20230477 Ver 1_ePCN Application_20230329

DWR
Division of Water Resources
Initial Review
Pre -Construction Notification (PCN) Form
For Nationwide Permits and Regional General Permits
(along with corresponding Water Quality Certifications)
April 13, 2022 Ver 4.3
Has this project met the requirements for acceptance in to the review process? *
Yes
No
Is this project a public transportation project?*
Yes No
Change only If needed.
Pre -Filing Meeting Date Request was submitted on:
6/24/2021
BIMS # Assigned * Version#*
20230477 1
Is a payment required for this project? *
No payment required
Fee received
Fee needed - send electronic notification
What amout is owed?*
$240.00
$570.00
Reviewing Office* Select Project Reviewer*
Asheville Regional Office - [phone] Andrew Moore:[e-mail]
Information for Initial Review
la. Name of project:
Carrier Bridge Pump Station Replacement Project
la. Who is the Primary Contact?*
MSD (POC: Darin Prosser)
1b. Primary Contact Email: * lc. Primary Contact Phone: *
[e-mail] [phone]
Date Submitted
3/29/2023
Nearest Body of Water
French Broad River
Basin
French Broad
Water Classification
B
Site Coordinates
Latitude:
35.569798
Longitude:
-82.565586
A. Processing Information O
Is this project connected with ARPA funding?
Yes No
County (or Counties) where the project is located:
Buncombe
Is this a NCDMS Project
Yes No
Is this project a public transportation project?*
Yes No

la. Type(s) of approval sought from the Corps:
Section 404 Permit (wetlands, streams and waters, Clean Water Act)
Section 10 Permit (navigable waters, tidal waters, Rivers and Harbors Act)
Has this PCN previously been submitted?*
Yes
No
1b. What type(s) of permit(s) do you wish to seek authorization?
Nationwide Permit (NWP)
Regional General Permit (RGP)
Standard (IP)
lc. Has the NWP or GP number been verified by the Corps?
Yes No
Nationwide Permit (NWP) Number: 58 - Utility Line Activities for Water and Other Substances (frequently used)
NWP Numbers (for multiple NWPS):
ld. Type(s) of approval sought from the DWR:
401 Water Quality Certification - Regular
Non-404 Jurisdictional General Permit
Individual 401 Water Quality Certification
le. Is this notification solely for the record because written approval is not required?
For the record only for DWR 401 Certification:
For the record only for Corps Permit:
If. Is this an after -the -fact permit application?*
Yes No
lg. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts?
Yes No
lg. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts?
Yes No
lh. Is the project located in any of NC's twenty coastal counties?
Yes No
1j. Is the project located in a designated trout watershed?
Yes No
B. Applicant Information
Id. Who is applying for the permit?
Owner Applicant (other than owner)
le. Is there an Agent/Consultant for this project? *
Yes No
2. Owner Information
2a. Name(s) on recorded deed:
Metropolitan Sewerage District of Buncombe County
2b. Deed book and page no.:
Deed Book 5927, Page No. 1789
2c. Contact Person:
MSD (POC: Darin Prosser)
2d. Address
Street Address
510 Riverview Drive
Address Line 2
City
Asheville
Postal / Zip Code
28806
401 Water Quality Certification - Express
Riparian Buffer Authorization
State / Province / Region
North Carolina
Country
USA
Yes No
Yes No

2e. Telephone Number: 2f. Fax Number:
[phone]
2g. Email Address:*
[e-mail]
4. Agent/Consultant (if applicable)
4a. Name:
Eric Mularski
4b. Business Name:
HDR Engineering, Inc. of the Carolinas
4c. Address
Street Address
440 S. Church Street
Address Line 2
Suite 1200
City
Charlotte
Postal / Zip Code
28202
4d. Telephone Number:
[phone]
4f. Email Address: *
[e-mail]
State / Province / Region
North Carolina
Country
USA
4e. Fax Number:
C. Project Information and Prior Project History U
1. Project Information
1b. Subdivision name:
(if appropriate)
lc. Nearest municipality / town:
Asheville
2. Project Identification
2a. Property Identification Number:
PIN# 963891989100000 (Project crosses
multiple parcels, see Attached Supplemental
Information Document and Attachment 3:
Figure 6)
2c. Project Address
Street Address
510 Riverview Drive
Address Line 2
City
Asheville
Postal / Zip Code
28806
3. Surface Waters
3a. Name of the nearest body of water to proposed project:*
French Broad River
3b. Water Resources Classification of nearest receiving water: *
B
3c. What river basin(s) is your project located in?*
French Broad
3d. Please provide the 12-digit HUC in which the project is located.
060101050705, 060101050901
4. Project Description and History
2b. Property size:
Phase 1 = 5,623.1 acres for total Project area;
Phase 2 property size to be determined
following final selection of the preferred
alignment (Phase 2 proposed for construction
in 2035).
State / Province / Region
North Carolina
Country
USA

4a. 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 site is located adjacent to the French Broad River in Asheville, NC (Attachment 3; Figure 1). The Project begins at the existing Carrier Bridge Pump Station, which serves as
part of the region's sanitary sewer/wastewater collection system and is classified as industrial land use. The Project areas transverse the French Broad River Park, Carrier Park, the
Asheville Greenway — French Broad River East Bank Corridor, and the French Broad River, all four of which are used for public recreation. The Project also transverses a portion of the
Biltmore Estate where land is being used for agricultural crops. Land use north and west of the Project areas is primarily residential with some commercial uses mixed in. Land use east of
the Project areas are primarily industrial and commercial. South of the Project areas is the Biltmore Estate, which has a mixture of agricultural, recreational, tourism, and undeveloped land
uses.
4b. Have Corps permits or DWR certifications been obtained for this project (including all prior phases) in the past? *
Yes No Unknown
4f. List the total estimated acreage of all existing wetlands on the property:
0.14 (Phase 1) and 0.99 (future phase)
4g. List the total estimated linear feet of all existing streams on the property:
3,455.37 (Phase 1) and 1,494 (future phase)
4h. Explain the purpose of the proposed project: *
See Attached Supplemental Information Document
4i. Describe the overall project in detail, including indirect impacts and the type of equipment to be used: *
See Attached Supplemental Information Document
5. Jurisdictional Determinations
5a. Have the wetlands or streams been delineated on the property or proposed impact areas? *
Yes
No Unknown
Comments:
Delineation efforts were originally conducted by Three Oaks Engineering, Inc. on December 29, 2021
for the initial study area. HDR revisited the site to assess additional areas on the east side of the
French Broad River along Lyman Street. Additional delineated limits were projected in 2023 based on
the initial 2021 delineation surveys to reflect Project alignment changes. Subsequent delineation
efforts have not been conducted to confirm the projected delineation limits (see Attachment 3: Figure
5).
5b. If the Corps made a jurisdictional determination, what type of determination was made?*
Preliminary Approved Not Verified Unknown N/A
Corps AID Number:
SAW-2021-01395 Action ID for Pre -Application Meeting
5c. If 5a is yes, who delineated the jurisdictional areas?
Name (if known): Nathan Howell, PWS
Agency/Consultant Company: Three Oaks Engineering, Inc.
Other: Eric Mularski, PWS — HDR Engineering, Inc. of the Carolinas
6. Future Project Plans
6a. Is this a phased project? *
Yes O No
6b. If yes, explain.
The Project, as outlined under Item 4i, will be conducted concurrently over the proposed schedule to begin in the Fall of 2024 and be completed by the Fall of 2027 (3-year construction
period). However, the Project includes installing a proposed 60-inch gravity sewer interceptor pipe across the French Broad River and is intended for the future extension of a 60-inch
gravity sewer interceptor pipeline proposed to be constructed in 2035 to replace an existing smaller diameter pipe and accommodate increased wastewater flow projections.
Are any other NWP(s), regional general permit(s), or individual permits(s) used, or intended to be used, to authorize any part of the proposed project or related activity?
Yes, MSD anticipates obtaining an NWP 58 prior to initiating construction for the proposed 60-inch gravity sewer interceptor pipe extension slated for the year 2035 once final alignment
can be determined, funding secured, and potential impacts to any wetland(s) or waterway(s) can be determined.
D. Proposed Impacts Inventory
1. Impacts Summary
la. Where are the impacts associated with your project? (check all that apply):
Wetlands Streams -tributaries
Open Waters Pond Construction
2. Wetland Impacts
Buffers
2a. Site #* (?)
2a1 Reason (?)
2b. Impact type* (?)
2c. Type of W.*
2d. W. name
2e. Forested *
2f. Type of Jurisdicition *
(?)
2g. Impact
area*

W1
Other
T
Unknown
W1
No
Both
0.080
(acres)
2g. Total Temporary Wetland Impact
0.080
2g. Total Wetland Impact
0.080
2g. Total Permanent Wetland Impact
0.000
2i. Comments:
There will be no material discharged in this wetland area. The wetland area overlaps the proposed laydown work area for stringing out the sections of
pipeline along the alignment between the French Broad River and Lyman Street (see Attachment 3: Figure 8A). Temporary matting will be used in this
area for stringing pipes and will be removed after construction. There will be no excavating and no permanent fill impacts to this wetland area.
3. Stream Impacts
3a. Reason for impact (?)
3b.Impact type*
3c. Type of impact*
3d. S. name*
3e. Stream Type*
(?)
3f. Type of
Jurisdiction*
3g. S. width
3h. Impact
length*
S1
Cofferdam
Temporary
Fill
French Broad River
Perennial
Both
260
Average (feet)
100
(linear feet)
S2
Pipe Installation — Open Cut
Excavation
Temporary
Dewatering
French Broad River
Perennial
Both
260
Average (feet)
50
(linear feet)
S3
Cofferdam
Temporary
Fill
French Broad River
Perennial
Both
260
Average (feet)
100
(linear feet)
S4
Pipe Installation — Open Cut
Excavation
Temporary
Fill
French Broad River
Perennial
Both
260
Average (feet)
50
(linear feet)
3i. Total jurisdictional ditch impact in square feet:
0
3i. Total permanent stream impacts:
0
3i. Total stream and ditch impacts:
300
3i. Total temporary stream impacts:
300
3j. Comments:
New pipelines will be installed under the river bed at two locations by open -cut trenching across the river (see Attachment 3: Figures 8A and 8B). The
impact type at both locations will involve installation of cofferdam structures, dewatering behind the cofferdam, excavation to install the pipe, backfilling
over the pipe, and returning the streambed to pre -construction elevations prior to removing the cofferdam structures. Installation of slope protection for
bank stabilization is also included as part of the Project impacts as presented in Section C.4i.
E. Impact Justification and Mitigation
1. Avoidance and Minimization
la. Specifically describe measures taken to avoid or minimize the proposed impacts in designing the project:
see Attached Supplemental Information Document
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques:
see Attached Supplemental Information Document
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
2b. If this project DOES NOT require Compensatory Mitigation, explain why:
No permanent impacts are proposed.
F. Stormwater Management and Diffuse Flow Plan (required by DWR)
1. Diffuse Flow Plan
la. Does the project include or is it adjacent to protected riparian buffers identified within one of the NC Riparian Buffer Protection Rules?
Yes No
If no, explain why:
The project is not adjacent to riparian buffers subject to NC Riparian Buffer Protection Rules
2. Stormwater Management Plan

2a. Is this a NCDOT project subject to compliance with NCDOT's Individual NPDES permit NCS000250? *
Yes No
2b. Does this project meet the requirements for low density projects as defined in 15A NCAC 02H .1003(2)?
Yes No
Comments:
The appropriate local and state NPDES construction permits will be obtained prior to initiating construction activities. Appropriate best management practices (BMPs), including erosion
and sediment control measures, good housekeeping practices/site management, proper material storage, and equipment maintenance, will also be implemented to prevent and reduce
any potential stormwater pollution as a result of the Project construction activities.
G. Supplementary Information
1. Environmental Documentation
la. Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land? *
Yes No
2. Violations (DWR Requirement)
2a. Is the site in violation of DWR Water Quality Certification Rules (15A NCAC 2H .0500), Isolated Wetland Rules (15A NCAC 2H .1300), or DWR Surface Water or Wetland Standards or
Riparian Buffer Rules (15A NCAC 2B .0200)? *
Yes No
3. Cumulative Impacts (DWR Requirement)
3a. Will this project result in additional development, which could impact nearby downstream water quality? *
Yes No
3b. If you answered "no," provide a short narrative description.
The Project is being constructed to accommodate current demands from increasing populations and regional developments, which the existing pump
station and infrastructure can no longer support adequately. Future regional growth is anticipated based on the City of Asheville development plan
"Living Asheville: A Comprehensive Plan for our Future" adopted in June 2018 and is projected with or without construction of the project. Construction
of the Project is not intended to promote additional future development growth; instead, it is being built to accommodate recent regional growth and
accommodate the anticipated 50-year growth proposed and approved by the City of Asheville development plan.
4. Sewage Disposal (DWR Requirement)
4a. Is sewage disposal required by DWR for this project? *
Yes No N/A
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or habitat?*
Yes No
5b. Have you checked with the USFWS concerning Endangered Species Act impacts?*
Yes No
5c. If yes, indicate the USFWS Field Office you have contacted.
Asheville
5d. Is another Federal agency involved? *
Yes
5e. Is this a DOT project located within Division's 1-8?
Yes No
No Unknown
5f. Will you cut any trees in order to conduct the work in waters of the U.S.?
Yes No
5g. Does this project involve bridge maintenance or removal?
Yes No
5h. Does this project involve the construction/installation of a wind turbine(s)?*
Yes No
5i. Does this project involve (1) blasting, and/or (2) other percussive activities that will be conducted by machines, such as jackhammers, mechanized pile drivers, etc.?
Yes No
5j. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat?
USFWS Information for Planning and Conservation Species List and NC Natural Heritage Program database.
6. Essential Fish Habitat (Corps Requirement)

6a. Will this project occur in or near an area designated as an Essential Fish Habitat? *
Yes No
6b. What data sources did you use to determine whether your site would impact an Essential Fish Habitat? *
National Oceanic and Atmospheric Administration (NOAA) Fisheries Essential Fish Habitat Mapper (online URL:
https//www.fish eries. noaa. gov/resource/map/essential-fish-habitat-mapper)
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 status? *
Yes No
7b. What data sources did you use to determine whether your site would impact historic or archeological resources? *
A geomorphology investigation was conducted by Seramur & Associates, PC. Additionally, a systematic Phase I archaeological survey was conducted
by TRC Environmental Corporation (TRC) and submitted to the North Carolina Department of Natural and Cultural Resources (NCDNCR) State Historic
Preservation Office (SHPO) for review. The NCDNCR-SHPO concurred that sites identified during the survey efforts by TRC were not eligible for listing
in the National Registry for Historic Places (NRHP). Please see supporting historic documentation provided in Attachment 7.
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 Project will not result in a permanent increase in the existing level of the base flood. The site for the new pump station is located within both a Zone
X and non -designated floodplain area. The proposed pipeline alginments fall within Zone AE with base flood elevation depth and within Zone AE
regulatory floodway limits of the French Broad River. Installation of the new pipelines will be underground and will return the ground surface (and
riverbed surface) to pre-existing elevations after installation and will not result in an increase of the existing base flood level. A floodplain development
permit will be submitted to the local floodplain administrator. A floodplain map (Figure 7) is included in Attachment 3.
8c. What source(s) did you use to make the floodplain determination? *
FEMA floodplain maps (online URL: https://msc.fema.gove/portal/search)
Miscellaneous
Please use the space below to attach all required documentation or any additional information you feel is helpful for application review. Documents should be combined into one file when
possible, with a Cover Letter, Table of Contents, and a Cover Sheet for each Section preferred.
Click the upload button or drag and drop files here to attach document
Pre -Construction Notification (PCN) Form_CarrierBridgePumpStation_March 29, 2023.pdf 116.94MB
File must be PDF or KMZ
Comments
Previously requested attachments are included with this PCN form and can be found in the following:
Attachment 1 — USACE Pre -Filing Meeting Request (6/24/2021), Pre -Filing Meeting Minutes w/ Alternative
Analysis PowerPoint Presentation (7/14/2021)
Attachment 2 — Completed and Signed Agent Authorization Form
Attachment 3 — Project Maps and Figures
Attachment 4 — Project Drawings and Plans
Attachment 5 — Engineering Jurisdictional Delineation Report (Three Oaks Engineering, Inc.)
Attachment 6 — USFWS Consultation Documentation
Attachment 7 — Supporting Historic Resources Documentation (TRC; Seramur & Associates, PC)
Additional pertinent project documentation can be found in the following:
Attachment 8 — Bank Stabilization Alternative Evaluation Summary Report (includes Cofferdam Type
Evaluation) (HDR I WRECO)
Attachment 9 — Hydrologic and Hydraulic Analysis Report (HDR)
Attachment 10 — Biological Assessment (includes additional survey reports and findings for mussel species
and bats evaluated within the Project limits [found in Appendix C] and a River Safety Plan
[found in Appendix F]) (HDR).
Attachment 11 — Environmental Management Plan and Environmental Corridor Review (Headwater
Geology, PLLC)
Signature
By checking the box and signing below, I certify that:
• The project proponent hereby certifies that all information contained herein is true, accurate, and complete to the best of my knowledge and belief'; and
• The project proponent hereby requests that the certifying authority review and take action on this CWA 401 certification request within the applicable reasonable period of time.
• I have given true, accurate, and complete information on this form;
I agree that submission of this PCN form is a "transaction" subject to Chapter 66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act");
I agree to conduct this transaction by electronic means pursuant to Chapter 66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act");
I understand that an electronic signature has the same legal effect and can be enforced in the same way as a written signature; AND
I intend to electronically sign and submit the PCN form.
Full Name:
Eric Mularski

Signature
ere iet3:k%
Date
3/29/2023

NORTH CAROLINA
Environmental Quality
Water Resources
Office Use Only
Corps Action ID no. SAW-2021-01395 Date received: [Click to enter.]
DWR project no. [Click enter.] Date received: Click to enter.]
Site Coordinates:
Latitude (DD.DDDDDD): 35.569798
Longitude (DD.DDDDDD): 82.565586
Form Version 4.3, April 20, 2022
Pre -Construction Notification (PCN) Form
(Ver. 4.2, January 31, 2022))
For Nationwide Permits and Regional General Permits and corresponding Water Quality Certifications
Please note: fields marked with a red asterisk are required. The form is not considered complete until all
mandatory questions are answered.
The PCN help document may be found at this link:
https://edocs. deq. nc. qov/WaterResou rces/DocView. aspx?d bid=0&id=2196924&cr=1
Please ensure you have submitted a pre -filing meeting request at least 30 days prior to submitting this
form, as DWR will not be able to accept your application without documentation of this important first step.
The Division has developed a Pre -filing Meeting Request email address 401 PreFile©ncdenr.gov to accept
the federally required pre -filing meeting request and provide confirmation receipt of submittal . This receipt
or similar documentation will satisfy 40 C.F.R. Section 121.4(a) which states "At least 30 days prior to
submitting a certification request, the project proponent shall request a pre -filing meeting with the certifying
agency." In accordance with 40 C.F.R. Section 121.5(b)(7), and (c)(5), all certification requests must
include documentation that a pre -filing meeting request was submitted to the certifying authority at least 30
days prior to submitting the certification request.
Attach documentation of Pre -Filing Meeting Request to this Application.
Date of Pre -filing Meeting Request (MM/DD/YYYY) : 7/14/2021
Page 1 of 22 PCN Form Version 4.3- April 20, 2022

A. Processing Information
County (counties) where project is located:
Buncombe Additional (if needed).
Is this a NCDMS project? *
(Click yes only if NCDMS is the applicant or co-
applicant)
❑ Yes ❑x No
Is this a public transportation project? *
(Publicly funded municipal, state, or federal road, rail,
or airport project)
❑ Yes ❑x No
Is this a NCDOT project?"
❑ Yes ❑x No
If yes, NCDOT TIP or state project number:
n/a
If yes, NCDOT WBS number: *
n/a
la. Type(s) of approval sought from the Corps: *
❑x Section 404 Permit (wetlands, streams, waters,
Clean Water Act)
❑x Section 10 Permit (navigable waters, tidal
waters, Rivers and Harbors Act)
Has this PCN previously been submitted? *
❑ Yes ❑x No
Please provide the date of the previous submission. *
n/a
1 b. What type(s) of permit(s) do you wish to seek
authorization?
❑x Nationwide Permit (NWP)
El Regional General Permit (RGP)
❑ Standard (IP)
This form may be used to initiate the standard/ individual permit process with the USACE. Please contact your Corps
representative concerning submittals for standard permits. All required items can be included as attachments and
submitted with this form.
lc. Has the NWP or GP number been verified by the Corps? *
@ Yes ❑ No
NWP number(s) (list all numbers ):
13 and 58
RGP number(s) (list all numbers ):
n/a
Are you a federal applicant?
❑ Yes ❑x No
If yes, please provide a statement concerning compliance with the Coastal Zone Management Act *
n/a
1d. Type(s) of approval sought from DWR (check all that apply):
❑ 401 Water Quality Certification — Regular ❑ 401 Water Quality Certification— Express
❑ Non-404 Jurisdictional General Permit ❑ Riparian Buffer Authorization
❑x Individual 401 Water Quality Certification
Is this a courtesy copy notification
❑ Yes ❑x No
le. Is this notification solely for the record because written approval is not required? *
For the record only for DWR 401 Certification:
❑ Yes ❑x No
For the record only for Corps Permit: *
❑ Yes ❑x No
1f. Is this an after -the -fact permit/certification application? -
❑ Yes ❑x No
Page 2 of 22
PCN Form Version 4.3- April 20, 2022

1g.
Is payment into a mitigation bank or in -lieu fee program proposed for
mitigation of impacts?
❑ Yes ❑x No
If yes, attach the acceptance letter from mitigation bank or in -lieu fee program.
1 h.
Is the project located in any of NC's twenty coastal counties? *
❑ Yes ❑x No
1 i.
Is the project located within an NC DCM Area of Environmental
Concern (AEC)? *
El Yes ❑x No El Unknown
1j.
Is the project located in a designated trout watershed? *
■ Yes ❑x No
If yes, you must attach a copy of the approval letter from the appropriate Wildlife Resource Commission Office.
Trout information may be found at this link: http://www.saw.usace.army.mil/Missions/Regulatory-Permit-
Program/Agency-Coordination/Trout.asbx
Page 3 of 22 PCN Form Version 4.3- April 20, 2022

B. Applicant Information
la.
Who is the primary contact?
MSD (POC: Darin Prosser)
1b.
Primary Contact Email: '
[e-mail]
lc.
Primary Contact Phone: * (###)###-####
[phone]
ld.
Who is applying for the permit/certification? * (check
all that apply)
„Owner El Applicant (other than owner)
le.
Is there an agent/consultant for this project?k
0 Yes ❑ No
2. Landowner Information
2a. Name(s) on Recorded Deed: *
Metropolitan Sewerage District of Buncombe
County
2b. Deed Book and Page No.:
Deed Book 5927, Page No. 1789
2c. Contact Person (for corporations):
n/a
2d. Address
Street Address:
510 Riverview Drive
Address line 2:
City:
Asheville
State/ Province/ Region:
North Carolina
Postal/ Zip Code:
28806
Country:
USA
2e. Telephone Number: * (###)###-####
828-254-9646
2f. Fax Number: (###)###-####
2g. Email Address: *
[e-mail]
3.
Applicant Information (if different from owner)
3a.
Name:
Darin Prosser
3b.
Business Name (if applicable):
Metropolitan Sewerage District (MSD) of Buncombe
County
3c.
Address: *
Street Address:
2028 Riverside Drive
Address line 2:
City:
Asheville
State/ Province/ Region:
North Carolina
Postal/ Zip Code:
28804
Country
USA
3d.
Telephone Number: * (###)###-####
828-225-8280
3e
Fax Number: (###)###-####
828-232-5537
Page 4 of 22
PCN Form Version 4.3- April 20, 2022

3f. Email Address:
[e-mail]
4. Agent/ Consultant (if applicable)
4a. Name: *
Eric Mularski
4b. Business Name:
HDR Engineering, Inc. of the Carolinas
4c. Address:
Street Address:
440 S. Church Street
Address line 2:
Suite 1200
City:
Charlotte
State/ Province/ Region:
North Carolina
Postal/ Zip Code:
28105
Country:
USA
4d. Telephone Number: (###)###-####
[phone]
4e Fax Number: (###)###-####
4f. Email Address: s
[e-mail]
Agent Authorization Letter:*
Attach a completed/signed agent authorization form or letter. A sample form may be found at this link:
httbs://www.saw.usace.armv.mil/Missions/Regulatory-Permit-Program/Permits/2017-Nationwide-Permits/Pre-
construction-Notification/
Page 5 of 22 PCN Form Version 4.3- April 20, 2022

C. Project Information and Prior Project History
1.
Project Information
la.
Name of project: *
Carrier Bridge Pump Station Replacement Project
lb.
Subdivision name (if appropriate):
n/a
lc.
Nearest municipality/town: *
Asheville
2.
Project Identification
2a.
Property identification number (tax PIN or parcel ID):
PIN# 963891989100000 (Project crosses multiple
parcels, see Attached Supplemental Information
Document and Attachment 3: Figure 6)
2b.
Property size (in acres):
Phase 1 = 5,623.1 acres for total Project area; Phase 2
property size to be determined following final selection
of the preferred alignment (Phase 2 proposed for
construction in 2035).
2c.
Project Address:
Street Address:
510 Riverview Drive
Address line 2:
City:
Asheville
State/ Province/ Region:
North Carolina
Postal/ Zip Code:
28806
Country:
USA
2d.
Site coordinates in decimal degrees (using 4-6 digits
after the decimal point): *
Latitude (DD.DDDDDD): * 35.569798
Longitude (-DD.DDDDDD): *-82.565586
3.
Surface Waters
3a.
Name of nearest body of water to proposed project:
French Broad River
3b.
Water Resources Classification of nearest receiving
water:
B
The Surface Water Classification map may be found at this link:
https://ncden r. ma ps.arcq is. com/apes/webappviewer/index. html? id=6e 125ad 7628f494694e259c80dd64265
3c.
In what river basin(s) is your project located?*
French Broad
Choose additional (if needed)
3d.
Please provide the 12-digit HUC in which the project is
located: *
060101050705, 060101050901
The Find Your HUC map may be found at this link:
https://ncdenr.maps.arcgis.com/apps/Publiclnformation/index.html?appid=ad3a85a0c6d644a0b97cd069db238ac3
Page 6 of 22
PCN Form Version 4.3- April 20, 2022

