20110667 Ver 1_Application_20120112

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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
BEVERLY EAVES PERDUE
GOVERNOR
January 11 2012
NC Division of Water Quality
1650 Mail Service Center
Raleigh, NC 27699 1650
ATTN Mr Brian Wrenn
NCDWQ Coordinator
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EUGENE A CONTI JR
SECRETARY
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Subject Request for Modification of the Section 401 Water Quality Certification
for the proposed replacement of Bridge No 148 over Lamance Creek on SR
1326 in Transylvania County Federal Aid Project No BRZ 1326(3)
Division 14, TIP No B 4989 Debit $240 00, WBS 40461 1 1
Reference Permit Application dated June 30 2011
Section 401 Permit No 20110667 issued August 5, 2011
Dear Sir
This 401 permit modification request is to update the permanent impacts to Lamance Creek
and include the avoidance minimization measures that will be required for this project The
previous permit application and subsequent 401 permit listed the impacts incorrectly as 33
linear feet of impacts from the culvert and 17 feet of impact from bank stabilization The
corrected impacts are 53 linear feet for the culvert placement and 20 linear feet for bank
stabilization
Please see attached, the revised PCN Letter to the USACE Addendum to the June 30 2011
Application, the EEP Acceptance letter the revised permit drawings and the email to Mike
Parker, DWQ, clarifying the revisions
MAILING ADDRESS
NC DEPARTMENT OF TRANSPORTATION
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS
1598 MAIL SERVICE CENTER
RALEIGH NC 27699 1598
TELEPHONE [phone]
FAX [phone]
WEBSITE WWW NCDOT ORG
LOCATION
1020 BIRCH RIDGE DRIVE
RALEIGH NC 27610 4328

A copy of this modified permit application will be posted on the NCDOT website at
http / /www ncdot org /doh/preconstruct/pe /neu/permit html If you have any questions or
need additional information please e mail Jeff Hemphill at jhemphill @ncdot gov
Cc Lon Beckwith USACE
Mike Parker NCDWQ
Sincerely
G�
Gregory J Thorpe, PhD Manager
Project Development & Environmental Analysis Unit
2

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1 I To
Office Use Only
Corps action ID no
DWQ project no
Form Version 1 3 Dec 10 2008
Pre - Construction Notification (PCN) Form
A
Applicant Information
1
Processing
la
Type(s) of approval sought from the
Corps
®Section 404 Permit ❑Section 10 Permit
lb
Specify Nationwide Permit (NWP) number or General Permit (GP) number 198200031
1c
Has the NWP or GP number been verified by the Corps?
❑ Yes
® No
1 d
Type(s) of approval sought from the DWQ (check all that apply)
® 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
1 e
Is this notification solely for the record
because written approval is not required?
For the record only for DWQ 401
Certification
❑ Yes ® No
For the record only for Corps Permit
❑ Yes ® No
1f
Is payment into a mitigation bank or in lieu fee program proposed for mitigation
of impacts? If so attach the acceptance letter from mitigation bank or in lieu
fee program
® Yes
❑ No
1g
Is the project located in any of NC s twenty coastal counties If yes answer 1 h
below
❑ Yes
® No
1 h
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes
® No
2
Project Information
2a
Name of project
Replacement of Bridge 148 over Lamance Creek on SR 1326
2b
County
Transylvania
2c
Nearest municipality / town
Balsam Grove
2d
Subdivision name
not applicable
2e
NCDOT only T I P or state
project no
B 4989
3
Owner Information
3a
Name(s) on Recorded Deed
North Carolina Department of Transportation
3b
Deed Book and Page No
not applicable
3c
Responsible Party (for LLC if
applicable)
not applicable
3d
Street address
1598 Mail Service Center
3e
City state zip
Raleigh NC 27699 1598
3f
Telephone no
(919) 707 61
3g
Fax no
[phone]
3h
Email address
jhemphill @ncdot gov

4 Applicant Information (if different from owner)
4a Applicant is
❑ Agent ❑ Other specify
4b Name
not applicable
4c Business name
(if applicable)
4d Street address
4e City state zip
4f Telephone no
4g Fax no
4h Email address
5 Agent/Consultant Information (if applicable)
5a Name
not applicable
5b Business name
(if applicable)
5c Street address
5d City state zip
5e Telephone no
5f Fax no
5g Email address

