HomeMy WebLinkAbout20130687 Ver 1_More Info Received_20130708EQUIN6X
ENVIRONMENTAL
CONSULTATION A OSNON
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7.03.13
North Carolina Dept. of Environment and Natural Resources
Division of Water Quality - Water Quality Section
To whom it may concern:
We recently submitted a 404/401 application for the Craven Street Improvements -New Belgium Brewery
project and did not include a check with the application. This check is for the application. Enclosed as a
reference only is the PCN for which we included 5 copies in the set we mailed out on 7.02.13 which you
have either just recently received or will be receiving soon. Please call me so we know that the check
and application have been received.
Thank you,
�i
David Tuch
(828) 253 -6856 ext 202
[;53 �120W12 Do
JUL C G 2013
n R - W<,M QUALITY
Equinox Environmental Consultation and Design. Inc.
37 Haywood Street, Suite 100, Asheville NC 28801
828.253.6856
www.equinoxenvironmental.com
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Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Pre - Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1 a. Type(s) of approval sought from the
Corps:
®Section 404 Permit ❑Section 10 Permit
1b. Specify Nationwide Permit (NWP) number: 27 & 39 or General Permit (GP) number:
1c. Has the NWP or GP number been verified by the Corps?
® Yes
❑ No
1d. Type(s) of approval sought from the DWQ (check all that apply):
® 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
le. Is this notification solely for the record
because written approval is not required?
For the record only for DWQ 401
Certification:
® Yes ❑ No
For the record only for Corps Permit:
❑ Yes ® No
1f. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation
of impacts? If so, attach the acceptance letter from mitigation bank or in -lieu
fee program.
❑ Yes
® No
1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below.
❑ Yes
® No
1h. Is the project located within a NC DCM Area of Environmental Concern (AEC)?
[]Yes
® No
2. Project Information
2a. Name of project:
Craven Street Improvements - New Belgium Brewery
2b. County:
Buncombe
2c. Nearest municipality / town:
Asheville
2d. Subdivision name:
2e. NCDOT only, T.I.P. or state
project no:
3. Owner Information
3a. Name(s) on Recorded Deed:
Kimberly Beth Jordan and Christine Nicole Perich
3b. Deed Book and Page No.
New Belgium Site — 5008/1972
3c. Responsible Party (for LLC if
applicable):
New Belgium Brewing Company Inc. & City of Asheville
3d. Street address:
500 Linden Street
3e. City, state, zip:
Fort Collins, CO 80524
3f. Telephone no.:
JIM
3g. Fax no.:
3h. Email address.
KJordan @newbelgium.com I I JUL
�3
d waW ganch
Page 1 of 12
PCN Form — Version 1.3 December 10, 2008 Version
4. Applicant Information (if different from owner)
4a. Applicant is:
® Agent ❑ Other, specify:
4b. Name:
McCray Coates
4c. Business name
(if applicable):
City of Asheville
4d. Street address:
Public Works Building, 161 S. Charlotte Street
4e. City, state, zip:
Asheville, NC 28801
4f. Telephone no.:
828- 259 -5935
4g. Fax no.:
4h. Email address:
mcoates @ashevillenc.gov
5. Agent/Consultant Information (if applicable)
5a. Name:
David Tuch
5b. Business name
(if applicable):
Equinox Environmental Consultation and Design, Inc.
5c. Street address.
37 Haywood Street
5d. City, state, zip:
Asheville, NC 28801
5e. Telephone no.:
828 - 2536856
5f. Fax no.:
5g. Email address:
david @equinoxenvironmental.com
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Page 2 of 12
B. Project Information and Prior Project History
1. Property Identification
1a. Property identification no. (tax PIN or parcel ID):
9638 -87 -3707
1 b. Site coordinates (in decimal degrees):
Latitude: 35.587810 Longitude: - 82.572626
(DD DDDDDD) (- DD.DDDDDD)
1c. Property size:
18.99 acres
2. Surface Waters
2a. Name of nearest body of water (stream, river, etc.) to
French Broad River
proposed project:
2b. Water Quality Classification of nearest receiving water:
B- Primary Recreation, Freshwater
2c. River basin: map is available at
French Broad River
hftp://h2o.enr.state.nc.us/admin/maps/
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
The proposed site is located within Asheville City Limits adjacent to the French Broad River. Topographically, most of the
site consists of a large flat, impervious area recently cleared of warehouse structures. The eastern boundary of the
parcel slopes down to the French Broad River, where the riparian corridor is forested. One perennial stream bisects the
center and one perennial stream intersects the southeastern comer of the property. The National Land Cover Dataset
(2006) classifies the site as a mixture of low to high intensity development, deciduous forest, and developed open space.