4. Project Description and History
4a. 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 site is located adjacent to the French Broad River in Asheville, NC (Attachment 3; Figure 1). The
Project begins at the existing Carrier Bridge Pump Station, which serves as part of the region's sanitary
sewer/wastewater collection system and is classified as industrial land use. The Project areas transverse the
French Broad River Park, Carrier Park, the Asheville Greenway — French Broad River East Bank Corridor, and
the French Broad River, all four of which are used for public recreation. The Project also transverses a portion of
the Biltmore Estate where land is being used for agricultural crops. Land use north and west of the Project areas
is primarily residential with some commercial uses mixed in. Land use east of the Project areas are primarily
industrial and commercial. South of the Project areas is the Biltmore Estate, which has a mixture of agricultural,
recreational, tourism, and undeveloped land uses.
4b. Have Corps permits or DWR certifications been obtained for this
project (including all prior phases) in the past?
El Yes ❑x No El Unknown
If yes, please give the DWR Certification number and/or Corps
Action ID (ex. SAW-0000-00000):
SAW-2021-01395
Allgood, Crystal
Attach any pertinent project history documentation
4b2. Is any portion of the work already complete?
❑ Yes ❑x No
If yes, describe the completed work.
n/a
4c. List of other certifications or approvals/denials received from other federal, state or local agencies for work
described in this application not related to the 404 or 401.
No other approvals/denials received to date; however, MSD will apply for the appropriate state and city
stormwater permits prior to initiating construction activities.
4d. Attach an 8% x 11" excerpt from the most recent version of the USGS topographic map indicating the location of
the project site.
4e. Attach an 8% x 11" excerpt from the most recent version of the published County NRCS Soil Survey map
depicting the project site.
4f. List the total estimated acreage of all existing wetlands on the
property:
0.14 (Phase 1) and 0.99 (future
phase) acres
4g. List the total estimated linear feet of all existing streams (intermittent
and perennial) on the property:
3,455.37 (Phase 1) and 1,494
(future phase) linear feet
4g1. List the total estimated acreage of all existing open waters on the
property:
0 acres
4h. Explain the purpose of the proposed project: *
See Attached Supplemental Information Document
4i. Describe the overall project in detail, including the type of equipment to be used: *
See Attached Supplemental Information Document
4j. Attach project drawings/site diagrams/depictions of impact areas for the proposed project.
4k. Will this activity involve dredging in wetlands or waters?
■ Yes ❑x No
If yes, describe the type of dredging, the composition of the dredged material, and the locations of disposal area.
n/a
Page 7 of 22
PCN Form Version 4.3- April 20, 2022

5. Jurisdictional Determinations
5a. Have the wetlands or streams been delineated on the property or in
proposed impact areas?
Yes ❑ No El Unknown
Comments:
Delineation efforts were originally conducted by Three Oaks Engineering, Inc. on December 29, 2021 for the
initial study area. HDR revisited the site to assess additional areas on the east side of the French Broad River
along Lyman Street. Additional delineated limits were projected in 2023 based on the initial 2021 delineation
surveys to reflect Project alignment changes. Subsequent delineation efforts have not been conducted to confirm
the projected delineation limits (see Attachment 3: Figure 5).
5b. If the Corps made a jurisdictional determination,
what type of determination was made?
❑ Preliminary ❑ Approved ❑ Emailed concurrence
0 Not Verified ❑ Unknown ❑ n/a
Corps AID number (ex. SAW-0000-00000):
5c. If 5a is yes, who delineated the jurisdictional
areas?
Name (if known): Nathan Howell, PWS
Agency/Consultant Company: Three Oaks Engineering, Inc.
Other: Eric Mularski, PWS — HDR Engineering, Inc. of the
Carolinas
5d. List the dates of the Corps jurisdictional determination or State determination if a determination was made by
either agency.
Preliminary Jurisdictional Determination Package submitted as part of this 404 Pre -Construction Notification
(Attachement 5).
5d1. Attach jurisdictional determinations.
6.
Future Project Plans
6a.
Is this a phased project?
1Z Yes ❑ No
6b.
If yes, explain.
The Project, as outlined under Item 4i, will be conducted concurrently over the proposed schedule to begin in the Fall
of 2024 and be completed by the Fall of 2027 (3-year construction period). However, the Project includes installing a
proposed 60-inch gravity sewer interceptor pipe across the French Broad River and is intended for the future extension
of a 60-inch gravity sewer interceptor pipeline proposed to be constructed in 2035 to replace an existing smaller
diameter pipe and accommodate increased wastewater flow projections.
Are any other NWP(s), regional general permit(s), or individual permit(s) used, or intended to be used, to
authorize any part of the proposed project or related activity? This includes other separate and distant crossings
for linear projects that require Department of the Army authorization but don't require pre -construction
notification.
Yes, MSD anticipates obtaining an NWP 58 prior to initiating construction for the proposed 60-inch gravity sewer
interceptor pipe extension slated for the year 2035 once final alignment can be determined, funding secured, and
potential impacts to any wetland(s) or waterway(s) can be determined.
7. Addresses of adjoining property owners, lessees, etc. whose property adjoins the waterbody (if more than can be
entered here, please attach a supplemental list)
see Attached Supplemental Information Document
Page 8 of 22 PCN Form Version 4.3- April 20, 2022

8. Scheduling of activity:
Project construction activities are proposed to begin in February 2024 following approval of the necessary
USACE permit(s). MSD anticipates Project construction will be completed within 36 months and the new CBPS
will be in operation by February 2027. Construction activities for the new CBPS will be conducted concurrently
with construction activities for the proposed 36-inch-diameter force mains, the proposed 60-inch-diameter gravity
sewer pipe, and replacement (rehabilitation) of the existing 48-inch-diameter/54-inch-diameter sections of gravity
sewer with 60-inch-diameter diameter pipe. The proposed North River Crossing (36-inch-diameter force mains)
will be completed within 6 months with both stages to cross the river being completed within 3 months. The
proposed South River Crossing (60-inch-diameter gravity sewer pipe) will also be completed within 6 months with
both stages to cross the river requiring 3 months to complete. In total, construction activities to cross the French
Broad River at the two proposed crossings will take approximately 12 months and will be completed within the
proposed 36-month planned work schedule.
Construction activities will be limited to the hours between 7:00am and 7:OOpm Monday through Saturday in
accordance with the City of Asheville Noise Ordinance (Ordinance No. 4390). MSD will be required to obtain a
city permit for any construction activities performed after 7:OOpm or before 7:00am, and for any activities
performed on Sunday between the hours of 12:00am and 11:59pm. MSD will abide by the city noise ordinance
and ensure all construction equipment is operating in accordance with the manufacturer's specifications and all
standard sound -reducing equipment is in place and in proper condition.
Page 9 of 22 PCN Form Version 4.3- April 20, 2022

D. Proposed Impacts Inventory
1. Impacts Summary
la. Where are the impacts associated with your project
(check all that apply):
O Wetlands
❑ Buffers
❑ Pond Construction
O Streams - tributaries
❑ Open Waters
2. Wetland Impacts
If there are wetland impacts proposed on the site, complete this table for each wetland area impacted.
2a.
Site #
2a1.
Impact
Reason/Type*
2b.
Impact
Duration*
2c.
Wetland Type
2d.
Wetland Name*
2e.
Forested
?*
2f.
Jurisdiction
Type
2g.
Impact Area
(ac)*
W1
Other
Temporary
Unknown
W1
No
Both
0.08
W2
Choose one
-"emp/ Perm
Choose one
Click to enter
Y/ia
Choose one
Click to enter
W3
Choose one
-emp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W4
Choose one
Temp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W5
Choose one
Temp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W6
Choose one
-emp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W7
Choose one
-emp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W8
Choose one
-emp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W9
Choose one
-emp/ Perm
Choose one
Click to enter
YIN
Choose one
Click to enter
W10
Choose one
Temp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W11
Choose one
Temp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W12
Choose one
Temp/ Perm
Choose onE
Click to enter
Y/N
Choose one
Click to enter
W13
Choose one
Temp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W14
Choose one
Temp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
W15
Choose one
Temp/ Perm
Choose one
Click to enter
Y/N
Choose one
Click to enter
2g1. Total temporary wetland impacts
0.08 ac
2g2. Total permanent wetland impacts
0.0 ac
2g3. Total wetland impacts
0.08 ac
2h. Type(s) of material being discharged and the amount of each type in cubic yards:
There will be no material discharged in this wetland area. The wetland area overlaps the proposed laydown work
area for stringing out the sections of pipeline. Temporary matting will be used in this area for stringing pipes and
will be removed after construction. There will be no excavating and no permanent fill impacts to this wetland area.
2i. Comments:
2a1 — Other: impact reason/type is for laydown work area needed to string out the new pipe for installation along
the alignment between the French Broad River and Lyman Street (see Attachment 3: Figure 8A).
Page 10 of 22
PCN Form Version 4.3- April 20, 2022

3. Stream Impacts
If there are perennial or intermittent stream/ tributary impacts (including temporary impacts) proposed on the site,
complete this table for all stream/ tributary sites impacted.
** All Perennial or Intermittent streams must be verified by DWR or delegated local government
Site #*
3a
Impact
Reason*
3b.
Impact
Duration
3c.
Impact Type*
3d.
Stream Name*
3e.
Stream
Type'
3f.
Jurisdiction
Type
3g.
Stream Width
(avg ft)
3h.
Impact length
(linear ft) *
S1
Cofferdam
Temporary
Fill (Incl.
Riprap)
French Broad
River
Perennial
Both
260
100
S2
Pipe
Installation —
Open Cut
Excavation
Temporary
Dewatering
French Broad
River
Perennial
Both
260
50
S3
Cofferdam
Temporary
Fill (Incl.
Riprap)
French Broad
River
Perennial
Both
230
100
S4
Pipe
Installation —
Open Cut
Excavation
Temporary
Dewatering
French Broad
River
Perennial
Both
230
50
S5
,'lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S6
:`,lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S7
` lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S8
lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S9
lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S10
;lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S11lick
to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S12
,lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S13
;;lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S14
;;lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S15
`;lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S16
;lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S17:lick
to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S18
lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S19
lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
S20
lick to enter
Temp/ Perm
Choose one
Click to enter
Per/Int
Choose one
Click to enter
Click to enter
3i1. Total jurisdictional ditch
impact:
0 linear ft
3i2. Total permanent stream
impacts:
0 linear ft
3i3. Total temporary stream
impacts:
300 linear ft
3i4. Total stream and ditch
impacts:
300 linear ft
Page 11 of 22
PCN Form Version 4.3- April 20, 2022

3j. Comments:
New pipelines will be installed under the river bed at two locations by open -cut trenching across the river (see
Attachment 3: Figures 8A and 8B). The impact type at both locations will involve installation of cofferdam
structures, dewatering behind the cofferdam, excavation to install the pipe, backfilling over the pipe, and
returning the streambed to pre -construction elevations prior to removing the cofferdam structures. Installation of
slope protection for bank stabilization is also included as part of the Project impacts as presented in Section C.4i.
Page 12 of 22 PCN Form Version 4.3- April 20, 2022

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., individually list all open water impacts in the table below.
4a.
Site #*
4a1.
Impact Reason
4b.
Impact
Duration*
4c.
Waterbody Name*
4d.
Activity Type*
4e.
Waterbody
Type*
4f.
Impact area
(ac)
01
Click to enter.
Temp/ Perm
Click to enter.
Choose one
Choose one
Click to enter.
02
Click to enter.
Temp/ Perm
Click to enter.
Choose one
Choose one
Click to enter.
03
Click to enter.
Temp/ Perm
Click to enter.
Choose one
Choose one
Click to enter.
04
Click to enter.
Temp/ Perm
Click to enter.
Choose one
Choose one
Click to enter.
05
Click to enter.
Temp/ Perm
Click to enter.
Choose one
Choose one
Click to enter.
4g. Total temporary open water impacts
Click to enter. ac
4g. Total permanent open water impacts
Click to enter. ac
4g. Total open water impacts
Click to enter. ac
4h. Comments:
Open water impacts do not apply to this project.
5. Pond or Lake Construction
If pond or lake construction is proposed, complete the table below. (*This does NOT include offline stormwater
management ponds.)
5a.
Pond ID
#
5b.
Proposed use or
purpose of pond
5c.
Wetland Impacts (ac)
5d.
Stream Impacts (ft)
5e.
Upland
Impacts (ac)
Flooded
Filled
Excavated
Flooded
Filled
Excavated
P1
Choose one
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
P2
Choose one
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
P3
Choose one
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
5f. Total
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
Click to
enter.
5g. Comments:
Pond and lake impacts do not apply to this project.
5h. Is a dam high hazard permit required?
❑ Yes ❑ No
If yes, permit ID no.:
Click to enter.
5i. Expected pond surface area (acres):
Click to enter.
5j. Size of pond watershed (acres):
Click to enter.
5k. Method of construction:
n/a
Page 13 of 22
PCN Form Version 4.3- April 20, 2022

6. Buffer Impacts (DWR requirement)
If project will impact a protected riparian buffer, then complete the chart below. Individually list all buffer impacts.
6a. Project is in which protected basin(s)?
(Check all that apply.)
❑ Neuse ❑ Tar -Pamlico ❑ Catawba
❑ Jordan ❑ Goose Creek ❑ Randleman
❑ Other: Click to enter.
Site #*
6b.
Impact Type*
6c.
Impact Duration*
6d.
Stream Name*
6e.
Buffer
Mitigation
Required?*
6f.
Zone 1 Impact*
(sq ft)
6g.
Zone 2 Impact*
(sq ft)
B1
Choose one
Temp/ P-_,
Click to enter.
Y/N
Click to enter.
Click to ente
B2
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to ente
B3
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B4
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B5
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B6
Choose one
;emp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B7
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B8
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter
Click to enter.
B9
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter
Click to enter.
B10
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B11
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter
Click to enter.
B12
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B13
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter
Click to enter.
B14
Choose one
Temp/ Perm
lick to enter.
Y/N
Click to enter.
Click to enter.
B15
Choose one
temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B16
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter
Click to enter.
B17
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter
Click to enter.
B18
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B19
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter.
Click to enter.
B20
Choose one
Temp/ Perm
Click to enter.
Y/N
Click to enter
Click to enter.
6h. Total temporary impacts:
Zone 1: Click to e sq ft
Zone 2: Click to enter. sq ft
6h. Total permanent impacts:
Zone 1: Click to enter sq ft
Zone 2: Click to enter. sq ft
6h. Total combined buffer impacts:
Zone 1: Click to enter sq ft
Zone 2: Click to enter. sq ft
6i. Comments:
Buffer impacts do not apply to this Project.
Please attach supporting documentation (impact maps, plan sheets, etc.) for the proposed project.
Page 14 of 22 PCN Form Version 4.3- April 20, 2022

E. Impact Justification and Mitigation
1.
Avoidance and Minimization
la.
Specifically describe measures taken to avoid or minimize the proposed impacts through project design:
see Attached Supplemental Information Document
1 b.
Specifically describe measures taken to avoid or minimize proposed impacts through construction techniques:
see Attached Supplemental Information Document
2. Compensatory Mitigation for Impacts to Waters of the U.S., Waters of the State, or Riparian Buffers
2a. If compensatory mitigation is required, by whom is it required?
(check all that apply)
❑ DWR ❑ Corps
2b. If yes, which mitigation option(s) will be used for this
project? (check all that apply)
❑ Mitigation Bank
❑ In Lieu Fee Program
❑ Permittee Responsible Mitigation
3. Complete if using a Mitigation Bank (Must satisfy NC General Statute143-214.11 (d1).)
3a. Name of mitigation bank:
n/a
3b. Credits purchased/requested:
Type: Choose one
Quantity Click to enter.
Type: Choose one
Quantity Click to enter.
Type: Choose one
Quantity Click to enter.
Attach receipt and/or approval letter.
3c. Comments:
Compensatory mitigation and mitigation banking are not proposed for this Project.
4. Complete if Using an In Lieu Fee Program
4a. Attach approval letter from in lieu fee program.
4b. Stream mitigation requested:
Click to enter. linear feet
4c. If using stream mitigation, what is the stream temperature:
Choose one
NC Stream Temperature Classification Maps can be found under the Mitigation Concepts tab on the Wilmington
District's RIBITS website: (Please use the filter and select Wilmington district)
https://ribits.usace.armv.mil/ribits apex/f?p=107:27:2734709611497::NO:RP:P27 BUTTON KEY:0
4d. Buffer mitigation requested (DWR only):
Click to enter. square feet
4e. Riparian wetland mitigation requested:
Click to enter. acres
4f. Non -riparian wetland mitigation requested:
Click to enter. acres
4g. Coastal (tidal) wetland mitigation requested:
Click to enter. acres
4h. Comments:
Payment to an In Lieu Fee Program is not proposed for this Project.
Page 15 of 22
PCN Form Version 4.3- April 20, 2022

5. Complete if Providing a Permittee Responsible Mitigation Plan
5a. If proposing a permittee responsible mitigation plan, provide a description of the proposed mitigation plan,
including mitigation credits generated.
n/a
5b. Attach mitigation plan/documentation.
6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — DWR requirement
6a. Will the project result in an impact within a protected riparian buffer
that requires buffer mitigation?
El Yes ❑x No
If yes, please complete this entire section — please contact DWR for more information.
6b. If yes, identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required in the table below.
Zone
6c.
Reason for impact
6d.
Total impact
(square feet)
Multiplier
6e.
Required mitigation
(square feet)
Zone 1
Click to enter.
Click to enter.
Choose one
Click to enter.
Zone 2
Click to enter.
Click to enter.
Choose one
-slick to enter.
6f. Total buffer mitigation required
Click to enter.
6g. If buffer mitigation is required, is payment to a mitigation bank or
NC Division of Mitigation Services proposed?
El Yes ❑x No
6h. If yes, attach the acceptance letter from the mitigation bank or NC Division of Mitigation Services.
6i. Comments:
Buffer mitigation is not proposed as part of this Project.
Page 16 of 22 PCN Form Version 4.3- April 20, 2022

F. Stormwater Management and Diffuse Flow Plan (DWR requirement)
1.
Diffuse Flow Plan
la.
Does the project include or is it adjacent to protected riparian buffers
identified within one of the NC Riparian Buffer Protection Rules?
❑ Yes ❑x No
1 b.
All buffer impacts and high ground impacts require diffuse flow or other form of stormwater treatment. If the
project is subject to a state implemented riparian buffer protection program, include a plan that fully documents
how diffuse/dispersed flow will be maintained.
All Stormwater Control Measures (SCM) must be designed in accordance with the NC Stormwater Design
Manual(https://deq.nc.gov/about/divisions/energy-mineral-land-resources/energy-mineral-land-permit-
quidance/stormwater-bmp-manual).
Associated supplement forms and other documentation must be provided.
What Type of SCM are you
providing?
(Check all that apply)
❑ Level Spreader
El Vegetated Conveyance (lower seasonal high water table- SHVVT)
❑ Wetland Swale (higher SHVVT)
❑ Other SCM that removes minimum 30% nitrogen
❑ Proposed project will not create concentrated stormwater flow through the
buffer
For a list of options to meet the diffuse flow requirements, click here.
Attach diffuse flow documentation.
2.
Stormwater Management Plan
2a.
Is this an NCDOT project subject to compliance with NCDOT's
Individual NPDES permit NCS000250?
El Yes ❑x No
2b.
Does this project meet the requirements for low density projects as
defined in 15A NCAC 02H .1003(2)?*
❑x Yes El No
To look up low density requirements, click here:
http://reports.oah.state.nc. us/ncac/title%2015a%20-%20environmental%20quality/chapter%2002%20-
%20environ mental%20management/su bchapter%20h/15a%20ncac%2002h%20.1003.pdf
2c.
Does this project have a stormwater management plan (SMP)
reviewed and approved under a state stormwater program or state -
approved local government stormwater program? *
❑x Yes ❑ No
❑ n/a — project disturbs < 1 acre
Note: Projects that have vested rights, exemptions, or grandfathering from state or locally implemented
stormwater programs or projects that satisfy state or locally -implemented stormwater programs through use of
community in -lieu programs should answer "no" to this question.
2d.
Which of the following stormwater management program(s) apply?
(Check all that apply.)*
0 Local Government
0 State
If you have local government approval, please include the SMP on their overall impact map.
Local Government Stormwater Programs
0 Phase II El USMP
❑ NSW ❑ Water Supply
Page 17 of 22
PCN Form Version 4.3- April 20, 2022

Please identify which local government stormwater program you are using.
City of Asheville NPDES Permitted Phase II MS4
State Stormwater Programs
❑x Phase II ❑ HOW or ORW
❑ Coastal Counties ❑ Other
Comments:
The appropriate local and state NPDES construction permits will be obtained prior to initiating construction
activities. Appropriate best management practices (BMPs), including erosion and sediment control measures,
good housekeeping practices/site management, proper material storage, and equipment maintenance, will be
also be implemented to prevent and reduce any potential stormwater pollution as a result of the Project
construction activities.
Page 18 of 22 PCN Form Version 4.3- April 20, 2022

G. Supplementary Information
1.
Environmental Documentation
la.
Does the project involve an expenditure of public (federal/state/local)
funds or the use of public (federal/state) land?
El Yes ❑x No
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 (North Carolina) Environmental
Policy Act (NEPA/SEPA)? *
El Yes El No
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:
The proposed project activities would be funded through MSD's Capitol Improvements Plan.
2.
Violations (DWR Requirement)
2a.
Is the site in violation of DWR Water Quality Certification Rules (15A
NCAC 2H .0500), Isolated Wetland Rules (15A NCAC 2H .1300),
Federally Non -Jurisdictional Wetlands /Classified Surface Waters
(15A NCAC 2H. 1400) DWR Surface Water or Wetland Standards or
Riparian Buffer Rules (15A NCAC 2B .0200)?
❑ Yes
0 No
2b.
If you answered "yes" to the above question, provide an explanation of the violation(s):
n/a
3.
Cumulative Impacts (DWR Requirement)
3a.
Will this project (based on past and reasonably anticipated future
impacts) result in additional development, which could impact nearby
downstream water quality?
• Yes 0 No
3b.
If you answered "no", provide a short narrative description:
The Project is being constructed to accommodate current demands from increasing populations and regional
developments, which the existing pump station and infrastructure can no longer support adequately. Future
regional growth is anticipated based on the City of Asheville development plan "Living Asheville: A
Comprehensive Plan for our Future" adopted in June 2018 and is projected with or without construction of the
project. Construction of the Project is not intended to promote additional future development growth; instead, it is
being built to accommodate recent regional growth and accomodate the anticipated 50-year growth proposed
and approved by the City of Asheville development plan.
3c.
If yes, provide a qualitative or quantitative cumulative impact analysis in accordance with the most recent DWR
policy. (Attach .pdf)
4. Sewage Disposal (DWR Requirement)
4a. Is sewage disposal required by DWR for this project?*
❑ Yes ❑x No ❑ N/A
Page 19 of 22
PCN Form Version 4.3- April 20, 2022

4b. If yes, describe in detail the treatment methods and dispositions (non -discharge or discharge) of wastewater
generated from the proposed project. If the wastewater will be treated at a treatment plant, list the capacity
available at that plant.
n/a
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected
species or habitat? (IPAC weblink: https://www.fws.gov/ipac/ [fws.govl) *
0 Yes ❑ No
5b. Have you checked with the USFWS concerning Endangered Species
Act impacts? *
„ Yes ❑ No
5c. If yes, indicate the USFWS Field Office you have contacted.
Asheville
5d. Is another federal agency involved?
❑ Yes ❑x No ❑ Unknown
If yes, which federal agency?
n/a
5e. Is this a DOT project located within Divisions 1-8? *
❑ Yes ❑x No
5f. Will you cut any trees in order to conduct the work in waters of the
U.S.?
„Yes El No
5g. Does this project involve bridge maintenance or removal? *
❑ Yes ❑x No
5g1. If yes, have you inspected the bridge for signs of bat use such as
staining, guano, bats, etc.? Representative photos of signs of bat use
can be found in the NLEB SLOPES, Appendix F, pages 3-7.
❑x Yes ❑ No
Representative photos of signs of bat use can be found in the NLEB SLOPES, Appendix F, pages 3-7. Link to
NLEB SLOPES document: http://saw-req.usace.armv.mil/NLEB/1-30-17-signed NLEB-SLOPES&apps.pdf
If you answered yes to 5g1, did you discover any signs of bat use? *
❑ Yes ❑x No ❑ Unknown
If yes, please show the location of the bridge on the permit drawings/ project plans
5h. Does this project involve the construction/ installation of a wind
turbine(s)?
El Yes ❑x No
If yes, please show the location of the wind turbine(s) on the permit drawings/ project plans (attach .pdf)
5i. Does this project involve blasting and /or other percussive activities
that will be conducted by machines, such as jackhammers,
mechanized pile drivers, etc.? *
0 Yes ❑ No
If yes, please provide details to include type of percussive activity, purpose, duration, and specific location of this
activity on the property (attach .pdf)
5j. What data sources did you use to determine whether your site would impact Endangered Species or Designated
Critical Habitat? *
USFWS Information for Planning and Conservation Species List and NC Natural Heritage Program database.
Attach consultation documentation.
6. Essential Fish Habitat (Corps Requirement)
Page 20 of 22
PCN Form Version 4.3- April 20, 2022

