20211123 Ver 1_Impact Exhibit 3_20211101

Strickland, Bev
From: Don Sever, PE <[e-mail]>
Sent: Monday, November 1, 2021 10:41 AM
To: Cohn, Colleen M; Norton, April R CIV USARMY CESAW (USA)
Subject: RE: [External] RE: Highland View Subdivision
Attachments: HIGHLAND VIEW-IMPACT3.pdf
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Colleen,
We have adjusted exhibit 3 to show the existing gravel, shoulder, proposed sidewalk, and roadway fill. Is this what you
wanted to see? If correct, would we do the mitigation for roadway fill zone 1 at 3:1 ratio, and roadway fill zone 2 at
1.5:1 ratio?
If acceptable, we will update the exhibits and get you an official response to the SCM on exhibit 1 as well.
Thanks Don
Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
T
DESIGN AND ENGINEERING SERVICES
®EDP
From: Cohn, Colleen M <[e-mail]>
Sent: Wednesday, October 27, 2021 11:55 AM
To: Don Sever, PE <[e-mail]>; Norton, April R CIV USARMY CESAW (USA)
<[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
Don,
I would like to schedule a meeting to discuss this project. I believe it will be beneficial to discuss this road crossing in
particular via Teams.
I am available the following days:
i

October 29, 1pm — 4pm
November 3, 9am — 12pm
November 8, 9am — 12pm
Please let me know if one of the above dates will work for you.
Thanks,
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Don Sever, PE [mailto:[e-mail]]
Sent: Monday, October 18, 2021 10:43 AM
To: Cohn, Colleen M <[e-mail]>; Norton, April R CIV USARMY CESAW (USA)
<[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
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Colleen,
We have coordinated with NCDOT to minimize the roadway impacts for Terry Road crossing. The present gravel
roadway is 14', with 6' graded shoulders and then a utility corridor on both sides which comprises the 50' width.
For the proposed improvements, the typical section was modified to reduce the graded shoulders from 6' to 4', utilize
2:1 sideslopes, and eliminate the sidewalk from the west side of the roadway section. This reduction allows us to reduce
the stream impacts, wetland impacts and the buffer impacts. Please advise if these changes are acceptable to
you. With this reduction to the buffer impacts to 704 SF for zone 1, 406 SF for zone 2, would the state still require
mitigation for the impacts?
For Exhibit 1, the majority of the wetland impacts is due to the extension of Genesee Road to connect into the proposed
roadway from Terry Road. The minimum roadway centerline is 150' which is what is proposed. Pedestrian walkability
throughout the subdivision was required by the Durham Planning, which is the reason for the sidewalk on both sides of
the ditch section. For the pond, we minimized the footprint as much as possible. If we try to lower the pond elevation,
there is not enough vertical relief to outlet it without redoing the drainage system on Genesee Road. If you have
another alternative in mind please let me know and we can evaluate it further.
Thanks Don
2

Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
T
DESIGN AND ENGINEERING SERVICES
Ti rip
From: Cohn, Colleen M <[e-mail]>
Sent: Monday, October 11, 2021 5:04 PM
To: Don Sever, PE <[e-mail]>; Norton, April R CIV USARMY CESAW (USA)
<[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
Don,
I am not understanding. Your application states that the road is currently 50 feet wide. Your new impact maps show 20
feet of road, plus 12 feet of grass, plus 10 feet of sidewalk, plus 1 foot shoulders on each side (2 feet) for a total of 44
feet wide, which should fit within the footprint of the existing use. I'm not seeing that on the map. Your map has the
sidewalk on the eastern side of the road inside the buffer impacts but outside of the buffer impacts (within the existing
use) on the western side. Your maps also indicate additional impacts outside of the 50 foot wide existing road.
Does the current road have graded shoulders? What does the current cross section look like versus the proposed? Is it
required to have a sidewalk on both sides of the street? The grading appears to be due to the road crossing itself, not
the sidewalk. Please provide more details explain how these impacts are occurring solely from the sidewalk(s).
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Don Sever, PE [mailto:[e-mail]]
Sent: Monday, October 11, 2021 11:41 AM
To: Cohn, Colleen M <[e-mail]>; Norton, April R CIV USARMY CESAW (USA)
<[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
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Colleen,
3