B Project Information and Prior Project History
1 Property Identification
la Property identification no (tax PIN or parcel ID)
not applicable
1 b Site coordinates (in decimal degrees)
Latitude 35 2056 Longitude 82 8856
(DD DDDDDD) ( DD DDDDDD)
1c Property size
26 acres
2 Surface Waters
2a Name of nearest body of water (stream river etc ) to
North Fork French Broad River
proposed project
2b Water Quality Classification of nearest receiving water
B Tr
2c River basin
French Broad
3 Project Description
3a Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application
Rural residential forested
3b List the total estimated acreage of all existing wetlands on the property
047
3c List the total estimated linear feet of all existing streams (intermittent and perennial) on the property
203
3d Explain the purpose of the proposed project
To replace a structurally deficient (and/ or) functionally obsolete bridge
3e Describe the overall project in detail including the type of equipment to be used
The project involves replacing a 20 5 foot bridge with a 48 foot 12 x 6 foot reinforced concrete box culvert (RCBC) on the
existing alignment with an off site detour Standard road budding equipment such as trucks dozers and cranes will be
used
4 Jurisdictional Determinations
4a Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
® Yes E] No El Unknown
project (including all prior phases) in the past
Comments Yes
4b If the Corps made the jurisdictional determination what type
El Preliminary CE Final
of determination was made?
4c If yes who delineated the jurisdictional areas?
Agency /Consultant Company NCDOT
Name (if known) Jeff Hemphill
Other
4d If yes list the dates of the Corps jurisdictional determinations or State determinations and attach documentation
August 26 2008
5 Project History
5a Have permits or certifications been requested or obtained for
® Yes ❑ No ❑ Unknown
this project (including all prior phases) in the past?
5b If yes explain in detail according to help file instructions
A 401 was issued 8/5/2011 This new request for modification is for a correction and update of total permanent impacts
6 Future Project Plans
6a Is this a phased project?
❑ Yes ® No
6b If yes explain

C Proposed Impacts Inventory
1 Impacts Summary
la Which sections were completed below for your project (check all that apply)
® Wetlands ® Streams tributaries ❑ Buffers
❑ Open Waters ❑ Pond Construction
2 Wetland Impacts
If there are wetland impacts proposed on the site then complete this question for each wetland area impacted
2a
2b
2c
2d
2e
2f
Wetland impact
Type of jurisdiction
number —
Type of impact
Type of wetland
Forested
(Corps 404 10
Area of impact
Permanent (P) or
(if known)
DWQ — non 404 other)
(acres)
Temporary T
Site 1 ® P ❑ T
Fill
Bog forest
® Yes
❑ No
® Corps
❑ DWQ
<0 01
Site 2 ®P ❑ T
Mechanized
clearing
Bog Forest
El Yes
❑ No
® Corps
❑ DWQ
<0 01
Site 3 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
Site 4 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
Site 5 ❑ P ❑ T
❑ Yes
❑ No
❑ Corps
❑ DWQ
Site 6 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
<0 01
2g Total wetland impacts
Permanent
0 Temporary
2h Comments
3 Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site then complete this
question for all stream sites impacted
3a
3b
3c
3d
3e
3f
3g
Stream impact
Type of impact
Stream name
Perennial
Type of
Average
Impact length
number
(PER) or
jurisdiction
stream
(linear feet)
Permanent (P) or
intermittent
(Corps 404 10
width
Temporary (T)
(INT)?
DWQ — non 404
(feet)
other)
Site 1 ® P ❑ T
RCBC
Lamance Creek
® PER
[:11 NT
® Corps
❑ DWQ
10
53
Site 2 ® P ❑ T
Bank
Stabilization
Lamance Creek
® PER
❑ INT
® Corps
❑ DWQ
10
20
Site 3 ❑ P ® T
Dewatering
Lamance Creek
® PER
❑ INT
® Corps
❑ DWQ
10
55
❑ PER
❑ Corps
Site 4 ❑ P ❑ T
❑ INT
❑ DWQ
❑ PER
❑ Corps
Site 5 ❑ P ❑ T
❑ INT
❑ DWQ
Site 6 ❑ P ❑ T
❑ PER
❑ INT
❑ Corps
❑ DWQ
3h Total stream and tributary impacts
73 Perm
55 Temp
31 Comments