6a.
Will this project occur in or near an area designated as
an Essential Fish Habitat? *
El Yes ❑x No
Is there submerged aquatic vegetation (SAV) around
the project vicinity? *
El Yes ❑x No El Unknown
Will this project affect submerged aquatic vegetation?
❑ Yes ❑x No ❑ Unknown
Explain: n/a
6b.
What data source(s) did you use to determine whether your site would impact Essential Fish Habitat? *
National Oceanic and Atmospheric Administration (NOAA) Fisheries Essential Fish Habitat Mapper (online URL:
https//www.fisheries. noaa.gov/resource/map/essential-fish-habitat-ma pper)
7.
Historic or Prehistoric Cultural Resources (Corps Requirement)
Link to the State Historic Preservation Office Historic Properties Map (does not include archaeological data):
http://gis.ncdcr.gov/hpoweb/
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 status (e.g., National Historic Trust designation or
properties significant in North Carolina history and archaeology)?
El Yes ❑x No
7b.
What data source(s) did you use to determine whether your site would impact historic or archeological
resources? *
A geomorphology investigation was conducted by Seramur & Associates, PC. Additionally, a systematic Phase I
archaeological survey was conducted by TRC Environmental Corporation (TRC) and submitted to the North
Carolina Department of Natural and Cultural Resources (NCDNCR) State Historic Preservation Office (SHPO)
for review. The NCDNCR-SHPO concurred that sites idendified during the survey efforts by TRC were not
eligible for listing in the National Registry for Historic Places (NRHP). Please see supporting historic
documentation provided in Attachment 7.
7c.
Attach historic or prehistoric documentation.
8.
Flood Zone Designation (Corps Requirement)
Link to the FEMA Floodplain Maps: https://msc.fema.gov/portal/search
8a.
Will this project occur in a FEMA-designated 100-year floodplain? *
1Z Yes ❑ No
8b.
If yes, explain how the project meets FEMA requirements.
The Project will not result in a permanent increase in the existing level of the base flood. The site for the new
pump station is located within both a Zone X and non -designated floodplain area. The proposed pipeline
alginments fall within Zone AE with base flood elevation depth and within Zone AE regulatory floodway limits of
the French Broad River. Installation of the new pipelines will be underground and will return the ground surface
(and riverbed surface) to pre-existing elevations after installation and will not result in an increase of the existing
base flood level. A floodplain development permit will be submitted to the local floodplain administrator. A
floodplain map (Figure 7) is included in Attachment 3 .
8c.
What source(s) did you use to make the floodplain determination?
FEMA floodplain maps (online URL: https://msc.fema.gove/portal/search)
Page 21 of 22 PCN Form Version 4.3- April 20, 2022

H. Miscellaneous
Comments:
Previously requested
Attachment 1
Attachment 2
Attachment 3
Attachment 4
Attachment 5
Attachment 6
Attachment 7
attachments are included with this PCN form and can be found in the following:
— USACE Pre -Filing Meeting Request (6/24/2021), Pre -Filing Meeting Minutes w/ Alternative
Analysis PowerPoint Presentation (7/14/2021)
— Completed and Signed Agent Authorization Form
— Project Maps and Figures
— Project Drawings and Plans
— Engineering Jurisdictional Delineation Report (Three Oaks Engineering, Inc.)
— USFWS Consultation Documentaiton
— Supporting Historic Resources Documentation (TRC; Seramur & Associates, PC)
Additional pertinent project documentation can be found in the following:
Attachment 8 — Bank Stabilization Alternative Evaluation Summary Report (includes Cofferdam Type
Evaluation) (HDR I WRECO)
Attachment 9 — Hydrologic and Hydraulic Analysis Report (HDR)
Attachment 10 — Biological Assessment (includes additional survey reports and findings for mussel species
and bats evaluated within the Project limits [found in Appendix C] and a River Safety Plan
[found in Appendix F]) (HDR).
Attachment 11 — Environmental Management Plan and Environmental Corridor Review (Headwater
Geology, PLLC)
Attach pertinent documentation or attachments not previously requested
I. Signature *
❑x By checking the box and signing below, I, as the project proponent, certify to the following:
• The project proponent hereby certifies that all information contained herein is true, accurate, and complete, to
the best of my knowledge and belief;
• The project proponent hereby requests that the certifying authority review and take action on this CWA 401
certification request within the applicable reasonable period of time;
• The project proponent hereby agrees that submission of this PCN form is a "transaction" subject to Chapter
66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act");
• The project proponent hereby agrees to conduct this transaction by electronic means pursuant to Chapter 66,
Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act");
• The project proponent hereby understands that an electronic signature has the same legal effect and can be
enforced in the same way as a written signature; AND
• As the project proponent, I intend to electronically sign and submit the PCN/online form.
Full Name: * Darin Prosser
Signature: * Click to enter.
Date: % Click to enter.
Page 22 of 22 PCN Form Version 4.3- April 20, 2022

Metropolitan Sewerage District of Buncombe County
Carrier Bridge Pump Station Replacement Project
404/401 Pre -Construction Notification (PCN) Supplemental Information
Attachments to the PCN Form
1. USACE Pre -Filing Meeting
o Pre -Filing Meeting Request (6/24/2021)
o Pre -Filing Meeting Minutes (7/14/2021)
o Alternative Analysis PowerPoint Presentation
2. Completed and Signed Agent Authorization Form
3. Project Maps and Figures
o Figure 1 — Project Location Map
o Figure 2 — USGS Topographic Quadrangle
o Figure 3 — Existing and Proposed Facility Map
o Figure 4 — NRCS Soil Map
o Figure 5 — Waters and Wetland Resources
o Figure 6 — Property Owners
o Figure 7 — FEMA Flood Zones
o Figure 8 — Potential Impacts to Waters of the U.S.
4. Project Drawings and Plans
5. Jurisdictional Delineation Report (Three Oaks Engineering, Inc.)
6. USFWS Consultation Documentation
7. Supporting Historic Resources Documentation (TRC; Seramur & Associates, PC)
8. Bank Stabilization Alternative Evaluation Summary Report (includes Cofferdam Type Evaluation)
(HDR I WRECO)
9. Hydrologic and Hydraulic Analysis Report (HDR)
10. Biological Assessment (HDR)
o Habitat Survey and Presence/Absence Survey Reports (provided in Appendix C of the
Biological Assessment)
o River Safety Plan (provided in Appendix F of the Biological Assessment)
11. Environmental Management Plan and Environmental Corridor Review (Headwater Geology,
PLLC)
C. Project Information and Prior History
2. Project Identification
Additional Properties Transversed by the Project (see Figure 6 in Attachment 3 for Map ID
locations)
Map ID #
2a. Property identification
number (tax PIN or parcel
ID)
2b. Property size (in
acres)
2c. Project Address
(Street, City, State, Zip Code,
Country)
Western Project Limits & Access Route
1
PIN# 963647977000000
3,067 acres
578 Sheep Farm Road
Asheville, North Carolina, 28806, USA
6
PIN# 963794403000000
2,485.3 acres
153 Old Ridge Road
Asheville, North Carolina, 28803, USA
10
PIN# 963840222900000
2.289 acres
225 Amboy Road
Asheville, North Carolina, 28806, USA
11
PIN# 963840625100000
5.860 acres
99999 Amboy Road
Asheville, North Carolina, 28806, USA
Page 1 of 10

Map ID #
2a. Property identification
number (tax PIN or parcel
ID)
2b. Property size (in
acres)
2c. Project Address
(Street, City, State, Zip Code,
Country)
Eastern Project Limits
18
PIN# 963891838700000
2.019 acres
510 Riverview Drive
Asheville, North Carolina, 28806, USA
19
PIN# 963891989100000
13.89 acres
508 Riverview Drive
Asheville, North Carolina, 28806, USA
20
PIN# 963892348500000
46.119 acres
98 Desota Street
Asheville, North Carolina, 28806, USA
26
PIN# 964800183200000
0.69 acres
99999 Amboy Road
Asheville, North Carolina, 28806, USA
27
PIN# 964800295000000
0.04 acres
99999 Amboy Road
Asheville, North Carolina, 28806, USA
Property Size Total
5,623.21 acres
4. Project Description and History
4h. Explain the purpose of the proposed project
The Metropolitan Sewerage District of Buncombe County (MSD) owns and operates over
1,100 miles of collection systems, 40 pump stations, and the French Broad River Water
Reclamation Facility. MSD has a permitting capacity of 40 million gallons per day (mgd) and
provides wastewater collection and treatment services to over 170,000 customers in the region.
To meet the demands from increasing populations and regional developments, MSD must
improve their existing infrastructure to meet public needs, including adding new pump stations
and pipelines as growth continues within the region.
MSD is currently proposing to upsize their existing wastewater infrastructure with the
Carrier Bridge Pump Station (CBPS) Replacement Project (Project) located in Asheville, North
Carolina, to accommodate the new growth within the existing service area (Attachment 3: Figures
1 and 2). The Project includes the construction of a new pump station (PS), replacement of the
existing influent gravity sewer, and replacement of exiting force main. Pipe installation of the
influent gravity sewer and force main will be completed using the open -cut dry ditch method. The
proposed Project will address bottlenecking that is currently occurring at the Biltmore Estate
property on the south side of the French Broad River.
The existing Carrier Bridge Pump Station (CBPS) was originally constructed in 1966 and
is MSD's largest operating PS. The CBPS conveys flow from the southern and western areas of
Buncombe County and northern parts of Henderson County, and discharges those flows to the
54-inch-diameter French Broad Interceptor located east of the CBPS and French Broad River.
The interceptor flows by gravity along the French Broad River to the French Broad River Water
Reclamation Facility (WRF). The existing CBPS has three centrifugal solids handling pumps that
together provide a current firm capacity of 22.6 mgd. The existing 24-inch-diameter ductile iron
pipe (DIP) force main is approximately 770 feet (ft) in length with approximately 250 linear ft
crossing the French Broad River.
To convey future flow to the WRF, MSD seeks to replace the existing 22.6 mgd PS with a
new 34 mgd PS and force main, designed for future expansion up to 50 mgd. The new PS will
accommodate current and future flows for the next 50 years.
4i. Describe the overall project in detail, including the type of equipment to be used.
The following paragraphs describe the individual construction activities associated with
the proposed Project. Referenced figures can be found in Attachment 3, Project drawings and
plans can be found in Attachment 4, an evaluation conducted for bank stabilization and cofferdam
Page 2 of 10

selection can be found in Attachment 8, and the Hydrologic and Hydraulic Analysis Report can be
found in Attachment 9.
Carrier Bridge Pump Station Replacement
The new CBPS replacement facility will be constructed north of the existing CBPS (Attachment 3:
Figure 3). A turnaround site to accommodate a 40 ft long single -unit truck is proposed as well as
an 11.8 ft wide paved lane between the south side of the PS building bollards and 6-inch-high
curb, which will accommodate MSD cars or smaller trucks. The total facility area of the new
CBPS will be approximately 3,979 square feet (sq ft) (0.1 acre), and the total construction work
area for the new CBPS will be approximately 12,733 sq ft (0.29 acre). The existing site for the
new CBPS consists of low -quality upland woodland and is heavily disturbed. Approximately 9,087
sq ft (0.21 acre) of upland woody vegetation (i.e., trees and shrubs) will need to be removed
within the proposed facility right-of-way (ROW).
The existing CBPS will remain in operation while the new CBPS is being constructed. After
construction of the new CBPS is completed and it is placed into service, the original station will be
placed out of service, demolished, and its former site will be incorporated into the new station's
paved driveway and concrete pavement.
Lead and Asbestos Survey
Because the original CBPS was constructed in 1966, there is a high probability that the building
contains lead -based paint (commonly found in buildings constructed before 1978) and/or
asbestos (commonly found in buildings constructed before 1973). Accordingly, MSD authorized
the performance of a lead paint/asbestos survey to determine the extent of potential lead and
asbestos present in the existing CBPS. On March 2, 2021, Fleetwood Daniels Group, LLC (FDG)
conducted a survey on the potential lead- and asbestos -containing materials found within the
existing CBPS. Asbestos was only found in the exterior door caulking sampled, and lead was
detected in the magenta and red paints found on the interior handrails and protective cages, as
well as the exterior door casings and columns.
Based on these findings, appropriate mitigation measures (i.e., remediation) will be incorporated
into the Project design by the contractor, as appropriate. Prior to the initiation of any equipment
removal or demolition activities associated with the Project, areas of the existing CBPS exhibiting
the presence of asbestos and lead -based paints, along with all areas of similar material use (i.e.,
exterior caulking and magenta/red paints), will be remediated in accordance with federal, state,
and local regulations, as applicable, to prevent any potential environmental impacts or human
hazards.
Existing Mechanical, Electrical, and Control Equipment
After the existing CBPS building has been cleared from any potential lead and asbestos concerns
(i.e., being absent or mitigated), internal demolition will begin with removal of mechanical,
electrical, and control equipment from the entire PS site. Any removed metal will be hauled away
off -site for scrap metal pickup and recycling.
Existing Wet Well and Force Main
The existing wet well and 24-inch-diameter force main of the existing CBPS will be pumped out.
This will be accomplished using a vacuum truck and the sludge will be removed and properly
disposed of off -site. If the wet well is determined to be too deep for use of a vacuum truck, solids
pumping equipment will be brought in to pump out the wet well in stages to remove the sludge for
off -site disposal.
The 24-inch-diameter force main that crosses the French Broad River will be abandoned in place
by cutting and capping the existing pipe. This line will not be kept in service because it is
considered a "high -risk force main" due to its age and submergence in the riverbed, and would
present an environmental hazard under the increased demand for the new CBPS.
Page 3 of 10

Demolition of Existing Building Structure
The existing CBPS building has a brick and masonry facade, which will be removed to 3 ft below
land surface. In addition to removing masonry, ground level floor and pavement will be removed.
Finally, the wet well and dry pit sections of the existing CBPS will be filled with sand.
Proposed Carrier Bridge Pump Station
The new CBPS will consist of an approximately 4,200 sq ft, two -level building with screening
dumpster loadout room, electrical room, bathroom, storage space, odor control fan room on the
upper level, and pump room and screening channels on the lower level. Additionally, the new
CBPS will include:
• Two influent screens with a 1.5-inch screen opening size, each rated for 50 mgd peak
flow.
• Four dry -pit submersible pumps and associated valves, flow meter, and piping.
• Two 12 ft diameter dual bed carbon units for odor control.
• Standby diesel generator sized at 2,000 kilowatts (kW).
• Supervisory Control and Data Acquisition (SCADA) remotely monitored influent screens,
pumps, and alarms.
• Security system of site and building, including alarms and surveillance cameras.
The new CBPS will be situated on approximately 40,000 sq ft (0.91 acre) of land, which includes
the approximately 19,000 sq ft (0.43 acre) existing CBPS grounds and access road.
Site Resurfacing
The final stage of the existing CBPS demolition will be to re -grade the site and repave the parking
area. Additionally, to improve the aesthetics and erosion control, disturbed areas not paved for
parking will be revegetated with a native seed mix.
36-inch-diameter Force Mains
Two parallel 36-inch-diameter force mains, one duty and one backup, will replace the existing 24-
inch diameter DIP force main, will be installed between the new CBPS and the existing 54-inch-
diameter interceptor located on the opposite (east) side of the French Broad River (Attachment 3:
Figure 3). Construction of the new force mains will be conducted by open -cut dry -ditch (trenching)
methods. The two parallel 36-inch-diameter force mains will measure approximately 1,546 linear
ft in total, including an approximately 250 linear ft crossing under the French Broad River
(referred to as the North River Crossing). Additional details regarding construction across the
river are presented in section below titled French Broad River Pipeline Crossing.
The upland areas along the proposed parallel 36-inch-diameter force main alignments consist of
upland woodland and open grassland areas (i.e., French Broad River Park and overhead
transmission line ROW). The total upland construction areas measure approximately 1,296 linear
ft (1.48 acres). Approximately 825 linear ft (0.98 acre) of upland woody vegetation (i.e., trees and
shrubs) will be removed within the proposed alignment ROW.
60-inch-diameter Influent Gravity Sewer Interceptor
A single 60-inch-diameter gravity sewer interceptor pipe will be constructed to direct wastewater
flows into the new CBPS. This pipe is needed to direct increased wastewater flows projected for
the next 50 years that will be conveyed to the new CBPS. The new 60-inch-diameter gravity
sewer interceptor pipe will connect to the existing 48-inch-diameter South French Broad
interceptor pipe just south of Amboy Road near the Amboy Road bridge over the French Broad
River (Attachment 3: Figures 3 and 8A). Construction of the new pipe will be conducted by open -
cut dry -ditch (trenching) methods. The total length of the new 60-inch-diameter gravity sewer
interceptor pipe is approximately 850 linear ft.
The upland areas along the proposed 60-inch-diameter gravity sewer interceptor pipe alignment
consist of open upland woodland, open grassland areas (i.e., French Broad River Park and
overhead transmission line ROW), paved parking lot and park paths, and Amboy Road. The total
Page 4 of 10

upland construction areas measure approximately 850 linear ft (0.95 acre). Approximately 700 ft
(0.86 acre) of upland woody vegetation (i.e., trees and shrubs) will be removed within the
proposed alignment ROW. In addition, the Project includes construction of an approximately 300
linear ft river crossing segment consisting of a 60-inch-diameter pipe under the French Broad
River just west of the Carrier Park Sports Facility (Attachment 3: Figures 3 and 8B). The purpose
of this pipe crossing (referred to as the South River Crossing) is to accommodate a future
extension of the proposed 60-inch-diameter gravity sewer interceptor pipe directing increased
wastewater flows to the new CBPS. Construction of the proposed 60-inch-diameter gravity sewer
interceptor pipe extension is not slated for construction until approximately 2035. As such, the
proposed 60-inch-diameter pipe installed under the river as part of this Project will be capped at
both ends until MSD is ready to proceed with the extension pipe, which will connect to this
crossing point. Additional details regarding construction across the river, bank stabilization, and
vegetation clearing is presented in the section below titled French Broad River Pipeline Crossing.
French Broad River Pipeline Crossings
Four construction options were evaluated to cross the French Broad River, of which the open -cut
dry -ditch method was selected. The open -cut replacement method is the oldest and most
common method of pipeline construction. It involves excavating a trench and either installing a
new pipe by removing and replacing the existing pipe or constructing a new parallel pipe near the
existing pipe. For this application, the old pipe will be removed and replaced with a larger
diameter pipe utilizing a corrosion -resistant pipe material such as polyvinyl chloride (PVC), fiber -
reinforced polymer (FRP), or epoxy -lined DIP. Installation for each pipe crossing of the river
(north and south river crossings) will be performed in two stages to allow adequate river flow
during the construction process. Each new pipeline will be installed under the French Broad River
by erecting a temporary U-shaped cofferdam extending out from the riverbank around half of the
crossing. The area behind the cofferdam will then be dewatered so that the riverbed can be
excavated to install the new pipe. River flow will be maintained within the river channel and
diverted around the cofferdam. Excavation work crossing the river will only occur in the dry area
behind the cofferdam. After the first section of pipe has been installed under the riverbed, the
excavated area will be backfilled to pre-existing riverbed elevations. The cofferdam will then be
removed and reinstalled on the other side of the pipeline crossing extending out from the opposite
riverbank. Once installed, the steps will be repeated by dewatering the area behind the cofferdam
and then excavating the riverbed to install the rest of the pipe across the river. After the second
section of the pipe has been replaced under the riverbed, the excavated area will be backfilled to
pre-existing riverbed elevations and the cofferdam will be removed.
Cofferdam Hydraulics and Selection
A cofferdam is an enclosure built within a body of water to allow dry construction to occur within
that area. The body of water within the enclosed area is pumped out to create a dry working
environment. The proposed cofferdam for construction of the new CBPS 36-inch-diameter force
mains and the 60-inch-diameter influent gravity sewer line will enable a dry work area within the
riverbed measuring approximately 50 ft wide for equipment access and construction of the new
pipeline crossings.
An evaluation was conducted to determine suitable cofferdam alternatives for the work proposed
within the French Broad River and is included in the Bank Stabilization Alternative Evaluation
Summary Report (Attachment 8). Three cofferdam types were analyzed to determine which
option would be most appropriate for the site: rockfill cofferdam (i.e., a rock slope protection
[RSP] cofferdam), unbraced cofferdam (i.e., sheet piles with king pile), and braced cofferdam
(i.e., braced box sheet pile) (further details on each cofferdam type is provided in Attachment 8).
The use of each option has specific benefits, limitations, and potential risks. Additionally, there
are numerous variations for each type of cofferdam option and some hybrid types that share
features of each general type. A hydraulic analysis was conducted to determine the potential
water surface elevation impacts caused by the installation of a temporary cofferdam structure
within the French Broad River in order to determine the preferred cofferdam type best suited for
use within the river. A HEC-RAS computer model program (evaluates the potential hydraulics of
Page 5 of 10

water flow through natural rivers and other stream channels) was used to simulate the hydraulics
of water flow through the French Broad River at different sections along the river. This analysis
identified what the water elevations would be flowing at during a 2-year, 5-year, 10-year, and 25-
year storm event. Based on the evaluation conducted, the sheet pile cofferdam type is
recommended for this Project as it has the least impact on the river hydraulics and can be better
anchored to the solid rock riverbed. The shoring contractor will select the specific method, either
sheet pile with king piles or the braced box sheet pile construction, that is most economical and
constructible prior to initiating Project activities within the river.
Each placement of the cofferdam will span approximately 130 linear ft from the riverbank into the
river, a little over half of the total river width, with two placements from opposite ends to complete
each river crossing. The cofferdam height was determined based on the desired storm flow
elevations and is anticipated to be a minimum of 12 ft above the riverbed for an acceptable 2-year
storm event design. The maximum potential cofferdam footprint will be approximately 50 ft wide.
Riverbank Stabilization
Riverbank stabilization will be required on both sides of the French Broad River to install the
proposed cofferdams and pipeline at the river crossings (i.e., proposed north and south
crossings). Riverbanks in these areas are composed of easily eroded sand and silt mixtures.
Existing bank erosion was noted during field reconnaissance efforts and was concentrated along
the outside turns of the river where erosional effects (i.e., scouring) are highest from river flows.
Currently root masses of the riparian trees along the banks on both sides of the river are
stabilizing the slopes at the river crossings (i.e., proposed north and south crossings). The use of
cofferdams during construction will result in increased velocity of flows passing around the
cofferdam, which in turn will increase scouring along the riverbank opposite of the cofferdam.
Existing riparian vegetation will provide some protection, but additional bank protection is
warranted for the Project and proposed activities at the river crossings.
An evaluation was conducted to determine suitable bank stabilization measures to counter for
increased flow velocities anticipated during the temporary installation of cofferdam structures
within the river. This evaluation is included in the Bank Stabilization Alternative Evaluation
Summary Report (Attachment 8). Three bank protection methods for erosion control were
considered for each side of the river crossing and included RSP (i.e., rip rap), articulated concrete
blocks, and gabion mattress bank protection measures. MSD is evaluating the potential to retain
some of the existing riparian trees where bank stabilization measures are being evaluated to aid
in stabilization measures and natural vegetation regrowth once construction is completed.
Preliminary hydraulic modeling indicates the North River Crossing for the proposed 36-inch-
diameter force mains will require approximately 300 linear ft (0.43 acre) of bank stabilization on
the west bank and approximately 300 linear ft (0.44 acre) of bank stabilization on the east bank
(Attachment 3: Figure 8A). The South River Crossing for the proposed 60-inch-diameter gravity
sewer line will require approximately 600 linear ft (0.78 acre) of bank stabilization on the north
bank and approximately 475 linear ft (0.65 acre) of bank stabilization on the south bank
(Attachment 3: Figure 8B). The Bank Stabilization Alternative Evaluation Summary Report
(Attachment 8) provides recommendations for the shoring contractor on the type and quantity for
each evaluated bank protection method (i.e., RSP, articulated concrete blocks, gabion mattress).
The shoring contractor will select the specific method that is most economical and constructible
prior to initiating Project activities within the river.
The temporary bank stabilization measures will be removed after pipe installation across the river
is completed and will be replaced with permanent natural bank stabilization using bioengineering
techniques to strengthen and return the bank slopes to vegetated riparian habitats.
48-inch-diameter and 54-inch-diameter Gravity Sewer Rehabilitation
MSD seeks to replace deteriorated sections of the existing 48-inch-diameter and 54-inch-
diameter French Broad River Interceptor Gravity Sewer along the east bank of the French Broad
River paralleling Lyman Street due to severe corrosion (Attachment 3: Figures 3 and 8A). MSD
has determined that four sections of the existing 48-inch-diameter and 54-inch-diameter French
Page 6 of 10

Broad River Interceptor Gravity Sewer Pipe along Lyman Street have significantly deteriorated
and will be replaced with a larger 60-inch-diameter diameter pipe. Approximately 1,044 linear ft of
the existing 48-inch-diameter/54-inch-diameter pipe will be replaced with the larger 60-inch-
diameter pipe. The majority of this segment is along an existing path in open grassland areas and
will require little to no tree clearing. Additionally, MSD will repair approximately 450 linear ft of the
existing 54-inch-diameter pipe along Lyman Street at the proposed connection point with the two
parallel 36-inch-diameter force mains. The repair will consist of an interceptor lining to repair
areas of deterioration within the pipe.
Approximately 667 linear ft (0.74 acre) of the proposed alignment consist of riparian habitat and
may require some tree removal within the alignment ROW. Approximately 158 linear ft (0.1 acre)
of the proposed alignment is located within a delineated wetland area (the southern limits of the
proposed segment). The rehabilitation of these sections of pipe will be conducted concurrently
with the CBPS Project.
A detailed condition assessment of the existing 48-inch-diameter and 54-inch-diameter pipe
sections has not been performed; however, the rehabilitation or repair method(s) selected will
provide full structural support similar to that of a new pipe. The rehabilitation/repair methods
selected will protect the existing pipeline from further corrosion, restore structural integrity, reduce
infiltration, eliminate leaking joints, and increase pipeline flow capacity. Considerations for
selecting a rehabilitation/repair method include potential public and environmental impacts, proof
of technology method, hydraulic capacity, and estimated construction costs.
Access
New access roads are not proposed as part of the Project. Site access will utilize existing roads
within the Action Area. Construction activities conducted on the north side of the French Broad
River will primarily utilize Amboy Road and existing park roads. Lyman Street will be used for site
access on the east side of French Broad River for the proposed North River Crossing of the 36-
inch-diameter force mains. Existing private roads within the Biltmore Estate will be used for
construction access to the proposed South River Crossing for the 60-inch-diameter gravity sewer
pipe on the south side of French Broad River. Access within the Biltmore Estate will take the
Jones Farm Road (an existing private estate road) from State Highway 191 (Brevard Road) down
to Long Valley Road (an existing private estate road). The access route then shifts off of Long
Valley Road, approximately 380 ft before the Long Valley Lake dam crossing, to an unnamed
gravel road (an existing private estate road). Site access will utilize this existing unnamed gravel
road to avoid creating airborne dust near the vineyards growing adjacent to Long Valley Road on
the other side of the dam. Access will travel north on the existing unnamed gravel road until it
reaches the French Broad River where site access will then travel southeast along the river edge
on another existing unnamed gravel road where it connects to Biltmore Estate Drive (an existing
private estate road, also referred to as Old Pine Top Road) and a two-lane bridge crossing the
French Broad River (an existing private estate bridge). Site access will then travel north along
Line House Road (an existing private estate road) that parallels the river to the proposed work
area for the South River Crossing (Attachment 3: Figures 1 and 2).
Portions of the proposed access route within the Biltmore Estate may require widening to
accommodate two-way traffic movement of construction equipment and vehicles (either by
constructing pullover points or widening to two lanes), and potentially to accommodate an
adequate turning radius for larger/longer equipment and vehicles. MSD is currently coordinating
with officials at the Biltmore Estate to determine suitable road improvements to accommodate site
access to the South River Crossing proposed work area. Road improvements along the existing
Biltmore Estate roads will not exceed 25 ft from the existing centerline and will only be conducted
in appropriate areas to facilitate safe passage of equipment and vehicles. Proposed site access
will not require modification or extension of any existing culvert or bridge crossings.
Staging and Laydown Areas
Project staging and laydown areas have not been determined at the time this PCN was prepared,
but will be implemented on an as -needed basis in areas that are void of tree and brush cover
Page 7 of 10

