20051711 Ver 2_401 Application_20190617

0 O OS/ �// V
WithersRavenel Letter of Transmittal
4; TE 06/17/19 JOB NO. 03140485.40
219 Station Road, Suite 101 'FTENTION Ms.Karen Higgins
Wilmington, North Carolina 28405
•
t: 910.256.9277 I f: 910.256.2584
Burlington-Alamance Regional Airport _
TO: NC Division of Water Resources-401 Wetlands Unit Twin Arch Culvert Rehab
512 N.Salisbury Street;9th Floor Burlington,Alamance Co.
Raleigh, NC27604 NWP 3 PCN Submittal
WE ARE SENDING YOU 0 Attached ❑ Under Separate Cover via
THE FOLLOWING ITEMS ❑ Shop Drawings ❑ Prints ❑ Plans ❑ Samples ❑ Specifications
❑ Copy of Letter ❑ Change Order ❑ Diskette ❑ Other
COPIES DATE. NCte; DESCRIPTION
1 06/17/19 03140485.40 NWP 3 PCN (Courtesy Copy)
1 06/17/19 03140485.40 CD of PCN
1
THESE ARE TRANSMITTED as checked below
❑ For approval ❑Approved as submitted ❑ Resubmit copies for approval
I] For your use ❑Approved as noted ❑ Submit copies for distribution
❑ As requested ❑ Returned for corrections ❑ Return corrected prints
❑ For review and comment ❑ Other
❑ FOR BIDS DUE ❑ PRINTS RETURNED AFTER LOAN TO US
REMARKS:
ECEIVEIO)
JUN 1 7 2019
DEO-WATER RESOURCES
era Y ni itrr n......--.—
COPY TO: File SIGNED: Troy Beasley
If enclosures are not as noted, kindly notify us at once.

%. WithersRavenet
Our People. Your SuccessIl
June 17, 2019
US Army Corps of Engineers NC-Division of Water Resources
Raleigh Regulatory Field Office 401 & Buffer Permitting Unit
Mr. Dave Bailey Ms. Karen Higgins
3331 Heritage Trade Drive 1617 Mail Service Center
Suite 105 Raleigh, NC 27699
Wake Forest, NC 27587
Re: Burlington-Alamance Regional Airport - Twin Arch Culvert Rehab
NWP 3 PCN Submittal
Burlington, Alamance County
WR Project #03140485.40
Dear Mr. Bailey and Ms. Higgins,
On behalf of the Burlington-Alamance Airport Authority,we are requesting authorization from the
USACE to use NWP 3 for 50 If of temporary stream impacts for removal of accumulated sediment
and debris within and on the downstream end of the existing twin arch culverts within Gum Creek
beneath the runway. The proposed project does not meet conditions specified in Water Quality
General Certification No. 4132 as requiring written authorization from NCDWR, and therefore
this application is being provided as a courtesy. We are requesting an email from NCDWR
concurring that the project does not require written authorization for our files.
Impact to Jordan Lake Riparian Buffers will be permitting through the City of Burlington as the
delegated municipality.
The proposed project is located at the Burlington Alamance Regional Airport (Parcel ID: 120190),
which is located at 3441 N. Aviation Drive in Burlington, Alamance County. The project area is
±3.0 acres in size,and is specifically located ±2400 If west of the end of Runway 4(Lat: 36.051293;
Long: -79.471332).
The project is located in the Cape Fear River basin (Jordan) and Gum Creek runs through the
project site. The Water Quality Classification for Gum Creek is WS-V;NSW, and the Stream Index
Number is: 16-19-7). The cataloging unit for the site is 03030002.
Proposed Project
The purpose of the proposed project is to conduct maintenance of the existing culverts in order
to remove accumulated sediment and debris within the twin arch culverts and to remove
accumulated sediment on the south end of the culverts in order to improve flow.
The existing culverts consist of twin 20-ft wide x 10 ft high multi-plate arch culverts, which were
installed during the runway extension project in 1994. The twin arch culverts function such that
the northern culvert conveys base flow, and the southern culvert conveys high flow only. Over
219 Station Road.Suite 101 i Wilmington. NC 28405
t: 910.256.9277 i www.withersravenel.com I License No. C-0832
Asheville I Cary Greensboro i Pittsboro i Raleigh I Wilmington

