20072046 Ver 1_More Info Received_20080829

LMG
LAND MANAGEMENT GROUP INC.
Environmental Consultants
August 27, 2008
TO: Mr. Chad Coburn
NC Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405
RE: Additional Information for the Nationwide Permit 29 Application
Brunswick Forest Subdivision; Brunswick County, NC
DWQ# 07-2046
Dear Chad:
AUG 2 9 2008
DENR • WATER QUALITY
WETLANDS AND STORMWATER BRANCH
Thank you for your letter dated July 25, 2008 in which you request additional information for the 401 Water
Quality Certification application submitted for the Brunswick Forest Subdivision project. Below is a response to
each of your comments.
Since there are impacts to greater than 150 feet of perennial stream for this project, mitigation is required
for DWQ. The application states that the mitigation requirements will be met by paying into the NCEEP for
262 linear feet of stream. According to the PCN, approximately 777 linear feet of stream within the tract
will be preserved using restrictive covenants. In the attached document titled "Mitigation Property
Conservation Area", the words "in perpetuity" have been striked out of the document. This is a concern of
the DWQ since this is part of the mitigation plan for the project. Explain the reason for requesting the
removal or change the document to include the words "in perpetuity".
The applicant agrees to include the words "in perpetuity" in the preservation document and are working with the
Corps to finalize this language. Please note that a few minor changes have been made to the preservation map.
After the map was submitted in June of 2008, it was discovered that a small amount of preservation wetlands
were located within the golf course fairways. Because periodic pruning of vegetation will be needed in these
wetlands to maintain visibility to golfers who are playing across them, they were removed from the preservation
map. Therefore, the amount of wetlands to be preserved decreased slightly from 122.9 acres to 116.77 acres. In
addition, 10.36 acres of uplands and 777 linear feet of stream will be preserved. Enclosed is the revised
preservation map.
2. As mentioned in the previous "Request for additional information" letter from the DWQ on May 29, 2008,
several areas of possible non-compliance with the NC G010000 permit were noted during the site visit that
day pertaining to turbidity. Please provide a written narrative explaining how you intend to comply with this
permit and who will be delegated to inspect the site and maintain required rain gauge and monitoring
reports. Explain what measures are being taken to keep the site in compliance with the North Carolina
Turbidity Stream Standard.
As mentioned in our previous response to this comment, the applicant has obtained Erosion and Sedimentation
Control Permits for Phases 3 and 5 of development. Mr. Jeff Malpass with Malpass Engineering regularly
monitors discharge points and erosion control devices such as silt fences (once a week or after every '/Z inch of
rainfall; whichever is more frequent) to ensure they are functioning properly and that the site is compliant with
www.lmgroup.net • [e-mail] • Phone: [phone] • Fax: [phone]
3805 Wrightsville Ave., Suite 15, Wilmington, NC 28403 9 P.O. Box 2522, Wilmington, NC 28402
1
the above-mentioned permits. In addition, representatives of DLR have made routine visits on this site and have
found the site to be in compliance. We are not aware of any non-compliance citations regarding turbidity.
You stated in a recent phone call that the site is very large and may be difficult to monitor on a regular basis.
There is concern that some non-compliance issues could be overlooked without a systematic way to monitor the
site. In order to obtain all relevant details regarding erosion control efforts, we ask that you please contact Mr.
Malpass at [phone].
3. Please provide a copy of the USACE approved Jurisdictional Determination for this project when available.
Jennifer Frye of the Corps asked us to make a few minor revisions to the wetland survey. We are in the process
of performing these revisions and will provide her a final survey as soon as possible. Once she is able to sign the
survey, we will forward you a copy.
4. Please address the concerns of the NC Wildlife Resources Commission and the DWQ concerning golf ponds
already installed adjacent to jurisdictional wetlands on the site. Ponds installed on this project (amenity
ponds, golf ponds, storage ponds, etc) cannot violate 15A NCAC 02B. 0231 (b) which requires that:
(S) Hydrological conditions necessary to support the biological and physical characteristics naturally
present in wetlands shall be protected to prevent adverse impacts on: (a) Water currents, sedimentation, or
erosion problems & (fl the water levels or elevation.
Please see the attached letter from Craig Turner, a licensed soil scientist with LMG, regarding this issue.
I hope this response adequately addresses your concerns. Please contact me if you have any additional
questions. Thank you for your assistance with this project.
Sincerely,
Kim Williams
Wetland Scientist
Encl.
C: Mr. Jeff Earp, Funston Land and Timber, LLC
Mr. Greg Wayne, Hanover Design
Mr. Joe Taylor, Murchison, Taylor, and Gibson
Mr. Ian McMillan, DWQ
Ms. Kim Garvey, ACOE
Ms. Molly Ellwood, WRC
2
-4