All of the impacts are for the sidewalk in the buffer. We have revised the exhibit to show the sidewalk in plan and
section view. If this sufficient information to show that the buffer impact is due to the construction of the sidewalk? If
so, does this remove the requirement for buffer mitigation?
Thanks Don
Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
EEO
II]ESIGH AN© EN C NEERINC SERVICES
Title
vr
From: Cohn, Colleen M <[e-mail]>
Sent: Monday, October 11, 2021 9:27 AM
To: Don Sever, PE <[e-mail]>; Norton, April R CIV USARMY CESAW (USA)
<[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
Don,
There is a section of the riparian buffer rules that covers sidewalks, but you would need to clearly show what impacts
are for the sidewalk versus the road crossing and clearly specify the width of the sidewalk.
Your current impact maps and impact tables indicate that all of the buffer impacts for Exhibit 3 are for the road crossing.
DeelII .]
Allowable.
Allowable
Ups
Authorization
Allowable with
Mitigation Upon
Alit fit ation
Prohibited
(jj Graenu•ar& trails. sidewalks or linear
pedestriailticycle 'transportation systems:
(i) In Zone ; provided rhaT ]so built upon area is
added within the riparian buffer
x
[ti) In Zone 1 provided rtlat i10 built upon area is
added within the riparian buffer and the
installation does no! r2sllll in the removal of
lret(S)
(t l) Wberi truilE upon area 1s added to the npAR311
buffer_ equal to or tes3 than 10 feel wide 53z1I1
rwo foot wide shoulders. Shall bt located
nivside iolu I h]nless Mere is 340 Tracheal
alternative
X
X
ILvI Wheil blu€t upon area is added to the riparian
buffer. greater than 10 feet wide with two foot .
}ride shoulders. Shall be located vluSlde ZonC 1
lode 83 thffe i$ no practivii € alternative
4

Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Don Sever, PE [mailto:[e-mail]]
Sent: Friday, October 8, 2021 3:33 PM
To: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>; Cohn, Colleen M
<[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
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April,
I'm not sure where the buffer would be to calculate the impacts right now. I have an inquiry into NCDOT if we can move
the sidewalk to up against the edge of pavement to cut down the fill width by 10'. I think this would lessen the buffer
impacts the most. I will advise as to what they say next week.
Thanks Don
Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
m
DESIGN AND EMI HEERIN6 SERVICES
Title
yr
From: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Sent: Friday, October 08, 2021 3:16 PM
To: Don Sever, PE <[e-mail]>; Cohn, Colleen M <[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
Hi Don,
Thank you for taking the time to revise the plan sheet to address additional concerns. The Corps would not recommend
increasing stream impacts for stream relocation (channelization) when it is not necessary. You would have to
5

demonstrate additional avoidance and minimization efforts. What are the proposed buffer impacts with this new
alignment?
Thanks,
April
April R. Norton
Regulatory Division
US Army Corps of Engineers
CE-SAW-RG-R
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Phone: [phone], Ext. 57
Fax: [phone]
Email: [e-mail]
From: Don Sever, PE <[e-mail]>
Sent: Friday, October 8, 2021 1:31 PM
To: Cohn, Colleen M <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: [Non-DoD Source] RE: [External] RE: Highland View Subdivision
Colleen,
With this scenario we are making the pipe crossing more perpendicular (showing a 70 degree angle). We would go
upstream and relocate the stream to this new location. This increases the stream impact to 104'. Is this acceptable to
the state where we won't have to do any buffer mitigation?
April, do you see any issues with this?
Thanks Don
Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
11�
EEO
IT
ES CN AND EN INEERIN6 SERVICES
Title
yr
From: Cohn, Colleen M <[e-mail]>
Sent: Thursday, October 07, 2021 3:51 PM
To: Don Sever, PE <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
6

Mitigation is 3:1 for Zone 1 impacts and 1.5:1 for Zone 2 impacts for the Neuse River Basin. [15A NCAC 02B .0295(e)]
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Don Sever, PE [mailto:[e-mail]]
Sent: Thursday, October 7, 2021 3:28 PM
To: Cohn, Colleen M <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
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Colleen,
we have 4279 SF of zone 1 and 2067 SF of zone 2 impacts for the crossing. Is there any ratio that is needed for the
buffer mitigation?
Thanks Don
Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
OESIGH AND ENGINEERING SERVICES
EEO
Title
yr
From: Cohn, Colleen M <[e-mail]>
Sent: Thursday, October 07, 2021 2:02 PM
To: Don Sever, PE <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
Don,
7