Burlington-Alamance Regional Airport Withers Rave n e l
Twin Arch Culvert Rehab 1/
•
time, significant sediment and debris have accumulated within both culverts (see Photographic
Documentation appendix). Additionally, a significant amount of sediment has accumulated along
the southern bank of Gum Creek to the point that the sediment is several feet above natural grade
(see Photographic Documentation appendix). The sediment accumulation is partially blocking the
southern culvert and narrowing the channel flowing out of the northern culvert. Approximately
25 cubic yards of accumulated sediment will be removed from the south end of the culverts.
The proposed maintenance of the culverts consists of removal of accumulated sediment and debris
within both culverts, as well as removal of the accumulated sediment on the downstream end of
the culverts in order to improve the overall flow of both culverts. Removal of the sediment within
the culverts will be completed by using a small skid steer(e.g. bobcat)with a front bucket to scoop
up the sediment and debris and transport it through the culverts to the temporary staging area on
the south bank of the western end of the culverts. The removed material will be loaded and
trucked to an upland stockpile area within the airport property. In order to remove the sediment
within the southern culvert (high flow only), a temporary diversion dam will be constructed using
stacked sandbags to divert flow into the norther culvert (base flow) in the event of a storm during
maintenance activities. During sediment removal within the northern culvert,which conveys base
flow, a temporary sandbag diversion wall will be installed down the middle of the entire length
culvert. The temporary sandbag diversion will allow base flow to be contained to one half of the
culvert while sediment and debris is being removed in the other half in dry conditions. Once the
sediment and debris have been removed from the first half of the culvert, the upstream end of the
sandbag diversion will be shifted to shift base flow to the clean half of the culvert, allowing the
removal of sediment and debris within the second half of the culvert.
The accumulated sediment on the downstream end of the culvert will be removed using either a
small skid steer with a front bucket, or mini-excavator stationed within the southern culvert. The
stream bottom on the downstream end of the culvert is bedrock, so the sediment as the sediment
will be removed to the bedrock.
Access to the project will occur by utilizing an existing construction road from the original
construction of the culverts. Due to the existing topography, equipment access into the culverts
can only occur from the south side of Gum Creek on the western end of the culverts. A temporary
bridge will be constructed to allow travel across Gum Creek. The temporary bridge will be
constructed such that it spans the entire stream, resting on both banks, prevent disturbance to
Gum Creek. In order to provide access into the culverts, the existing rip-rap on the south bank
will be removed and the south bank will be graded to provide sufficient grades for equipment to
access the culverts safely. Once the maintenance is complete, the south bank will be restored to
pre-existing grades and the rip-rap placed back on the bank.
Project History
WithersRavenel conducted a delineation of the project area in July 2018. The project area
contains a single jurisdictional perennial stream (Gum Creek). There are no wetlands within the
specific project area. Please note that we are not requesting a Jurisdictional Determination in
conjunction with issuance of the NWP 3.
Page 2 of 4

Burlington-Alamance Regional Airport 11110
� VVithersRavenet
Twin Arch Culvert Rehab
The USACE has previously issued permits for the Burlington-Alamance Regional Airport under the
following Al Ds: SAW-2002-20906; SAW-2003-20418; SAW-2008-01034.
Gum Creek is a depicted perennial stream and subjectivity to Jordan Lake riparian buffers was
conceded and a formal buffer determination was not requested. Impacts to Jordan Lake riparian
buffers will be reviewed and approved by the City of Burlington as the delegated municipality.
Proposed Impacts
The proposed impacts consist of 50 If of temporary stream impacts.
The removal of the accumulated sediment on the downstream (east) of the culverts will result in
20 If of temporary stream impacts (Impact 1). Please note that the accumulated sediment to be
removed is located on the south bank of Gum Creek, and not actually within the stream channel.
The temporary impacts will occur as a result of installation of the sandbag diversion dam, which
will both divert flow as needed within the northern culvert(base flow)and provide protection from
sediment release during removal of sediment and debris within the southern culvert (high flow
only).
The installation of the temporary sandbag diversion dam on the upstream end of the culvert(west)
to divert high flow to the northern culvert will result in 30 If of temporary stream impacts (Impact
2).
Upon completion of the proposed maintenance,the temporary sandbag diversion will be removed
by hand.
Avoidance and Minimization
The project consists of culvert maintenance, and therefore impacts to Gum Creek could not be
avoided. Stream impacts have been minimized through the project design and maintenance
techniques to be used. Specifically, the culverts are 20 ft wide x 10 ft high, which is large enough
that a small skid-steer can operate easily within the culverts, avoiding the need for disturbance to
the stream for operation of equipment. The use of temporary sandbag diversions allow the base
flow within the northern culvert to be manipulated such that sediment removal can be completed
while maintaining normal flow, eliminating the need to temporarily dam up Gum Creek and pump
flow around the culverts which affect aquatic life passage. The temporary sandbag diversion also
provides protection against turbidity issues within Gum Creek during sediment removal.
Stream impact have been avoided for access to the culverts through the use of a temporary bridge
to cross Gum Creek.
Mitigation
The proposed stream impacts are temporary, and therefore mitigation is not proposed.
Page 3 of 4

Burlington-Alamance Regional Airport Withers Rave n e l
Twin Arch Culvert Rehab
The current request is for 50 If of temporary stream impacts(see the attached maps and PCN for
details).
Please feel free to call if you have questions or require additional information.
Sincerely
WithersRavenel
Troy Beasley
Senior Environmental Scientist
Attachments:
• PCN Form
• Agent Authorization
• Parcel/Owner Information
• Figure 1 - Project Location Exhibit
• Figure 2 - Aerial Photo
• Figures 3 & 4 - USGS Quads
• Figure 5 - Alamance County Soil Survey
• Figure 6 - Delineation Exhibit
• Photo Documentation
• Approved CATEX (NEPA)
• USFWS T&E Species List for Alamance Co.
• NCNHP Project Review Letter
• Impact Exhibits
Page 4 of 4

OF W ATF9
o� pG Office Use Only:
r- Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Pre-Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1 a. Type(s)of approval sought from the
Corps: ® Section 404 Permit ❑ Section 10 Permit
lb. Specify Nationwide Permit(NWP) number: 3 or General Permit(GP) number:
lc. 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
LI 401 Water Quality Certification—Express [' Riparian Buffer Authorization
le. Is this notification solely for the record For the record only for DWQ 401 For the record only for Corps Permit:
because written approval is not required? Certification:
® Yes ❑ No ❑ Yes ® No
1f. Is payment into a mitigation bank or in-lieu fee program proposed for mitigation ❑ Yes ® No
of impacts? If so, attach the acceptance letter from mitigation bank or in-lieu
fee program.
1g. Is the project located in any of NC's twenty coastal counties. If yes, answer lh ❑ Yes ❑ No
below.
1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ❑ Yes ❑ No
2. Project Information
2a. Name of project: Burlington-Alamance Regional Airport—Twin Arch Culvert Rehab
2b. County: Alamance
2c. Nearest municipality/town: Burlington
2d. Subdivision name:
2e. NCDOT only, T.I.P. or state
project no:
3. Owner Information
3a. Name(s)on Recorded Deed: Burlington Alamance Airport
3b. Deed Book and Page No. Book: 1249; Page: 0093
3c. Responsible Party(for LLC if Dan Danieley—Executive Director
applicable):
3d. Street address: 3441 N. Aviation Drive
3e. City, state, zip: Burlington, NC 27244
3f. Telephone no.: [phone]
3g. Fax no.:
3h. Email address: dan(@,flyburlinqtonnc.com
Page 1 of 12
PCN Form —Version 1.3 December 10, 2008 Version