f .F.C
4 1
j. 0111
< _ q
S p z<

?
- F £ 1 Rix

tic
A $
tli m _ € 3 k i,.
??
vv - =
c«
J

- ? N I Tn 2 1 "L'? {i
4C
I ? G
ti I z?? a

$x o?'??N S
2
[?,
$ v

o?

3

U

W

q O

U

0
w

W d ;

m ?
?
d
? ' '
=
o mr -a a o
? m„ 3
m
a y Y _ __

' Y vk °
^ ^
??
- nn nY U R? .
l
RS v
°F

_ I
sh
7
io g+
n ^ G "
0
0
0
Ml
l \IfI
? •FE J4 - ?:n ? R -Y R Nee x RxR ^m
t ? La <+ ?v ye ?r:R ?i? ?+ YR;YR:,R;?na^^9RZnRRgiYo . S=°.erm
" a 3t R R^R°Y+?:i^ :YYRnR?aAR
O'&* O Q lice g
OdO ® e ?? a
0 os,
" r+ ' g ;^a Waza;^aa qry„,Ro ,c•,
O
oYp °$RA°.."
OOH ?5_seeaaoaaaao_ o_^e alnn
00 O L
ce obNJ oiy? O ® " on L°' m9, N Lw U
oN ? ? ry 's ?, ?m r,?
?? Ln
U 9 _ -- _ - co
co
?/ - SUNNY POINT RAILROAD
3
WM
- _?I = B
Pq
•50'F\W
C6
q O
o U
4 v
? o W / \
Oz F
a
a N a=z °mQ
R I-UO zoi Z / \
p Q ? ? WYQ 4'a? \
in
N
O
LL
co
i
? O OOO.
O OOOO®0®???000
Q R 0 a
s O o?0 ^ 0000?DO®00
a
Q) Q <1
a) T
O O © ©® ® © s RnRBe
O O ® ® ® ® ® 4 .a r Rx
© 4 © a 4 _ _ Y e o. A,
0 `,0 ©a?4a4a oo®®o, o®ooooo®oooo Oooo
O 0000®®®0®0°° o®oo
000, ?? o
0
o, o 00®000 0
0 00'0 0 0 0
®o p0:..0®
? O
(rg oyNJ ?N9 J
N
U ?-
w
v j
q O
w
U
? o
z
o z
? o
a
w `? 1 O
4
D Q
3 ? O
z
w
CL
0
J
W
W
W
LL
r4O
O
00] ?
O jOZ
L Wxe a?
W u? z?
2? z a
,.80 088_=_____ _
ea4aa z
rr > 0
?u nz >
LLJ
0
I_ _ f

o
o ? w

t; =
o
- w
? Z
^I Q
V a
°
_h z
J
C

° ?"1N^ L
? Q°
m
O
V O dOMr?
o
W QZO?
O
Oz?m m

? 'fox
a
nY
J
0 ® O O
Q O
C, 4 -
(r
-NNY PaNr RAILROAD _
? - ass :sR
<?mc??rsa -mfr
?,gamam -
o
w Q
WW
= D'
Un Q
W tY
Wo
Un
z
w
0
w
W
0
W
(Y
r.

