features totaling 3,781 if and 5
intermittent stream features totaling 1,5771f within the project area (See Figure
4 — Stream Classification Table). All stream features were deemed important,
except stream feature J, which was deemed unimportant intermittent, by the
USAGE. In addition stream feature J was deemed intermittent on May 12, 2015,
by Mr. James Graham of the NC Division of Resources (DWR). Stream features
A -G are mapped on the USGS quadrangle and /or the Wake County Soils
Survey, therefore, are subject to the Town of Apex Riparian Buffer Ordinance
and Jordan Lake Riparian Buffer Rules. Stream features H -I are present in the
field, however are not depicted on the USGS quad or Soils Survey, therefore
are not subject to the Town of Apex or Jordan Lake Riparian Buffer Rules. The
stream features subject to the riparian buffer rules were verified by Mr. Mike
Deaton, on March I Oh and April 22, 2015, per the June 4, 2015 determination
letter (Apex 15 -006). The limits of the stream features and jurisdictional waters
have not changed since the original determinations. See Figures 1 -4, depicting
the jurisdictional stream features, wetlands, riparian buffers, and existing
conditions.
NOTE: Figures 4.0 -5.1 depict the surveyed limits of all jurisdictional waters
within project area.
PROPOSED IMPACTS: The purpose of the proposed project is provide
residential housing to the Town of Apex and western Wake County. The
proposed residential subdivision project known as Middleton, will be located on
73 -acres and consist of 111 single - family residential homes and 62 townhomes
to be constructed in several phases. The entire property will eventually be owned
and developed by MI Homes of Raleigh, LLC, until individual lots are platted
and sold to new home owners. As of the date of this application there are
currently, 10 different property owners, including on -site and off -site owners,
within the project area. Holt Road, which runs south to north, bisects the project
area to eastern and western portions. Both the eastern and western portion of the
Middleton project will be supported by on -site and off -site utilities, greenway
trail, recreational facilities, stormwater management, and roadway
improvements.
MIH -15000

Ms. K. Higgins
Middleton
September 1, 2015
Page 4 of 10
The entire site was designed to minimize impacts to aquatic resources while
utilizing the remaining parcel. Proposed perennial stream impacts associated with
the Middleton project have been reduced by 469 linear feet through two revisions
to the original roadway network and lot layout (Appendix B: Original Layout
enclosed). There are a total of 0.071 acre of jurisdictional wetland impact, 118
linear feet of temporary stream impact, 288 linear feet of permanent stream
impact, and spanning 47 linear feet for greenway construction. The Middleton
project is proposed as a medium - density subdivision, but all sedimentation and
erosion control measures will be implemented before construction to minimize
runoff. A network of stormwater management facilities will be strategically
placed throughout the site to treat and detain storm flows coming from the site.
Typical construction equipment to be utilized will be front end loaders, trackhoes,
graders, dump trucks, and bull dozers. Below is a description of stream and
wetland impacts (See Figure 5.0,5.1,5.2 & Insets 1 -13). Riparian buffer impact
maps are included with the 404/401 application, however will be reviewed and
approved through the Town of Apex.
Roadway Impacts (Insets 7 -9): In order to provide internal vehicular access for
residents and safety vehicles there is a network of roads and access points. As
stated previously, two road crossings were eliminated, one of which crossed
stream C, impacting 234 if of perennial stream. The second road crossing
eliminated proposed crossing stream G, which avoids 2351f of perennial stream
channel. In addition, an existing access road off of Holt Road is being utilized as
part of the main entrance to the western portion of the project, which will
minimize impacts to streams E and F. Although efforts have been made to avoid
impacts to jurisdictional waters, there are several permanent stream impacts
associated roadway impacts. There is one roadway stream impact in the
southwestern section of the project area, impacting 125 linear feet of unimportant
intermittent stream J (Fig. 5- Inset 6). There are three roadway impacts on the
eastern portion of the project. Utilizing the existing gravel access road, the
existing culverts at streams E and F are being replaced and properly sized to
accommodate the new road and meet the Town of Apex road - section design
M[H -15000