4. Applicant Information(if different from owner)
4a. Applicant is: ❑ Agent ❑ Other, specify:
4b. Name:
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: Troy Beasley
5b. Business name WithersRavenel
(if applicable):
5c. Street address: 219 Station Road, Suite 101
5d. City, state, zip: Wilmington, NC 28405
5e. Telephone no.: [phone]
5f. Fax no.:
5g. Email address: tbeaslev c(D.withersravenel.com
Page 2 of 12
PCN Form —Version 1.3 December 10, 2008 Version

B. Project Information and Prior Project History
1. Property Identification
la. Property identification no. (tax PIN or parcel ID): PID: 120190
lb. Site coordinates (in decimal degrees): Latitude: 36.051293 Longitude: 79.471332
(DD.DDDDDD) (-DD.DDDDDD)
Parcel: ±350 acres
lc. Property size: Project Area-±3.0 acres
2. Surface Waters
2a. Name of nearest body of water(stream, river, etc.)to Gum Creek(Stream Index: 16-19-7)
proposed project:
2b. Water Quality Classification of nearest receiving water: WS-V; NSW
2c. River basin: Cape Fear(Jordan) HUC 03030002
Page 3 of 12
PCN Form—Version 1.3 December 10, 2008 Version

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:
The project is located within the existing Burlington-Alamance Regional Airport. Existing conditions consist of a perennial
stream (Gum Creek)on both ends of the existing twin culverts beneath Runway 24.
The general land use in the vicinity consists of a mixture of commercial land use, residential land use and undeveloped
woodlands.
3b. List the total estimated acreage of all existing wetlands on the property:
N/A—There are no wetlands within the project area.
3c. List the total estimated linear feet of all existing streams (intermittent and perennial)on the property:
50 If of stream within the project area.
3d. Explain the purpose of the proposed project:
The purpose of the proposed project is to conduct maintenance of the existing culverts in order to remove accumulated
sediment and debris within the twin arch culverts and to remove accumulated sediment on the south end of the culverts in
order to improve flow.
3e. Describe the overall project in detail, including the type of equipment to be used:
The existing culverts consist of twin 20-ft wide x 10 ft high multi-plate arch culverts,which were installed during the
runway extension project in 1994. The twin arch culverts function such that the northern culvert conveys base flow, and
the southern culvert conveys high flow only. Over time, significant sediment and debris have accumulated within both
culverts (see Photographic Documentation appendix). Additionally, a significant amount of sediment has accumulated
along the southern bank of Gum Creek to the point that the sediment is several feet above natural grade (see
Photographic Documentation appendix). The sediment accumulation is partially blocking the southern culvert and
narrowing the channel flowing out of the northern culvert. Approximately 25 cubic yards of accumulated sediment will be
removed from the south end of the culverts.
The proposed maintenance of the culverts consists of removal of accumulated sediment and debris within both culverts,
as well as removal of the accumulated sediment on the downstream end of the culverts in order to improve the overall
flow of both culverts. Removal of the sediment within the culverts will be completed by using a small skid steer(e.g.
bobcat)with a front bucket to scoop up the sediment and debris and transport it through the culverts to the temporary
staging area on the south bank of the western end of the culverts. The removed material will be loaded and trucked to an
upland stockpile area within the airport property. In order to remove the sediment within the southern culvert(high flow
only), a temporary diversion dam will be constructed using stacked sandbags to divert flow into the norther culvert(base
flow)in the event of a storm during maintenance activities. During sediment removal within the northern culvert,which
conveys base flow, a temporary sandbag diversion wall will be installed down the middle of the entire length culvert. The
temporary sandbag diversion will allow base flow to be contained to one half of the culvert while sediment and debris is
being removed in the other half in dry conditions. Once the sediment and debris have been removed from the first half of
the culvert, the upstream end of the sandbag diversion will be shifted to shift base flow to the clean half of the culvert,
allowing the removal of sediment and debris within the second half of the culvert.
The accumulated sediment on the downstream end of the culvert will be removed using either a small skid steer with a
front bucket, or mini-excavator stationed within the southern culvert. The stream bottom on the downstream end of the
culvert is bedrock, so the sediment as the sediment will be removed to the bedrock.
Access to the project will occur by utilizing an existing construction road from the original construction of the culverts.
Due to the existing topography, equipment access into the culverts can only occur from the south side of Gum Creek on
the western end of the culverts. A temporary bridge will be constructed to allow travel across Gum Creek. The temporary
bridge will be constructed such that it spans the entire stream, resting on both banks, prevent disturbance to Gum Creek.
In order to provide access into the culverts, the existing rip-rap on the south bank will be removed and the south bank will
be graded to provide sufficient grades for equipment to access the culverts safely. Once the maintenance is complete,
the south bank will be restored to pre-existing grades and the rip-rap placed back on the bank.
Page 4 of 12
PCN Form—Version 1.3 December 10, 2008 Version