4 Open Water Impacts
If there are proposed impacts to lakes ponds estuaries tributaries sounds the Atlantic Ocean or any other open water of
the U S then indivi ually list all open water impacts below
4a
4b
4c
4d
4e
Open water
Name of
impact number —
waterbody
Type of impact
Waterbody type
Area of impact (acres)
Permanent (P) or
(if applicable)
Temporary T
01 ❑ PEI T
02 ❑P ❑T
03 ❑P ❑T
04 ❑P ❑T
4f Total open water impacts
X Permanent
X Temporary
4g Comments
5 Pond or Lake Construction
If pond or lake construction proposed then complete the chart below
5a
5b
5c
5d
5e
Wetland Impacts (acres)
Stream Impacts (feet)
Upland
Pond ID
Proposed use or
(acres)
number
purpose of pond
Excavat
Flooded
Filled
ed
Flooded
Filled
Excavated
Flooded
P1
P2
5f Total
5g Comments
5h Is a dam high hazard permit required
❑ Yes ❑ No If yes permit ID no
51 Expected pond surface area (acres)
5j Size of pond watershed (acres)
5k Method of construction

6 Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer then complete the chart below If yes then individually list all buffer
impacts below If any impacts require mitigation
then you MUST fill out Section D of this form
6a
❑ Neuse
El Tar Pamlico El Other
Project is in which protected basin'?
❑ Catawba
❑ Randleman
6b
6c
6d
6e
6f
6g
Buffer impact
number —
Reason for impact
Buffer
Zone 1 impact
Zone 2 impact
Permanent (P) or
Stream name
mitigation
(square feet)
(square feet)
Temporary T
required?
131 ❑P ❑T
❑Yes
❑ No
B2 ❑P ❑T
El Yes
❑ No
B3 ❑P ❑T
El Yes
❑ No
6h Total buffer impacts
61 Comments

D
Impact Justification and Mitigation
1
Avoidance and Minimization
la
Specifically describe measures taken to avoid or minimize the proposed impacts in designing project
An off site detour will be utilized thus reducing onsite impacts
1 b
Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques
Grass shoulders and grass ditches will be used throughout the project to treat stormwater before entering the stream and
Class I rip rap wll be used at the proposed culvert outlet to minimize erosion to the stream banks The North Carolina
Wildlife Resource Commission (WRC) issued a Trout Moratorium on February 11 2008 for in stream construction
covering the trout spawning period from October 15 to April 15 The North Carolina Division of Water Quality (NCDWQ)
has designated Lamance Creek as trout waters therefore Design Standards in Sensitive Watersheds will be
implemented for this project
2
Compensatory Mitigation for Impacts to Waters of the U S or Waters of the State
2a
Does the project require Compensatory Mitigation for
impacts to Waters of the U S or Waters of the State
® Yes ❑ No
If no explain
2b
If yes mitigation is required by (check all that apply)
❑ DWQ ® Corps
2c
If yes which mitigation option will be used for this
project?
❑ Mitigation bank
®Payment to in lieu fee program
❑ Permittee Responsible Mitigation
3
Complete if Using a Mitigation Bank
3a
Name of Mitigation Bank not applicable
3b
Credits Purchased (attach receipt and letter)
Type
Quantity
3c Comments
4
Complete if Making a Payment to In lieu Fee Program
4a Approval letter from in lieu fee program is attached
® Yes
4b
Stream mitigation requested
53 feet (see attached letter) linear feet
4c
If using stream mitigation stream temperature
❑ warm ® cool ❑cold
4d
Buffer mitigation requested (DWQ only)
square feet
4e
Riparian wetland mitigation requested
acres
4f
Non riparian wetland mitigation requested
acres
4g
Coastal (tidal) wetland mitigation requested
acres
4h
Comments
5
Complete if Using a Permittee Responsible Mitigation Plan
5a
If using a permittee responsible mitigation plan provide a description of the proposed mitigation plan