Ms. K. Higgins
Middleton
September 1, 2015
Page 5of10
standards. This will result in 82 linear feet of additional stream impact to stream
E (Inset 7) and 81 linear feet of additional impact to stream F (Inset 8).These new
culverts will be properly sized, a dissipater added to each, and be buried to allow
for aquatic life passage. In addition, wing walls were designed and added in
efforts to reduce the culvert lengths, and impacts to streams and riparian buffers
in this location. There is also one internal roadway impact on the western portion
which avoids stream G, but does result in 0.06 -acre of headwater wetland impact
to wetlands F and G (Inset 9). All of these proposed roadway impacts cross
between 75 and 105 degrees to the jurisdictional resource type.
Sewer/Water Line Impacts (Insets 2,4,5,10,13): There are two off -site sewer
and water lines proposed to be constructed to service the Middleton project. The
sewer, forcemain, and water line easement corridors have been combined where
practicable to reduce overall associated impacts. West: The western sewer and
water lines will parallel the riparian buffer zones of stream C, until it reaches
Twin Creek Rd., the water line then parallels Twin Oak Rd. until it ties in to an
existing Town of Apex water line, adjacent to stream section B. The sewer
continues to parallel stream C, until it ties into an existing Town of Apex sanitary
sewer manhole, adjacent to stream section A. There is one sewer /water line
impact area within the interior of the western portion of the project, which has
been placed into a combined easement totaling 40 linear feet of temporary impact
The western offsite sewer and water line were constrained by topography and
existing single - family residences to the west resulting in one forested wetland
impact of 0.011 acre (Inset 4) and one temporary stream impact of 31 linear feet
to stream C (Inset 2) at less than 90 degrees. The water line is proposed to be
installed at stream section B utilizing jack and bore construction underneath the
stream channel, which results in only riparian buffer impacts in this location and
avoids stream impacts. East Side: There is one combined sewer and forcemain
impact area on the eastern portion of the project resulting in 47 linear feet of
temporary stream impact to stream G, and will cross at a near 90- degree angle.
Greenway (Insetsl0 -11): There are three proposed greenway crossings
associated with the overall Middleton project. Each of the three stream crossings
MIH -15000

Ms. K. Higgins
Middleton
September 1, 2015
Page 6 of 10
will be spanned and constructed using steel span bridges for reinforced timber
construction methods, avoiding direct stream impacts to streams C, G, and H
(Insets 5, 10, 11). Each
of the three greenway crossings avoid impacts to
jurisdictional wetlands.
Typical construction equipment, such as a long -arm
track -hoe, front end loader, and bush hog will be used for the initial clearing.
TOTAL PROPOSED STREAM IMPACTS:
Newly Proposed
Impact Location
Impact Type
(linear feet)
Inset 2 (temp.)
Sewer 31
(Trench & Backfill)
Inset 5 (temp.)
Sewer & Water
40
(Trench & Backfill)
Inset 5 (span)
Greenway 17
(Span)
Inset 6 (perm.)
Roadway 125
Roadway
Inset 7 (perm.)
Culvert: 47 If 82
Dissipator: 35 If
Roadway
Inset 8 (perm.)
Culvert: 53 If 81
Dissipator: 28 If
Sewer
Inset 10 (temp.)
Force Main & Gravity 47
(Trench & Backfill)
Inset 10 (span)
Greenway 17
(Span)
Inset 11 (span)
Greenway 13
(Span)
TOTAL Total: 453 If
Temp: 118If / Perm :2881f / Spanning: 47 If
MIH -15000