(i.e., open grass fields, agricultural crops, parking lots, or open dirt fields). Wherever feasible,
staging and laydown areas will be contained within the Project ROW. The Project contractor will
be responsible for coordinating with landowners for use of any additional staging or laydown
areas outside of the existing Project ROW. Any additional staging or laydown area selected by
the Project contractor will also be within an area void of tree and brush cover and will be adjacent
to or within the immediate construction work areas.
Facility Operation and Maintenance
Following completion of Project construction, MSD operations of the new CBPS and pipelines will
include maintenance of the facility site and ROW areas. The new CBPS facility will consist of
maintaining the landscaped and grassy areas by mowing, trimming, and brush clean-up, as
applicable. Pipeline ROW will include a 50 ft easement on centerline. The ROW areas will be
revegetated with a native grass and/or grass -herbaceous seed mix and routinely mowed as
needed. Replanting of tree species within the pipeline ROW areas will not be feasible due to the
damaging effects of larger tree roots on installed pipes; therefore, ROW areas will be maintained
as open grassy and/or herbaceous plant growth only.
7. Addresses of adjoining property owners, lessees, etc. whose property adjoins the
waterbody
Map ID #
Property identification
number (tax PIN or parcel
ID)
Property Owner Name
Property Address
(Street, City, State, Zip Code,
Country)
2
PIN# 963729570800000
City of Asheville
99999 Amboy Road
Asheville, North Carolina, 28806, USA
3
PIN# 963759682400000
Sand Stone Properties
LLC
211 Amboy Road
Asheville, North Carolina, 28806, USA
4
PIN# 963759882300000
Harrins Sand and
Gravel LLC
195 Amboy Road
Asheville, North Carolina, 28806, USA
5
PIN# 963769089500000
Riverfront Studio LLC
199 Amboy Road
Asheville, North Carolina, 28806, USA
7
PIN# 963830102900000
Wilson Tony M.;
Wilson, Ann
330 Amboy Road
Asheville, North Carolina, 28806, USA
8
PIN# 963830622200000
521 Amboy LLC
521 Amboy Road
Asheville, North Carolina, 28806, USA
9
PIN# 963830920700000
521 Amboy LLC
270 Amboy Road
Asheville, North Carolina, 28806, USA
12
PIN# 963850402500000
City of Asheville
220 Amboy Road
Asheville, North Carolina, 28806, USA
13
PIN# 696386070710000
City of Asheville
202 Amboy Road
Asheville, North Carolina, 28806, USA
14
PIN# 963870813700000
Riverlink Inc.
190 Amboy Road
Asheville, North Carolina, 28806, USA
15
PIN# 963890054400000
City of Asheville
180 Amboy Road
Asheville, North Carolina, 28806, USA
16
PIN# 963890974600000
City of Asheville
99999 Amboy Road
Asheville, North Carolina, 28806, USA
17
PIN# 963890979800000
City of Asheville
99999 Amboy Road
Asheville, North Carolina, 28806, USA
21
PIN# 963893497500000
VG Enterprises LLC
191 Lyman Street
Asheville, North Carolina, 28806, USA
22
PIN# 963893552000000
VJ's Auto Inc.
500 Lyman Street
Asheville, North Carolina, 28806, USA
23
PIN# 963893634500000
Foundation Studios
LLC
289 Lyman Street
Asheville, North Carolina, 28806, USA
Page 8 of 10

Map ID #
Property identification
number (tax PIN or parcel
ID)
Property Owner Name
Property Address
(Street, City, State, Zip Code,
Country)
24
PIN# 963893766400000
Foundation Studios
LLC
36 Foundy Street
Asheville, North Carolina, 28806, USA
25
PIN# 963894373100000
City of Asheville
99999 Lyman Street
Asheville, North Carolina, 28806, USA
28
PIN# 964800680700000
Asheville River
Recreation
125 Meadow Road
Asheville, North Carolina, 28806, USA
29
PIN# 964800983100000
Robert C. Burris, Heirs
99999 Meadow Road
Asheville, North Carolina, 28806, USA
30
PIN# 964801816600000
Southern Railroad Co.
104 Meadow Road
Asheville, North Carolina, 28806, USA
E. Impacts Justification and Mitigation
1. Avoidance and Minimization
la. Specifically describe measures taken to avoid or minimize the proposed impacts through
project design.
The Project has been designed to avoid existing waterways and wetland areas to the
greatest extent feasible. Construction of the new pump station will be conducted in an upland
area, approximately 430 ft at its nearest point from the river's edge of the French Broad River.
The overall footprint for the new pump station and associated pervious cover (i.e., parking/
pavement) is minimized to the greatest extent feasible to accommodate proposed internal
equipment required for future anticipated flows over the next 50 years and staff vehicles.
Apart from the unavoidable river crossings needed to accommodate incoming and
outcoming flows from both sides of the river, the proposed new pipeline alignments have been
routed in upland areas and avoid excavations within any wetland areas. The design for an
underground pipeline reduces any long-term aesthetic impacts associated with the recreational
uses of the parks and the river following construction and avoids the potential for an accidental
above ground rupture and associated contamination spill that could have serious impacts on the
French Broad River and human health.
1 b. Specifically describe measures taken to avoid and minimize proposed impacts
through construction techniques.
Project construction activities will be contained within the 50 ft Project ROW to minimize
overall Project disturbances. Areas used for staging, laydown, and material/equipment storage
will be contained within the Project ROW and additional temporary easements will not be required
to complete the Project construction.
The appropriate local and state stormwater construction permits will be obtained prior to
initiating construction activities for the Project. Appropriate best management practices (BMPs),
including erosion and sediment control measures, good housekeeping practices/site
management, proper material storage, and equipment maintenance, will also be implemented to
avoid and minimize any potential stormwater pollution as a result of Project construction activities.
BMPs will remain in place until final ground stabilization is obtained and BMPs can be
removed/discontinued.
Construction activities are proposed within the French Broad River to install two pipeline
crossings under the riverbed for the proposed 36-inch force main pipes and the 60-inch gravity
sewer pipe. Installation of the two pipe crossings will be conducted by open -cut dry ditch methods
at a perpendicular angle to the river. To minimize Project activities associated with an open cut
across the river, cofferdams will be installed to cross the river in two phases as previously
outlined in Section C.4i. Cofferdam installation proposed for each river crossing will be minimized
Page 9 of 10

to no more than a 50 ft wide dry work area for equipment access and construction. The
construction contractor will be responsible for developing and implementing a construction safety
plan and emergency response contingency plan for the installation and operation of the
cofferdams throughout the duration of the Project.
Temporary riverbank stabilization measures will also be implemented on both sides of the
river, both upstream and downstream of the proposed cofferdam installation, to minimize potential
bank erosion that may be associated with the placement of the cofferdam structure within the
river and anticipated flow velocities as previously outlined in Section C.4i. Temporary bank
stabilization will consist of RSP (i.e., rip rap), articulated concrete blocks, and/or gabion blanket
bank protection measures. MSD is evaluating the potential to retain some of the existing riparian
trees where bank stabilization measures are being evaluated to aid in stabilization measures and
natural vegetation regrowth once construction is completed. The temporary bank stabilization
measures will be removed after pipe installation across the river is completed and will be replaced
with permanent natural bank stabilization using bioengineering techniques to strengthen and
return the bank slopes to vegetated riparian habitats.
Construction activities are also proposed within one delineated wetland located along the
proposed 48-inch and 54-inch gravity sewer rehabilitation alignment between the French Broad
River and Lyman Street. Activities within the delineated wetland area will be limited to the
laydown and stringing of the new 60-inch pipe for rehabilitation of the deteriorated section of the
existing gravity sewer line. Temporary matting will be used in the wetland area to avoid impacts
from construction activities and equipment/vehicle movements. Additionally, BMPs will be
implemented to protect the wetland area from any potential sediment contamination from
stormwater flows leaving the excavated areas proposed for pipeline rehabilitation. The temporary
matting will be removed after rehabilitation of the pipeline is completed. BMPs will remain in place
until final ground stabilization is obtained and BMPs can be removed/discontinued.
G. Supplemental Information
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5g. Does this project involve bridge maintenance or removed?
5g1. If yes, have you inspected the bridge for signs of bat use such as staining, guano, bats,
etc.?.
YES. Although no bridge maintenance or removal is proposed as part of the Project,
construction activities will be conducted near the Amboy Road Bridge crossing the French Broad
River. As such, bat surveys were conducted to evaluate Project areas, including the bridge, for
potential signs of bat use. Further details on the bat surveys conducted for the Project area are
presented in the Biological Assessment included in this application submittal (Attachment 10).
If you answered yes to 5g1, did you discover any signs of bat use?
NO
5i. Does this project involve blasting and/or other percussive activities that will be conducted by
machines, such as jackhammers, mechanized pile drivers, etc.?
YES
If yes, please provide details to include type of percussive activity, purpose, duration, and specific
location of this activity on the property.
Page 10 of 10

1
Attachment 1 - Pre -Filing
Meeting Request

Mularski, Eric
From: Mularski, Eric
Sent: Thursday, June 24, 2021 2:04 PM
To: '[e-mail]'
Cc: Prosser, Darin; [e-mail]; Shultz, Matthew; '[e-mail]';
[e-mail]
Subject: Buncombe County. Pre -Application Meeting Request, Carrier Bridge Pump Station
Replacement Project
Attachments: MSD_CarrierBridgeORM_PreApplicationRequest.pdf; Carrier Bridge - Pipeline River
Crossing Memo.pdf
Good afternoon,
HDR, on behalf our client the Metropolitan Sewer District of Buncombe County (MSD), is requesting a pre -
application meeting request for the proposed Carrier Bridge Pump Station Replacement Project in Buncombe
County, North Carolina. Please find the completed ORM Data Entry Fields for New Actions Form and technical
memorandum that details the purpose and need for the proposed project and alternatives analysis. We would
like to schedule a pre -application meeting with the US Army Corps of Engineers and applicable environmental
regulatory agencies to discuss the proposed pipeline alternatives. A separate 401 Water Quality Pre -Filing
Request will be submitted to the NC Division of Water Resources. We look forward to discussing this important
project and working collaboratively through the Clean Water Act Section 404 process.
Thank you,
Eric Mularski, Pws
Environmental and Regulatory Team Lead
HDR
440 S. Church Street
Charlotte, NC 28202
D 704-973-6878 M 704-806-1521
[e-mail]
hdrinc.com/follow-us
1

Preliminary ORM Data Entry Fields for New Actions
ACTION ID #: SAW -
Prepare file folder n
Begin Date (Date Received):
Assign Action ID Number in ORM
1. Project Name [PCN Form A2a]: Carrier Bridge Pump Station Replacement Project
2. Work Type: Private nlnstitutional 171 Government ❑ Commercial
3. Project Description / Purpose [PCN Form B3d and B3e]:
Please refer to the attached memorandum submitted as part of the USACE Pre -Application Meeting Request for project description,
purpose and need and alternatives analysis.
4. Property Owner / Applicant [PCN Form A3 or A4]: Metropolitan Sewer District of Buncombe County (ME
5. Agent / Consultant [PNC Form A5 — or ORM Consultant ID Number]:
HDR (POC Eric Mularski)
6. Related Action ID Number(s) [PCN Form B5b]:
7. Project Location — Coordinates, Street Address, and/or Location Description [PCN Form Bib]:
35.569583, -82.564443 French Broad River Park (see attached)
8. Project Location — Tax Parcel ID [PCN Form B 1 a] : 963891989100000/963794403000000/9648020655
9. Project Location — County [PCN Form A2b]: Bumcombe
10. Project Location — Nearest Municipality or Town [PCN Form A2c]: Asheville
11. Project Information — Nearest Waterbody [PCN Form B2a]: French Broad River
12. Watershed / 8-Digit Hydrologic Unit Code [PCN Form B2c]: Upper French Broad River 06010105
Authorization: Section 10 fl Section 404 fl Section 10 and 404 ❑
Regulatory Action Type:
❑ Standard Permit
_ Nationwide Permit #
_ Regional General Permit #
Jurisdictional Determination Request
OPre-Application Request
❑ Unauthorized Activity
❑ Compliance
❑ No Permit Required
Revised 20150602

Memorandum
Date: June 2021
Project: Carrier Bridge Pump Station Replacement
To: Metropolitan Sewerage District of Buncombe County
From: HDR
Subject: Pipeline River Crossings Alternatives
General Description
The Metropolitan Sewerage District of Buncombe County (MSD) owns and operates over 1,100
miles of collection systems, 40 pump stations, and the French Broad River Water Reclamation
Facility (WRF), with a permitted capacity of 40 million gallon per day (mgd). MSD provides
wastewater collection and treatment service to over 170,000 customers.
To meet the demands from increasing population and development, MSD continues to
rehabilitate existing, and construct new, pump stations and pipelines. One of their current pump
station (PS) expansion projects is the Carrier Bridge PS Replacement. The existing pump
station provides a capacity of 22.6 mgd. MSD is currently designing a new PS to replace the
existing to convey a peak flow of up to 50 mgd. The new PS is expected to be constructed and
ready for service in 2025.
To convey these higher future flows into and out of the new PS, the existing influent gravity
sewer and existing discharge force main also need to be replaced with larger pipes, which
requires crossings of the French Broad River.
This memorandum summarizes the evaluations completed to compare alternatives for crossing
the French Broad River with MSD's proposed 60-inch gravity sewer and parallel 36-inch force
main pipes. The gravity sewer pipe and the two parallel force main pipes cross at two different
locations. The proposed locations are shown in Figure 1 below.

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Alternative Analysis
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Pisgah View Apartments 9 9
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Proposed Carrier Bridge
Wastewater Pump Station
P,ary St
Fishwater Maps 9
Key Commons
Apartments
Asheville Lawn
Bowling Club
9 Asheville 0utdoor,Center
! i Carrier Park Shelter
Carrier.Park
nes Perjdrmance 8
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Proposed 60" Gravity
Sewer Pipe
Figure 1 Location of Two River Crossings
Alternative Analysis
9
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Coffee Bar 8 Dellll
Home
WNC Photo Tours 9
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River Dog P
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Upstream Way Luxury Q
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m
Four alternatives were evaluated to construct the 60-inch gravity sewer and the two parallel 36-
inch force main sewers across the French Broad River. The work includes two separate
crossings, the two force main pipes will be installed adjacent to each other in the same crossing.
These alternatives including the following, which are further described below:
• Alternative 1 -
• Alternative 2
• Alternative 3
• Alternative 4 -
Microtunneling
— Horizontal Directional Drilling
— Open -Cut Trench
Utility Bridge
Alternative 1 - Microtunneling
Description
Microtunneling can be used to install both the force main pipes and the gravity sewer crossing.
A microtunnel boring machine (MTBM), combined with the jack -and -bore method, directly
installs the pipe underground in a single pass. The following steps are included in a successful
microtunneling operation:
1. Excavation — The launching and receiving shafts for the boring machine must be
excavated at opposite ends of the tunneling drive.
2

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Alternative 1 - Microtunneling
2. Microtunnel Boring Machine — Hydraulic jacks in the launch shaft push the MTBM into
the ground and pipes containing the resulting slurry water transport excavated soils to
the surface.
3. Pipe Installation — After the jacks are retracted from the MTBM, a pipe casing is lowered
into the shaft and inserted between the jacking frame and MTBM. The MTBM is then
advanced until it reaches the receiving shaft.
Geotechnical considerations
Geotechnical investigations indicate shallow depth to bedrock, and the potential microtunnel
path is expected to traverse primarily through rock. This significantly reduces the potential for
surface settlement and heave, and reduces the potential for slurry loss and encountering
obstructions in the soil column.
Casing Pipe
The jacking pipe will need to be capable of withstanding both short-term and long-term loads
underground. The proposed jacking pipe for each 36-inch force main is a 60-inch steel casing
pipe, and an 84-inch steel casing pipe for the 60-inch gravity sewer.
Conceptual Microtunnel ALIGNMENT
The proposed depth of the microtunnel path for all three casing pipes is 10 feet below the
bedrock surface from the top of the casing pipe. This places the bottom of the tunnels
approximately 45-50 ft below the ground surface along the river bank.
Workspace and Access
The proposed microtunnel crossing alignments involves a workspace area along the French
Broad River. The proposed circular launch shafts are 30-40 feet in diameter and 45 feet deep to
get below the riverbed and below the silt and softer soils just below the riverbed. The proposed
receiving shafts are 20-30 feet in diameter and 50 feet deep. The launch shaft work areas will
need to be 150-ft by 150-ft; the receiving shaft areas are in the range of 75-feet by 75-feet.
Cost Estimate
Table 1 is a preliminary (AACE Class 3) opinion of probable construction costs (-20% to +30%)
for installing the three pipes by microtunneling under the river. For the two force main pipes,
separate casing pipes will be installed for each pipe however both can be installed using the
same launch and receiving shaft.
Table 1. Preliminary cost opinion, microtunnel river crossing option
Item
Unit Quantity Unit cost Estimated cost
Mobilization/demobilization (3%) LS 1 $ 400,000 $ 400,000
2 Launch shafts VF 90 $ 35,000 $ 3,150,000
2 Receiving shafts VF 100 $ 25,000 $ 2,500,000
2 60" tunnels LF 800 $ 4,000 $ 3,200,000
36" force main pipes LF 800 $ 600 $ 480,000
84" tunnel LF 400 $6,000 $2,400,000
60" gravity sewer pipe LF 400 $1,000 $400,000
3

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Alternative 2 - Horizontal Directional Drilling
Item Unit Quantity
Unit cost Estimated cost
Grout tunnel annulus LF 1,200
$ 350 $ 420,000
Backfill shaft VF 190
$ 300 $ 57,000
36" vertical piping into shafts LS 1
$ 100,000 $ 100,000
Subtotal $ 13,107,000
Contingency 30% $ 3,932,000
Total Cost $ 17,039,000
Alternative 2 - Horizontal Directional Drilling
Description
Horizontal Directional Drilling (HDD) is a method of installing the sewer pipes under the river
through a trenchless method. It involves the use of a directional drilling machine and associated
attachments to drill along a path underground. There are three stages to effective horizontal
directional drilling:
1.
2.
3.
Pilot bore — The drill bit is connected to a rotating drill pipe and is guided along the drill
path until it emerges at the end of the boring site. Drilling fluid is pumped through the drill
bit as it bores the hole to act as both a lubricant and coolant.
Reaming — A reaming tool is attached to the drill pipe and successfully larger reaming
tools are pulled back through the borehole until the desired underground hole size is
reached.
Product Pipe Installation — The pipe is connected to a pullhead and pulled through the
borehole using the drill pipe.
This method of pipe installation is only applicable for the force main pipe crossing. This method
cannot be used for the 60-inch gravity sewer as the method includes a vertical curve that does
not allow for gravity flow.
A conceptual HDD drill path was developed for the purposes of evaluating the HDD construction
method option for the force main crossing of the French Broad River.
Geotechnical Considerations
Because of the shallow depth to bedrock observed in the soil borings completed, the majority of
any potential HDD path is likely to traverse primarily through the rock unit (hard, competent,
Gneiss).
Workspace and Access
The HDD alternative would need an approximate 150-ft by 250-ft workspace on the entry side of
the crossing and an approximate 150 ft by 200 ft workspace for exit side operations. It is likely
that the access corridor(s) and/or workspaces for any HDD crossing will require clearing trees
on one or both sides of the crossing. Project constraints or requirements for land disturbance at
workspaces and access routes must be defined and incorporated into the design process.
4

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Alternative 3 - Open -Cut Trench
Cost Estimate
Table 2 is a preliminary (AACE Class 3) opinion of probable construction costs (-20% to +30%)
for the HDD river crossing option. Since this option is not a solution for the gravity sewer
crossing, the cost of the microtunnel crossing for it was included to give a complete cost to
install all three pipes.
Table 2 Preliminary cost opinion, HDD river crossing option
Item
Unit Quantity Unit price ($)
Bid total ($)
Mobilization (3%)
LS 1 $400,000
$400,000
Site preparation
LS 1 $45,000
$45,000
2 36" pipes and assembly LF 2,770 $300
$831,000
2 Pilot hole drillings
LF 2,570 $2,500
$6,425,000
Pipe pullback
LS 1 $60,000
$60,000
60" gravity by microtunnel LS 1 $5,793,000
$5,793,000
Subtotal
$13,554,000
Contingency 30%
$4,066,000
Total cost $17,620,000
Alternative 3 - Open -Cut Trench
Description
The open -cut trench method installs the force main pipes and gravity sewer under the French
Broad River by redirecting stream flow and excavating the riverbed surrounded by a temporary
`u-shaped' cofferdam. Stream flow is diverted around the dam and then excavation work occurs
in the dry area. This would be performed in stages in order to continue stream flow through the
process. First, the cofferdam would be constructed on one half of the French Broad River and
half of the pipe would be laid. Then, the excavation filled in, the cofferdam would be removed,
and then the process would be repeated on the other half of the riverbed.
Each crossing will take approximately four to six months to complete, 2 to 3 months for one
side, and another two to three months for the others side. The crossings will likely be
constructed outside of the summer months to reduce impacts to river and adjacent greenway
use which tend to be higher during the summer. Prior to construction, a public outreach program
and public safety program will be implemented.
The following sections below outline the considerations taken into account for the open -cut
trench approach across the French Broad River:
• Cofferdam Hydraulics
• Cofferdam Type Selection
• Riverbank Stabilization
5

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Alternative 3 - Open -Cut Trench
Cofferdam Hydraulics
A cofferdam is an enclosure built within a body of water to allow dry construction to occur within
that area. The water within the enclosed area is pumped out to create a dry working
environment. Cofferdam height is based on the desired storm flow elevations. A HEC-RAS
model was used to simulate the hydraulics of water flow through the French Broad River at
different sections along the French Broad River. This analysis identified what the water
elevations would be at the base flow, 1-year, 2-year, 5-year storm flows.
Riverbank Stabilization
As a result of damming up half of the French Broad River, river depth and flow velocity in the
remaining cross section will increase. Temporary and permanent bank stabilization is required
for this river crossing option to address the resulting riverbank scouring. Temporary bank
stabilization can include large rip rap, concrete blocks, or gabion baskets. Permanent bank
stabilization can include armored vegetative options.
Cofferdam
To reduce impacts to river depths and velocities, the proposed cofferdams would be limited in
height to approximately 12-feet, lower than the adjacent riverbanks. This will contain the base
flow and 1-year storm events. 2-year and larger storm events will intentionally overtop the
cofferdam to allow these larger flows to pass.
The width of the cofferdam will need to be enough to allow for construction of the proposed
sewer pipes within a dry work zone. This zone will likely be 40 to 50-feet wide, combining this
with each side of the cofferdam, the total width will be approximately 140-feet (measured
parallel to the river). The length of the cofferdams (measured perpendicular to the river) will be
approximately 150-feet, or two-thirds the river width, to allow the pipe to be installed halfway
across the river.
Cost Estimate
Table 3 is a preliminary (AACE Class 3) estimate of probable construction costs (-20% to +30%)
for the force main with the open -cut trenching river crossing option.
Table 3 Preliminary cost options, open -trench cutting river crossing option
Item Unit Quantity Unit cost ($) Bid total ($)
Mobilization (3%) LS 1 $230,000 $230,000
Cofferdam, earth core, riprap armoring EA 4 $700,000 $2,800,000
Riverbank access and restoration EA 4 $80,000 $320,000
Temporary dam to construct cofferdam EA 4 $90,000 $360,000
Cofferdam liner EA 4 $150,000 $600,000
Dewatering EA 4 $120,000 $480,000
36-in parallel force mains LS 1 $900,000 $900,000
60-in gravity sewer LS 1 $800,000 $800,000
Riverbank stabilization EA 4 $100,000 $400,000
Work space flood recovery allowance EA 4 $100,000 $400,000
6

