20071778 Ver 1_More Info Received_20071212

Member
American Society of December 7, 2007
Landscape Architecu
American Institute of
Architects Mr. Alan Johnson
American Society of North Carolina Division of eater Quality
Civil Engineers 610 East Center Ave., SLllte 301
American Planning Mooresville, NC 28115
Institute
RE: Toby Creek Greenway 401 Permit
LA Project #05181
Dear Mr. Johnson:
LOSE
~ ASSOCIATES, INC.
LANDSCAPE ARCHITECTURE • ARCHITECTURE ENGINEERING • PLANNING
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This office has received a copy of your letter dated November 29, 2007 in
which you requested additional data required to process the 401 1~?ater Quality
Certification far the above referenced project.
Please find enclosed additional details of the culvert underpass at Tobv
Creek Raad. The grading and structural drawings have been included to
provide further information on the proposed construction methods to achieve
the crossing as desired by Mecklenburg CountSJ Parks and Recreation
Department. Gabion baskets will be utilized on the downstream side of the trail
ramping down to the underpass elevation to minimize dist~.~rbance and provide
for permanent stabilization. The uphill side of the ramps will be graded and re-
vegetated. An additional drawing has been prepared to show the linear footage
of stream impacts below the ordinary high water mark. The ordinary high water
mark is assumed to be at an elevation equal to 601.0 at Tob~% Creek Road. The
total stream impacts in this area are 191' of which 72' occurs ~nTithin the existing
stream culvert. Therefore the proposed impacts belo~~~ the ordinar~T high water
mark are 119'.94' of the 119' of stream impacts Till occur on a raised platform
with 1.5' diameter piers. The total square footage of stream impact within the
raised platform section is 28.3 ft`.
As part of the trail underpass, ~nre will be removing the accumulated silt
to within 1' of the existing culvert bottom and re-vegetating the banks per North
Carolina planting guidelines. Please refer to sheet C2.11 for specifics related to
the re-vegetation requirements. There is a significant accumulation of silt at the
existing box culvert and removing this debris ~nrill improve the functionality- of
the culvert and the remaining 1' of silt UTi11 provide an aquatic substrate.
A revised copy of page 8 of the application has been included for your
use. The Army Corps of Engineers issued the 404 permit on November 20, 2007
by Steve Chapin.
Corporate Office: 1314 5th Avenue North, Suite 200 • Nashville, Tennessee 37208 Phone [phone] • Fax [phone]
~-~~ Georgia Office: 220 ~' Crogan Street, Suite 100 • Lawrenceville, Georgia 30045 • Phone [phone] • Fax [phone]
._,_ -- __.,~-._.. w....~

LOSE
ASSOCIATES, INC.
LANDSCAPE ARCHITECTURE • ARCHITECTURE ENGINEERING • PLANNING
Member Please let me knov,T if you need. any additional inforrna~ion ~o pro`ess our
F'
~' Americar, Society of re~~TTnest for 401 certification.
'~?~ Landscape Architects 1
American Institute of
Architects
American Society of Sincerely'
Civil Engineers
American Planning LASE ~ SS~CIAT~S, Ii\IC•
Institute
Bren an Boles, PE, CFM
Project Manager
Enclosures
cc: Ms. Gwen Cook
?eTC UWQ Raleigh office
02061. / Calcs / CLOMR_jan_2007 / 0206? _c omr_additional_data.doc
Corporate Office: 1314 5th Avenue North, Suite 200 • Nashville, Tennessee 37208 Phone [phone] • Fax [phone]
Georgia Office: 220 VV Crogan Street. Suite 100 • Lawrenceville, Georgia 30045 • Phone [phone] • Fax [phone]
_ _ ._._r ~ . ._ ..... ,,..,,,~_k,,.- _ .. _._ _._ ....,r L. ,..._.. ~.. .

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 imna~tc rlnP t~ },r.rl, ~f,-,,,.~„_o „~., r~.... a._ _

Wetland Impact
Site Number

(indicate on map)

~'1
~'2 - ---- -

Type of Impact

Greenway Trail ~
Greenway Trail ~ v c.ulu 11VVLLlll~'.
~ Type of Wetland Located within
(e. forested, marsh 100-year
~~~
herbaceous, bog, etc.) Floodplain
(yes/no)
Forested ~ Yes i
Forested ~~ Yes
Distance to Area of
Nearest ~ Impact

S~-eam (acres)
(linear feet)
40 ~ 0.007
30 0.017 ~
i
i ~
~ I
i
i

i
i
Total Wetland Impact (acresl ! „ ,,,..
3. List the total acreage (estimated) of all existing wetlands on the property:2. l3
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.
Rtream Fmr,or~t I I

~ Number
i
Stream Name
~
Type of Impact i I
Perennial or Average
T,
Strea
V
dth Impact I Area of

(indicate on ma) ~
~ Intermittent? m
~ i
Before Impact Length
~ ~
j (line
f
d ~
Impact

S 1 ~
Toby Creek
Greenway Tratl
i Perennial
25' ar
ee
~ 119' ~ (acres)
0.030
S2 ~ Toby Creek Trib. ~ Trail Culvert ~ Perennial ~ 15' ~ 20 ~ 0.006
S; I Toby Creek Trib. Trail Culvert ~ Perennial 10' j 33 i 0.005
C4 ~ Toby Creek Trib. ~ Trail Culvert Perennial 15'
30 ~
0.009
SS
i Toby_ Creek Trib. ~ Trail Culvert ~ Intermittent 10' ~ 24
~
0.005 ~
i C
To
tal Stream Impact (by length and acrea~el

226
I
i 0 Os5
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. drainage, bulkheads. etc.
Open Water Impact ~ ~
Site Number ~ Name of Waterbody ~ Type of Waterbody ~ Area of ~
u Type of Impact (lake, o
(indicate on map) (r applicable) i p nd; estuary; sound, bay; I impact
ocean, etc.) ~ (acrPCl
Total Open ~,Tater Impact (acres) - 0
updated 1 i!l,'20C5
Page 8 of L

6. List the cumulative imn~rt m alt V.7arPr~ ~f the T' e ,- n„i~;,~.~ ~..._..,. ~t _
Stream Impact (acres): i 0.055
~I Wetland Impact (acres): 0.024
Open Water Impact (acres): 0
Total Impact to Waters of the U.S. (acres) 0.079
I Total Stream Impact (linear feet): ~ 226
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.
n/a
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., damiembankment, excavation; installatYOn of
draw-down valve or spillway; etc.): n~a
Proposed use or purpose of pond (e.g.; livestock watering, irrigation, aesthetic, trout pond,
Local stormwater requirement, etc.): n/a
Current land use in the vicinity of the pond: n/a
Size of watershed draining to pond: n~a Expected pond surface area: n!a
VII. Impact 3ustification (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, accessibilit~~, 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.
See Attachment
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Qualit<v 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.
lipdat:.~ 11'l,'20QS
Page 9 of 12

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LO/~~S__EAAA ~1_1~~ //~~ ~~ DECEMBER 7, 2007
o ek GrwllfyYE~'L1i mi h tiaN Yl~7~fi;A~~lEr~ieenng Rlcao Copier Aficio 1675.pc3, L~p nCq p~
~~A.NDSCA?E ARCHITECTURE •~ARiCH,ITc`CTU~`RE//i• ENGNE~,EIIR//NG 1. tttt UJ10