3b. List the total estimated acreage of all existing wetlands on the property:
0.25 acres
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
789 ft.
3d. Explain the purpose of the proposed project:
See Supplemental Information
3e. Describe the overall project in detail, including the type of equipment to be used:
See Supplemental Information
Page 3 of 12
PCN Form — Version 1.3 December 10, 2008 Version
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
project (including all prior phases) in the past?
Comments: A jurisdictional Stream Determination has been
® Yes ❑ No ❑ Unknown
performed as well as a wetland delineation by Equinox
Environmental Consultation & Design, Inc. which has been
reviewed by the local US Army Corps of Engineers - Tasha
McCormick
4b. If the Corps made the jurisdictional determination, what type
®preliminary ❑Final
of determination was made?
4c. If yes, who delineated the jurisdictional areas?
Agency /Consultant Company: Equinox Environmental
Name (if known): Hunter Terrell
Consulation and Design, Inc.
Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
Met with Tasha McCormick of the Corps and Tim Fox of NCDENR for a site review of the wetland delineation (May 2013)
and a jurisdictional determination of the stream (Fall 2012).
5. Project History
5a. Have permits or certifications been requested or obtained for
❑ Yes ❑ No ® Unknown
this project (including all prior phases) in the past?
5b. If yes, explain in detail according to "help file" instructions.
6. Future Project Plans
6a. Is this a phased project?
® Yes ❑ No
6b. If yes, explain.
This is a joint venture project between the City of Asheville and New Belgium Brewing. As a first phase the City of
Asheville will start construction on improvements to Craven Street, the greenway along the French Broad River, and the
stream restoration. The stream restoration will be constructed in two phases. The first phase will include the arch culvert
and the stream channel. The upland areas will be temporarily seeded until New Belgium is nearing completion with the
construction of the site including parking areas, buildings and stormwater BMPs. At this time the upland areas will be
planted with native bottomland hardwood forest species.
The New Belgium site development will include two pedestrian bridges that completely span the stream and will have
footings placed outside of the stream channel and top of bank.
Page 4 of 12
C. Proposed Impacts Inventory
1. Impacts Summary
la. Which sections were completed below for your project (check all that apply):
® Wetlands ® Streams - tributaries ❑ Buffers
❑ Open Waters ❑ Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a.
2b.
2c.
2d.
2e.
2f.
Wetland impact
Type of jurisdiction
number —
Type of impact
Type of wetland
Forested
(Corps - 404, 10
Area of impact
Permanent (P) or
(if known)
DWQ — non -404, other)
(acres)
Temporary T
W1 ®P ❑ T
Fill
Bottomland
® Yes
® Corps
0.06
Hardwood Forest
❑ No
E] DWQ
W2 ®P ❑ T
Excavation
Non -Tidal
❑ Yes
® Corps
0.03
Freshwater Marsh
® No
❑ DWQ
W3 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W4 []PC] T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W5 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W6 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
2g. Total wetland Impacts
0.09
2h. Comments: Wetland impacts will occur in both wetlands on site (see Stream and Wetland Delineation map). Wetland
impacts include fill for a 10' wide greenway trail (Wetland 1) and excavation for a grade control structure (Wetland 2) as part of
the stream restoration.
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a.
3b.
3c.
3d.
3e.
3f.
3g.