O

=\ ------------------------------
gib
(L ? ?7997J"J%^
San'°._,°a°lo
a^
? RRR
<Yo'?o?°ir n?
.xT
u5?<Si
? nxry rs?pn _°9:
W (Fa
M ObNJ ??J
1? Jiy

q O
w
o U
a
¢ o
zOZ

?e

LL-

K
d
om°m
to
oo? i
W
3 G O?
^1 rye
w (_ °m? o k
°
?:oe?mR„ssas?; e?
om-'nrda??^ air
??:'_::' ?ERr^xo
a
a ?
w
WZ
U?
z v
?p
rrte?.,, pOy
v, W YNj ICI
r?Z¢
r?r^ W QZ00
vJ OZPm ?
j ^?4 3
2
?W
O?
?W
oZ
hm
a
Wry
2?'0 h

o
0
? p
0
a
O
'q ?8a4s os
S tP•-
,d
?, a

This report summarizes the impacts that the proposed sediment basins in Phases 3 and 5 of
Brunswick Forest have on the nearby wetlands. My comments are based upon the design
sheets provided by Hanover Design Services for each structure. Site-specific soils data has
been collected and augmented by data collected and used in previous evaluations.
For each sediment basin within Phases 3 and 5, the following table lists the closest distance to
the wetland, the permanent pool (PP) elevation, and the elevation of the wetland ground
surface.
Brunswick Forest Sediment Basin Pond Projected Impact on Groundwater

Golf

Course

S-

BASIN Closest
Distance

to
wetlands
(ft) PP

Elev.

(msl)
(ft) 404

Elevation

(msl)
(ft)

eason No Corrective Measure Needed
C 1 C-1 14.0 15.0 15.8 Vertical separation at or less than 2 feet
1 C-2 345 22 19.9 Wetland elevation at or below PP elevation
2C-1 23.7 23.0 25.0 Vertical separation at or less than 2 feet
2C-2 10.0 23.0 25.0 Vertical separation at or less than 2 feet
2C-3 56.7 21.0 21.0 Wetland elevation at or below PP elevation

2C-4
290.0
22.0
24.5 Vertical separation slightly greater than 2
feet, but distance to wetland is great.

4C
386.0
20.5 Vertical separation slightly greater than 2
feet, but distance to wetland is great.

5C-1
68.2
20.0
22.0 Vertical separation at or less than 2 feet;
distance to wetland greater than 50 feet
7C 114.4 11.0 10.0 Wetland elevation at or below PP elevation
8C-1 37.9 11.0 13.0 Vertical separation at or less than 2 feet
8C-2 >300 18.0 18.0 Wetland elevation at or below PP elevation
9C 41.1 16.0 15.3 Wetland elevation at or below PP elevation

M
1 M
62.8
15.0
15.2 Vertical separation less than 2 feet;
distance to wetland greater than 50 feet

2M-1
242.7
22.0
24.8 Vertical separation slightly greater than 2
feet, but distance to wetland is great.

2M-2
358.8
22.1
25.0 Vertical separation slightly greater than 2
feet, but distance to wetland is great.

3M-1
372.2
21.7
24.3 Vertical separation slightly greater than 2
feet, but distance to wetland is great.
3M-2 38.1 21.0 23.0 Vertical separation at or less than 2 feet
4M 87.0 21.5 23.5 Vertical separation at or less than 2 feet
5M-1 71.4 26.5 28.4 Vertical separation at or less than 2 feet
5M-2 39.4 26.5 28.5 Vertical separation at or less than 2 feet
6M 51.8 26.5 28.0 Vertical separation at or less than 2 feet
8M-1 82.5 23.0 25.0 Vertical separation at or less than 2 feet
8M-2 647.8 23.0 17.5 Wetland elevation at or below PP elevation

Based on these data, it was determined that each of these basins would not negatively affect
wetlands. For strongly sloping sites, wetlands at or below the PP elevation will not be impacted
by'the sediment basin. All other basins within these phases either have a PP elevation that is
within two feet of the nearest wetland elevation or are too far away from the wetland to have a
drainage effect.
Soil borings taken at each site evaluated certain morphological properties and estimated
permeability as described in Standard Methods of Soil Analysis, Part 1, 1972 and Field Guide
for Describing and Sampling Soil, 1998. Soil profile data for each boring is not included in this
report.
No proposed corrective measures are required to minimize lateral water flow into the proposed
sediment basin structure. Please feel free to contact me if you have questions or comments
about this information
Respectfully,

G. Craig Turner
Vice President
Land Management Group, Inc.NC
Licensed Soil Scientist # 1091
SC Certified Soil Scientist # 57
August 27, 2008
www-1mgroup.net • info(ulmgroup.net • Phone: [phone] • Fax: [phone]
3805 Wrightsville Ave., Suite 15, Wilmington, NC 28403 • P.O. Box 2522, Wilmington, NC 28402
S.C Certification
Number 57