4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property/
project(including all prior phases)in the past? El Yes ® No D Unknown
Comments:
4b. If the Corps made the jurisdictional determination, what type ❑ Preliminary ❑ Final
of determination was made?
4c. If yes, who delineated the jurisdictional areas? Agency/Consultant Company:WithersRavenel
Name (if known): Troy Beasley Other: •
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
WithersRavenel conducted a delineation of the project area in July 2018. The project area contains one jurisdictional
perennial stream (Gum Creek). There are no wetlands within the project area. Please note that we are not requesting
issuance of a JD in conjunction with issuance of the NWP 3.
Gum Creek is a perennial stream and subjectivity to Jordan Lake Riparian Buffers is conceded. A site visit was
conducted on 12/7/17 by Chester Patterson with the City of Burlington, and Mr. Patterson determined that the riparian
buffers of Gum Creek stopped at the toe of the fill slope of the runway, as runway was considered an Existing
Transportation Facility(ETF).
5. Project History
5a. Have permits or certifications been requested or obtained for ®Yes ❑ No El Unknown
this project(including all prior phases)in the past?
5b. If yes, explain in detail according to"help file"instructions.
The USACE has previously issued permits for the Burlington-Alamance Regional Airport under the following AIDs: SAW-
2002-20906; SAW-2003-20418; SAW-2008-01034.
6. Future Project Plans
6a. Is this a phased project? ❑Yes ® No
6b. If yes, explain.
r-,
Page 5 of 12
PCN Form—Version 1.3 December 10, 2008 Version

•
C. Proposed Impacts Inventory
1. Impacts Summary
1a. Which sections were completed below for your project(check all that apply):
❑Wetlands ® Streams-tributaries ❑ Buffers
El 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. i 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)
W1 ❑ P ❑ T ❑Yes ❑ Corps
❑ No ❑ DWQ
, 2g.Total wetland impacts
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 jurisdiction Average Impact
number- (PER)or (Corps-404, 10 stream length
Permanent(P)or intermittent DWQ—non-404, width (linear
Temporary(T) (INT)? other) (feet) feet)
Impact 1 Sediment Gum Creek ® PER ® Corps 20' 20
❑ P ®T Removal ❑ INT ® DWQ
Impact 2 Sediment ® PER ® Corps
❑ P ®T Removal Gum Creek ❑ INT LE] DWQ
20' 30
3h.Total stream and tributary impacts 50
3i. 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 individually list all open water impacts below.
4a. 4b. •4c. 4d. 4e.
Open water Name of waterbody
impact number— (if applicable) Type of impact Waterbody type Area of impact(acres)
Permanent(P)or
Temporary(T)
01 ❑ P❑ T
02 ❑ P❑ T
03 [' POT
04 [' POT
4f.Total open water impacts
4g. Comments:
Page 6 of 12
PCN Form—Version 1.3 December 10, 2008 Version

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 purpose (acres)
- number of pond
Flooded Filled Excavated 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:
5i. 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 ❑ Tar-Pamlico ® Other: Jordan
Project is in which protected basin? ❑ Catawba ❑ Randleman
6b. 6c. 6d. 6e. 6f. 6g.
Buffer impact
number- Reason Buffer Zone 1 impact Zone 2 impact
Permanent(P)or for Stream name mitigation (square feet) (square feet)
.Temporary(T) impact required?
B1 ❑ P ❑T ❑Yes
❑ No
B2 ❑ P ❑T Yes
❑ No
B3 ❑ P ❑T Yes
❑ No
6h.Total buffer impacts
6i. Comments: Buffer impacts will be permitted through the Town of Burlington as the delegated municipality.
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The project consists of culvert maintenance, and therefore impacts to Gum Creek could not be avoided. Stream impacts have
been minimized through the project design and maintenance techniques to be used. Specifically, the culverts are 20 ft wide
x 10 ft high,which is large enough that a small skid-steer can operate easily within the culverts, avoiding the need for
disturbance to the stream for operation of equipment. The use of temporary sandbag diversions allow the base flow within the
northern culvert to be manipulated such that sediment removal can be completed while maintaining normal flow, eliminating
the need to temporarily dam up Gum Creek and pump flow around the culverts which affect aquatic life passage. The
temporary sandbag diversion also provides protection against turbidity issues within Gum Creek during sediment removal.
Stream impact have been avoided for access to the culverts through the use of a temporary bridge to cross Gum Creek.
lb. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
A small skid-steer will be used to conduct the maintenance activities,which has the ability to operate within the culverts,
eliminated the need to disturb the stream channel with equipment. Access to the project area will occur in uplands,with a
temporary bridge constructed over Gum Creek.
Page 7of12
PCN Form-Version 1.3 December 10, 2008 Version

2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for ❑Yes ® No
impacts to Waters of the U.S. or Waters of the State?
2b. If yes,mitigation is required by(check all that apply): ❑ DWQ ❑ Corps
❑ Mitigation bank
2c. If yes,which mitigation option will be used for this ❑ Payment to in-lieu fee program
project?
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank:
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: 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 ❑Yes ® No
buffer mitigation?
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.
6c. 6d. 6e.
Zone Reason for impact Total impact Multiplier Required mitigation
(square feet) (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:
Page 8 of 12
PCN Form—Version 1.3 December 10, 2008 Version

E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan.
la. 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: The proposed project consists of maintenance of an existing culvert and ❑ Yes ® No
will not result in impervious area that requires stormwater management or diffuse
flow.
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: The project consists of maintenance of
existing culverts and stormwater management is not required.
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
® 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 government's jurisdiction is this project? City of Burlington
® Phase II
3b. Which of the following locally-implemented stormwater management programs ® NSW
apply(check all that apply): ❑ USMP
®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
❑ HQW
4a. Which of the following state-implemented stormwater management programs apply ❑ ORW
(check all that apply): ❑ 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
5b. Have all of the 401 Unit submittal requirements been met? ❑Yes ❑ No
Page 9 of 12
PCN Form—Version 1.3 December 10, 2008 Version