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Pedestrian/Utility Bridge
Item
High water delay allowance
Unit Quantity Unit cost ($) Bid total ($)
DAY 20 $15,000 $300,000
Subtotal $7,590,000
Contingency 30% $2,277,000
Total cost $9,867,000
Pedestrian/Utility Bridge
Description
In this alternative, the new proposed force mains would be attached to a bridge that crosses the
approximately 300-foot span of the French Broad River. The bridge serves two purposes, a
utility bridge for carrying the two force mains across the river, and a pedestrian bridge for public
access across the river. This alternative can only be used for the crossing of the force main
pipes. The gravity sewer crossing will need to be below the riverbed using one of the other
alternatives.
Structural Design Requirements
The specifications applicable in the design a the pedestrian bridge are AASHTO LRFD Bridge
Design Specifications, AASHTO LRFD Guide Specifications for Design of Pedestrian Bridges,
and Standardized Special Provision (STSP) "Prefabricated Steel Truss Pedestrian Bridge
LRFD". These specification provide specific design requirements related to the structural
design, load capacity, safety, and other requirements. Because the bridge will have the dual
purpose of serving as a utility crossing, the bridge can also support two 36-inch pipes inside 48-
inch steel casing pipes, an additional load of 1,700 Ibs per linear foot.
Features of the bridge include three spans, each up to 150-feet in length and12 feet wide. The
bridge decking cost estimate utilizes Trex composite decking but other options include concrete,
asphalt, various wood species, composite wood materials, steel grates, and aluminum grates.
There are horizontal safety rails spaced at 4-inches and constructed to a maximum height of 54-
inches. The preliminary layout includes two abutments along the river bank, two piers in the
river, and additional supports along the banks to support pedestrian access ramps.
Construction of the piers within the river and placing the bridge on the piers will require some
temporary construction access out into the river. Since the river is not consistently deep enough
to operate a barge and crane system that would float out in the river, this access will need to
come from each bank by constructing a short temporary access road. The road construction
includes installation of a geofabric placed on the river bottom and clean crushed gravel installed
over the fabric. Large rip rap is placed along the perimeter to stabilize the fill.
Existing Utilities
There are electrical transmission lines along the west side of the river and some that cross the
river near the proposed bridge location. MSD's existing 54-inch gravity sewer that flows north to
the wastewater treatment plant is along the east side of the river. Relocation of above -ground or
underground utilities is not expected for construction of the bridge but the location of these

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Pedestrian/Utility Bridge
utilities need to identified and proper buffers provided to protect these assets. An air release
valve (ARV), or vent pipe, will likely be required at the bridge.
Elevation of River
The bridge height and walking deck are designed based on the key elevations of the river,
including:
• River bottom: 1960 - 1965 ft
• Normal water level: 1965 - 1970 ft
• Top of riverbank: 1975 - 1980 ft
• 100 year flood elevation: 1989 ft
The bottom of the proposed bridge elevation is 1991 ft, which is 2-feet above the 100-year flood
elevation. Above this is the two force main pipes, and above those are the pedestrian walking
deck which is at an elevation of 1999.5.
ADA Compliance
The pedestrian bridge crossing is required to be compliant with the Americans with Disabilities
Act (ADA). For this reason, the pedestrian bridge will have access ramps with a 1:12 maximum
slope to meet the height of the bridge walking deck. The ramps on each side are approximately
300 ft long, with a 5-foot flat rest area every 30 feet. The orientation of the bridge ramps will be
determined during design phase.
Cost Estimate
Table 4 is a preliminary (AACE Class 3) opinion of probable construction costs (-20% to +30%)
for the utility bridge crossing option. Since this option is not a solution for the gravity sewer
crossing, the cost of the microtunnel crossing for it was included to give a complete cost to
install all three pipes.
8

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Selected Alternative - Cofferdam
Table 4 Preliminary cost opinion for the utility bridge option
Item
Mobilization (3%)
Riverbank access to piers
Unit Quantity
LS 1
EA 2
Unit price ($)
$300,000
$150,000
Bid total ($)
$300,000
$300,000
Structural excavation LS 1
$30,000
$30,000
Riverbed drilled shaft
36" Drilled shaft
Steel H-piling 12"
Structural concrete
Reinforcement bars
Purchase and set bridge sections
Bearing assembly
36-in force main and casing pipe
36-in vertical piping and support
60" gravity by microtunnel
EA
LF
LF
CY
LBS
LF
EA
LF
EA
LS
4
70
2,100
375
75,000
960
28
800
2
1
Subtotal
$50,000
$400
$75
$600
$2
$2,200
$2,200
$1,000
$150,000
$5,793,000
$200,000
$28,000
$158,000
$225,000
$150,000
$2,112,000
$62,000
$800,000
$300,000
$5,793,000
$10,458,000
Contingency $3,137,000
Total
$13,595,000
Selected Alternative - Cofferdam
Some key advantages and disadvantages to the alternatives are listed below. All alternatives
evaluated have some construction risks and potential environmental impacts, each will need to
be addressed and mitigation strategies developed prior to construction.
• Alternative 1 — Microtunneling.
o Advantages: Lowest environmental impacts. Does not require construction in
the river.
o Disadvantage: It, and Alternative 2, have the highest construction cost. Due to
geology, pipes will need to be installed at significant depths that impacts
depths of upstream and downstream pipe sections and the proposed pump
station. The size and depths of the tunnel shafts, up to 50-feet in depth,
presents significant construction challenges and risks, may require lengthy
closures of adjacent major road, greenways and areas of the park.
• Alternative 2 — Horizontal Directional Drilling.
o Advantage: Lowest ground disturbance alternative. Does not require
construction in the river.
o Disadvantage: It, and Alternative 1, have the highest construction cost. Higher
risk of environmental impacts with drilling fluids escaping bore hole and getting
into the river. Can only be used for installing the force mains, cannot be used
for installing the gravity sewer. The force main pipes will need to be installed
diagonally across the river due to the railroad tracks on the east side making
the crossing length significantly longer than the other options.
9

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Open -Cut Trench River Crossing
• Alternative 3 — Open -Cut Trench.
o Advantages: Most accurate method of getting the pipes installed along the
required alignment and at the required elevations. Lowest cost alternative.
o Disadvantages: Requires construction in the river and Impacts use of the river
during construction of the cofferdams and pipe installation. Higher construction
traffic impacting public. Potential for construction delays and additional costs
with large rainfall events.
• Alternative 4 - Utility Bridge.
o Advantages: Provides benefit to community by connecting greenways on each
side of the river.
o Disadvantages: Requires construction in the river and Impacts use of the river
during construction of the in -river piers. Has negative impacts to the force main
pipe hydraulics as it requires the sewer flow to rise and fall vertically to get
from below ground pipe to exposed pipe across the bridge. Can only be used
for installing the force mains, cannot be used for installing the gravity sewer.
Having the pipe exposed above the river creates future maintenance
challenges and safety concerns and exposes the pipe to vandalism.
The primary goal of the project is to install the proposed pipelines across the river at the location
and depth that best meets the needs of MSD to expand their hydraulic capacity of their
wastewater collection system. Alternative 3, the open -cut trench alternative provides the best
crossing method to meet this goal. The other three alternatives require the pipes to be installed
at greater depths witch significantly increases cost and creates additional operation and
maintenance challenges.
For the 60-inch gravity sewer, installation by open -cut trench allows MSD to install the pipe to
follow the natural terrain without having it installed at an excessive depth or without having to
construct an inverted siphon under the river. The depth of the gravity sewer also controls the
depth of the downstream sewers and pump station which leads to additional costs and O&M
challenges. For the two parallel 36-inch force mains, similarly, having the pipes just below the
riverbed surface at a shallower depth and appropriate slopes promotes ideal hydraulic
conditions for the force mains and upstream pump station.
Open -Cut Trench River Crossing
Hydraulic Analysis of the Cofferdams
A planning level hydraulic analysis was performed to determine the potential water surface
elevations (WSEs) impacts caused by the construction of a cofferdam across a portion of the
French Broad River. This analysis was performed near the proposed crossing location of the
force main pipes.
Peak discharges for various frequency flood events were generated from USGS Gage No.
0341500, which is located on the French Broad River downstream of the site and the USGS
10

Metropolitan Sewerage District of Buncombe County I Pipeline River Crossings Alternatives
Open -Cut Trench River Crossing
PeakFQ application. Existing condition WSEs were generated in the HEC-RS model using
various discharges from the PeakFQ.
To reduce increased water levels at the crossings and upstream areas during construction when
the cofferdam is in the river, the height of the proposed cofferdam will be sized so to contain the
base flow and 1-year storm event. This height will be lower than the existing riverbanks. Stream
flows greater than this will purposely overtop the cofferdam to allow these higher flows to pass
through. Modeling using the HEC-RAS model of this section of the river suggests that an
appropriate cofferdam height is 12-feet.
Table 1 below provides the modeling results for various river flow scenarios for the northern
(downstream) crossing location for the force main pipes. The average river bottom elevation at
this location is approximately 1961.5. The top of the cofferdam would therefore be 1973.5.
Modeling of the southern (upstream) crossing will be performed during final design, for use as a
preliminary data, the southern crossing is assumed to be similar to the northern crossing.
Table 5 HEC-RAS Modeling Results
River Flow River Flow
Scenario (cfs)
Existing Conditions With Cofferdam
Water Elevation Water Velocity Water Elevation Water Velocity
(ft) (fps) (ft) (fps)
Base Flow 2,000 1967.5 1.4 1968.3 4.5
1-Year Storm 5,300 1970.8 2.4 1972.3 6.9
2-Year Storm 14,210 1976.2 3.9 1978.0 7.0
5-Year Storm 21,910 1979.1 4.8 1980.7 7.8
The proposed cofferdam will be constructed of a combination of earth fill and large rip rap to
armor and protect the fill from erosion. A plastic liner will be installed to reduce seepage of
river water through the cofferdam. Figures 2 and 3 below provide a preliminary section and an
example photo during construction of a similar cofferdam. MSD's selected contractor will be
responsible for final design of the cofferdam and may propose alternatives to the cofferdam
design.
RIVER BOTTOM
12'
COFFERDAM
(Riprap, Gravel, Earth Fill)
SEDIMENT LAYER —�
ROCK LAYER
PRELIMINARY COFFERDAM SECTION
Figure 2 Typical Section View of Cofferdam
12'
LOW STRENGTH
CONCRETE BACKFILL
SEWER PIPE
WORK
SIDE
11

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Open -Cut Trench River Crossing
Fr
Figure 3 Example Construction Photo of Similar Cofferdam
Riverbank Stabilization
As a result of damming up half of the French Broad River, river depth and flow velocity in the
remaining cross section will increase. This increasing velocity can cause erosion and scouring of
the riverbanks. A review of the existing banks in the area of the proposed crossing indicates
that some sections are not stable as shown in Figure 4.
Figure 4 Current Erosion of Existing Riverbank
Bank stabilization will be required to address this concern. Bank stabilization during
construction can include large rip rap, gabion baskets, or similar, along with a mixture of natural
vegetation, lining the riverbanks for a length of up to 500 feet. Installing the stabilization
measures will likely require additional temporary construction easements and tree clearing to
access the area with construction equipment.
12

Metropolitan Sewerage District of Buncombe County 1 Pipeline River Crossings Alternatives
Conclusion
Conclusion
The open -cut trench alternative is the selected river crossing method. This method installs the
pipes under the French Broad River by temporarily redirecting stream flow around the
construction zone by constructing a temporary cofferdam. At each of the two crossing locations,
a cofferdam would be installed on one side of the river, after the pipe is installed, the cofferdam
will be removed and the process repeated on the opposite side to complete the entire crossing.
As part of the detailed design, a detailed erosion and sediment control design will be developed
for review and approval by the appropriate regulatory agencies for both construction activities
along the riverbanks and within the river itself. A public outreach program will also be
developed, working with key stakeholders including MSD, City of Asheville, local clubs and
businesses that utilize the river for various recreational activities, and the general public.
13

E�2
hdrinc.com
Meeting Minutes
Dat- July 23, 2021
Project: Carrier Bridge Road Pump Station Project
To: Applicant Team
Hunter Carson - MSD
Darin Prosser - MSD
Matt Shultz - HDR
Eric Mularski - HDR
-ror Eric Mularski - HDR
Matt Shultz - HDR
Agency Representatives
Amanda Jones Fuemmeler - U.S. Army
Corps of Engineers (USACE)
Andrew Moore - N.C. Division of Water
Resources (NCDWR)
Andrea Leslie - N.C. Wildlife Resources
Commission (NCWRC)
Q-h;- July 14, 2021 —Agency Pre -Application Meeting (SAW-2021-01395)
The Metropolitan Sewer District of Buncombe County (MSD) and HDR appreciates your
attendance at the Agency Pre -Application Meeting for the Carrier Bridge Road Pump
Station Project (Project) held at NCDWR's Asheville Region Office on July 14, 2021. This
document provides a summary of the items discussed during the Project meeting and
presentation.
• The meeting began with brief informal introductions of the participants.
• Mr. Shultz (HDR) provided the Project overview and purpose, which is to upsize
existing wastewater infrastructure to accommodate new growth in the service area.
The system is currently bottlenecking at the Biltmore property on the south side of
the French Broad River. Below is a brief overview on the proposed infrastructure.
50 MGD wastewater pump station (just west of French Broad River Park).
60-inch influent gravity sewer (proposed crossing of the French Broad River
from the Biltmore property; runs approximately one mile on the north side of
the river to the proposed Carrier Bridge Pump Station).
Parallel 36-inch wastewater force mains (from pump station to cross the
French Broad River and to tie into the 54-inch gravity sewer replacement).
54-inch gravity sewer replacement along Lyman Road.
Construction in multiple phases.
• Mr. Shultz presented a detailed alternative analysis.
Alternative 1: Microtunneling beneath the French Broad River
Alternative 2: Horizontal Directional Drill (parallel 36-inch force main only)
Alternative 3: Open Cut Trench/Cofferdam (preferred option)
Alternative 4: Pedestrian/Utility Bridge (parallel 36-inch force main only)
440 S. Church Street, Suite 900, Charlotte, NC 28202
T 704.338.6700 F 704.338.6760

Agency Pre -Application Meeting Minutes
Carrier Bridge Road Pump Station Project
• Cost analysis and advantages and disadvantages for each alternative were
discussed (reference the attached PowerPoint presentation).
• Mr. Mularski (HDR) presented existing environmental resources based on available
desktop data:
French Broad River
• NCDWR Classification B: Primary Recreation.
• USACE Classified as a Section 10 Navigable Waters.
• Not subject to State Riparian Buffer Rules.
• Ms. Leslie (NCDWR) confirmed that the proposed crossings are not
located in the wild trout watershed and will not require a tree
clearing moratorium.
Federally Protected Species
• The NC Natural Heritage Program (NCNHP) Elemental Occurrence
database revealed that there known occurrences of Appalachian
Elktoe within the Project Area and known occurrences of
Appalachian Elktoe (2017-09-29) and Gray Bat (2019-07-16) within
a one -mile radius of the Project Area.
• Ms. Leslie mentioned that the USFWS will require surveys for
Appalachian Elktoe as part of the Clean Water Act (CWA) Section
404/401 permitting process. The USFWS will determine the extent
of the Study Area. Mr. Mularski mentioned that a proposed Study
Plan for Appalachian Elktoe will be submitted to the agencies for
review and comment prior to conducting a survey.
• Mr. Mularski stated that HDR will consult with the USFWS on Gray
Bat survey requirements.
Cultural Resources
• Archaeological surveys indicated Native American artifacts on the
Biltmore property near the confluence of the French Broad River
and Swannanoa River. Therefore, for the alignment, the 60-inch
gravity sewer was relocated upstream to avoid this area.
• A geomorphic investigation for the 54-inch sewer line upgrade
revealed that the only cultural deposits recorded were historic and
likely related to the adjacent railyard.
• The USACE will determine the Project "permit area" to define the
limits for future cultural resources surveys.
• Mr. Mularski presented the CWA Section 404/401 Permitting strategy for the
preferred open cut trench/cofferdam option (Alternative 3).
Ms. Fuemmeler (USACE) and Mr. Moore (NCDWR) confirmed that the
proposed, unavoidable impacts to the French Broad River associated within
the temporary fill and de -watering for the cofferdam qualify for Section 404
Nationwide 58 (Utility Lines Activities for Water and Other Substances) and
Section 401 Water Quality Certification No. 4276 permitting.
Mr. Moore mentioned that according to new federal guidelines, the NCDWR
has a strict time frame to review, approve, or deny 401 Water Quality
Certifications. The applicant can reapply should the application be denied if
the application is determined to be incomplete.
Page 2

Agency Pre -Application Meeting Minutes
Carrier Bridge Road Pump Station Project
• Below is a list of avoidance, minimization, and mitigation measures that may be
included in the PCN application discussed throughout the meeting:
Ms. Fuemmeler (USACE)
• Recommended a survey for jurisdictional waters throughout the
proposed Project Area and limits of disturbance. A delineation map
will be required as part of the Pre -Construction Notification (PCN).
• After the PCN is submitted, the USACE will determine the Project
"permit area" to define the limits for future cultural resources
surveys.
• The USACE will assess cumulative impacts relating to future
planned interdependent infrastructure associated with the Project as
part of the PCN. Mr. Carson (MSD) mentioned that the South
Interceptor Project that connects into the Carrier Bridge Pump
Station Project is in MSD's capital improvements plan for
construction in the next 5 to 10 years.
• Recommended developing a detailed safety plan for recreational
boating/floating. This may include lighting, signage, and coordination
with local community and outfitters. Mentioned NCDOT developed a
River Safety Plan for the 1-16 Bridge Project.
Ms. Leslie (NCWRC)
• Recommended implementing bioengineering techniques using
native vegetation to permanently stabilize the riverbanks after
construction.
• Recommended developing a detailed contingency plan for
cofferdam construction. A robust Erosion and Sediment Control Plan
is needed to prevent sedimentation impacts to aquatic resources.
• USFWS will likely require an Appalachian Elktoe survey and
mitigation monitoring plan. The mitigation plan may require
relocation or donation for research.
Mr. Moore (NCDWR)
• Recommended reviewing the NC Division of Waste Management's
Site Locator Tool to research historic Brownfield contamination
sites, particularly near the industrial areas on the east side of the
river along Lyman Road.
• Recommended submitting an Environmental Management Plan to
Division of Waste Management's Brownfield project manager, in the
event that new contamination sources are discovered during Project
construction.
General Discussion
• Minimize the cofferdam footprint and excavation impacts to the
greatest extent practical.
• Bury the pipe at a sufficient depth below the existing stream bed to
protect the sewer line and prevent exposure in the channel. Cap
with hard rock fill.
• Develop a restoration plan for temporary fill removal including a
detailed description on how pre -project conditions will be restored.

Agency Pre -Application Meeting Minutes
Carrier Bridge Road Pump Station Project
■ Develop a detailed spill prevention plan.
■ Develop a plan with BMPs to treat muddy water from cofferdam
dewatering.
• Byron Hamstead (USFWS) was unable to participate in the meeting due to other
commitments. However, he provided a detailed email to the applicant on 7/15/2021
with guidance to develop a biological evaluation/biological assessment for the
Project.

Carrier Bridge Pump Station
Agency Pre -Application Meeting
July 12, 2021
01

01 Project Overview
02 Alternative Analysis
03 Selected Alternative
04 Environmental Resources
05 Environmental Permitting

01
Project Overview

Project Overview
• 50 MGD Wastewater Pump Station
• 60" Influent Gravity Sewer
• Parallel 36" Wastewater Force Mains
• 54" Gravity Sewer Replacement
• Construction in Multiple Phases
•
`r fPro04seii Carrier Bridge RFC°' at
,''Wastewater Pump Station. 7-74,„-"ir:
` \=:

60" Gravity Sewer
River Crossing Location

Parallel 36" Force Main Sewers
River Crossing Location
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02
Alternative
Analysis

Alt 1: Microtunneling
• Tunnel
• 2 — 60" casing pipes, 5' separation
• 1 — 84" casing pipe
• Depth is 2 diameters (10' to 14') below
bedrock surface
• Launch Shaft
• 30' to 40' diameter
• 40 to 50' deep
• 150' x 150' work area
• Receiving Shaft
• 20' to 30' diameter
• 40 to 50' deep
• 75' x 75' work area

Alt 1: Microtunneling
• Top of competent rock is - 20' below
riverbank elev.
• Pipe invert -40' below riverbank elev.
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Alt 1: Microtunneling
Item
Unit Quantity Unit cost
Estimated cost
Mobilization/demobilization (3%) LS 1
$ 400,000
$ 400,000
2 Launch shafts
VF 90
$ 35,000
$ 3,150, 000
2 Receiving shafts
VF 100
$ 25,000
$ 2,500,000
2 60" tunnels
LF 800
$ 4,000
$ 3,200,000
36" force main pipes
LF 800
$ 600
$ 480,000
84" tunnel
LF 400
$6,000
$2,400,000
60" gravity sewer pipe
LF 400
$1,000
$400,000
Grout tunnel annulus
LF 1,200
$ 350
$ 420,000
Backfill shaft
VF 190
$ 300
$ 57,000
36" vertical piping into shafts LS 1
$ 100,000
$ 100,000
Subtotal
$ 13,107, 000
Contingency 30%
$ 3,932,000
Total Cost $ 17,039,000

Alt 2: Horizontal Directional Drill
• Length of HDD = 1,285 LF
• Geotech n ical
• 15 to 20 feet of soft soil
• Below that rock with UCS up to 10,000 psi
• Undefined: Hardness, Abrasiveness, Tensile
Strength, Brittleness
• Pipe Material
• 36" HDPE (DIPS)
• DR11
• ID=37.9"
• OD = 30.9"

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Parallel 34"
Forte Yarn
Plots

Alt 2: Horizontal Directional Drill
• Can only be utilized for force main crossing
Item
Unit Quantity
Unit price ($) Bid total ($)
Mobilization (3%)
LS 1
$400,000 $400,000
Site preparation
LS 1
$45,000
$45,000
2 36" pipes and assembly LF
2,770
$300
$831,000
2 Pilot hole drillings
LF 2,570
$2,500
$6,425,000
Pipe pullback
LS 1
$60,000
$60,000
60" gravity by microtunnel LS
1
$5,793,000 $5,793,000
Subtotal
$13,554,000
Contingency
30%
$4,066,000
Total cost $17,620,000

Alt 3: Open Cut Trench
• Temporary Cofferdam
• Permanent Bank Stabilization
• Within limits of construction
• Many armored vegetative options to consider
• Temporary Bank Stabilization
• Upstream and downstream of construction
limits
• Large rip rap, concrete blocks, gabion baskets,
etc. along the riverbank
• Ex 25-year velocity - 7 fps
• Prop 5-year velocity - 8 fps
Temporary
Bank
Stabilization
;-

Alt 3: Open Cut Trench

Preliminary Cofferdam
• 12-Foot Height
.• : • • .... . • • ••• :
RIVER BOTTOM -'
COFFERDAM
(Riprap, Gravel, Earth Fill)
1.5'
12'
WORK
SIDE
LOW STRENGTH
CONCRETE BACKFILL----P././
PRELIMINARY COFFERDAM SECTION SEWER PIPE
River Flow
Scenario
River Flow Existing Conditions
(cfs)
With Cofferdam
Water Elevation Water Velocity Water Elevation Water Velocity
(ft) (fps) (ft) (fps)
Base Flow 2,000 1967.5 1.4 1968.3 4.5
1-Year Storm 5,300 1970.8 2.4 1972.3 6.9
2-Year Storm 14,210 1976.2 3.9 1978.0 7.0
5-Year Storm 21,910 1979.1 4.8 1980.7 7.8 I

Alt 3: Open Cut Trench
Item
Unit Quantity Unit cost ($)
Bid total ($)
Mobilization (3%)
LS 1
$230,000
$230,000
Cofferdam, earth core, riprap armoring EA 4
$700,000
$2,800,000
Riverbank access and restoration
EA 4
$80,000
$320,000
Temporary dam to construct cofferdam EA 4
$90,000
$360,000
Cofferdam liner
EA 4
$150,000
$600,000
Dewatering
EA 4
$120,000
$480,000
36-in parallel force mains
LS 1
$900,000
$900,000
60-in gravity sewer
LS 1
$800,000
$800,000
Riverbank stabilization
EA 4
$100,000
$400,000
Work space flood recovery allowance EA 4
$100,000
$400,000
High water delay allowance
DAY 20
$15,000
$300,000
Subtotal
$7, 590, 000
Contingency 30%
$2,277,000
Total cost $9,867,000

Alt 4: Pedestrian / Utility Bridge
• Substructure
• 2 concrete piers in the river
• Concrete abutments at each end
• Additional concrete supports for ramps
• Superstructure
• 3 — 120 foot spans across river
• 2 - 300 foot ramps
• Unpainted weathered steel
• Trex decking or similar
• Safety railing up to 54" with toe plate

Alt 4: Pedestrian / Utility Bridge
13'
-12' -
Walking Bridge
Tress
4'-6" / Deck
' 48" Steel
1 Casing Pipe
1
Roller Pipe
Support
36" Force
Main Pipe

Alt 4: Pedestrian / Utility Bridge
• Can only be utilized for force main crossing
Item
Unit Quantity Unit price ($)
Bid total ($)
Mobilization (3%)
LS 1
$300,000
$300,000
Riverbank access to piers
EA 2
$150,000
$300,000
Structural excavation
LS 1
$30,000
$30,000
Riverbed drilled shaft
EA 4
$50,000
$200,000
36" Drilled shaft
LF 70
$400
$28,000
Steel H-piling 12"
LF 2,100
$75
$158,000
Structural concrete
CY 375
$600
$225,000
Reinforcement bars
LBS 75,000
$2
$150,000
Purchase and set bridge sections LF 960
$2,200
$2,112,000
Bearing assembly
EA 28
$2,200
$62,000
36-in force main and casing pipe LF 800
$1,000
$800,000
36-in vertical piping and support EA 2
$150,000
$300,000
60" gravity by microtunnel
LS 1 $5,793,000
$5,793,000
Subtotal $10,458,000
Contingency $3,137,000
Total $13,595,000

03
Selected
Alternative

Alt 1: Microtunneling
• Advantages:
• Lowest environmental impacts.
• Does not require construction in the river.
• Disadvantage:
• It, and Alternative 2, have the highest construction cost.
• Due to geology, pipes will need to be installed at significant depths that impacts depths of
upstream and downstream pipe sections and the proposed pump station.
• The size and depths of the tunnel shafts, up to 50-feet in depth, presents significant
construction challenges and risks, may require lengthy closures of adjacent major road,
greenways and areas of the park.

Alt 2: Horizontal Directional Drill
• Advantage:
• Lowest ground disturbance alternative.
• Does not require construction in the river.
• Disadvantage:
• It, and Alternative 1, have the highest construction cost.
• Higher risk of environmental impacts with drilling fluids escaping bore hole and getting into
the river.
• Can only be used for installing the force mains, cannot be used for installing the gravity
sewer.
• The force main pipes will need to be installed diagonally across the river due to the railroad
tracks on the east side making the crossing length significantly longer than the other options.