Stream impact
Type of impact
Stream name
Perennial
Type of jurisdiction
Average
Impact
number -
(PER) ) or
(Corps - 404, 10
stream
length
Permanent (P) or
intermittent
DWQ — non -404,
width
(linear
Temporary (T)
(INT)?
other)
(feet)
feet)
Unnamed
S1 ®P ❑ T
Replace Culvert
Tributary to
® PER
® Corps
9.4
67.5
with Arch Culvert
French Broad
❑ INT
® DWQ
River
Unnamed
S2 ®P [IT
Arch Culvert
Tributary to
French Broad
® PER
❑ INT
® Corps
❑ DWQ
9.4
278
River
Unnamed
S3 ®P ❑ T
Restoration
Tributary to
French Broad
® PER
❑ INT
® Corps
❑ DWQ
9.4
369
River
S4 ❑ P ❑ T
❑ PER
❑ Corps
[]INT
❑ DWQ
S5 ❑ P [IT
❑ PER
❑ Corps
[]INT
❑ DWQ
Page 5 of 12
S6 ❑ P ❑ T
❑ PER
1
❑ Corps
❑ INT
❑ DWQ
3h. Total stream and tributary impacts
714.5
3i. Comments. Stream impacts will be limited to Stream 1 (see Stream and Wetland Delineation map). Impacts to this stream
include a section where the existing round culvert will be replaced with an arch culvert, a section where an arch culvert will be
constructed over the stream, and a section where the stream channel will be restored.
4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then indivi ually list all open water impacts below.
4a.
4b.
4c.
4d.
4e.
Open water
Name of waterbody
impact number —
(if applicable)
Type of impact
Waterbody type
Area of impact (acres)
Permanent (P) or
Temporary T
01 ❑P
02 ❑P
03 ❑P
04 ❑P
0. Total open water impacts
4g. Comments:
5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.
5a.
5b.
5c.
5d.
5e.
Wetland Impacts (acres)
Stream Impacts (feet)
Upland
Pond ID
Proposed use or purpose
(acres)
number
of pond
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1
P2
5f. Total
5g. Comments:
5h. Is a dam high hazard permit required?
❑ Yes ❑ No If yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
Page 6 of 12
6. Buffer Impacts (for DWO)
If project will impact a protected riparian buffer, then
complete the chart below.
If yes, then individually list all buffer impacts
below. If any impacts require mitigation, then
you MUST fill out Section D
of this form.
6a.
❑ Neuse
❑ Tar - Pamlico ❑ Other:
Project is in which protected basin?
❑ Catawba
❑ Randleman
6b.
6c.
6d.
6e.
6f.
6g.
Buffer impact
number —
Reason
Buffer
Zone 1 impact
Zone 2 impact
Permanent (P) or
for
Stream name
mitigation
(square feet)
(square feet)
Temporary T
impact
required?
B1 ❑P ❑T
El Yes
❑ No
B2 ❑P ❑T
❑Yes
❑ No
B3 ❑P ❑T
El Yes
❑ No
6h. Total buffer Impacts
6i. Comments:
Page 7 of 12
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
See Supplemental
b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
See Supplemental
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 yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
2c. If yes, which mitigation option will be used for this
project?
❑ Mitigation bank
❑ ro Payment to in -lieu fee ram
y p g
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank.
3b. Credits Purchased (attach receipt and letter)
Type
Quantity
3c. Comments:
4. Complete if Making a Payment to In -lieu Fee Program
4a. Approval letter from in -lieu fee program is attached.
❑ Yes
4b. Stream mitigation requested:
linear feet
4c. If using stream mitigation, stream temperature:
❑ warm ❑ cool ❑cold
4d. Buffer mitigation requested (DWQ only):
square feet
4e. Riparian wetland mitigation requested:
acres
4f. Non - riparian wetland mitigation requested:
acres
4g. Coastal (tidal) wetland mitigation requested:
acres
4h. Comments:
Page 8 of 12
PCN Form — Version 1.3 December 10, 2008 Version
5. Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation? If yes, you will have to fill out this entire form — please
contact the State for more information.
[:] Yes ® No
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
Zone
6c.
Reason for impact
6d.
Total impact
(square feet)
Multiplier
6e.