F. Supplementary Information
1. Environmental Documentation(DWQ Requirement)
1a. Does the project involve an expenditure of public(federal/state/local)funds or the ®Yes ❑ No
use of public(federal/state)land?
1 b. 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 /1 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
letter.)
®Yes ❑ No
Comments:A CATEX was approved for the proposed project by the NCDOA on
10/31/18,which documents that no further NEPA review is required. A copy of the
CATEX approval has been provided as an Appendix.
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 2B .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 ® No
additional development,which could impact nearby downstream water quality?
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.
The project consists of maintenance of existing culverts beneath the runway and will not be a catalyst for future
development that could impact nearby downstream water quality.
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.
N/A
Page 10 of 12
PCN Form—Version 1.3 December 10, 2008 Version

5. Endangered Species and Designated Critical Habitat(Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or El 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?
WR reviewed the NC Natural Heritage Program database, located at http://www.ncnhp.orq/web/nhp/home, as well as
NCNHP GIS data to identify if there were any known occurrences of endangered species on or near the proposed project.
The review of the NHP data did not identify any recent occurrences of federally listed threatened or endangered species
or critical habitat on the subject property or within 1.0 miles of the project, see attached NCNHP project review letter. The
only federally listed species identified as occurring within Alamance County are the Cape Fear shiner(E)and Atlantic
pigtoe (PT).
The proposed project area is not located within the known range of the Cape Fear Shiner. Gum Creek is a small, shallow
perennial stream with primarily a bedrock bottom with some large gravel substrate, which has significant sediment and silt
loads. Therefore, Gum Creek is not considered to be potential habitat for the Cape Fear shiner. Additionally, the
proposed temporary stream impacts consist of placement of sandbag diversions and removal of accumulated sediment
above the normal high water on the downstream end of the culvert. Neither of these activities would affect a potential
Cape Fear shiner population. Therefore, due to the project not being located within the known range of the Cape Fear
shiner, Gum Creek not being potential habitat and the proposed activities not impacting a potential population, WR
concludes that the proposed project will have No Effect on the Cape Fear shiner.
The proposed project is not located within the known range of the Atlantic pigtoe. Gum Creek is a small, shallow
perennial stream with a primarily bedrock bottom with some large gravel substrate, which has significant sediment and silt
loads, and does not have excellent water quality. Therefore, Gum Creek was not considered potential habitat for Atlantic
pigtoe. Additionally, the proposed temporary stream impacts consist of placement of sandbag diversions and removal of
accumulated sediment above the normal high water on the downstream end of the culvert. The placement of the
sandbag diversion dam on the bedrock bottom will not impact substrate that could contain a potential population of
Atlantic pigtoe. The sediment to be excavated below the culvert is adjacent to the stream channel, and have built up to
the point that it is above the OHW of Gum Creek. Therefore, a potential population of Atlantic pigtoe would not be
present within the area of sediment to be removed, as the sediment to be removed is only submerged during flood level
flow. Therefore, due to the project not being located within the known range of the Atlantic pigtoe, Gum Creek not being
potential habitat and the proposed activities not impacting a potential population, WR concludes that the proposed project
will have No Effect on Atlantic pigtoe.
6. Essential Fish Habitat(Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat? ❑ Yes ® No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
There are no waters classified as EFH in Alamance County.
Page 11 of 12
PCN Form —Version 1.3 December 10, 2008 Version

7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will 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?
WR reviewed the NC State Historic Preservation Office's online database, located at: http://qis.ncdcr.qov/hpoweb/, to
determine if there were any known historic or cultural resources within or in the vicinity of the proposed project. The
database review did not identify any known resources within or in the vicinity of the proposed project.
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain? ® Yes ❑ No
8b. If yes, explain how project meets FEMA requirements:The proposed project consists of removal of accumulated sediment
and debris within and on the downstream end of the existing twin arch culverts. The project will not result in fill placed
within the floodplain, and therefore will not result in a rise in flood elevation.
8c.What source(s)did you use to make the floodplain determination?www.ncfloodmaps.com
Troy Beasley— WithersRavenel
Authorized Agent 06/17/19
Applicant/Agent's Signature Date
Applicant/Agent's Printed Name (Agent's signature is valid only if an authorization letter from the applicant
is provided.)
Page 12 of 12
PCN Form—Version 1.3 December 10, 2008 Version

1% WithersRavenel
AGENT AUTHORIZATION

11• WithersRavenet
pp Our People.Your Success.
ill
AUTHORITY FOR APPOINTMENT OF AGENT
The undersigned Owner Burlington-Alamance Airport Authority (Client) does hereby
appoint WithersRavenel. Inc. as his, her, or it's agent for the purpose of petitioning the
appropriate local, state and federal environmental regulatory agencies (US Army Corps of
Engineers, NC Division of Water Quality, NC Division of Coastal Management, local
municipalities, etc.) for: a) review and approval of the jurisdictional boundaries of onsite
jurisdictional areas (wetlands, surface waters, riparian buffers, etc.) and/or; b) preparation
and submittal of appropriate environmental permit applications/requests for projects
associated with the Burlington-Alamance Regional Airport.
The Client does hereby authorize that said agent has the authority to do the following acts
on behalf of the owner:
(1) To submit appropriate requests/applications and the required
supplemental materials;
(2) To attend meetings to give representation on behalf of the Client.
(3) To authorize access to subject property for the purpose of
environmental review by appropriate regulatory agencies.
This authorization shall continue in effect until completion of the contracted task or
termination by the Client.
Date: S—_ / , /
Agent's Name,Address&Telephone: Signature of Client:
3/9ti JfIN/ £ L i `/ �'x£ccr / vL
WithersRavenel,Inc •
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(Name-Print) (Title)
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115 MacKenan Drive
Cary,NC 27511 (Signature)
Tel.[phone] ,2 yy/ //, f¢ ,le 77a ) -Die/ v`‘--
Mailing Address
L,2 / ,0/3 ; // 0- a 9af`
City State Zip r�
Phone: 2 3 6. a o7 /Zi & / 9/
Email: CAA 1j�JZu . 67‘57/07

