20231276 Ver 1_More Info Received_20231109

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Moore, Andrew W
From: Emily Tarsa <[e-mail]>
Sent: Thursday, November 9, 2023 2:29 PM
To: Anderson, Mitchell L CIV USARMY CESAW (USA); Moore, Andrew W
Subject: [External] SAW-2023-01864, 7 Mountain, Buncombe Co: Response to Comments
Attachments: 1947_Topo_Overlay.pdf; NC_Barnardsville_163684_1946_24000.jpg; NC_Barnardsville_163686_1947_
24000 jpg; NC_ Barnardsville_163682_1935_24000 jpg; 2023-11-08 12172 STREAM WL IMPACT
FIGURES.pdf; updated_PCN_table_11.8.23.pdf, updated_delineation_post_PJD_l1.8.23.pdf
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
button located on your Outlook menu bar on the Home tab.
Mitchell and Andrew,
Please see the responses below and the corresponding attachments regarding the 7 Mountain Estate PCN and PJD.
• USACE: Plans received with the subject PCN indicated historic stream impacts associated with forestry. As the
proposed use of the historic fill is not an exempt activity, these impacts may require permitting. Please provide
information such as date of installation as well associate impact tables.
We have conversed with the landowner and engineer, who clarified historic impacts. Here is a copy of their
response:
"As far as the existing impacts, we have very little information. However, I [Greg Hoffman, CDC] was told by Kevin
Tipton, Buncombe County Fire Marshal, that the existing main road was installed in the 90's to fight a forest fire. He
said that he was a fire fighter at the time and helped to fight that fire." The engineer has also had a conversation
with a prior landowner who stated that this road has been on the site for "nearly 100 years."
We have examined historical aerial imagery from Google Earth, NC DOT imagery, and USGS Topo Map Viewer. There
is no evidence of logging at this site. Further, this road is visible in topographic maps dating back to 1935. Additional
extensions of the road are visible in topographic maps from 1946 and 1947. The mapped road on topographic maps
aligns closely with today's existing road. I've included several attachments documenting the 1947 USGS topo map
overlayed on the project site ("1947_Topo_Overlay.pdf") along with a marked up copy of the original USGS topo
maps from 1935, 1946, and 1947.
Given this data, we do not believe that these historic impacts require permitting. We are happy to discuss this point
further.
USACE: Plans received with the subject PCN indicate phased work labeled as "Phase 2 Future Project". Will impacts to
Waters of the United States associate with fill be conducted to complete future phases? If so, please provide details
regarding these impacts and an impact table.
As stated in the "PCN Form Additional Information" section (pg. 17, Section B.6b), the timing and impacts associated
with Phase 2 is currently unknown. Impacts associated with Phase 2 development will be permitted appropriately
and those permits will reference the action identification number of the present Phase 1 permit. If/when phase 2
occurs it will be based on design options and market conditions and could be anywhere from 3-10 years in the
future. The applicant understands that future stream impacts, if any, will be considered cumulative and could
require mitigation for past and future impacts.
• USACE: Plans received with the subject PCN indicate fill associated with temporary dewatering. Please indicate the
amount and area of temporary fill to be placed and removed associated with proposed pump around impacts.

According to the engineer, dewatering will involve the installation of a temporary berm 5-10 feet upstream and
downstream of the work area to enable work -in -the dry. A typical detail of the pump around/dewatering detail was
included in the original site plan. An updated site plan (attached) indicates these temporary impacts in the
appropriate impact bulletin (Figure 2). Also attached is an updated table and replacement page 4 from the PCN that
reflects these new temporary impacts.
• USACE: The subject request was accompanied with a Preliminary Jurisdictional Determination Request form. This
office did not receive a map identifying the location of data points for each Wetland Determination Data Form or
tributary assessment reach. Please provide a copy of this map. This office would like to perform afield visit to
observe the aquatic resources and existing impacts. Upcoming available dates are October 11th October 18`"
November 15; and November 3'd . Please notify this office if one of these dates work with your schedule.
An updated delineation map with data point locations has been attached to this email. The PJD visit has since been
completed on November 1, 2023. Since the PJD visit, the delineation map has also been updated to include the
background an extension of wetland "WD" and the addition of missing culverts. Mitchell — one point of clarification
here: the newer plastic culvert we saw is the "TEMP -AT" culvert that was previously listed in the site plan and in the
delineation map (stream SA, circled in the image below). The stream above and below that culvert was also listed
here within the project boundary.