Ms. K. Higgins
Middleton
September 1, 2015
Page 7of10
TOTAL PROPOSED WETLAND IMPACTS.
Impact Location Impact Type Wetland Type Area of Impact
(acres)
Sewer
(Trench & Backfill)
Inset 4 (perm.) Forested Seep 0.011 ac.
Conversion to
Herbaceous
Roadway
Headwater
Inset 9 (perm.) (Fill) Wetland 0.06 ac.
TOTAL 0.017 acre
AVOIDANCE and MINIMIZATION: Impacts to jurisdictional stream,
wetlands, and riparian buffers have been avoided and minimized to the
maximum extent practicable. The entire site was designed to minimize impacts
to aquatic resources while utilizing the remaining parcel. Proposed perennial
stream impacts associated with the Middleton project have been reduced by 469
linear feet through two revisions to the original roadway network and lot layout
(Appendix B: Original Layout enclosed). There are a total of 0.071 acre of
jurisdictional wetland impact, 118 linear feet of temporary stream impact, 288
linear feet of permanent stream impact, and spanning 47 linear feet for
greenway construction, which avoids 96% of the wetlands and 92% of the
streams within the project area. In addition, an existing access road off of Holt
Road is being utilized as part of the main entrance to the western portion of the
project, which will minimize impacts to streams E and F. Wing walls were also
designed and added in efforts to reduce the culvert lengths, and impacts to
streams and riparian buffers in this location. The roadway wetland impact on
the eastern portion was designed to utilize the upland portion between wetlands
F and G, in efforts to minimize wetland impacts in this area. All of these
proposed roadway impacts cross between 75 and 105 degrees to the
MIH -15000

Ms. K. Higgins
Middleton
September 1, 2015
Page 8of10
jurisdictional resource type. There are two off -site sewer and water lines
proposed to be constructed to service the Middleton project. The sewer,
forcemain, and water line easement corridors have been combined where
practicable to reduce overall associated impacts. The greenways will be
spanned with bridges instead of using traditional culverts and retaining walls
are incorporated throughout the site to avoid impacting jurisdictional wetlands,
streams, and riparian buffers.
MITIGATION: Compensatory mitigation for permanent stream impacts
associated with stream and wetland fill associated with the roadway crossings
is proposed at a 2:1 ratio, in the form of payment to the NC Division of
Mitigation Services (NCDMS) In- Lieu -Fee program. 200 SMUs and 0.04
WMUs have been requested per the NC Division of Mitigation Services
acceptance letter enclosed. If before construction begins WMU's become
available from a private mitigation bank, the permittee may purse this option.
The applicant also proposal additional mitigation in the form of avoidance and
minimization.
DIFFUSE FLOW: The proposed project is located within the Jordan Lake
watershed and will be subject to the Jordan Lake Riparian Buffer Rules.
Multiple stormwater management facilities with level spreaders are proposed
for use on this site. The proposed stormwater management facilities are
designed in accordance with the N.C. Stormwater Best Management Practices
manual (NCDENR).
STORMWATER MANAGEMENT: The proposed development is located
within the Cape Fear River basin with all stormwater runoff draining into
Beaver Creek and White Oak Creek, also located in the Jordan Lake watershed.
Per the Town of Apex regulations, stormwater management on this site shall
meet the stormwater management performance standards for development set
forth in the Town Unified Development Ordinance (UDO) sections 6.1.4
General and 6.1.7 High Density Development Option. To meet the above Town
MIH -15000

Ms. K. Higgins
Middleton
September 1, 2015
Page 9 of 10
of Apex standards, six stormwater management facilities, are proposed, five
stormwater wetlands and one 90% TSS removal wet ponds.
Peak Runoff Control Requirements: The proposed project will result in a
significant increase in peak flow rates. To mitigate this impact, the proposed
facilities have been designed such that post - development peak flow rates
resulting from on -site development are no greater than pre - development levels
in the 1- and 10 -year storm events.
Pollutant and Nutrient Control Requirements: The site is treated for water
quality per 6.1.7(A)(3) and 6.1.12 using structural water quality ponds and a
stormwater wetland to capture runoff from the developed areas of the site. The
ponds are designed to provide 90% TSS removal, and the wetland is designed
for 85% TSS removal. The stormwater management facilities meet the design
requirements of the Town of Apex and the North Carolina Division of Water
Resources Stormwater Best Management Practices manual.
A copy of the final stormwater management plan and approval letter from the
Town of Apex will be provided to NCDWR upon approval.
Consideration of this project is greatly appreciated. If you should have any
questions or require additional information, please do not hesitate to contact me
at (919) 287 -0895.
M[H -15000

Ms. K. Higgins
Middleton
September 1, 2015
Page 10 of 10
Sincerely,
McAdams Company
Kevin Yates
Senior Environmental Consultant
Project Manager
Enclosures
MIH -15000