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PARCEL/OWNER INFO

eCON N ECTGI S .' ALAMANCE AlamanceCounty
? Q 5 Printed November 28,2016
WEB HOSTING COUNTY See Below for Disclaimer
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8863073341 120190
• Old Tax ID CalcAcres
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Owner Name 2nd Ownr Name
BURLINGTON ALAMANCE AIRPORT
Parcel Ownr Addrs OwnCitv
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1249 3441 N AVIATION DR
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20555587
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1993
Welcome to the Alamance County GIS Site.THIS IS NOT A LEGAL DOCUMENT.Alamance County shall assume no liability for any errors, omissions, or
inaccuracies in the information provided regardless of how caused; or any decisions made or actions taken or not taken by user in reliance upon any
information or data furnished hereunder.The user knowingly waives any and all claims for damages against any and all of the entities comprising the
ALAMANCE COUNTY GIS SYSTEM that may arise from the mapping data.**IMPORTANT NOTE:This web map is intended to provide general information as to
the individual school attendance zones.The completeness or accuracy of the mapping is not guaranteed nor should the user assume the results as a guarantee
of student placement at any school.Addresses that are on or near an attendance line should be confirmed by the Alamance-Burlington School District
Transportation Department 336-570-6541.**

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PHOTOGRAPHIC DOCUMENTATION

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11111Our People.Your Success.
Photographic Documentation
Burlington-Alamance Regional Airport - Twin Arch Culvert Rehab
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Photo 1: View of twin arch culvert from downstream, facing west. Note sediment
accumulation below culvert(southern - dry) on the left side of the photo.
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Photo 2: View of built up sediment within the southern culvert(dry) to be removed.
219 Station Road.Suite 101 I Wilmington, NC 28405
t: 910.256.9277 I www.withersravenel.com I License No. C-0832
Asheville I Cary I Greensboro I Pittshoro I Raleigh I Wilmington

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Photo 3:View of interior of northern culvert(base flow).
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Photo 4: View of existing construction road to be used for temporary construction access.
Page 2 of 2

WithersRavenel
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APPROVED CATEX (N EPA)

ARP SOP No. 5.1 Effective Date; June 2, 2017
FAA Decision
Having reviewed the above information, it is the FAA's decision that the proposed project(s)or
development warrants environmental processing as indicated below.
Name of Airport,LOC ID,and location:
Burlington-Alamance Regional Airport(BUY)
3441 North Aviation Drive
Burlington, NC 27215
Project Title:
Twin Arch Culvert Rehabilitation
No further NEPA review required.Project is categorically excluded per(cite applicable
1050.1.E CATEX that applies: )
❑..An Environmental Assessment(EA)is required.
❑..An Environmental Impact Statement(EIS)is required.
❑..The following additional documentation is necessary for FAA to perform a complete
environmental evaluation of the proposed project.
Name: e. t`kj fr. Pfitri;d /qv
Responsible FAA Official
•
Signature: & ,4ZF 8-1/ Date: 16/ 3( /I f'
A-18

MI WithersRaven&
1110 _
USFWS T&E LIST FOR ALAMANCE CO.

U.S. Fish & Wildlife Service
Endangered Species, Threatened Species,Federal Species of
Concern, and Candidate Species,
Alamance County, North Carolina
gralrimarviirt
auk," Liffiraavalygot „Imp
drava
VAT
Updated: 10-04-2018
Common Name Scientific name Federal Record Status
Status
Vertebrate:
Cape Fear shiner Range by Notropis mekistocholas E Current
Basin
Invertebrate:
Atlantic pigtoe Range by Basin Fusconaia masoni ARS Current
Vascular Plant:
Nonvascular Plant:
Lichen:
Definitions of Federal Status Codes:
E =endangered. A taxon "in danger of extinction throughout all or a significant portion of its range."
T=threatened. A taxon "likely to become endangered within the foreseeable future throughout all or
a significant portion of its range."
C = candidate. A taxon under consideration for official listing for which there is sufficient information
to support listing. (Formerly "Cl" candidate species.)
BGPA =Bald and Golden Eagle Protection Act. See below.
ARS =At Risk Species. Species that are Petitioned, Candidates or Proposed for Listing under the
Endangered Species Act. Consultation under Section 7(a)(2) of the ESA is not required for Candidate
or Proposed species; although a Conference, as described under Section 7(a)(4) of the ESA is
recommended for actions affecting species proposed for listing.
FSC=Federal Species of Concern. FSC is an informal term. It is not defined in the federal Endangered
Species Act. In North Carolina, the Asheville and Raleigh Field Offices of the US Fish and Wildlife
Service(Service) define Federal Species of Concern as those species that appear to be in decline or
otherwise in need of conservation and are under consideration for listing or for which there is
insufficient information to support listing at this time.Subsumed under the term "FSC" are all species