4
. E4*
41
'pP-PL-1
• USACE: Northern Long Eared Bat as well as Tri Colored Bat are currently listed as species with potential summer
habitat within your project area. Please answer the questions below regarding tree clearing to facility consultation
with USFWS:
1. Enter the extent of the action area (in acres) from which trees will be removed - round up to the nearest tenth of
an acre. For this question, include the entire area where tree removal will take place, even if some live or dead
trees will be left standing.
As stated in the "PCN Form Additional Information" section (pg. 17, Section 13.3e), approximately 16 acres of tree
clearing will occur during this project. The tree clearing will occur within the constructed driveways and along
portions of the former fire road to allow for appropriate road grading and stabilization.
2. In what extent of the area (in acres) will trees be cut, knocked down, or trimmed during the inactive (hibernation)
season for northern long-eared bat? Note: Inactive Season dates for spring staging/fall swarming areas can be
found here: https://www.fws.gov/media/inactive-season-dates-swarming-and-staging-areas
Tree clearing will be conducted during the inactive season to comply with the tree clearing moratorium.

3. In what extent of the area (in acres) will trees be cut, knocked down, or trimmed during the active (non -
hibernation) season for northern long-eared bat? Note: Inactive Season dates for spring staging/fall swarming
areas can be found here: https.11www.fws.govlmedia/inactive-season-dates-swarming-and-staging-areas
Tree clearing will be conducted during the inactive season to comply with the tree clearing moratorium.
4. Will all potential northern long-eared bat (NLEB) roost trees (trees >3 inches diameter at breast height, dbh) be
cut, knocked, or brought down from any portion of the action area greater than or equal to 0.1 acre? If all NLEB
roost trees will be removed from multiple areas, select 'Yes' if the cumulative extent of those areas meets or
exceeds 0.1 acre. Yes or No.
No, only a small portion of the surrounding forested area will involve tree clearing and the remaining NLEB roost
trees will be preserved.
5. Enter the extent of the action area (in acres) from which all potential NLEB roost trees will be removed. If all
NLEB roost trees will be removed from multiple areas, entire the total extent of those areas. Round up to the
nearest tenth of an acre.
As stated in the "PCN Form Additional Information" section (pg. 17, Section B.3e), approximately 16 acres of tree
clearing will occur during this project. The tree clearing will occur within the constructed driveways and along
portions of the former fire road to allow for appropriate road grading and stabilization.
6. For the area from which all potential northern long-eared bat (NLEB) roost trees will be removed, on how many
acres (round to the nearest tenth of an acre) will trees be allowed to regrow? Enter '0' if the entire area from
which all potential NLEB roost trees are removed will be developed or otherwise converted to non forest for the
foreseeable future.
0
7. Will any snags (standing dead trees) >3 inches dbh be left standing in the area(s) in which all northern long-eared
bat roost trees will be cut, knocked down, or otherwise brought down? Yes or No.
No, the tree clearing area is approximately 16 acres along the former fire road and constructed driveways. These
areas will be converted to non -forest habitat. However, forested areas surrounding the project site will not be
impacted.
NCDEQ: The stream and wetland delineation map included with the preliminary jurisdictional request does not depict
a pre-existing culvert in stream SE. However, impact S1 is a 30 foot culvert replacement for a reported pre-existing
20 foot culvert. Am 1 correct to assume the 20 foot pre-existing culvert is not presently within a jurisdictional stream,
but the additional 10 feet for the replacement will extend into a jurisdictional stream?
Thanks for catching this! In reviewing our original GPS locations, this culvert was missed in our delineation map. We
have since been out to the site, taken points on the culvert, and added it to the delineation map.
• NCDEQ: Where is the 31 feet of temporary impact associated with impact S4? Is it the 31 feet immediately below the
outlet of the proposed culvert at S1 ?
This has been clarified on the attached site plans. According to the engineer, this will occur downstream of the
current culvert to replace with a longer culvert and to appropriately regrade and restabilize the banks.
NCDEQ: Please provide additional information detailing why temporary culvert TEMP -AT (Impact S2) is needed.
An existing 21 LF culvert (EX -AT) was at this location historically, and this was replaced with an emergency after -the -
fact 35 LF temporary culvert (TEMP -AT) to prevent failure of the road (14 LF of temporary impact). The TEMP -AT
culvert (which is the newer culvert we saw at the site, Mitchell) is perched and will be replaced with a more
appropriately sized 25 LF culvert (4 LF permanent impact from the original 21 LF culvert). Slopes will then be
regraded and stabilized after the new, permanent 25 LF culvert is installed.