The Division of Water Resources is a separate entity. Please provide the Division with details explaining how this feature
has avoided and minimized impacts to surface waters and wetlands and details showing the provisions to ensure the
remaining wetlands continue to support existing uses and aquatic life. [15A NCAC 02H .0506(b)(1)]
The impact maps indicate that there are buffer impacts outside of the footprint of the existing road. Only the portion of
the riparian buffer that contains the footprint of the existing and ongoing use is exempt from the buffer rules. [15A
NCAC 02B .0714(6)(c)]
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Don Sever, PE [mailto:[e-mail]]
Sent: Thursday, October 7, 2021 11:51 AM
To: Cohn, Colleen M <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
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Colleen,
When talking with April about this wetland impact, we mentioned that the location of the pond was selected to
minimize the impact to the wetlands given the topography constraints. The roadway connection to the south was
required by Durham County for public safety purposes which locked in that location. The wetland delineation showed a
narrow band that we felt was the best location to construct a stormwater device that has minimal impacts and would
allow to provide for hydrologic connectivity to the wetlands. The total wetland impact at this location was 3,237 SF or
0.07 acres.
For exhibit 3, we don't understand why buffer mitigation is required. We are placing the culvert in the exact location
that has existed for over 20 years (if not longer). For us to modify the crossing to perpendicular would require additional
stream impacts to move the stream channel to a perpendicular location. We feel that there are less environmental
impacts to this location than it is to relocate the stream. We are also using baffles in the pipe to maintain the natural
stream channel as best we can. If you feel we still need buffer mitigation, please let us know.
Thanks Don
8

Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
ESIGN AND ENGINEERING SERVICES
Ti rip
From: Cohn, Colleen M <[e-mail]>
Sent: Thursday, October 07, 2021 11:15 AM
To: Don Sever, PE <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
Exhibit 1- Please provide more details regarding avoidance and minimization of wetland impacts for this project. [15A
NCAC 02H .0506(b)(1)] This Office believes that the Stormwater Pond on Exhibit 1 can be moved or reconfigured to
avoid the impacts to the wetlands. Please revise the plans to avoid the impacts or provide a detailed explanation of why
this plan for the activity cannot be practically accomplished, reduced, or reconfigured to avoid impacts to the wetland.
Exhibit 3- The buffer impacts requested are impacts other than a perpendicular crossing of a stream or other surface
water. [15 A NCAC 02B .0714] Buffer mitigation is required for the proposed buffer impacts. You must seek mitigation
from a private mitigation bank and if not available, then the NC Division of Mitigation Services can be contacted. Please
provide a statement of availability for these impacts.
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Don Sever, PE [mailto:[e-mail]]
Sent: Monday, September 20, 2021 3:35 PM
To: Cohn, Colleen M <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: RE: [External] RE: Highland View Subdivision
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It is gravel, and will be paved to a 20' width.
9

Thanks Don
Sent from Mail for Windows
Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
T
DESIGN AND ENGINEERING SERVICES
EEO
Ti rle
`r
From: Cohn, Colleen M
Sent: Monday, September 20, 2021 3:33 PM
To: Don Sever, PE
Cc: Norton, April R CIV USARMY CESAW (USA)
Subject: RE: [External] RE: Highland View Subdivision
Hey Don,
I had a few minutes this afternoon, so I started looking at this project again before
In the application, you state that the current Terry Road is "unimproved a 50' wide
20' wide pavement with graded shoulders." What do you mean by "unimproved"?
dirt or gravel?
Thanks!
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Don Sever, PE [mailto:[e-mail]]
Sent: Friday, September 3, 2021 1:46 PM
To: Cohn, Colleen M <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: [External] RE: Highland View Subdivision
I spend tomorrow in the field.
corridor, and will be improved to a
What is currently there? Is the road
10

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Colleen,
Thanks for the email. I needed to check on a couple of things before I got back to you. We have concurrently addressing
your review comments and April's comments.
Regarding your comment, Exhibit 3 is showing the existing roadway culvert being replaced. The roadway was built prior
to any buffer rules being in effect. The existing pipe angle skew is 50 degrees. To make the culvert crossing more
perpendicular, we would have to relocate the stream. We didn't think that was a very good solution so we decided to
keep the pipe at its present angle. Reviewing your comment, we are showing the wetland impacts but failed to realize
that the buffer still exists even with this impact. The attached exhibit shows the revision. You mentioned about the
crossing of streams being allowable with mitigation. Is mitigation required in this instance?
On exhibit 5, since the roadway existed prior to the buffer rules, the zone 2 buffer stops where the maintenance ends
for the existing roadway. We have determined that to be approximately 30' from the centerline at this location.
Does this address your questions?
Thanks Don
Don Sever, PE
Senior Project Manager
Tel: [phone] x3239
Fax: [phone]
EEO
T
ES GN AND ENG N RING SERVICES
Title
yr
From: Cohn, Colleen M <[e-mail]>
Sent: Wednesday, September 01, 2021 4:35 PM
To: Don Sever, PE <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: Highland View Subdivision
Mr. Sever,
I am reviewing the application for the above reference project, and in order to complete the review process, some
additional information is required:
1. Please provide the Division a copy of your response to the August 30, 2021 email from the U.S. Army Corps of
Engineers requesting additional information. [15A NCAC 02H .0502(c)]
11