petitioned by outside parties and other selected focal species identified in Service strategic plans,
State Wildlife Action Plans, or Natural Heritage Program Lists.
T(S/A) =threatened due to similarity of appearance. A taxon that is threatened due to similarity of
appearance with another listed species and is listed for its protection. Taxa listed as T(S/A) are not
biologically endangered or threatened and are not subject to Section 7 consultation. See below.
EXP= experimental population. A taxon listed as experimental (either essential or nonessential).
Experimental, nonessential populations of endangered species (e.g., red wolf) are treated as threatened
species on public land, for consultation purposes, and as species proposed for listing on private land.
P =proposed. Taxa proposed for official listing as endangered or threatened will be noted as "PE" or
"PT", respectively.
Bald and Golden Eagle Protection Act (BGPA):
In the July 9, 2007 Federal Register( 72:37346-37372),the bald eagle was declared recovered, and
removed (de-listed) from the Federal List of Threatened and Endangered wildlife. This delisting took
effect August 8,2007. After delisting,the Bald and Golden Eagle Protection Act (Eagle Act) (16
U.S.C. 668-668d)becomes the primary law protecting bald eagles. The Eagle Act prohibits take of
bald and golden eagles and provides a statutory definition of"take" that includes "disturb". The
USFWS has developed National Bald Eagle Management Guidelines to provide guidance to land
managers, landowners, and others as to how to avoid disturbing bald eagles. For mor information,
visit http://www.fws.gov/migratorybirds/baldeagle.htm
Threatened due to similarity of aupearance(T(S/A)):
In the November 4, 1997 Federal Register(55822-55825), the northern population of the bog turtle
(from New York south to Maryland)was listed as T (threatened), and the southern population (from
Virginia south to Georgia)was listed as T(S/A) (threatened due to similarity of appearance). The T
(S/A) designation bans the collection and interstate and international commercial trade of bog turtles
from the southern population. The T(S/A) designation has no effect on land management activities by
private landowners in North Carolina,part of the southern population of the species. In addition to its
official status as T(S/A),the U.S. Fish and Wildlife Service considers the southern population of the
bog turtle as a Federal species of concern due to habitat loss.
Definitions of Record Status:
Current-the species has been observed in the county within the last 50 years.
Historic -the species was last observed in the county more than 50 years ago.
Obscure - the date and/or location of observation is uncertain.
Incidental/migrant -the species was observed outside of its normal range or habitat.
Probable/potential -the species is considered likely to occur in this county based on the proximity of
known records (in adjacent counties), the presence of potentially suitable habitat, or both.

1/ WithersRavenel
Wr
NCNHP PROJECT REVIEW LETTER

• im
•• • NC DEPARTMENT OF Susi Hamilton.Secretary
•■ieJ■ NATURAL AND CULTURAL RESOURCES
▪ Nom Walter Clark. Director,Land and Water Stewardship
NCNHDE-9286
June 14, 2019
Troy Beasley
Withers & Ravenel
115 MacKenan Drive
Cary, NC 27511
RE: BARA Twin Arch Culvert Rehab; 03140485.40
Dear Troy Beasley:
The North Carolina Natural Heritage Program (NCNHP) appreciates the opportunity to provide
information about natural heritage resources for the project referenced above.
Based on the project area mapped with your request, a query of the NCNHP database indicates that
there are no records for rare species, important natural communities, natural areas, and/or
conservation/managed areas within the proposed project boundary. Please note that although there
may be no documentation of natural heritage elements within the project boundary, it does not
imply or confirm their absence; the area may not have been surveyed. The results of this query
should not be substituted for field surveys where suitable habitat exists. In the event that rare
species are found within the project area, please contact the NCNHP so that we may update our
records.
The attached 'Potential Occurrences' table summarizes rare species and natural communities that
have been documented within a one-mile radius of the property boundary. The proximity of these
records suggests that these natural heritage elements may potentially be present in the project area
if suitable habitat exists. Tables of natural areas and conservation/managed areas within a one-mile
radius of the project area, if any, are also included in this report.
If a Federally-listed species is found within the project area or is indicated within a one-mile radius of
the project area, the NCNHP recommends contacting the US Fish and Wildlife Service (USFWS) for
guidance. Contact information for USFWS offices in North Carolina is found here:
httos://www.fws.gov/offices/Directory/ListOffices.cfm?statecode=37.
Please note that natural heritage element data are maintained for the purposes of conservation
planning, project review, and scientific research, and are not intended for use as the primary criteria
for regulatory decisions. Information provided by the NCNHP database may not be published
without prior written notification to the NCNHP, and the NCNHP must be credited as an information
source in these publications. Maps of NCNHP data may not be redistributed without permission.
The NC Natural Heritage Program may follow this letter with additional correspondence if a
Dedicated Nature Preserve, Registered Heritage Area, Clean Water Management Trust Fund
easement, or Federally-listed species are documented near the project area.
If you have questions regarding the information provided in this letter or need additional assistance,
please contact Rodney A. Butler at rod ney.butler ;ncdcr.gov or 919-707-8603.
Sincerely,
NC Natural Heritage Program
DEPARTMFNT or NATIIRAI. ANn COI T1 PAI. PFsojRcES

.
Natural Heritage Element Occurrences, Natural Areas, and Managed Areas Within a One-mile Radius of the Project Area
BARA Twin Arch Culvert Rehab
Project No. 03140485.40
June 14, 2019
NCNHDE-9286
lement Occurrences Documented Within a One-mile Radius of the Project Area
`axonomic ' ::E® pD1 Scientific Name Common Name: =o,. ' Element ': Aeeurac-.y` ' Ee`eral M ' v State; ;- °Globa'I' Stat 4:
.
�
oup s ' Observation ®ecurrenee" status Status 4Rank y'Ranks
.��. ` z Dante Rank r � R,, ���r��� Z`
utterfly 34484 Neonympha helicta . Helicta Satyr ' - 1980-Pre H. 5-Very ---. Significantly. G3G4 Sl?
Low • Rare .
o Natural Areas are Documented Within a One-mile Radius of the Project Area
o Managed Areas are Documented Within a One-mile Radius of the Project Area
?finitions and an explanation of status designations and codes can be found at httos://ncnhde.natureserve.ora/content/help. Data query generated on June 14,2019;source: NCNHP,Q2 Apr 2019.
ease resubmit your information request if more than one year.elapses before project initiation as new information is continually added to the NCNHP database.
•
•
Page 2 of 3