Required mitigation
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1.5
6f. Total buffer mitigation required:
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund).
6h. Comments:
Page 9 of 12
E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1a. Does the project include or is it adjacent to protected riparian buffers identified
❑ Yes ® No
within one of the NC Riparian Buffer Protection Rules?
1b. If yes, then is a diffuse flow plan included? If no, explain why.
❑ Yes E] No
Comments:
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project?
-6%
2b. Does this project require a Stormwater Management Plan?
❑ Yes ® No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why: The site is reducing overall impervious
cover by 6 %.
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
® Certified Local Government
2e. Who will be responsible for the review of the Stormwater Management Plan?
❑ DWQ Stormwater Program
❑ DWQ 401 Unit
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project?
City of Asheville
❑ Phase II
3b. Which of the following locally- implemented stormwater management programs
❑ NSW
❑ USMP
apply (check all that apply):
❑ Water Supply Watershed
❑ Other:
3c. Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ® No
attached?
4. DWQ Stormwater Program Review
❑ Coastal counties
❑ HQW
4a. Which of the following state - implemented stormwater management programs apply
❑ ORW
(check all that apply):
❑ Session Law 2006 -246
❑ Other:
4b. Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ® No
attached?
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements?
® Yes ❑ No
5b. Have all of the 401 Unit submittal requirements been met?
® Yes ❑ No
Page 10 of 12
PCN Form — Version 1.3 December 10, 2008 Version
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1a. Does the project involve an expenditure of public (federal /state /local) funds or the
® Yes ❑ No
use of public (federal /state) land?
1 b. If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State
❑ Yes ® No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1c. 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.
2. Violations (DWQ Requirement)
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards,
❑ Yes ® No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b. Is this an after - the -fact permit application?
❑ Yes ® No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in
❑Yes No
additional development, which could impact nearby downstream water quality?
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
4. Sewage Disposal (DWQ Requirement)
4a. Clearly detail the ultimate treatment methods and disposition (non - discharge or discharge) of wastewater generated from
the proposed project, or available capacity of the subject facility.
Page 11 of 12
PCN Form — Version 1.3 December 10, 2008 Version
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
® Yes ❑ No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act
❑ Yes ® No
impacts?
❑ Raleigh
5c. If yes, indicate the USFWS Field Office you have contacted.
® Asheville
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
Most recent N.C. Natural Heritage Element Occurrence Database; USFWS Critical Habitat Web Portal
(htta: / /criticalhabitat.fws. gov /crithab /)
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat?
❑ Yes ® No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
NOAA- National Marine Fisheries Service Essential Fish Habitat Mapper V 3.0
(hq://www.habitat.noaa.gov/protection/efh/habitatmqpggr.html)
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation
❑ Yes ® No
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
State Historic Preservation Office -HPO Web (http: / /gis.ncdcr.pov /hpoweb /);
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: A No -Rise Certification Report has been prepared with
supporting hydraulic analysis, in accordance with NC Emergency Management National Flood Insurance
Program guidelines, and has been submitted to NCDPS officials for review.
8c. What source(s) did you use to make the floodplain determination? NCDPS Floodplain Mapping Program data, and
FEMA Flood Map Panels were used in assembling floodplain data for design determination.
David Tuch
7.02.13
Applicant/Agent's Printed Name
Applicant/Agent's Signature
Date
(Agent's signature is valid only if an authorization letter from the applicant
is provided.)
Page 12 of 12
SUPPLEMENTAL
Section 8
3d. Project Purpose (Describe the reason or purpose of the project).
The purpose of the project improvements for the New Belgium Brewing: East Coast Brewery is
based on a partnership with the City of Asheville and New Belgium Brewing. As part of this
partnership the City of Asheville has agreed to make improvements to the site as part of an
incentive package to help attract New Belgium Brewing to Asheville. In return New Belgium is
developing the site which includes a beer production facility and tasting room. This project is
estimated to create 154 local jobs to operate the facility. The construction of the facility is
estimated to support 1,252 jobs over a seven year period, pumping an estimated $41 million
into the community, as estimated by the Asheville Chamber of Commerce. The project is seen
as a major economic development catalyst for the River Arts District and will have significant
benefits to the overall community and the revitalization of the riverfront as part of the Wilma
Dykeman RiverWay.