2. The road crossing in Exhibit 3 does not appear to be a perpendicular crossing (between 75 and 105 degrees),
and it is unclear from the plans if there are any buffer impacts at this crossing. Road impacts other than
perpendicular crossings of streams are allowable with mitigation upon authorization. Please provide more detail
about the angle of this crossing and buffer impacts. [15A NCAC 02B .0714(11)]
3. I am having difficulty seeing where Zone 2 of the riparian buffer is located in relation to the proposed
impervious roadway in Exhibit 5. Please provide an updated plan with the edges of Zone 2 and the proposed
roadway clearly defined. [15A NCAC 02B .0611(b)(1)(F)]
Thank you,
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
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13

PERMANEZON
ROADWAY FIL
E2 w
• fEX. SHOU
\\ ' TEMPORAR
\ ZONE 2- 228
TEMPORARY
\ \\ \ZO\ 1-41 S'
'Z
�\
IV€NT ZONE 1
A FILL
T' MPORARY STREA
14PACT 10 LF
PERMANENT
ZONE 2
ROADWAY FILL
GRAPHIC SCALE
25 0 12.5 25 50
( IN FEET )
1 inch = 50 ft.
WATER LINE
OVER 81" X 59" ARCH
CMP
HIGH
SILL
72 LF - 81" X 59" ARCH CMP
@ 1.5 % SLOPE
ROVIDE 1' HIGH
AFFLES @ 20' SPACING
CULVERT - PROFILE (1" = 60')
s 64
15672 F
0.36 A
S �L \
ONCRE E
SIDEWALK
PERMANENT
ZONE 2
ROADWAY
\ILL
TE-M-PORARY ZONE 1
NSF
-TEMPORARY
STREAM IMPACT
14110 LF
TEMPORARY ZONE 1
347 SF
ERRAANENT ZONE 2
O' ; 'YE7LL
TEMPORARY ZONE 2
24'6 SF
20' PAVEMENT
PROPOSED
GRADE
WATERLINE
5' OFF EOP (SEE PLAN FOR LOCATION)
STREAM, RIPARIAN BUFFER, AND WETLAND IMPACTS - EXHIBIT 3
PERMANENT
SF
AC
STREAM (LF) S-1
29
0.001
RIPARIAN BUFFER ZONE 1
ROADWAY FILL
1844
0.042
RIPARIAN BUFFER ZONE 2
ROADWAY FI LL
1082
0.025
ZONE 1 EXISTING GRAVEL
1196
0.027
ZONE 1 EXISTING SHOULDER
1105
0.025
ZONE 1SIDEWALK
690
0.016
ZONE 2 SIDEWALK
447
0.010
STREAM, RIPARIAN BUFFER, AND WETLAND IMPACTS - EXHIBIT 3
TEMPORARY
SF
AC
STREAM (LF) S-1
20
-
RIPARIAN BUFFER ZONE 1
ROADWAY FILL
1538
0.035
RIPARIAN BUFFER ZONE 2
ROADWAY F I LL
942
0.022
1' SHOULDER
@4%
2" S9.5A ASPHALT ON 8" ABC
TERRY ROAD SECTION - AT CULVERT CROSSING
NTS
STA. 18+05 to 19+70
LEGEND:
PERMANENT STREAM IMPACT
TEMPORARY STREAM IMPACT
PERMANENT WETLAND IMPACT
TEMPORARY WETLAND IMPACT
PERMANENT STORMWATER IMPACT
TEMPORARY STORMWATER IMPACT
PERMANENT ZONE 1 IMPACT
TEMPORARY ZONE 1 IMPACT
PERMANENT ZONE 2 IMPACT
TEMPORARY ZONE 2 IMPACT
EX. GRAVEL ZONE 1 IMPACT
EX. GRAVEL ZONE 2 IMPACT
EX. SHOULDER ZONE 1 IMPACT
EX. SHOULDER ZONE 2 IMPACT
SIDEWALK ZONE 1 IMPACT
SIDEWALK ZONE 2 IMPACT
DRAWING NAME:
19-0063 IMPACTS
SHEET NO.