6 Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation?
❑ Yes ® No
6b If yes then identify the square feet of impact to each zone of the riparian buffer that requires mitigation Calculate the
amount of mitigation required
Zone
6c
Reason for impact
6d
Total impact
(square feet)
Multiplier
6e
Required mitigation
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1 5
6f Total buffer mitigation required
6g If buffer mitigation is required discuss what type of mitigation is proposed (e g payment to private mitigation bank
permittee responsible riparian buffer restoration payment into an approved in lieu fee fund)
6h Comments

E
Stormwater Management and Diffuse Flow Plan (required by DWQ)
1
Diffuse Flow Plan
1 a
Does the project include or is it adjacent to protected riparian buffers identified
❑ Yes ® No
within one of the NC Riparian Buffer Protection Rules?
1 b
If yes then is a diffuse flow plan included? If no explain why
Comments if yes see attached permit drawings
❑ Yes ❑ No
2
Stormwater Management Plan
2a
What is the overall percent imperviousness of this project?
N/A
2b
Does this project require a Stormwater Management Plan?
® Yes ❑ No
2c
If this project DOES NOT require a Stormwater Management Plan explain why
2d
If this project DOES require a Stormwater Management Plan then provide a brief narrative description of the plan
See attached permit drawings
❑ Certified Local Government
2e
Who will be responsible for the review of the Stormwater Management Plan?
❑ DWQ Stormwater Program
® DWQ 401 Unit
3
Certified Local Government Stormwater Review
3a
In which local governments jurisdiction is this project*?
not applicable
❑ Phase II
3b
Which of the following locally implemented stormwater management programs
❑ NSW
❑ USMP
apply (check all that apply)
❑ Water Supply Watershed
❑ Other
3c
Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑ No
attached?
4
DWQ Stormwater Program Review
❑ Coastal counties
4a
Which of the following state implemented stormwater management programs apply
❑ HQW
(check all that apply)
❑ ORW
❑ Session Law 2006 246
❑ Other
4b
Has the approved Stormwater Management Plan with proof of approval been
attached?
❑ Yes ❑ No
5
DWQ 401 Unit Stormwater Review
5a
Does the Stormwater Management Plan meet the appropriate requirements?
❑ Yes ❑ No N/A
5b
Have all of the 401 Unit submittal requirements been met?
❑ Yes ❑ No N/A

F Supplementary Information
1 Environmental Documentation (DWQ Requirement)
la Does the project involve an expenditure of public (federal /state /local) funds or the
® Yes ❑ No
use of public (federal /state) land?
lb If you answered yes to the above does the project require preparation of an
environmental document pursuant to the requirements of the National or State
® Yes ❑ No
(North Carolina) Environmental Policy Act (NEPA /SEPA)?
1 c If you answered yes to the above has the document review been finalized by the
State Clearing House? (If so attach a copy of the NEPA or SEPA final approval
®Yes ❑ No
letter )
Comments
2 Violations (DWQ Requirement)
2a Is the site in violation of DWQ Wetland Rules (15A NCAC 2H 0500) Isolated
Wetland Rules (15A NCAC 2H 1300) DWQ Surface Water or Wetland Standards
❑ Yes ® No
or Riparian Buffer Rules (15A NCAC 213 0200)?
2b Is this an after the fact permit application?
❑ Yes ® No
2c If you answered yes to one or both of the above questions provide an explanation of the violation(s)
3 Cumulative Impacts (DWQ Requirement)
3a Will this project (based on past and reasonably anticipated future impacts) result in
❑ Yes
additional development which could impact nearby downstream water quality?
❑ No
3b If you answered yes to the above submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy If you answered no provide a short narrative description
Due to the minimal transportation impact resulting from this bridge replacement this project will neither influence nearby
land uses nor stimulate growth Therefore a detailed indirect or cumulative effects study will not be necessary
4 Sewage Disposal (DWQ Requirement)
4a 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
not applicable
10