Alt 3: Open Cut Trench
• Advantages:
• Most accurate method of getting the pipes installed along the required alignment and at the
required elevations.
• Lowest cost alternative.
• Disadvantages:
• Requires construction in the river and Impacts use of the river during construction of the
cofferdams and pipe installation.
• Higher construction traffic impacting public.
• Potential for construction delays and additional costs with large rainfall events.

Alt 4: Pedestrian / Utility Bridge
• Advantages:
• Provides benefit to community by connecting greenways on each side of the river.
• Disadvantages:
• Requires construction in the river and Impacts use of the river during construction of the in -
river piers.
• Has negative impacts to the force main pipe hydraulics as it requires the sewer flow to rise
and fall vertically to get from below ground pipe to exposed pipe across the bridge.
• Can only be used for installing the force mains, cannot be used for installing the gravity
sewer.
• Having the pipe exposed above the river creates future maintenance challenges and safety
concerns and exposes the pipe to vandalism.

Selected Alternative - Alt 3: Open Cut Trench
• Short -Term:
• All alternatives have significant construction challenges
• Long -Term:
• Alt 3 provides the best system hydraulics
• HDD has deep sag, extends 3 times the length of Alt 3
• Microtunnel increases depth by - 10 to 15', increases pumping
• Bridge has vertical rise and drop, increases pumping
• Alt 3 is best option for future O&M
• HDD is deep, sag can cause wastewater solids to settle in bottom, deep and large pipe will be
difficult to clean
• Microtunnel depth makes it very difficult to access, requires several thousands of feet of 60" gravity
sewer to be in excess of 40' deep
• Bridge requires exposed aerial pipe crossing, difficult to maintain, potential for vandalism, odor and
corrosion concerns

Existing Force Main

04
Environmental
Resources

Jurisdictional Surface Waters
• French Broad River (Stream Index 6-(54.75)
• NC Surface Waters Classification B: Primary Recreation,
• USACE Current Section 10 (Navigable Waters —Asheville Field Office (Dec)
• Wilson Road bridge just south of Brevard on U.S 276.

Federal Protected Species
USFWS Information for Planning and Consultation (IPaC) Species List
Common Name
Scientific Name
Federal Status
Mammals
Gray Bat
Myotis grisescens
Endangered
Northern Long-eared Bat
Myotis septentrionalis
Threatened
Reptiles
Bog Turtle
Appalachian Elktoe*
Clemmys muchlenbergii
Alasmidonta raveneliana
Similarity of Appearance
(Threatened)
Endangered
Flowering Plants
Mountain Sweet Pitcher Plant
Sarracenia rubra ssp. jonesii
Endangered
Virginia Spirea Spiraea virginiana
Threatened
Lichens
Rock Gnome Lichen
Gymnoderma lineae
Endangered
*There is final Critical Habitat. No Critical Habitat within the Project Area

Federal Protected Species
• HDR consulted the North Carolina Natural Heritage Program (NCNHP) Element
Occurrence database for protected species distribution and proximity to the Study
Area.
• The NCNHP database revealed that there are known occurrences of Appalachian
Elktoe within the Project Area.
• The NCNHP database revealed that there are known occurrences of Appalachian
Elktoe (2017-09-29) and Gray Bat (2019-07-16) within a one -mile radius of the
Project Area.
• Surveys for federally protected species (Appalachian Elktoe and bats) may be
requested by USFWS and NC Wildlife Resources Commission.

Cultural Resources
• The alignment for the proposed 60-inch Gravity Sewer has been shifted to avoid
impacts to known Cultural Resources on the Biltmore Property.
• Seramur & Associates - Geomorphic Investigation of the French Broad River for
the Carrier Bridge Project (reported dated May 30, 2021) — upgrade existing
sewer line.
• Fourteen hydraulic push cores or Geoprobes cores were drilled across the study area
(east side of river) to assess the potential for cultural horizons.
• The only cultural deposits recorded were historic and likely related to the adjacent
railyard.
• Proposed activities for the replacement of the sewer line will not result in the
disturbance of prehistoric alluvial deposits along the French Broad River.

05
Environmental
Permitting

Clean Water Act Section 404/401
• Proposed Impacts Jurisdictional Surface Waters for Preferred Option (Open Cut)
• Unavoidable impacts to the French Broad River associated within the temporary fill and de -
watering for the cofferdam.
• Excavation of the river bottom associated with installation of the proposed 60-inch gravity main
and parallel 36-inch sewer force mains pipes.
• Does this the preferred option qualify for Section 404 Nationwide 58 (Utility Lines
Activities for Water and Other Substances) and Section 401 Water Quality
Certification No. 4276?

Agency Coordination
• Coordination with NCWRC to comply with USACE Nationwide Regional Condition
3 regarding Trout Watersheds.
• Trout construction or riparian tree clearing moratorium?
• Not subject to State Riparian buffer rules.
• Coordination with USFWS and NCWRC
• Coordination with SHPO/THPO
• Coordination with local Floodplain Coordinator

Potential Avoidance and Minimization Measures
• Minimize the cofferdam footprint and excavation impacts to the greatest extent practical.
• The pipe will be buried at a sufficient depth below the existing stream bed to protect the sewer
line and prevent exposure in the channel. Cap with hard rock fill.
• Detail construction sequencing
• Contingency plan for cofferdam.
• Stabilization of the adjacent riverbanks during construction. Bioengineering techniques using
native vegetation will be implemented too permanently stabilize the riverbanks.
• Safety plan for recreational boating/floating.
• Seasonal clearing and construction restrictions for trout waters or protected species.
• Appalachian Elktoe Mitigation Plan
• Development of a robust Erosion and Sediment Control Plan to prevent sedimentation impacts
to aquatic resources.
• Develop a restoration plan for temporary fill removal including a detailed description on how
pre -project conditions will be restored.

2
Attachment 2 - Completed
Agent Authorization Form

F�2
hdrinc.com
AGENT AUTHORIZATION FORM
I, Darin Prosser, hereby certify that I have authorized Eric Mularski, representing HDR
Engineering, Inc. of the Carolinas, to act on my behalf and take all actions necessary to
the processing and issuance of the Section 404 Nationwide Permit and Section 401 Water
Quality Certification associated with the Carrier Bridge Pump Station Replacement Project
located in Buncombe County, North Carolina.
We hereby certify that the information submitted in this application is true and accurate to
the best of our knowledge.
Darin Prosser
Applicant's Name
Applicant's Signature
Eric Mularski
Agent's Name
Agent's Signature
2/15/2023 2/15/2023
Date Date
440 South Church Street Suites 900 & 1000, Charlotte, NC 28202-2075
T 704.338.6700 F 704.338.6760

3
Attachment 3 - Project Maps
and Figures

Broad St
E Chestnut cr
LEGEND
Project Limits
Proposed Access Route
DATA SOURCE: ESRI World Topographic
Basemap
• •
Emma
o-
Crowne Plaza
Tennis & Golf
Resort
en Hill
0 0 5 netery
Miles Hazel Green
Project Location
oreriztraillr
Buncombe County, NC
Wilshire Park 19
c o4 �
Ga
a 0a
0
?Reaverview Rao in
d a
CDOO
Malvern Hills
a
Sand
191
2257 ft
Asheville
Outlets
191
Wester/y Rd
LL
d
0)
West Asheville
O
-o
z
2
>
0
2
Pisgah View
Carrier Park
2214 ft
d•
/ry Rd
Vchi= 0)
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
F)1
0
)S
AmboyaR
Winer
v
Mission Health
Mission
Hospital
Oakland Rd
Asheville -Buncombe
Tech Cmty Col
d
o' Mead°
Existing Carrier Bridge
Pump Station
Old Rid9
O\aFerry Rd
a
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aC.
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Po
erI-ark Rd a
Fre9
od
o-
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t P
cti
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PROJECT LOCATION MAP
Figure 1
ACLTSMADAGIS DATAGIS IE. ECTS 7I MSD BUNCOMBEDEI, ET CARRIERBRIDEEPS UPDATED\]^_ AAP\MAP DOCSMSO CARRIIERBRIDGE ISACE APRA DATE 2/22/20^_D
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

dc'triski7'Q M;
-tc'r
LEGEND
Project Limits
Proposed Access Route
Topographic Quadrangles
DATA SOURCE: USGS 24k Topographic Map -
USA Topo Maps GIS Service
• •
0 2,000
1 inch = 2,000 Feet
1)
i�'• '1
FIN
AZ FOP
EVILLE
QUADRANGLE
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
USGS TOPOGRAPHIC QUADRANGLE
Figure 2
\\CLTSMAIN\GIS_DATA\GISPROJECTS4B7 I_MSD_BUNCOMBE\101943B0_CARRIERBRIDGEPS_UPDATED\] 2_VNP\MAP_DOCSM SO CARRIERBRIDGE USACEAPRX DATE. 3/20/2023:
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Proposed Pump Station
Existing Pump Station
Proposed 60-inch Gravity Sewer
Proposed 60-inch Gravity Sewer
Replacement
Proposed 54-inch Gravity Sewer
Rehabilitation
Proposed 36-inch Force Mains
Existing 24-inch DIP Force Main
Existing Gravity Sewer Pipes
DATA SOURCE: Bing Maps Hybrid Aerial Imagery
••
0 600
Feet
French Broad River
F)1
,n
Granada Ave
54" Rehabilitation
with CIPP
Existing 54"
Gravity Sewer
Replace 54" Gravity
Sewer with
60" Gravity Sewer
The French
River, rk
Fren
Broad
River
Replace 48" Gravity
Sewer with
60" Gravity Sewer
Existing 48" Gravity Sewer
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
EXISTING AND PROPOSED FACILITY MAP
Figure 3
\\CLTSMAIN\GIS DATA\GIS\PROJECTS\4671 MSD BUNCOMBE\10194380 CARRIERBRIDGEPS UPDATED\7.2 WIP\MAP DOCS\MSD CARRIERBRIDGE USACE.APRX DATE: 2/23/2023
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Construction Work Area
Soil Map Unit
Hydric Rating
1-32%
66-99%
100%
DATA SOURCE: USDA NRCS Web Soil
Survey (2021)
0 250
Feet
FY
60W
The French Broad River Park
tl\yeNeW pr
v q
French Broaa
River
rt
French Broad
River
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
NRCS SOIL MAP
Figure 4A
\\CLTSMAIN\GIS_DATA\GISPRCJECTS14B]1_MSD_BUNCOMBE\101B43B0_CARRIERBRIDGEPS_UPDATED\] 2_VNP\MAP_OOCS\M SD CARRIERBRIDGE_USACEAPRX DATE 2/23/2023
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Construction Work Area
Soil Map Unit
Hydric Rating
1-32%
66-99%
X — 100%
DATA SOURCE: USDA NRCS Web Soil
Survey (2021)
0 120
Feet
French Broad River
French Broad River
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
•
NRCS SOIL MAP
Figure 4B
ACLTSMADAGIS_DATA.IISIE. ECTS462I MSD_eUNWMBED 01043e0_CARRIERBRIDEEPS_UPDATEDD2_ANP‘MAP_oocsMSO_CARRIERBRIDGE_u SACEAPRA DATE 2/23/2023
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

FEGEND
SOURCE: Bing Maps Hybrid Aerial
ry
Construction Work Area
Delineated Wetlands*
Delineated Streams/Rivers*
Three Oaks PJD Study Area
Projected Jurisdictional
Waters**
USGS National Hydrography
Dataset
USFWS National Wetlands
Inventory
*Surface waters were delineated by
Three Oaks Engineering and HDR.
"Stream/river delineated limits have
been projected based on prior
delineation survey data and aerial
review to reflect alignment changes
for the proposed river crossing that
occurred after the on -site delineation
survey.
0
•s
Feet
250
eLM
ki.t
i
The French Brr,ad river Park
Carrier Par Figure 5A
French
Broad
River
2,000
Feet
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
. Ww
•
WATERS AND WETLAND RESOURCES
Figure 5A
ACLTSMAIAGIS DATA.IIS IE.ECTS 7I MSD BUNWMEEMIE43ET CAR IERBRIDEEPs iiPDATEon^ AMPAMAP GOCSMSOSARRIERBRIDGET ISACEAPRA DATE 2R7/v0^4
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Construction Work Area
Delineated Wetlands*
Delineated Streams/Rivers*
Three Oaks PJD Study Area
Projected Jurisdictional
Waters**
USGS National Hydrography
Dataset
USFWS National Wetlands
Inventory
--i-.+ ,wAImy'S_
DATA SOURCE: Bing Maps Hybrid Aerial
Imagery
*Surface waters were delineated by
Three Oaks Engineering and HDR.
"Stream/river delineated limits have been
projected based on prior delineation
survey data and aerial review to reflect
alignment changes for the proposed river
crossing that occurred after the on -site
delineation survey.
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
WATERS AND WETLAND RESOURCES
Figure 5B
ACLTSMADAGIS DATAGIS IEDDECTS 7I MSO BUNCOMBED 01.,DET CARRIERBRIDEEPS UPDATED\]^_ NIP\MAP DOCSTAD CARRIERBRIDGE ISACE APRA DATE 221DD,
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Construction Work Area
Delineated Wetlands*
Delineated Streams/Rivers*
Three Oaks PJD Study Area
Projected Jurisdictional
Waters**
USGS National Hydrography
Dataset
USFWS National Wetlands
Inventory
DATA SOURCE: Bing Maps Hybrid Aerial
Imagery
*Surface waters were delineated by
Three Oaks Engineering and HDR.
"Stream/river delineated limits have been
projected based on prior delineation
survey data and aerial review to reflect
alignment changes for the proposed river
crossing that occurred after the on -site
delineation survey.
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
ACLTSMADAGIS DATAGIS IE. ECTS 7I MSD BUNCOMBEDEI,DEE CARRIERBRIDGEPS UPDATED\]^_ NIP\MAP DOCSTAD CARRIERBRIDGE ISACE APRA DATE MEDD,
WATERS AND WETLAND RESOURCES
Figure 5C
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

A,
LEGEND
Project Limits
Buncombe County Parcels
*Public Right -of -Way
o associated with Lyman Street,
Norfolk Southern Railway, and
Wilma Dykeman Greenway.
DATA SOURCE: ESRI World Topographic
Basemap
••
0 500
erly Rd W
'view Rd
h
#20: PROGRESS ENERGY
a OF THE CAROLINAS FKA
??CAROLINAPOWER AND LIGHT
co
O'`
#25: CITY OF
ASHEVILLE
#21: V G
ENTERPRISES
\ LLC #24: FOUNDATION
I STUDIOS LLC
##22: V JTS
AUTO INC
#23: FOUNDATION
STUDIOS LLC
is Ave
Peace St
#14:
RIVERLINK
INC
F)2
#18: METROPOLITAN
SEWERAGE DISTRICT
OF BUNCOMBE COUNTY
#16: CITY OF
ASHEVILLE
#6: BILTMORE
COMPANY
..orV Rd
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
Lri
0 0
rD S
'O 0
0us
N de Sr
h
tP
PUBLIC
RIGHT=OF-WAY* `r
s
J� s
w
#27: CITY OF
ASHEVILLE
#26:
CITY
"OF ASHEVILLE
sr
Livingston
Street Park
Palmer St
Southern St
Scott ;
Walton St
Walton Street
Park
I ' \
#30:
SOUTHERNs
RAILROAD
CO
#29: ROBERT
#28: BURRIS
ASHEVILLE HEIRS
RIVER
RECREATION
INC
PROPERTY OWNERS
Figure 6A
ACLTSMADAGIS DATAGIS IE. ECTS 7I MSE BUNCOMBEDEI,DET CARRIERBRIDGEPS UPDATED\]^_ NIP\MAP DOCSTAD CARRIERBRIDGE ISACE APRA DATE 221DD,
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Project Limits
Proposed Access Route
Buncombe County Parcels
DATA SOURCE: ESRI World Topographic Basemap
• •
0
s
m
O
#2: CITY OF
ASHEVILLE
er
Broad R\v/
Feet
F)1
500
Vl rgl hia Ave
#8: 521
AMBOY LLC
#7;WILSON TONY
M;WILSON,ANN B
#6: BILTMORE COMPANY
#10: FLORA
J WILSON
REVOCABLE TRUST
#9: 521
AMBOY
LLC
VI
L
°J
c a
m
LL CO
Piercy St
tP
Carob Pve
#12
RIVER
IN(
0
c
#11: CITY OF
ASHEVILLE
Fifth Ave
State St
Stewart St
2101ft
Pisgah View
Cordova St
#12: CITY OF
ASHEVILLE
#3-SAND
STONE PROPERTIES
LLC
Carrier Pa
Fren h Broad River
#47HARRINS
SAND 7r,r7a
AND GRAVEL LLC
#13: CITY OF
ASHEVILLE
#5: RIVER FRONT
STUDIO
/----- 'LLC
21
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
PROPERTY OWNERS
Figure 6B
\\CLTSMAIN\GIS DATA\GIS\PROJECTS\4671 MSD BUNCOMBE\10194380 CARRIERBRIDGEPS UPDATED\7.2 WIP\MAP DOCS\MSD CARRIERBRIDGE USACE.APRX DATE: 2/27/2023
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Project Limits
Proposed Access Route
Buncombe County Parcels
DATA SOURCE: ESRI World Topographic
Basemap
r 1
#7,WILSON TOY #9: 521
M;WILSON,ANN B AMBOY�
LLC
••
0 700
F)1
#6: BILTMORE COMPANY
#6: BILTMORE COMPANY
#1: WEST RANGE LLC
2183ft
Daj
Pa
hp
/-NO IC V ILL.
STONE
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
PROPERTY OWNERS
Figure 6C
ACLTSMADAGIS DATAGISPRQIECTS 7I MSD BUNCOMBEDEI,DEE CARRIERBRIDGEPS UPDATED\]^_ NIP\MAP DOCSTAD CARRIERBRIDGE ISACE APRA DATE MEDD,
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Project Limits
Proposed Access Route
Floodway
100-Year Flood Zone
500-Year Flood Zone
DATA SOURCE: Bing Maps Hybrid Aerial
Imagery
••
Feet
2,000
• u
F)1
'BURTON WESTWOOD PLACE.
o-' STREET ' �`
UCEMONT' '� - 4�.`r`
CIRCLE -% I� ��
a .n,,.5t , 'II r
NT-LOUISIANA —
'-Mnllcne Ave
..I. --MAW,'
Ave
-Sr .,:'Ave .
S.o .}. - - " 41
N ' t $ x s
8�p4�
rrei 1�J a�+- . ysq 5
4• i9 v 2-`q �:-,, Ll 1r><'t, :
Pea_
e5 tent,eu:
-�� - ` C P`e
rench Broa1 a ♦ �+ l�• �
3dr mote v,••'ef �r
Fren;'
Eroad
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
FEMA FLOOD ZONES
Figure 7
ACLTSMADAGIS DATA.IISPRQI ECTS 7I MSO BUNCOMBE\101043ET CARRIERBRIDGEPS UPDATED\]^_ AMP\MAP DOCSMSD CARRIERBRIDGE ISACE APRA DATE 223/20^_3
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
C
AigincitEZVIWIal
Construction Work Area
Proposed Pump Station
Existing Pump Station
Proposed Cofferdams (stage 1)
Proposed Cofferdams (stage 2)
Proposed 60-inch Gravity Sewer
Proposed 60-inch Gravity Sewer
Replacement
Proposed 36-inch Force Mains
Proposed 54-inch Gravity Sewer
Rehabilitation
Proposed Rock Slope Protection
Proposed Access Route
Delineated Wetlands*
Delineated Streams/Rivers*
Projected Jurisdictional Waters**
DATA SOURCE: Bing Maps Hybrid Aerial Imagery
*Surface waters were delineated by Three Oaks
Engineering and HDR.
"Stream/river delineated limits have been
projected based on prior delineation survey
data and aerial review to reflect alignment
changes for the proposed river crossing that
occurred after the on -site delineation survey.
1
0 400
Feet
F)1
Proposed Rock Slope Protection:
300.25 Linear Feet
Impact Number: S2
Impact Type: Dewatering/Excavation (Pipe Installation)
Impact Duration: Temporary
Stream Type: Perennial (French Broad River)
Impact Area: 50 Linear Feet (0.30 Acres)
River Park
Impact Number: S1
Impact Type: Fill (Cofferdam)
Impact Duration: Temporary
Stream Type: Perennial (French Broad River)
Impact Area: 100 Linear Feet (0.92 Acres)
Proposed Rock Slope Protection:
300.72 Linear Feet
French
Broad.
RIY'
Impact Number: W1
Impact Type: Matting
Impact Duration: Temporary
Wetland Type: Emergent
Impact Area: 0.08 Acres
Oakland Rd
Tahkieostie Dr
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
POTENTIAL IMPACTS TO WATERS OF THE U.S.
Figure 8A
\\CLTSMAIN\GIS_DATA\GIS\ PROJECTS \4671_MSD_BUNCOMBE\ 10194380_CARRIERBR IDGEPS_UPDATED\7 2_WIPWIAP_DOCS\MSD_CARRIERBRIDGE_USACE APRX DATE. 2/28/2023
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

LEGEND
Construction Work Area
Proposed Cofferdams (stage 1)
Proposed Cofferdams (stage 2)
Proposed 60-inch Gravity Sewer
Proposed Rock Slope Protection
Proposed Access Route
Delineated Wetlands*
Delineated Streams/Rivers*
Projected Jurisdictional Waters**
DATA SOURCE: Bing Maps Hybrid Aerial Imager,
*Surface waters were delineated by Three Oaks
Engineering and HDR.
"Stream/river delineated limits have been
projected based on prior delineation survey
data and aerial review to reflect alignment
changes for the proposed river crossing that
occurred after the on -site delineation survey.
F)1
•
•
Proposed Rock Slope Protection:
474.62 Linear Feet
Impact Number: S3
Impact Type: Fill (Cofferdam)
Impact Duration: Temporary
Stream Type: Perennial (French Broad River)
Impact Area: 100 Linear Feet (0.87Acres)
Impact Number: S4
Impact Type: Dewatering/Excavation (Pipe Installation)
Impact Duration: Temporary
Stream Type: Perennial (French Broad River)
Impact Area: 50 Linear Feet (0.26 Acres)
\\CLTSMAIN\GIS_DATA\GIS\ PROJECTS \4671_MSD_BUNCOMBE\ 10194380_CARRIERBR IDGEPS_UPDATED\7 2_WIPWIAP_DOCS\MSD_CARRIERBRIDGE_USACE APRX DATE. 2/28/2023
Proposed Rock Slope Protection:
599.45 Linear Feet
MSD CARRIER BRIDGE PUMP STATION REPLACEMENT PROJECT
POTENTIAL IMPACTS TO WATERS OF THE U.S.
Figure 8B
USACE PRECONSTRUCTION NOTIFICATION APPLICATION

4
Attachment 4 - Project
Drawings and Plans

1
2
3
4
5
6
7
8
/ / '// �%j %/`��7 / �/ / i //////, /�//�//i
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// // / / / /ii'/i //' \ -. / / , /// / / /
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/ //// / `j/'% / 1/; / / / / //'/////// /,/////,///// /i / .fir, / / / l /
„ ,/ / / // ///// ° % %% / 7-// / ' /. i /////// / // / / , /// / �6
/ /' / ,vo ,, / / , /, / / / /
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// /, / // �pss ' I
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��2045f /4C'p
_..// / ---/ Q / / 3
�—
-
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14,
/
/
1—
i
/ 100 YEAR I
ELE ION
N-2010—_
r /
/
7
FLQ199S /
Apo
PLO
r2005— — /
LL 2
li ` 30" X 36Y REDUCE-
li / —. �. //
I \^!+ Mil I , 000
1// )
—
2010
2000
1990
36" 45.0° E BOV)1 0
36" 45.0° LBOW
/
/
/
/° co/' / L/
/ I / /
cIo /4TE
/
CHARGE VAULT
REFER TO SHEET 01 C
Z4/
FOR MORE INFORMATION /f/ //-PROPOSED PERA/ NEN' /� SEWER EASEM T /
S Qe4 '00,'3' \\
��C04 6''6, -0 / /
' I ♦ /
✓ I
/
i
o i
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To o° /
/
-7 0 ,1
/ a� I'O, i
//
0' FORCE MAI
RCE MAIN
36_DIP
2+00, A
458 LF 36" DIP
459 LF 36" DIP
FORCE MAIN #2
36" DIP
/
PROPOSED GRADE RETAINING WALL
1980 30"X36" REDUCER (FM #1, #2)
\
/
/
/
/
/ /
Go
;;/' /' ( M'\\
%% it / \ \ 1
; //�/ \ I 1
%l 1, 1 / /
0, /
/
/ I/ 1919
o //
/
_ �/ , 7
/
// / / 7
// / c,,/ /
/w`l , / / / /
/ / ! � % j/ // //
/ / //
r( / / /
-- , • V I /
/'A. -~< • --c-I a_---/ l -��4 ,/
---1
/` /
/ /
1978' -'
EXISTING GRADE
�AFIRRO` CATION
/ FYISTINn
NOT SURVE`-I
EXISTING SANITARY SEWER TO BE
—� "'"BONED IN PLACE.
/ / /
//
/
/
// /
/c,
//
1970
45 DEG BEND (FM #1,#2)
1960
1950
0+00
PROPOSED 10" GRAVITY SEWER
458 LF 36" DIP (FM #1)
0+50 1+00 1+50 2+00
2+50
3+00
3+50
4+00
4+50
22 DEG BEND (FM #1, #2)
45 DEG BEND (FM #1, #2)
5+00
5+50 6+00
6+50
7+00
7+50
2010
2000
1990
1980
1970
1960
1950
8+00
Ick
// ° /c''‘:/1')//:/ 71;
/ /
4,:Cg::/;/
GENERAL NOTES:
1.
KEY NOTES:
1.
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
PRELIMINARY
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
K. QUATTLEBAUM, PE
CHECKED BY
M. SHULTZ, PE
DRAWN BY
C.GIGLIOTTI
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
CP
•
-r z
,94-k
couNry,
CARRIER BRIDGE
PUMP STATION
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
in
36" PARALLEL FORCE MAINS
PLAN & PROFILE 1
2" FILENAME
SHEET
ISSUE DATE DESCRIPTION
PROJECT NUMBER
10194380
SCALE