• NCDEQ: In areas where the stream banks will be re-established, what measures will be used for erosion control and
ground stabilization while the live stakes become established?
According to the engineer: "We'll be stabilizing all of the slopes within 30 feet of the streams with jute erosion
control matting and seeding to establish permanent groundcover."
If you have any additional questions, please don't hesitate to contact me.
Thanks,
Emily
Emily Tarsa, Ph. D.
Wetland Biologist
CLear\Nater
An EnviroScience Company 0
145 7th Ave West, Suite B
Hendersonville, NC 28792 1 EnviroSciencelnc.com
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SEVEN MOUNTAINS
STREAM & WETLAND IMPACT BULLETIN -FIGURE 1
NOVEMBER 2023
NCBELS #: C-2184

NOM
0 30
EXISTING 2' CONTOURS (TYP)
INSET "A"
EXISTING WETLAND
PROPOSED
2' CONTOURS (TYP)
PROPOSED PERMANENT
WETLAND IMPACT "W1"
EXISTING 20 LF CULVERT TO BE REPLACED WITH 30
LF CULVERT "R1-RO"
102 SF, 0.002 AC
/ /
W
3220
PROPOSED PERMANENT STREAM IMPACT "S1" 10 LF,
0.002 AC
PROPOSED TEMPORARY STREAM IMPACT IN AREA OF
\ °
3200
DISTURBANCE; "S4" 31 LF, 0.002 AC (31 LF
/
o
DOWNSTREAM FOR DEWATERING)
3190
_ n
�Z��
31g 0
`
RE-ESTABLISH STREAM BANK WITH 3:1 MAX. SIDE
<
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oo �
SLOPES & LIVE -STAKING (SEE DETAIL ON FIGURE 3)
T
R1-RO
- PD
p <�—
�1�a
PROPOSED
RETAINING
(TYP)
\ WALL TYP �o iI.E.: 3177.1'
III
o Q
L �
\ 3160 O
o/' m
�n
o Ln
0 0
STORM R PROFILE
EXISTING STREAM CENTERLINE
EXISTING STREAM TOP OF BANK
EXISTING 30' STREAM BUFFER
INSET "B"
PROPOSED 2' CONTOURS (TYP)
Ix PROPOSED TEMPORARY STREAM IMPACT
IN AREA OF DISTURBANCE; "S5" 20 LF,
0,002 AC(1 UPSTREAM; 10 LF
DOWN
DOWNSTRTR FOR FOR DEWATERING)
1
�\ EXISTING 21 LF CULVERT ("EX -AT")
AT1-ATO REPLACED WITH 35 LF TEMPORARY CULVERT "TEMP -AT"
' (TEMPORARY STREAM IMPACT "S2"; 0.001 AC; 14LF)
y' TEMPORARY CULVERT "TEMP -AT" TO BE REPLACED WITH
PERMANENT 25 LF CULVERT "AT1-ATO"
O� O� (PERMANENT STREAM IMPACT "SY; 0.002 AC; 4LF)
/ - RE-ESTABLISH STREAM BANK WITH 3:1 MAX. SIDE
— SLOPES & LIVE -STAKING (SEE DETAIL ON FIGURE 3)
EXISTING STREAM i
TOP OF BANK i ) / / EXISTING 2' CONTOURS (TYP)
004-
i-7
PROPOSED RETAINING WALL (TYP)
° 3240
I
EXISTING STREAM I V A\ V A
CENTERLINE
\ I \ \ 1 (2" H� 1 :3241.85' I.E.: 3240.85
EXISTING 30' STREAM BUFFER
3250
3250
3240 3240
STORM AT PROFILE
IMPACTED
AREAS SUMMARY
PERMANENT STREAM IMPACT
LENGTH (LF)
AREA (ACRES)
S1
10
0.002
S3
4
0,002
TOTAL
14
0.004
TEMPORARY STREAM IMPACT
LENGTH(LF)
AREA (ACRES)
S2 (TEMP -AT)
14
0.001
S4
31
0.002
S5
20
0,002
PERMANENT WETLAND IMPACT
AREA (ACRES)
W1
0.002
W2
0.001
W3
0.001