5
Endangered Species and Designated Critical Habitat (Corps Requirement)
5a
WIII this project occur in or near an area with federally protected species or
® Yes ❑ No
habitat?
5b
Have you checked with the USFWS concerning Endangered Species Act
❑ Yes ® No
impacts?
❑ Raleigh
5c
If yes indicate the USFWS Field Office you have contacted
❑ Asheville
5d
What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
NCDOT field surveys Virginia spiraea Mountain sweet pitcher plant & Swamp pink 6/24/09 Small whorled pogonla
and Mountain sweet pitcher plant 8/14/07 and the North Carolina Natural Heritage database determined No Effect
6
Essential Fish Habitat (Corps Requirement)
6a Will this project occur in or near an area designated as essential fish habitats
❑ Yes ® No
6b
What data sources did you use to determine whether your site would impact Essential Fish Habitat?
NMFS County Index
7
Historic or Prehistoric Cultural Resources (Corps Requirement)
7a
WIII this project occur in or near an area that the state federal or tribal
governments have designated as having historic or cultural preservation
❑ Yes ® No
status (e g National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b
What data sources did you use to determine whether your site would impact historic or archeological resources?
NEPA Documentation
8
Flood Zone Designation (Corps Requirement)
8a WIII this project occur in a FEMA designated 100 year floodplain?
® Yes ❑ No
8b
If yes explain how project meets FEMA requirements NCDOT Hydraulics Unit coordination with FEMA
8c What source(s) did you use to make the floodplain determination? FEMA Maps
I ' I 17,
Dr Gregory J Thorpe, PhD
Date
Applicant/Agent s Printed Name
A Signature
(Agents signature is valid only if an authorization letter from the applicant
is provided
11

�� -Art4
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
BEVERLY EAVES PERDUE
GOVERNOR
November 8 2011
U S Army Corps of Engineers
Regulatory Field Office
151 Patton Avenue Room 208
Asheville NC 28801 5006
ATTN Ms Lon Beckwith
NCDOT Coordinator
EUGENE A CONTI JR
SECRETARY
Subject Addendum to the Application for Section 404 Regional General Permit
198200031 and Section 401 Water Quality Certification for the proposed
replacement of Bridge No 148 over Lamance Creek on SR 1326 in
Transylvania County Federal Aid Project No BRZ 1326(3) Division 14
TIP No B 4989
Dear Madam
This addendum provides supplemental information to the Section 404 Application submitted
July 13, 2011 The following Bridge to Culvert Avoidance & Minimization and Hydraulic
Design Criteria has been submitted by the NCDOT Hydraulics Unit
Bridge to Culvert Avoidance and Minimization for B -4989 Transylvania County
Proposed Structure Summary
Drainage Area 430 acres
DWQ Stream Classification C Tr
Culvert Size and Type 12 x 6 Reinforced Concrete Box Culvert
Culvert Length 53
Minimization Efforts The proposed culvert will be buried 1 ft with alternating 8 ft wade by
0 5 ft high low flow sills for fish passage The culvert maintains the existing stream slope
low flow channel dimensions low flow velocities and provides a smooth transition from
upstream to downstream with no sharp bends at the inlet or outlet
MAILING ADDRESS
NC DEPARTMENT OF TRANSPORTATION
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS
1598 MAIL SERVICE CENTER
RALEIGH NC 27699 1598
TELEPHONE [phone]
FAX [phone]
WEBSITE WWW NCDOT ORG
LOCATION
1020 BIRCH RIDGE DRIVE
RALEIGH NC 27610 -4328