1
2
3
4
5
6
7
8
19,69
1,0
2010
2000
1990
1980
1970
1960
_ ( � i --- i----• , /,' % 1 / 1
----- --- / / -� L// I
-- f / ,_,..',,4/
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,
•
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\ a •I I I
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00 YEAR
FLObD ELEV
FLOO[ 4
co
43.
190
—
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9.
/
CIQ
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Ics i ......- **—Ki --- --
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•
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/ 4N / ...., o
co
„:c1; / 8 L/
.41' /7/ //7/ 7//
FDRCE MAIN
OERMANYNtz
22.5 DEG BEND (FM #1, #2)
45 DEG BEND (FM #1, #2)
45 DEG BEND (FM #1, #2)
1950
8+00
8+50
9+00
9+50
10+00
10+50
12 LF 36" DIP (FM #1)
22.5 DEG BEND (FM #1, #2)
11+00
11+50
•
7-9
--.. '''..4%.........,,...Z._ i' ,,
STRUCTUR
STA 14+98.
/
o
/ A
FREN
CH BROAD RIVER
MANHOLE NO. 9 (8' DIA) (84") —
STA 14+98.66
RIM = 1976.08
36" IN (SW) IE = 1967.00
42" OUT (NE) IE = 1967.00
45 DEG BEND (FM #1)
22.5 DEG BEND (FM #1, #2)
INV
12+00
12+50
13+00 13+50
CONCRETE ENCASEMENT
14+00
15 LF 42"
15+15.24
682702.6
E 940091.
N 682693.
E 94007
47/
A Zi
„jitrifigl
•
2010
2000
MANHOLE NO. 10 (8' DIA) (84")
STA 15+13.89
RIM = 1976.88 1990
42" IN (SW) IE = 1966.85
54" OUT (NW) IE = 1963.80
22.5 DEG BEND (FM #1, #2)
14+50 15+00
GRAVITY SEWER@ 0.95%
15+50
1970
1960
1950
16+00
//
/71
Is
/77
, GENERAL NOTES:
KEY NOTES:
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
PRELIMINARY
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
K. QUATTLEBAUM, PE
CHECKED BY
M. SHULTZ, PE
DRAWN BY
C. GIGLIOTTI
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
es .41
•
CARRIER BRIDGE
PUMP STATION
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
0
in
36" PARALLEL FORCE MAIN
PLAN & PROFILE 2
2" FILENAME
SHEET
01C304
ISSUE
DATE
DESCRIPTION
PROJECT NUMBER
10194380
SCALE

1
2
4
5
6
7
8
I
®CONNECTTO EX. SEWER
STA 0+00
N 682112.55
E 940471.36
LOD —
r —
14(
13 LF 60"
i
f %
SOUR GUM —1
2000
Iw
1990
1980
1970
1960
DSF
OJT
LOD —
`SSk,,.
RIM: 1,01'
INV: 1,964.4'
w
J
O
2
z
2
0
0
M
O
1-
FLOOD
ZONE AE
—1991-
-1990 -
-1989— OH
l �1.
19L
PROP. 54" GRAVITY SEWER
6" DRAIN PIPE®
DSF
?-nsSOURGI.J
PROP. MANHOLE #1
STA 0+13 3
N 682101.44
E 940478.12
= OHE
100-YEAR FLOOD ELEV.
6" DRAIN PIPE, ®
IE=1975.0
0/—
13 LF 60" @ -0.15%
OHE
=DF1—
CONCRETE CURB
CONCRETE ISLAN
PROP. 60" GRAVITY SEWER
BACK OF CONCRETE CURB
(LIMITS OF DISTURBANCE)
LOD
1+00
190 LF 60"
C--
---2" 1 TI TLELEAF
— LINDEN
UNDERGROUND ---EL--=
10' RIVERBANK BUFFER®
(LIMITS OF DISTURBANCE)
DOUBLE ROW SILT FENCE
LYMAN STREET
PUBLIC RIGHT-OF-WAY
ASPHALT PAVEMENT
LOD-
- — —DSF-
PLAN
SCALE: 1" = 20'
EXISTING GRADE
190LF60" @0.15%
_LOD
DSF
�, • �� x y . •fir a-• 4.�a.�s
��1°�' �.��iT����;�j�4� i4aSr��i elf
197
PROP. STORM MANHOLES
& PROP. 24" RCP STORM DRAIN 7O
SEE SHEET 02C-05
FOR PLAN AND PROFILE
— LOD
PROP. MANHOLE #2
STA 2+03
N 681925.73
E 940549.71
N
0
rn
w
M co
O ocn 1—
N II z O
WQcoco
CONNECT TO EX. SEWER®
a) EX. 54" RCP GRAVITY SEWER
0
rn
N
N
03
rn
-0+25
0+00
0+50
1+00
1+50
FRENCH BROAD RIVER -
3+00
1—
PROPERTY LINE
—DSF—
RIM: 1,981.77'
INV: 1,964.8'
RIP RAP AND
GEOTEXTILE FABRIC
{
PROP. 24" RCP
rz—
STORM DRAIN
SEE SHEET 02C-04
129LF60" @0.15%
2" LITTLELL,
LINDEN
EDGE OF PAVEMENT
—LOD- —
PROP. MANHOLE #3
STA 3+32
N 681802.14
E 940587.72
54" RCP GRAVITY SEWG
N
0
rn
2+00
60" GRAVITY SEWER PROFILE
SCALE: 1" = 20' HORZ.
1" = 5' VERT.
2+50
3+00
IE = 1964.94
I
I
ISF�
I
EDGE OFI
WATER
CD
O
0
0
3+50
I N
_15" R
LODdill!
—
—DSF
INLET PROTECTION
2000
1990
1980
GENERAL NOTES:
1. DRAWING SHEETS 04C-01 AND 04C-02
PROVIDE DRAWING DETAILS FOR SOME OF
THE EXISTING FEATURES. ALL FEATURES
DISTURBED, DAMAGED, REMOVED, ETC.
SHALL BE FURNISHED AND
RECONSTRUCTED PER THE DETAILS AND
EXISTING SITE LAYOUT INCLUDING SIZE,
LOCATION AND ELEVATION.
2. ONLY THE NEWLY PLANTED LANDSCAPE
TREES ARE SHOWN AND LABELED. ALL
TREES LABELED NEED TO BE REPLACED
10-FEET FROM SEWER. ADDITIONAL
TREES AND VEGETATION EXIST
BETWEEN ASPHALT PATH AND RIVER
THAT WILL NEED TO BE CLEARED AND
REMOVED WITHIN THE LIMITS OF
DISTURBANCE.
3. WITH THE EXCEPTION OF MANHOLE #1 (SEE
KEY NOTE), FOR ALL OTHER MANHOLES
CONTRACTOR MAY USE CIRCULAR PRECAST
CONCRETE, T-SERIES PRECAST CONCRETE
OR FIBERGLASS TEE, IN LOCATIONS THAT
ALLOW FOR EACH OPTION.
4. ALL PROPOSED SANITARY SEWER
MANHOLES SHALL HAVE SEALED
WATERTIGHT FRAME AND LID.
5. ALL CONCRETE MANHOLES SHALL INCLUDE
CONCRETE PROTECTIVE LINER.
6. FOR ANY TEMPORARY LANE CLOSURE
OF NORTHBOUND LANE, INSTALL ALL
TRAFFIC CONTROL DEVICES AND
PERFORM FLAGGING PER NCDOT
REQUIREMENTS.
KEY NOTES:
® UNDERGROUND ELECTRIC RUNS ALONG
ENTIRE LENGTH OF WEST SIDE OF
MULTI -USE PATH CONNECTING LIGHT
POLES. REMOVE AND REPLACE AS
REQUIRED AS PART OF PIPE
INSTALLATION.
VERIFY EXISTING GRAVITY SEWER SIZE,
LOCATION AND MATERIAL TYPE.
CONNECT INTO PROPOSED MANHOLE #1.
MANHOLE #1 SHALL HAVE A MINIMUM
INSIDE DIAMETER OF 120", INCREASE IF
NEEDED TO ACCEPT 10" SEWER, AND 60"
RISER UP TO THE CONE SECTION. PRIOR
TO CONSTRUCTION, VERIFY LOCATION
OF 10" SEWER AND ADJUST PROPOSED
MANHOLE LOCATION AS REQUIRED.
CONNECT EXISTING 54" PIPE TO
PROPOSED 60" PIPE USING BURIED
PRECAST JUNCTION STRUCTURE WITH
FLEXIBLE BOOT CONNECTION. MEET ALL
REQUIREMENTS OF PRECAST MANHOLES
AND PROVIDE PROTECTIVE LINING ON
WALLS AND SOLID TOP. PER
MANUFACTURE'S SPECIFICATIONS.
PRECAST CONCRETE STRUCTURE CAN
BE ROUND, RECTANGULAR OR
T-STYLE MANHOLE BASE.
10' BUFFER FROM TOP OF RIVER BANK.
NO TREE CLEARING OR EXCAVATIONS
ALLOWED WITHIN BUFFER. TEMPORARY
BYPASS PIPING CAN BE INSTALLED
WITHIN BUFFER.
® ALL EXISTING MANHOLES AND GRAVITY
SEWER PIPE SHALL BE REMOVED OR
1970 ABANDONED. ANY PIPE SECTIONS NOT
REMOVED SHALL HAVE ALL OPEN ENDS
PLUGGED WITH CONCRETE. ANY
MANHOLES NOT REMOVED SHALL HAVE
TOP 3-FEET REMOVED, ALL PIPE
PLUGGED WITH CONCRETE AND
REMAINING PORTION FILLED WITH
COMPACTED SOIL.
1960
4+00
O7 REMOVE EXISTING STORM MANHOLE
AND PIPE AS REQUIRED TO INSTALL NEW
GRAVITY SEWER AND NEW STORM
SYSTEM.
INSTALL PERFORATED 6" PLASTIC PIPE
WITH SOCK TO SERVE AS A FRENCH
DRAIN. DAYLIGHT IN RIVER BANK.
REDUCE TO SINGLE ROW WHERE
ASPHALT PATH DOES NOT ALLOW
INSTALLATION OF SECOND ROW.
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
A
PRELIMINARY
ISSUE DATE
DESCRIPTION
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
M. SHULTZ, PE
CHECKED BY
S. BEROSET, PE
DRAWN BY
J. KROOSWYK
PROJECT NUMBER
10194380
FRENCH BROAD INTERCEPTOR
REPLACEMENT
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
0
1"
GRAVITY SEWER
PLAN AND PROFILE
STA 0+00 TO STA 4+00
2.. FILENAME
SCALE
00C-UT02-20 ER.dwg
1"=20'
SHEET
02C-01

1
2
3
4
5
6
7
8
1
i
i
0
INLET PROTECTION (TYP.)
RCP — --,_
LOD—ABAI IRONED
STORM PIPE
BACK OF CONCRETE CURB
(LIMITS OF DISTURBANCE)
DSFS- s-
i__
—DSF �_' = GP
54,. R
■ ` �19757--GN1ER
1970—C�
20001
1990
1980
1970
1960
4+00
LODE
5+00
— DSF-
- �
I
4+50
317LF60" @0.15%
5+00
ca
PROP. 60"
GRAVITY SEWER
-S
LOD
_2" E., BUD
EASTERN REDBUD
FRENCH BROAD RIVER-
100-YEAR FLOOD ELEV.
EX. 24" RCP
0
co
0)
5+50
2" LITTLELEtir
LINDEN!
197,.
=1970 __
DOUBLE ROW SILT FENCE
PLAN
SCALE: 1" = 20'
EXISTING GRADE
PROP. MANHOLE #5
STA 6+64
N 681474.21
E 940638.78
PROP. MANHOLE #4
STA 6+49
N 681488.99
E 940637.99
BURIED TRENCH BOXES
AND STEEL PLATE. REMOVE
AND DELIVER TO MSD
—LOD
LOD
SEE SHEET 02C-04
FOR PLAN AND PROFILE
LIGHT POLE O
SRN REDBUD
DSF— DSF—
EDGE OF PAVEMENT
PROPERTY LINE
LYMAN STREET
PUBLIC RIGHT-OF-WAY
ASPHALT PAVEMENT
MULTI -USE PATH (ASPHALT)
UGE---
7+00
2" LITTLELEAF
LINDEN
4'
'NV: 1,ca65-7'
DSF— DSF-
.SEE SHEET 02C-04 -----
SOIL BORING B3 FOR PLAN AND PROFILE
EX. 18" RCP
O/—
O
OD
0)
6+00
PROP. MANHOLE #4
STA 6+49
RIM = 1980.13
60" IN (S) IE = 1965.41
42" IN (W) IE = 1969.41
60" OUT (N) IE = 1965.41
15 LF 60" @ 0.20%
60" GRAVITY SEWER PROFILE
SCALE: 1" = 20' HORZ.
1" = 5' VERT.
24" DIP FORCE
MAIN SEWER
CONCRETE
CURB
1980
2" LITTLELEAF
LINDEN —pSF—
_ _--
10' RIVERBANK BUFFER —
(LIMITS OF DISTURBANCE)
PROP. MANHOLE #5
STA 6+64
RIM = 1980.15
60" IN (S) IE = 1965.44
42" IN (W) IE = 1969.44
60" OUT (N) IE = 1965.44
PROP. 42" GRAVITY SEWER
SEE SHEET 02C-04
03
6+50
UGE
48" RC
GRAVIT`''
380 LF 60" @ 0.15%
co
O
co
0)
7+00
CORRUGATED CONCRETE
ISLAND FOR EMERGENCY
VEHICLE ACCESS
1
—LOD_
I \
8+ 0 \
r -
x
—UNDER.,
/DSF
0
03
CI
7+50
SEE SHEET 02C-03
2000
1990
1980
1970
1960
8+00
GENERAL NOTES:
1. DRAWING SHEETS 04C-01 AND 04C-02
PROVIDE DRAWING DETAILS FOR SOME
OF THE EXISTING FEATURES. ALL
FEATURES DISTURBED, DAMAGED,
REMOVED, ETC. SHALL BE FURNISHED
AND RECONSTRUCTED PER THE DETAILS
AND EXISTING SITE LAYOUT INCLUDING
SIZE, LOCATION AND ELEVATION.
2. ONLY THE NEWLY PLANTED LANDSCAPE
TREES ARE SHOWN AND LABELED. ALL
TREES LABELED NEED TO BE REPLACED
10-FEET FROM SEWER. ADDITIONAL
TREES AND VEGETATION EXIST
BETWEEN ASPHALT PATH AND RIVER
THAT WILL NEED TO BE CLEARED AND
REMOVED WITHIN THE LIMITS OF
DISTURBANCE.
3. ALL PROPOSED SANITARY SEWER
MANHOLES SHALL HAVE A MINIMUM
INSIDE DIAMETER OF 96-INCHES, HAVE
SEALED WATERTIGHT FRAME AND LID,
AND INCLUDE CONCRETE PROTECTIVE
LINER.
4. FOR ANY TEMPORARY LANE CLOSURE
OF NORTHBOUND LANE, INSTALL ALL
TRAFFIC CONTROL DEVICES AND
PERFORM FLAGGING PER NCDOT
REQUIREMENTS.
KEY NOTES:
0 UNDERGROUND ELECTRIC RUNS ALONG
ENTIRE LENGTH OF WEST SIDE OF
MULTI -USE PATH CONNECTING LIGHT
POLES.
O2 10' BUFFER FROM TOP OF RIVER BANK.
NO TREE CLEARING OR EXCAVATIONS
ALLOWED WITHIN BUFFER. TEMPORARY
BYPASS PIPING CAN BE INSTALLED
WITHIN BUFFER.
ALL EXISTING MANHOLES AND GRAVITY
SEWER PIPE SHALL BE REMOVED OR
ABANDONED. ANY PIPE SECTIONS NOT
REMOVED SHALL HAVE ALL OPEN ENDS
PLUGGED WITH CONCRETE. ANY
MANHOLES NOT REMOVED SHALL HAVE
TOP 3-FEET REMOVED, ALL PIPES
PLUGGED WITH CONCRETE AND
REMAINING PORTION FILLED WITH
COMPACTED SOIL.
REDUCE TO SINGLE ROW WHERE
ASPHALT PATH DOES NOT ALLOW
INSTALLATION OF SECOND ROW.
CONNECT EXISTING FORCE MAIN INTO
PROPOSED MANHOLE #8 USING
FLEXIBLE CONNECTION, 36" PIPE
SECTION AND REDUCER. CUT EXISTING
24" PIPE AS REQUIRED, INSTALL SOLID
SLEEVE AND FITTINGS AS REQUIRED TO
MAKE CONNECTIONS. ALL FORCE MAIN
PIPE AND FITTINGS SHALL BE
RESTRAINED JOINT, PROTECTO 401
LINED DUCTILE IRON. SEE SHEET 02C-04.
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
A
PRELIMINARY
ISSUE DATE
DESCRIPTION
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
M. SHULTZ, PE
CHECKED BY
S. BEROSET, PE
DRAWN BY
J. KROOSYWK
PROJECT NUMBER
10194380
•
c0� �949 9 aWlat\ GPP
%NTY, NeP\\\
SEWEgq�F
•
FRENCH BROAD INTERCEPTOR
REPLACEMENT
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
0
1"
GRAVITY SEWER
PLAN AND PROFILE
STA 4+00 TO STA 8+00
2" FILENAME
SCALE
00C-UT02-20 ER.dwg
1"=20'
SHEET
02C-02

1
2
4
5
6
7
8
GENERAL NOTES:
1
i
t
I
I\
- —LOD-
i
i
UNDERGROUND
-ELECTRIC DSF-
CORRUGATED CONCRETE ISLAND
FOR EMERGENCY VEHICLE ACCESS
BACK OF CONCRETE CURB
(LIMITS OF DISTURBANCE)
0
co
0'
• - --
H O
W
z
J
2
2
i
PROP. 60"
GRAVITY SEWER -
- HAND RAIL
48" RCP
1980
'-2'` SOUR CUM— -
DSp
INLET PROTECTION
rn�
CONCRETE
CURB
2" SWAMP WHITE OAK
LIGHT POLE'
\ _ -2" SOUR GUM
DSF
'970.'
t •
„
\ 48 ItCP GRAVITY SEWF
10' RIVERBANK BUFFER
(LIMITS OF DISTURBANCE)
Alt
EDGE OF PAVEMENT
PROPERTY LINE
c LYMAN NTREET
PUBLIC RIGH -OF-WAY
ASPHALT PA(EMENT
-
WETLAND
-DSF ��
DOULBE ROW
SILT FENCE-- __
-FRENCH BROAD RIVER-
2000
EDGE OF WATER
1990 = .—..-
1980
1970
1960
8+00
TBM 60d NAIL W/ SHINER
ELEV: 1,992.46'
2" SWAMP\WHITE OAK (5)��,
1, METAL POWER
TRANSMISSION
POLE
a
O4
DSF- ,-
DUKE ENERGY
HIGH VOLTAGE
OVERHEAD ELETRIC
00-YEAR FLOOD ELEV.
SIGN
2" SWAMP WHITE OAK
SSM,
RIM: 1,98/.50'
INV: 1,966.0'
1(POLE SUPPORT_
-WIRES (TYP.) -
,., ? 985 _
PROP. MANHOLE #6
STA 10+44
N 681094.75
E 940658.95
411.
--
PLAN
SCALE: 1" = 20'
-\
RA
/-
9j5 \\
970,E\\�
Alt
O' >G
0'
w
0
EXISTING 48" GRAVITY SEWER I
(TO REMAIN IN SERVICE) \ I1 11
I I
�1lll 1 1
48" RCP GRAVITY
SEWER
8+50
EXISTING
380 LF 60" @ 0.15%
9+00
▪ -
•
VENT PIPE OPENING
ELEV = 1992.0
0
w
J
0
Z
2
o_
0
o-
2000
— 1990
9+50
60" GRAVITY SEWER PROFILE
SCALE: 1" = 20' HORZ.
1" = 5' VERT.
10+00
1980
EXISTING 48" GRAVITY SEWER
1970
CONNECT EXISTING 48"
GRAVITY SEWER INTO
PROPOSED MANHOLE
10+50
1960
10+75
TBM CHISLED "X"
EL : 1,995.10'
CONCRETE
o TSB/
1. DRAWING SHEETS 04C-01 AND 04C-02
PROVIDE DRAWING DETAILS FOR SOME
OF THE EXISTING FEATURES. ALL
FEATURES DISTURBED, DAMAGED,
REMOVED, ETC. SHALL BE FURNISHED
AND RECONSTRUCTED PER THE DETAILS
AND EXISTING SITE LAYOUT INCLUDING
SIZE, LOCATION AND ELEVATION.
2. ONLY THE NEWLY PLANTED LANDSCAPE
TREES ARE SHOWN AND LABELED. ALL
TREES LABELED NEED TO BE REPLACED
10-FEET FROM SEWER. ADDITIONAL
TREES AND VEGETATION EXIST
BETWEEN ASPHALT PATH AND RIVER
THAT WILL NEED TO BE CLEARED AND
REMOVED WITHIN THE LIMITS OF
DISTURBANCE.
3. ALL PROPOSED SANITARY SEWER
MANHOLES SHALL HAVE A MINIMUM
INSIDE DIAMETER OF 96-INCHES, HAVE
SEALED WATERTIGHT FRAME AND LID,
AND INCLUDE CONCRETE PROTECTIVE
LINER.
4. FOR ANY TEMPORARY LANE CLOSURE
OF NORTHBOUND LANE, INSTALL ALL
TRAFFIC CONTROL DEVICES AND
PERFORM FLAGGING PER NCDOT
REQUIREMENTS.
KEY NOTES:
UNDERGROUND ELECTRIC RUNS ALONG
ENTIRE LENGTH OF WEST SIDE OF
MULTI -USE PATH CONNECTING LIGHT
POLES.
10' BUFFER FROM TOP OF RIVER BANK.
NO TREE CLEARING OR EXCAVATIONS
ALLOWED WITHIN BUFFER. TEMPORARY
BYPASS PIPING CAN BE INSTALLED
WITHIN BUFFER.
0. ALL EXISTING MANHOLES AND GRAVITY
SEWER PIPE SHALL BE REMOVED OR
ABANDONED. ANY PIPE SECTIONS NOT
REMOVED SHALL HAVE ALL OPEN ENDS
PLUGGED WITH CONCRETE. ANY
MANHOLES NOT REMOVED NOT
REMOVED SHALL HAVE TOP 3-THREE
REMOVED, ALL PIPES PLUGGED WITH
CONCRETE AND REMAINING PORTION
WITH COMPACTED SOIL.
LIMIT DISTURBANCE TO WETLAND AREA
TO THE EXTENT POSSIBLE. INSTALL
TEMPORARY GEOTEXTILE FABRIC
BEFORE PLACING ANY TEMPORARY FILL.
FOLLOWING CONSTRUCTION RESTORE
TO PRE -CONSTRUCTION ELEVATIONS
AND PLAN SPECIAL WETLAND SEED MIX.
REDUCE TO SINGLE ROW WHERE
ASPHALT PATH DOES NOT ALLOW
INSTALLATION OF SECOND ROW.
RESTORE ALL SLOPE DISTURBED
BETWEEN STA 8+50 AND MANHOLE #5
WITH EROSION CONTROL MATTING, SEE
DETAIL 7/03C-04.
COMPLY WITH ALL OSHA, DUKE ENERGY
AND OTHER APPLICABLE GUIDELINES
AND SAFETY STANDARDS FOR WORKING
NEAR AND UNDER HIGH VOLTAGE
ELECTRICAL LINES. CONTRACTOR IS
RESPONSIBLE FOR COORDINATING ALL
WORK WITH DUKE ENERGY.
FURNISH AND INSTALL HOBAS CLOSURE
COUPLING OR APPROVED STAINLESS
STEEL REPAIR SLEEVE TO JOIN PIPE
ENDS. INCLUDE COST AS PART OF THE
60" PIPE INSTALLATION.
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
A
PRELIMINARY
ISSUE
DATE DESCRIPTION
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
M. SHULTZ, PE
CHECKED BY
S. BEROSET, PE
DRAWN BY
J. KROOSVVYK
PROJECT NUMBER
10194380
cz-
FRENCH BROAD INTERCEPTOR
z-=1) REPLACEMENT
•
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
GRAVITY SEWER
PLAN AND PROFILE
STA 8+00 TO STA 10+39
2.. FILENAME
SCALE
SHEET