W4
0.003
TOTAL
0.007
PROJECT DATA SUMMARY
ESTIMATED TREE CLEARING LIMITS: 16.0 ACRES
ESTIMATED % OF NEW IMPERVIOUS: 2.77%
SEVEN MOUNTAINS
STREAM & WETLAND IMPACT BULLETIN -FIGURE 2
NOVEMBER 2023
NCBELS #: C-2184

Dewatering Device Sump -hole
or dirt/sediment bag) Hose Discharge HWATER SURFACE
9 Or Pool CIRCULAR CULVERT
12" Min Depth STREAMBED MATERIAL
Dewatering Pump 2' Min Diameter
��;�x�
P (as needed)��°'���
y MIN COVER
^-^ (SEE TRENCH DETAIL)
Flow A A
Work Area Flow
Sandbag/Stone Barrier INITIAL BACKFILL
(SEE TRENCH DETAIL)
Intake
Hose
6" — 12"
HAUNCH
(SEE TRENCH DETAIL)
Discharge Hose f
Diversion Pump SUITABLE FOUNDATION
Discharge Pump Into Velocity Work Area STREAM CULVERT
Dissipater Length Not To Exceed NOT TO SCALE
That Which Can Be
Completed In One Day
Sheeting
Base Flow + 1 Foot
Work Area — (2 Foot Minimum)
Cross Section Of Sandbag/Stone Diversion F_
SECTION A —A
PUMP AROUND / DEWATERING
PLAN VIEW DETAIL
NOT TO SCALE
Civil
Design
Concepts, PA
NCBELS #: C-2184
TOP OF SLOPE
SECTION VIEW
JT END
TOP VIEW
= SEWN IN NECK
DIRTBAG
3
ZUPENING
ACCOMODATES UP
TO 4' DISCHARGE
LENGTH HOSE
NOTES;
1) DIRTBAG TO BE PLACED ON AGGREGATE OR STRAW
2) SEAMS MUST BE HIGH STRENGTH DOUBLE STITCHED "J" SEAMS
3) SEAM MUST BE TESTED UNDER ASTM D-4884, ACF TEST RESULTS AVAILABLE UPON REQUEST
4) THIS WORK SHALL CONSIST OF FURNISHING, PLACING AND REMOVAL OF ASSOCIATED DEVICE
4) CONTRACTOR IS REQUIRED TO USE A DIRTBAG DB-55 OR APPROVED EQUIVELENT
CROSS SECTION
T
DB55 FABRIC PROPERTIES
PROPERTY TEST METHOD MARV
TENSILE STRENGTH ASTM D-4632 205 LBS
ELONGATION ASTM D-4632 50%
CDR PUNCTURE ASTM D-6241 525 LBS
UV RESISTANCE ASTM D-4355 70Z
ADS ASTM D-4751 80 US SIEVE
PERMITTIVITY ASTM D-4491 1,4 SEC-1
FLOW RATE ASTM D-4491 90 GPM/SF
OFFICE
2831 CARDWELL ROAD
CTRICCORPORATE
ACF DB55 DIRTBAG
HMOND,VA 23234
PH: 808-448-3636
FOR ADDITIONAL INFORMATION PLEASE CONTACT ACT ENVIRONMENTAL
.. WWW.ACFENVIRONMENTAL.COM
PH: 800-448-3636 / WWW.ACFENVIRONMENTAL.COM
NOTES:
1. LIVE STAKES SHALL CONSIST OF BLACK WILLOW, SILKY DOGWOOD, SILKY WILLOW,
SYCAMORE AND NINEBARK PLANTED AS SHOWN IN DETAIL. 3 OF THE 5 SPECIES LISTED
SHALL BE USED.
2. LIVE STAKES SHALL BE INSTALLED IN BANK ON 3' CENTERS IN DISTURBED AREAS
OF CREEK BANK WITH DEAD —BLOW HAMMER. 4/5 OF STAKE SHALL BE IN THE GROUND.
4. CONTRACTOR SHALL CUT EXPOSED END OF LIVE STAKE AFTER INSTALLATION IF
DAMAGED DURING INSTALLATION.
5. LIVE STAKES SHALL BE IN ADDITION TO SEEDING REQUIREMENTS PER DETAILS AND
SPECIFICATIONS.
LIVE STAKE PLANTING DETAIL
DEWATERING BAG
NOT TO SCALE
SEVEN MOUNTAINS
STREAM & WETLAND
IMPACT
BULLETIN -FIGURE 3
AUGUST 2023
NOT TO SCALE