Stream Slope
Existing average stream slope = 0 4%
Proposed culvert slope =0 38%
Fish and /or Aquatic life Passage
Existing low flow channel dimensions in the stream The existing low flow channel width up
and downstream of the culvert is approximately 8 ft with an average depth of 0 5 ft
Proposed low flow dimensions through the culvert culvert will have alternating low flow
sills to facilitate fish passage The low flow sills will provide an 8 ft wide by 0 S ft deep low
flow channel in the culvert
Existing low flow velocities in the stream existing low flow velocity = 1 4 ft /sec
Proposed low flow velocities through the culvert proposed low flow velocity through
culvert = 15 ft /sec
Alternating low flow sills and /or baffles culvert will have alternating low flow sills to
facilitate fish passage since the proposed total culvert width is larger than the existing low
flow channel width
Culvert Burial
Existing streambed material cobbles gravel and sand
Proposed culvert bunal-I foot
Proposed sills and or baffles Alternating low flow sills will be used The low flow sills will
be spaced approximately 26 ft apart and will provide an 8 ft wide by 0 5 ft deep low flow
channel in the culvert Culvert slope of 0 38% does not necessitate the use of baffles to hold
bed material but they are being used to provide low flow channel through culvert
Culvert/Stream Alignment
Stream patterns upstream and downstream of the culvert that could affect fish passage and
bank stability The stream channel is relatively straight through the reach of the stream
where the culvert will be placed with a very slight bend at downstream culvert outlet The
stream slope is also constant through the reach of the stream up and downstream of where
the culvert will be placed
Bed forms impacted by culvert (riffles pools glides etc) There is a glade located dust
upstream of the bridge that transitions through the bridge to a raffle section downstream of
the bridge The culvert will be placed in this glade raffle section
Establishment of a low flow floodplain bench low flow floodplain bench not required since
culvert width fats within the stream channel up and downstream
Culvert alignment with stream culvert provides a smooth transition from the upstream to
downstream with no sharp bends at entrance and outlet
Stream realignment necessary no
Sharp bends at entrance and outlet -no
Bank stabilization Class I rap rap on banks only for 20 ft downstream
Outlet Velocities
Natural stream channel 2yr velocity 3 8 ft /sec
Proposed Culvert 2yr outlet velocity 2 4 ft /sec
Natural stream channel l Oyr velocity 4 4 ft /sec
Proposed Culvert l0yr outlet velocity 4 3 ft /sec
2

Roadway Geometric Considerations
Evaluate /describe roadway geometric constraints N/A
Hydraulic Design Criteria
The design criteria for this road would be 25 year (secondary road) The pre and post
construction outlet velocities for the 25yr stone are as follows
Natural stream channel 25yr velocity--4 6ft/sec
Proposed culvert 25yr outlet velocity--5 3ft /sec
We provided the 2yr velocity for comparison since it is close to what would be considered
the bankfull flow The 10yr velocity was also provided because this discharge is used to
evaluate the need for outlet channel protection and or energy dissipation
Analysis Process
The overall hydrologic analysis for a project begins with review and extrapolation of
pertinent information from data sources identified during the pre design study Final
determination of sources of watershed areas and base mapping for drainage area
delineation are also made at this time Primary resources for this information are
• U S G S and T V A quadrangle mapping
• U S G S open file report 83 211 "Drainage Areas of Selected Sates on Streams an
North Carolina"
• Photogrammetnc contour mapping
• Aerial photography
• Special studies (Corps TVA FEMA)
• Field reconnaissance (This is required for most non rivenne drainage areas in the
coastal plain as well as any small watersheds in other areas )
The selection of a "design discharge" for a drainage feature is a risk based assessment
process involving the evaluation of a range of flood magnitudes for such factors as potential
damages costs traffic service environmental impact and flood plain management criteria
to determine an appropriate and acceptable structure for each site One specific criterion on
which the design is evaluated and generally referred to as the "design discharge" is the flood
level and frequency which results in inundation of the travelway Table 4 3 relates desirable
minimum levels of protection from travelway inundation to roadway classification Variation
from these minimum design levels must be justified through the assessment process and
appropriately documented When roadway overtopping is not involved the "design
discharge" will be the level of flood used for establishing freeboard and /or backwater
limitations
TABLE 4 -3
ROADWAY CLASSIFICATION FREQUENCY
Interstate (I) 150 year
Primary (US & NC) 150 year
,Secondary (Mayor City thoroughfare) —150 year
Secondary 25 year
The hydrologic analysis process for a specific drainage feature is accomplished as an integral
part of the hydraulic sizing and perfonnance analysis Specific discharge criteria and
3

computational needs are addressed in further sections of this guideline for each particular
drainage feature Documentation of the hydrologic data is included with the hydraulic
design
A copy of this permit application addendum will be posted on the NCDOT website at
http //www ncdot org /doh/preconstruct/pe /neu/permit html If you have any questions or
need additional information please e mail Jeff Hemphill at jemphill @ncdot gov
Cc David Chang
File
Srnc
E,7,
Gregory J Thorpe PhD
Branch Manager
Project Development & Environmental Analysis Unit
11