1
2
3
4
5
6
7
8
•
ou
ou
GENERAL NOTES:
•
•
•
•
•
•
•
•
t.
.s.,, (c) A 4- /
co I
•
•
175L`FOF10' \�
GRAV\TY SE*ER
•
2010
•
•
•
•
CONSTRUCTION
EAStEMENT
•
•
LA
PROPOSED-3V' FORCE MAINS—
•
•
'' '1
0
2000
PROPOSED —\ cf)
GRADE
PROPOSED 8'
1990 RETAINING WALL
1980
1970
1960
1950
PUMP STATION
0
0
N 681465.54
E 939957.09
•
0 iv
▪ CO W
1-0
oU
ou
•
•
•
N.
50' SEWER EASEMENT
10' TEMPORARY-.,
CONSTRUCTION
EASEMENT
•
i ir.-
co
61, FORCE MAIN
FLOODWAY
0.
•
41020101107
oU
7-;e: ' „../. I /17/ I -- -- - - --
"Jr; , I__ ----
•
OUTSIDE DROP
239 LF OF 60"
GRAVITY SEWER
00e—
O.
▪ •
FRE.1404 BROAD
RIVER PP1/41:11(
110,
•
•
•
— — 5443:00;0000:2 E 940262.17 ---- -- _.....
---1-21-EF OF 60" GRAVITY SEWER
•
-
le
— —
IL I
if ,,, ,x0,,, , I\9\.75.,..,N, :___m_.A,,0;:itioQ0_:/, ::::: r .,,,,,,it.z,..71,:///s,j,ii,,:4\,\10_0;_. ____
/ /
it
' ________ _-_---°!-U- --- ...._-____ :::---- --- ----- --1 W ''''.7' '4‘-4C)''/4111 ck
•
•
•
1-----1:1- :17,01 8 .D2, Ili/lir
V— ><•—cy— —7 r — ,---=-71A-5,= __ ___ ---- -------->. i w .?.•%-- -V,,,' Lt, -
06,
PAVEttiVr
/
es
-
•
EXISTING 48"
GRAVITY SEWER ketab' -
ss
----------------------------
--------------
35 LF OF 60"
0
CO
CO
/ / CV ,
0
rm
239 LF OF 60" PIPE @ 0.20%
•
100 YEAR
MANHOLE
RIM: 1,986.97
INV IN: 1,972.6
—r
100 YEAR FLOOD ELEVATION
1/-
EXISTING GRADE
•
RIM: 1,986.95
INV: 1,961.24
0
35 LF OF 60" PIPE @ 0.28%
0+00 0+50 1+00 1+50 2+00
2+50
3+00
3+50
4+00 4+50
5+00 5+50
07.
cn
/
Ey
•
•
co
1.0
cri
co
MANHOLE
RIM: 1,982.69
INV: 1,960.0
90 LF OF 84"
STEEL CASING PIPE
121 LF OF 60" GRAVITY SEWER
ur-
t co
EXISTING 48"
GRAVITY SEWER
90 LF OF 84" STEEL CASING PIPE INSTALLED
BY TRENCHLESS CONSTRUCTION
METHODS PER SPECIFICATIONS
(MINIMUM PIPE THICKNESS = 0.75")
OUTSIDE DROP —\\•
123 LF OF 60" PIPE @ 0.34%
6+00
6+50 7+00
oi
CO
ir
BRIDGE
EL 1994.55'1
FLOODWAY
6
(JUNCTION MANHOLE)
N 680903.34
E 940273.30
28 LF OF 48" GRAVITY SEWER
11
cr c• o
Lu
0
CO II Z 0
•
•
0 co
0 +
7+50
8+00
co zo
cn
(REPLACE EXISTING
MANHOLE WITH NEW
DROP MANHOLE)
N 680878.68
E 940260.85
TEMPORARY
CONSTRUCTION
EASEMENT
-FRENCH BROAD RIVER-
OUTSIDE DROP
28 LF OF 48" PIPE @ 0.20%
8+50
9+00
2010
2000
1990
1980
— 1970
— 1960
1950
1. ALL MANHOLE RIMS SHALL BE SEALED AND
WATERTIGHT. SEE DETAIL 1/010503. MANHOLES TO
INCLUDE VENT PIPE WITH OPENING TWO FEET
ABOVE 100 YEAR FLOOD ELEVATION. SEE DETAIL
2. CONTRACTOR IS RESPONSIBLE FOR ALL BYPASS
PUMPING.
KEY NOTES:
• CONTRACTOR SHALL VERIFY HORIZONTAL AND
VERTICAL LOCATION OF EXISTING SEWER AT
CONNECTION POINT PRIOR TO CONSTRUCTION.
® BYPASS DISCHARGE VAULT, SEE DETAIL ON
SHEET 01C108.
N 681468.02
E 939937.02
® BYPASS SUCTION VAULT, SEE DETAIL ON SHEET
01C107.
N 681549.84
E 939920.04
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
PRELIMINARY
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
K. QUATTLEBAUM, PE
CHECKED BY
M. SHULTZ, PE
DRAWN BY
K. QUATTLEBAUM, PE
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
•
CARRIER BRIDGE
PUMP STATION
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
in
60" INFLUENT GRAVITY SEWER
PLAN & PROFILE
2" FILENAME
SHEET
ISSUE DATE DESCRIPTION
PROJECT NUMBER
10194380
SCALE

1
2
3
4
5
6
7
8
1414=4" E 177.49'
SS
\iv \ \.
N\ x\\ \\ N\ \
N, N., \, N ,.-7---...„.. A'N
�\\ \\
\ \ ,'/kNN__----- ,._____
---\\v,/ /- N ----
____
SS —
SS
SS
Z01V,EJAE
N N
NNN
CONCRETE FLOOR
O\
1.5" OIP —
0.10' AG
SS
II- PROGRESS ENERGY OF N
NNN
N
N
\ x \ x xNN,N,N, \\ 1 I IC !II
Ou
SSMH
RIM: 2,046.67'
IN: 2,041.8'
OUT: 2,041.5'
Oti
ZONE
N
zy
77.7
,777
/77
77/
ASSUMED WATER LINE
ELECTRICKL
BOX
SS
SSMH
RIM: 1,986.97'
OUT: 1,972.3'
SS
RBF-
LID
7/7
--2030
UJ
GENERATOR
STEEL PLATE I
SSMH
RIM: 1,986.95'
UNABLE TO MEASURE
SS -
WET WELL
LA
---_-_-._---------------_____T-----___________-----.----_---- --OUT: 2,018.2'
CARB
SCRUB
MAINT.
LID
)
ss
CONCRETE
CONCRETE
N
SS
Sk
ss
ASSUMED WATER LINE
SS-
48" RCP
ss
ss
SS
SS
ss
ASPHALT PA\E"viENT
ss
ASPHALT PAVEMENT
METROPOLITAN SEWERAGE DISTRICT— __--
9638-91-9330
D.B. 1034, P. 103
ss
ss
11 sc.; S;c1I\\AI
RIM: 2,020.63'
ss ?Jo?
ss
SS
OU
SS
OU
DROP INLET
GR: 2,023.8'
OUT: 2,020.2'
OUT: 2,015.0'
EDGE OF WATER
EDGE OF ASPHALT
FLOOD HAZARD LINE (FLOODWAY)
FLOOD HAZARD LINE (ZONE AE)
PROPERTY LINE (SURVEYED)
PROPERTY LINE (NOT SURVEYED)
ADJOINING PROPERTY LINE
EDGE OF GRAVEL
STORM LINE
X FENCE (CHAIN LINK)
SANITARY SEWER LINE
OVERHEAD UTILITY LINE
TRANSMISSION LINE RIGHT-OF-WAY
TREE LEGEND
BRC
BXE
CHY
GINKGO
HDW
LOC
MAP
PIN
RDB
SYC
WLN
ss
•
SPEED
ss
BIRCH
BOXELDER
CHERRY
GINKGO BILOBA
HARDWOOD
LOCUST
MAPLE
PINE
REDBUD
SYCAMORE
WALNUT
LEGEND
AG
BG
CMP
CPP
DB
DIP
DI
PIN
P.
RCP
RBC
RBF
•
SSMH
VCP
MAINT.
<8>
A
0
ss
SS
/
ss
SS
SSMH
RIM: 1,982.69'
INV: 1,960.0'
ABOVE GROUND
BELOW GROUND
CORRUGATED METAL PIPE
CORRUGATED PLASTIC PIPE
DEED BOOK
DUCTILE IRON PIPE
DROP INLET
FIRE HYDRANT
GUY ANCHOR
PARCEL IDENTIFICATION NUMBER
PAGE
UTILITY POLE
REINFORCED CONCRETE PIPE
REBAR WITH CAP
REBAR FOUND
SANITARY SEWER CLEAN OUT
SANITARY SEWER MANHOLE
VITREOUS CLAY PIPE
LIGHT POLE
MAINTENANCE
MANHOLE
WATER METER
WATER VALVE
CORNER FOUND (AS DESCRIBED)
60d NAIL SET
CALCULATED POINT
IcADJ)41 E A
SURVEY PERFORMED BY:
ASPHALT
SS
ss
ROBERT C. BROWN (L-2748)
ED HOLMES & ASSOCIATES LAND SURVEYORS
300 RIDGEFIELD CT. SUITE 301
ASHEVILLE, NC 28816
STATE PLANE COORDINATES WERE OBTAINED BY
GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS)
SURVEY, AND THE FOLLOWING INFORMATION WAS
USED TO PERFORM THE GNSS SURVEY:
HORIZONTAL POSITIONAL ACCURACY: 0.01 m
VERTICAL POSTIONAL ACCURACY: 0.02 m
HORIZONTAL DATUM= NAD83 (2011)
VERTICAL DATUM= NAVD88
LOCALIZATION POINT: N: 681,066.19', E: 940,721.62'
COMBINED SCALE FACTOR: 0.9997972
UNITS: U.S. SURVEY FEET
DATE OF SEAL: NOVEMBER 27TH, 2019
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
PRELIMINARY
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
C.GIGLIOTTI,J.CAUSEY
CHECKED BY
J. CAUSEY
DRAWN BY
C. GIGLIOTTI
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
ct-
CARRIER BRIDGE
PUMP STATION
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
EXISTING
SITE PLAN
2,, FILENAME
SHEET
ISSUE
DATE
DESCRIPTION
PROJECT NUMBER
10194380
SCALE

WA
IN Mf lV i,.A_
CONCRETE
\�
SSMH
RIM: 2,046.67'
IN:
OUT:
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
PRELIMINARY
ISSUE DATE DESCRIPTION
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
CHECKED BY
DRAWN BY
PROJECT NUMBER
C.GIGLIOTTI,J.CAUSEY
J. CAUSEY
C. GIGLIOTTI
10194380
_ 1
APPROX. LOC.
STEEL PLATE I1
2,023.07'
IN:2,018.9'
----�� - OUT:2,018.2'
DROP INLET
GR: 2,023.8'
OUT: 2,020.2'
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
01\ s
+vIETROPOLITAN SEWERAGE DIS
9638-91-9330
D.B. 1034, P. 103
1. CLEAR AND GRUB APPROXIMATELY 1.24 ACRES.
2. 378 LINEAR FEET OF CHAIN LINK FENCE TO BE REMOVED.
REFER TO KEYNOTE 2.
3. TEMPORARY CONSTRUCTION ACCESS ROADWAY. REFER
TO SHEET 01C401 FOR MORE INFORMATION.
4. SAW CUT ASPHALT FOR CLEAN TIE IN. REFER TO
KEYNOTE 7.
5. EXISTING SEWER FORCE MAIN TO BE ABANDONED.
6. EXISTING GRAVITY SEWER LINE AND MANHOLES TO BE
ABANDONED.
0\`,`0 SEWE/4Q�
� QQ 4,A
•
a�
�eF OP
BOUNTY, t40-
1. SAW CUT FOR CLEAN LINES WHERE NEW WORK MEETS EXISTING FOR PAVEMENT
AND CURB AND GUTTER.
COORDINATE DEMOLITION AND REMOVAL OF UTILITIES WITH METROPOLITAN
SEWERAGE DISTRICT (MSD).
REFER TO ELECTRICAL PLANS FOR ROUTING OF OVERHEAD AND UNDERGROUND
ELECTRICAL AND TELECOMMUNICATION LINES.
ALL AREAS WHERE STRUCTURES AND PIPING ARE REMOVED SHALL BE GRADED IN A
MANNER TO MAINTAIN POSITIVE DRAINAGE. TO AVOID SETTLING IN AREAS OF
SIGNIFICANT FILL, PLACE AND COMPACT SOIL IN 6" LIFTS AND PROVIDE A 6"
ADDITIONAL SOIL PLACEMENT ABOVE NATURAL GRADE.
VERIFY WITH THE OWNER (MSD) WHETHER ANY MATERIAL OR APPURTENANCES ARE
TO BE SALVAGED.
7. UTILITIES SHOWN ARE BASED ON INFORMATION PROVIDED BY OTHERS AND IS NOT
GUARANTEED TO INCLUDE ALL SUCH FEATURES OR EXACT LOCATIONS.
CONTRACTOR TO FIELD VERIFY ALL UTILITIES PRIOR TO CONSTRUCTION. PROTECT
ALL EXISTING FEATURES NOT NOTED FOR REMOVAL.
8. FILL ALL STRUCTURES AND HOLES CREATED FROM DEMOLITION WITH COMPACTED
STRUCTURAL FILL MATERIAL TO A 95% MAXIMUM DRY DENSITY PER ASTM D698.
REFER TO TRENCHING DETAILS.
9. INSTALL PHASE 1 EROSION CONTROL MEASURES PRIOR TO STARTING DEMOLITION
AND/OR MASS CLEARING. SEE SHEETS 01C401.
10. ALL TIMBER ON THE PROJECT SITE NOTED FOR CLEARING AND GRUBBING MUST
BECOME THE PROPERTY OF THE CONTRACTOR, AND MUST BE REMOVED FROM THE
PROJECT SITE.
11. DISPOSE OF DEMOLITION DEBRIS IN ACCORDANCE WITH APPLICABLE FEDERAL,
STATE AND LOCAL REGULATIONS, ORDINANCES, AND STATUTES.
12. EXECUTE ALL WORK WITH CARE TO PROTECT FROM DAMAGE ALL ADJACENT
EXISTING FEATURES THAT ARE TO REMAIN. ANY SUCH DAMAGE SHALL BE REPAIRED
OR REPLACED TO MATCH THE ORIGINAL CONDITION AT NO ADDITIONAL COST TO THE
OWNER (MSD).
13. PROTECT ALL EXISTING TREES OUTSIDE OF CLEARING LIMITS.
14. EXISTING PUMP STATION, PAVING, FENCING, AND ALL APPURTENANCES ASSOCIATED
WITH THE EXISTING PUMP STATION ARE TO REMAIN UNTIL THE PROPOSED PUMP
STATION CONSTRUCTION HAS BEEN COMPLETED AND IS FULLY OPERATIONAL.
TIMING OF THE DEMOLITION OF THE EXISTING PUMP STATION MUST BE
COORDINATED WITH METROPOLITAN SEWERAGE DISTRICT.
0
1"
PUMP STATION SITE
CLEARING AND
DEMOLITION PLAN
2" FILENAME
CARRIER BRIDGE
PUMP STATION
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
SCALE
01C102.dwg
1 "=20'
SHEET
01C102
D
B

1
�14°17'24" F i77 49'
i
i
U
10
0
MEMO
FLOOD HAZAR
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
2
a.
PROPERTY LINE
3
PRELIMINARY
4
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
C.GIGLIOTTI,J.CAUSEY
CHECKED BY
J. CAUSEY
DRAWN BY
C. GIGLIOTTI
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
0
5
6
FRENCH BROAD
RIVER PARK
NEW WORK KEYNOTES: O
1.
CONCRETE PAVING (8/010504).
2. CONCRETE CURB AND GUTTER (DETAIL 3/SHEET 010504).
7
3. SEGMENTAL BLOCK RETAINING WALL (4,5,6/010507). CONTRACTOR SHALL
PROVIDE SEALED SHOP DRAWINGS OF RETAINING WALLS TO BE CONSTRUCTED
ON THE SITE FOR ENGINEER'S APPROVAL.
4. BOLLARD (TYP. OF 11) (2/01 C504).
5. REMOVABLE BOLLARD (TYP. OF 20) (4/01 C504).
6. PROPOSED GENERATOR. REFER TO ELECTRICAL PLANS FOR MORE
INFORMATION.
7. CHAIN LINK SECURITY FENCE (10/010504).
8. AUTOMATIC SLIDING GATE WITH DETECTION LOOPS AND CARD READER, REFER
TO SHEET 010505 FOR MORE INFORMATION.
9. EXISTING ASPHALT DRIVE TO BE MILLED AND RESURFACED. REFER TO SHEET
01C102 FOR MORE INFORMATION REGARDING DEMOLITION AND SUBSEQUENT
PROPOSED PHASING OF PAVING.
10. STORM STRUCTURE (TYP.), REFER TO SHEET 01C201 FOR MORE INFORMATION.
11. FIRE HYDRANT, REFER TO SHEET 01C301 FOR MORE INFORMATION.
12. REFER TO SHEET 01C104 FOR MORE LANDSCAPING INFORMATION
p,N SEWER40(4,
L \
y�e s aWb�`s GPQ
CQNNTY,
CARRIER BRIDGE
PUMP STATION
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
0
1"
8
GENERAL SHEET NOTES:
1. SEE LEGEND ON SHEET 01C001.
2. PROVIDE AND MAINTAIN PHASE 1 EROSION CONTROL MEASURES
PRIOR TO START OF CONSTRUCTION. REFER TO SHEET 01C401
3. ANY PROPERTY LINE MONUMENTATION DISTURBED DURING
CONSTRUCTION SHALL BE SET OR RESET BY A PROFESSIONAL
LICENSED SURVEYOR.
4. COORDINATE THE WORK OF ALL DISCIPLINES. VERIFY FIELD
CONDITIONS, QUANTITIES, AND DIMENSIONS PRIOR TO THE
COMMENCEMENT OF WORK. ANY DISCREPANCIES SHALL BE
PROMPTLY BROUGHT TO THE ATTENTION OF THE OWNER AND
DESIGN TEAM.
5. SEE ARCHITECTURAL DRAWINGS FOR EXACT BUILDING DIMENSIONS
AND DETAILS ASSOCIATED WITH THE BUILDING.
6. ALL DIMENSIONS ARE TO FACE OF THE BUILDING OR EDGE OF
PAVEMENT UNLESS OTHERWISE INDICATED.
7. PROVIDE ALL SIGNS UNLESS OTHERWISE INDICATED. ALL SIGNAGE
TO MEET MUTCD STANDARDS UNLESS OTHERWISE INDICATED.
8. KEEP AND MAINTAIN THE PROJECT AREA IN A CLEAN CONDITION,
FREE OF DEBRIS AND TRASH.
9. CURBING SHALL BE CAST -IN -PLACE ON -SITE.
SITE LAYOUT AND
CONTROLS PLAN
2" FILENAME
00C103.dwg
SHEET
01C103
C
B
A
ISSUE DATE DESCRIPTION
PROJECT NUMBER
10194380
SCALE
1 "=20'

0
TW:1993.32 i
BW: 1984.87
STORM SYSTEM D
SEE SHEET 01C202
FOR PROFILE
0+00
FES A-1
STA 0+00.00
� J
1
I II •
MHA-2 `V
STA 0+74.08
•
N. \ \
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N.
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2016.96_
STORM SYSTE
EE SHEET 01C202
e.R PROFILE ��` _
rj
DI C-2
STA 0+15
STORM SYSTEM C -----
SEE SHEET 01C202
FOR PROFILE
1992.86`
STORM
SEE SHEET
FOR PROFtLr-
DI B-2 -__ STA 0+22.47 _ —
—1992:46!
N \ \\
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5
0
DI C-3
STA 0+88.49
ROPERTY LINE
f�-
-1-9-85 ,
2
DI C-4
STA 1+57.79
/ / 't.
,DI B-6
/ STA 2+23.24
NN
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I 1 /
l I /
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L
FRENCH BROAD
RIVER PARK
0
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GENERAL SHEET NOTES:
1. SEE LEGEND ON SHEET 000001.
2. PROVIDE AND MAINTAIN EROSION CONTROL
MEASURES. SEE EROSION CONTROL SHEETS
3. FOR DROP INLET (DI) STORM STRUCTURE SEE
DETAIL 1/010506
4. FOR CATCH BASIN (CB) STORM STRUCTURE SEE
DETAILS 2,4/010506
5. FOR MANHOLE STORM STRUCTURE SEE DETAIL
6. FOR TRENCHING ASSOCIATED WITH STORM PIPE
SEE DETAIL 1/010501.
7. RCP MUST BE CLASS III UNLESS OTHERWISE
SPECIFIED.
8. ALL GRADE TRANSITIONS MUST BE SMOOTH AND
GRADUAL WITH NO ABRUPT OR SHARP
CHANGES.
9. FINISHED GRADE MUST BE INCH TO 1 INCH
BELOW TOP OF ABUTTING PAVEMENTS,
SIDEWALKS, AND CURBING.
10. SEE SHEET 01C202 FOR STORM SYSTEM
NEW WORK KEYNOTES: (—,)fr
1. CONCRETE GENERATOR PAD, REFER TO
ELECTRICAL DRAWINGS FOR MORE
INFORMATION, TOP OF CONCRETE PAD
ELEVATION = 1993.50.
2. LEVEL SPREADER (6/010504).
3. SEGMENTAL BLOCK RETAINING WALL
(4,5,6/010507). CONTRACTOR SHALL PROVIDE
SEALED SHOP DRAWINGS OF RETAINING WALLS
TO BE CONSTRUCTED ON THE SITE FOR
ENGINEER'S APPROVAL.
4. UNDERGROUND DETENTION SYSTEM
1-)IZ
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
PRELIMINARY
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
CHECKED BY
J. CAUSEY
DRAWN BY
C. GIGLIOTTI
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
CP
CARRIER BRIDGE
PUMP STATION
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
GRADING AND
DRAINAGE PLAN
2'' FILENAME
SHEET
01C201
ISSUE DATE
DESCRIPTION
PROJECT NUMBER
10194380
SCALE

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SSMH
RIM: 2,046.67'
IN: 2,041.8'
OUT: 2,041.5'
\
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▪ � VAS � SLOPE DRAIN0 • -- �\
\ \ `��--- \: PROGRESS ENERGY OF `N \N✓�,
Ill ��-N''' \_ THE CAROLINAS \moo \\ J�,.
„\ - x \ TREE PROTECTION (TYP) TP �'� D.B. 602, P. 345 e �/ /—�
(2/01 C515)
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LOD
//
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WATER VALVE
IN MANHOLE 5'±TO
CONCRETE FLOOR
RIP RAP PROTECTION OUTLET OP
(4/01 C514)
LOD p� LOD
SF
SEDIMENT BAFFLES SB
(3/01 C513)
SEDIMENT BASIN
()XXX(X)
Oft
Oft �--s
Nal gift
S
oo
LOD
TEMPORARY
SOIL STOCKPILE
(4/010513)
S.(
1
3
I I
/ / I
/ I
e�,""ldD WATER LINE
TEMPORARY CONSTRUCTION EASEMENT
LOD— LOD_— LODE LOD
4
11'1
1
\ \ \ \ �\ \
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\ \ \ \ \ \ \\
SEDIMENT TUBE (TYP) \ \
/ ///_ (5/01 C513) \\�
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\ '
ss I iv
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IN: 1,97'
OUT:
GRAVEL
LOD
UNABLE IL,
CARB
SCRUB
5
14 \
/ / \
ASSUMED WATER LIN
SILT FENCE ROCK OUTLET (TYP) ppr-A \
6
J-.L3 LOD
SILT FENCE (TYP) PER DETAIL
C3 SHEET 010510
LOD
ABC STONE ACCESS ROAD
SS
LOD
ss
LOD
00-1
0 CONSTRUCTION ENTRANCE
LOD
I (.°METROPOLITAN SEWERAGE ISISTRICT-
\ 9638-91-9330
.:,.,> -- .--- D.B. 1034, P. 103
;....„. ;,...l.
60 _---P/i2
DROP INLET
GR: 2,023.8'
OUT: 2,020.2'
SSMH
RIM: 2,020.63'
IN: 2,015.4'
GENERAL SHEET NOTES:
1. SEE LEGEND ON SHEET 01C001.
LOD
2. SEE EROSION CONTROL NOTES, CONSTRUCTION SEQUENCE,
AND SEEDING SPECIFICATIONS ON SHEET 010512.
3. SEE SHEET 010512 FOR NCGO1 GROUND STABILIZATION AND
MATERIALS HANDLING, AND NCGO1 SELF INSPECTION SHEET.
4. SEE SHEETS 010512 THROUGH 010515 FOR EROSION CONTROL
NOTES AND DETAILS.
5. NO EARTHWORK/LAND DISTURBANCE SHALL BE PERFORMED
UNTIL ALL PHASE EROSION AND SEDIMENT CONTROL DEVICES
ARE IN PLACE AND HAVE BEEN INSPECTED.
6. EQUIPMENT AND/OR TRUCK TIRE CLEANING STATIONS(S) SHALL
BE ESTABLISHED AS NECESSARY TO ENSURE THAT NO
MUD/SEDIMENT MIGRATES FROM THE CONSTRUCTION SITE TO
THE ADJACENT PUBLIC ROADS.
7. SOD (SAND BASED CENTIPEDE) ALL DISTURBED PERVIOUS AREAS
WITHIN THE LIMITS OF DISTURBANCE ONCE BROUGHT TO
FINISHED GRADE UNLESS OTHERWISE SPECIFIED. SEE
LANDSCAPE PLANS FOR MORE INFORMATION.
8. TOTAL LAND DISTURBANCE = 1.91 ACRES
9. CONTRACTOR MUST ENSURE REQUIRED MAINTENANCE OF
EROSION CONTROL MEASURES.
7
LOD
LoD
SF
SSMH
/ RIM: 1,982.69'
// ic-Cq/.1
SF
PF
LOD LOD—.
LOD
00-1
001
ssl
EROSION AND SEDIMENT CONTROL LEGEND
0
SILT FENCE
SF SF SF —
0
TP TP TREE PROTECTION FENCE
0
TS ›.- TS ›.- DIVERSION SWALE
RIPRAP
0
) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
)0000°0°0°0°0°0°000°000000,000,0000
)000,0,0,00000,0,000000000000000000
00000000000000000
CONSTRUCTION ENTRANCE
0
1 1
i
SILT FENCE ROCK OUTLET
0
1 SEDIMENT TUBE
INLET PROTECTION
0
-.,ii
'1,4.7
ir INLET SEDIMENT FILTER
YARD INLET SEDIMENT FILTER
LOD LIMITS OF DISTURBANCE
—LOD
0
N...,:t_vi.- RIPRAP OUTLET PROTECTION
Velii,
0
SEDIMENT BAFFLE
0
SLOPE DRAIN
0
E
EROSION CONTROL MATTING
HDR Engineering Inc.
of the Carolinas
440 S. Church Street, Suite 1000
Charlotte, NC 28202
704.338.6700
N.C.B.E.L.S. License Number: F-0116
PRELIMINARY
ISSUE
DATE DESCRIPTION
PROJECT MANAGER MATTHEW A. SHULTZ
DESIGNED BY
C.GIGLIOTTI,J.CAUSEY
CHECKED BY
J. CAUSEY
DRAWN BY
C. GIGLIOTTI
PROJECT NUMBER
10194380
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
CARRIER BRIDGE
PUMP STATION
METROPOLITAN SEWERAGE DISTRICT OF
BUNCOMBE COUNTY
in
EROSION CONTROL
PLAN PHASE 1
2" FILENAME
SCALE
SHEET
A