Both the City of Asheville and New Belgium Brewing have a goal of developing the site in a
sustainable manner. As such, the improvements to the site that the City of Asheville is
providing include stormwater improvements and a greenway. The stormwater improvements
are part of a larger project and are being considered by the City of Asheville as a regional
stormwater project. There are three major aspects of this regional stormwater project:
1. Watershed Improvements- The City of Asheville is looking to improve water quality and
address sedimentation issues upstream of the New Belgium property prior to water
entering the New Belgium site & the French Broad River.
2. Craven Street Improvements- The City of Asheville is looking to address water quality along
Craven Street (porous pavers or porous concrete and bio- retention), the stream within the
New Belgium property, and a parking area which will include stormwater BMPs (Low Impact
Parking Lot)
3. New Belgium Site- New Belgium Brewing is looking to implement water quality within their
site including stormwater BMPs such as constructed wetlands, bio- retention areas, bio-
swales, and rainwater collection.
The purpose of the stream restoration is to improve the conditions of the unnamed tributary
that flows through the site before emptying into the French Broad River. The stream has been
manipulated overtime and is currently exhibiting low ecological value as an aquatic system. In
fact, water flow is subsurface and one of the goals is to re- establish base flow where it currently
does not occur. To improve the stream and not impact the existing wetland above Craven
Street, a grade control structure will be constructed to maintain the original elevation of
Wetland 2 (See Wetland and Stream Delineation Map) improving water quality downstream of
the structure. To accommodate the programming needs of the site for New Belgium Brewing,
an arch culvert to help meet the parking requirements for the site is also planned to be
constructed. As well, an arch culvert is proposed for Craven Street in which an existing culvert
is located. The City of Asheville will construct the arch culvert under Craven Street and New
Belgium Brewing will construct the arch culvert within the site.
As part of this project a greenway will also be constructed by the City of Asheville to provide a
key connection to the larger greenway system in Asheville for alternative transportation,
recreation, and health benefits to the community. This greenway section will provide a critical
link to the progress energy corridor to the south linking to the French Broad River Park and will
be part of a loop that will connect to the east side of the river and the Wilma Dykeman
RiverWay. It will also include a connection to the West Asheville community.
The approximate dates for construction are September 2013 - September 2014 for the
improvements identified above. The greenway will rely on coordination with the Metropolitan
Sewerage District (MSD) and the stream restoration is proposed to be built in phases. Phase
one of the stream restoration will include the arch culvert and the stream channel including all
of the in- stream structures. The areas beyond the stream channel will be temporarily seeded
and used for temporary diversion ditches. When the work within the site is nearing completion
the grading and final planting for the areas between the stream channel and the New Belgium
site will be graded and planted with native vegetation. The site work is scheduled to be
completed by December 2014.
3e. Describe the overall project in detail, including the type of equipment to be used
The greenway is a 10' asphalt paved trail that will be located on an existing bench within the
existing MSD sewer easement. There will be a trailhead located at the terminus of the trail at
the north end of the site across from Craven Street. There are two unnamed tributaries which
the greenway will cross. Stream 2, closest to Haywood Road, will be spanned with an arch
culvert. Stream 1, that bisects the New Belgium site, will be crossed with a bridge and
abutments outside of the top of bank will be used to support the bridge. The span of the arch
culvert and the footings are more than 2 % times bank full width which on average is 9.4 feet
and above the ordinary high water mark. The greenway plans provided indicate grading and
structures to be constructed including crossings and retaining walls. The overall length of the
greenway is 2,316 linear feet.