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Jl.%wlll
men
PROGRAM
December 20 2011
Mr Gregory J Thorpe PhD
Manager Project Development and Environmental Analysts Branch
North Carolina Department of Transportation
1548 Mail Service Center
Raleigh North Carolina 27699 1548
Dear Dr Thorpe
Subject EEP Mitigation Acceptance Letter
B 4989, Replace Bridge Number 148 over Lamance Creek on SR 1326 Transylvania
County
The purpose of this letter is to notify you that the Ecosystem Enhancement Program (EEP) will provide the
compensatory stream mitigation for the subject project Based on the information supplied by you on December 19
2011 the impacts are located in CU 06010105 of the French Broad River Basin in the Southern Mountains (SM)
Eco Region and are as follows
French Broad
Stream
Wetlands
Buffer (Sq Ft )
06010105
Cold
Cool
Warm
Riparian
Non
Coastal
Zone I
Zone 2
SM
Riparian
Marsh
Impacts
53
0
0
0
0
0
0
0
(feet/acres)
This mitigation acceptance letter replaces the mitigation acceptance letter issued on June 24 2011
EEP commits to implementing sufficient compensatory stream mitigation credits to offset the impacts associated
with this project as determined by the regulatory agencies in accordance with the N C Department of Environment
and Natural Resources Ecosystem Enhancement Program In Lieu Fee Instrument dated July 28 2010 If the above
referenced impact amounts are revised then this mitigation acceptance letter will no longer be valid and a new
mitigation acceptance letter will be required from EEP
1929
If you have any questions or need additional information please contact Ms Beth Harmon at 919 715
Sincerely
4-k-
Micha llison
EEP Deputy Director
cc Mr Lori Beckwith USACE — Asheville Regulatory Field Office
Mr Brian Wrenn Division of Water Quality Wetlands /401 Unit
File B 4989 Revised
jzmtorutj E Prot" Our Sta tel
T
NCDENR
North Carolina Ecosystem Enhancement Proaram 1652 Mail Service Center Raleigh NC 27699 1652 / 919 715 0476 / www nceeo net

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United States Forest Service 160 Zdlicoo St Ste.A Asheville NC 28801 -1082
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Dagnino, Carla S
From Dagnino Carla S
Sent Tuesday January 10 2012 9 41 AM
To mike parker @ncdenr gov
Cc Hemphill Jeffrey L
Subject B 4989 Transylvania County
Attachments B 4989 404 Application Addendum pdf B 4989 Revised Perm itDrawings pdf B 4989 STIR
FB 05 DOT Revised pdf 20120109133448688 pdf GP 31 pdf
Importance High
Hi Mike
We received a 401 from you back in August 2011 for this project We did not receive a 404 due to the USACE finding our
application and document not complete in respect to alternative selection and avoidance /minimization measures when
we go from a bridge to a culvert Last year several folks at DOT met and worked on the avoidance /minimization
measures for projects where culverts are being used in sensitive waters (such as trout)
In addition while we were in review of this particular project Lori noticed that the length of impact and culvert length
did not match up We received a new set of drawings and EEP acceptance letter to rectify this oversight in the initial
permit application That information was submitted to Lori and yesterday we received the 404 for this project
Attachments for your review
• 404 application addendum sent to USACE November 8 2011
• Revised permit drawings showing the impacts of 53 feet for the culvert and 20 feet for bank stabilization
(previous application had 33 feet for the culvert and 17 feet for bank stabilization)
• Revised EEP acceptance
• Section 404 Permit from USACE
• GP31 Conditions
I am sorry we left you out of the loop That was a mistake on our part At this point I would like to know what you need
from us to acquire a modified 401 We are running against a tight clock (January 31 review date for the permit) so any
way you can help our would be appreciated
Thanks
Carla
Carla Dognino
Project Management Group
Natural Environment Unit
NCDOT Project Development and Environmental Analysis
Voicemail 919 707 6110
FAX [phone]