NCNHDE-9286: BARA Twin Arch Culvert Rehab
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Page 3 of 3

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CCCI r.\\ v
OVERALL AIRPORT LAYOUT - 1 650 325 0 650
Exhibit 1 - TWIN ARCH CULVERT REHABILITATION PROJECT AREA w ,�s'� E Scale

Z,--
6-,---------<-70/,...,..,..-.,:_,_,./.7,..- / '' i- .mil / �/'
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// � /// / �\\\\ \ \`� �'s`� � r REGULATORY
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N-/ /
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r ZONE AE SPECIAL
Z
/ / /Z \ \ J FLOOD HAZARD AREA
--- `-----
+ LOD LOD PROJECT AREA
7 / \ \ STREAM BANK
NOTE: EXISTING CULVERT CONSISTS OF / //� �� �� CENTERLINE
\\ \
/// /�� �\- \ . — TOP OF BANK
DUAL BARREL 18 0 X 10 9 HIGH /�
PLATE STEEL ARCH CULVERTS. \ / I TEMPORARY
INSTALLED ON SPREAD FOUNDATIONS. /// , �� �. /�//�/I STAGING 0
PROJECT AREA- 100 50 0 goo
Exhibit 2 - TWIN ARCH CULVERT REHABILITATION W �!:I:!'
OVERALL IMPACT 5 Scale

Z7♦♦ / /IMPACT AREA 1
I. j j ♦♦� ��o SEDIMENT tIADJACENTSTREAM
/
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. • ��,� APPROX. 25 CY OF SEDIMENT REMOVED
r 44 `O� / /7/ \
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♦•
ti,
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'y,� ' �. !.• �N' / SANDBAG DIVERSION FOR
<'O - .' �, , F\ SEDIMENT REMOVAL N
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741t*
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SEDIMENT REMOVAL V Q Zb- OK] O
/// / / ADJACENT TO STREAM \ / -\ 0 �o c.->
.� O ��0 \\\ LEGEND
\ �r�,����p � �� LOD PROJECT AREA
`, \ STREAM BANK
j QaD
EXISTING RIP RAP 'C) . 0. . .QQ CENTERLINE
(TYPICAL) �� - . - TOP OF BANK
\ \ i 4 `` Q�4V_ 10 O D� \\ STREAM BUFFER
/ --( " ,, Q< 0<CIA *`k:Q, ��O /� STREAM IMPACTS
- \ SANDBAG DIVERSION
c .� oa •- ___„__,_ � SEDIMENT REMOVAL
(5brn
o � <7�'\�F7J STREAM RE -NO
! IMPACTS
PROJECT AREA- v 30 15 0 30
,i')% E
EXHIBIT 3 - TWIN ARCH CULVERT REHABILITATION OUTLET IMPACTS (IMPACT AREA 1 )
nvi
S Scale

----- - ,� IMPACT 2
7
�� 06 Or INLET END TEMPORARY ACCESS ROAD
hl° es O ZONE 1 BUFFER STREAM IMPACTS - 823 SF
�O �O ZONE 2 BUFFER STREAM IMPACTS - 585 SF
-------- - �\O STREAM IMPACTS - 30 LF, 208 SF
0 4- / /
O
if"EMPORAR ELEVATED RIDGE GOB hoo
7 /
�
FOR NSTRUCy`�"q ACCESS. sso O\.O
SANDBAG DIVERSION
NSTRUCTED AT LOC ON ��� Pp� �_ FOR SEDIMENT REMOVAL.
PREVIOU REAM �O O BUFFER -
CROSSING ALIGNED WIT C� ONE 2 STREAM
EXISTING AD.
���� 20' FROM ZONE __
NO M IMPACTS ALLOWED. �'\ �+ � '
, i CIO Irk
/// A -1.5r........... .
, \ ik /
/—_ ir, _,c) 'Z / // Z
TOP �F— K o ;!AAA ,
g\) / �� =��t' ,��— / BASE F W CULVE
._ :-_ .- . ���%�7��i �— RT (WET)
"V-° 's
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C
3 / = O �.� ��= W ULVE� :���I . ���� RT (CRY)
STREAM BUFFER �iii►' LOD °
ZONE O
' 30' FROMTOPOFBAN INDY O `05 /
MEW
---G€) ----- y ., / z
��� • •1 —"��- / REMOVE RIP RAP AND /
"WO Q01 — OAp (0o° N1E)E BANK FOR LEGEND
Y A SS R ORARY ACCESS.
/ -■•'� ACCESS V PROJECT AREA
! M����. ORAR J / / RESTORE TO EXISTING LOD STREAM BANK
40�"i - TEMP / CONDITIONS AT CENTERLINE
/ /
� �' PROJECT COMPLETION. — . — TOP OF BANK
P���! O Or"
STREAM BUFFER
� / ZONES
2�-(O_^�O [� �o�� / / / STAGING AREA
�� v1` RY STREAM BUFFER
/Ay ,z
ZONE 2 IMPACTS
1O • AREA �C X X X X X STREAM BUFFER
ZONE 1 IMPACTS
- STREAM IMPACTS
h /� / / / SANDBAG DIVERSION
--C-ory LOD
PROJECT AREA-
,il 30 15 0 30�
l%
EXHIBIT 4 - TWIN ARCH CULVERT REHABILITATION INLET IMPACTS (IMPACT AREA 2) W 4 L Scale