The stream restoration includes 369 linear feet. In addition, an arch culvert will be used to span
the stream for 278 linear feet, approximately 67.5 linear feet of which will be replacement of
the existing culvert with a bottomless arch culvert. A grade control structure will be
constructed before the stream flows under Craven Street into the arch culvert. This grade
control structure will limit the impacts to the existing wetland while also allowing the necessary
gradient for the stream as it flows under Craven Street. At Craven Street the existing culvert
which is essentially silted in will be replaced with an arch culvert. The arch culvert will include
footers and the stream channel will include a linear to keep the base flow from going
subsurface. Appropriately sized rock, as well as concrete baffles to deter movement will also be
placed within the channel through the section of the arch culvert. Once the stream flows
through the arch culvert it will enter a restored section of stream. The stream will be designed
as a threshold channel with Type B morphology and an immobile bed constructed of natural
river cobble. The design includes in- stream structures to create a riffle pool system and grade
control structures using natural stone boulders. A low rock wall will be constructed at the back
of the floodplain bench. Above the bench the slope will be graded and when needed, retaining
walls will be used to step up the slope with terraces to meet the grade of the New Belgium site.
Native plants will be used to revegetate the banks and provide habitat and shade along the
stream.
For construction of the greenway a motor grader, mini track hoe, and bobcat will be the
primary equipment used to construct the trail. The limits of disturbance will be flagged to avoid
unnecessary impacts to the wetland. The stream will be constructed from the top down with
the arch culvert installed first and progressing downstream. A track hoe will be used for the
stream channel construction activities.
Section D
la. Specifically describe measures taken to avoid or minimize the proposed impacts in
designing the project.
The City of Asheville and New Belgium Brewing are focused on creating a model for sustainable
commercial development and have taken steps to minimize and avoid impacts to jurisdictional
waters. In fact, the stormwater BMPs that will be used by the City of Asheville and New
Belgium Brewing show their commitment to being sensitive to the environment since many of
the stormwater BMPS are not required as there not an increase in impervious cover as a result
of the project.
The project has been designed to avoid impacts to wetlands and streams whenever possible.
The wetlands on the property are located along the floodway near Haywood Road and
immediately above the site on the southwest side of Craven Street. The wetland along the
floodway is located where the greenway passes. Impacts could not be avoided as the trail
surface needs to be designed to accommodate a 60,000 lbs. pound Metropolitan Sewerage
District (MSD) vehicle to access the line and manholes. To attempt to avoid this wetland impact
and meet the design criteria for the trail would require excessive cost to build a trail that has
the structural integrity to accommodate such a weight. In addition, the agreement that MSD
and the City of Asheville have for allowing greenways within their MSD sewer easement states
that "no structures, including footings, are allowed in MSD easement areas ". A boardwalk
system to span a wetland is considered a structure by MSD.
Wetland 2, located near the southwest boundary of the parcel along Craven Street, has been
created due to sediment that has accumulated in the culvert passing under Craven Street. This
blockage in essence is serving as a dam that backs water up above the road and has created the
conditions for the wetland. Impacts to the wetland in this location are minimized by utilizing a
grade control structure. If a grade control structure was not used the wetland area would need
to be re- graded to connect to the stream that passes under Craven Street. If such grading were
to occur it would change the hydrology and drain the wetland. The grade control structure
prevents draining the wetland and allows the stream restoration on the New Belgium property
to create the longitudinal grade necessary for the stream restoration.
Avoidance and minimization of impacts to the unnamed tributary that flows under Craven
Street through and existing culvert is a significant part of this project. A portion of this stream
will be restored while another section will be spanned with a bottomless arch culvert. At the
onset of the design it was thought that the entire stream would be piped. However, the design
team representing both New Belgium Brewing and the City of Asheville was able to meet the
design needs and program elements of the site (providing the necessary parking requirements)
while also enhancing the degraded stream through restoration. As the unnamed tributary
enters the site the existing culvert will be replaced with a bottomless arch culvert. The arch
culvert will then be extended to span the stream and provide employee parking above the
stream. Beyond this section the stream will be restored.
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through
construction techniques.
During the construction of the greenway the limits of disturbance will be flagged by the
surveyor and sediment fencing will be used to minimize impacts. The stream will include
temporary diversion of stormwater off the banks of the stream during construction. As well
sediment fencing will be used to minimize sediment from reaching the stream channel.