20200767 Ver 1_EXPLANATION S&EC Response_20200630

Strickland, Bev
From:
Bob Zarzecki <[e-mail]>
Sent:
Monday, June 29, 2020 2:34 PM
To:
Johnson, Alan
Cc:
Scott Kiger; Spencer McNab
Subject:
[External] RE: Addison apt 20-767 - S&EC Response
Attachments:
The Addison - IMPACT MAPS.pdf
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nc. ov
Alan
The primary water budget for the proposed impacted section of stream is surface flow and not
groundwater. There is a head -cut not too far below the outlet end of the proposed bypass pipe and
riprap dissipater where the stream picks up some groundwater flow. The pipe depicted on the plans
will bypass offsite surface flows above the jurisdictional stream origin back to the section of stream
above the head -cut, after flowing through an appropriately sized riprap dissipater to provide a non -
erosive discharge. As such, I was not too concerned about any significant impacts to the hydrology of
the avoided/retained sections of stream and did not see a need for a "French drain" or the like.
I've copied Scott Kiger and Spencer McNab of DRG on this email. They're the project designers and
can answer your question about reducing impacts better than I can, in case I misstated anything
below.
That said, here's what they told me, when I asked the same question, and you're correct that it was in
part due to the area "A" being brought up to grade.
"The extended slope is to accommodate the road crossing necessary for connecting both sides of the
development for residential connection and Fire Safety. The extended slope was designed in lieu of
installing a 30' tall wall. The slope was minimized by using a combination of 2:1 and 3:1 slopes but
required a 10' wide bench when using the steeper slopes."
Based on this, I understand that a 30' tall wall would be required to otherwise reduce the impacts.
I will applaud them for avoiding the more significant section of stream from the head -cut down to the
pond.
I hope this information is helpful.
Cheers,
Bob Zarzecki
Wetlands Department Manager
Soil & Environmental Consultants, PA
North Quarter Office Park

8412 Falls of Neuse Road, Suite 104
Raleigh, NC 27615
[phone] Office Phone
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From: Johnson, Alan <[e-mail]>
Sent: Monday, June 29, 2020 1:40 PM
To: Bob Zarzecki <[e-mail]>
Subject: Addison apt 20-767
Can't make out the reason for the 112 ft of stream fill. The overall plan is zoomed to far out
and figure 4 is zoomed to far in. It looks like just fill material
Is area A being brought up to grade?
Would a "French" drain be appropriate to maintain hydrology (orange)? Current flow path is
purple
Would it make more sense to reduce the impact and discharge SW through the headwall
(blue)?

DWR
Division of WAter Resources
Alan D Johnson — Senior Environmental Specialist
NC Dept. of Environment & Natural Resources (NCDENR)
Division of Water Resources - Water Quality Regional Operations
610 East Center Ave., Suite 301, Mooresville, NC 28115
Phone: [phone] Fax: [phone]
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 unless the content is exempt by statute or other regulation.

JURISDICTIONAL
PERENNIAL STREAM %B/
DUKE ENERGY
CAROLINAS, LLC
PID #4589719144000
(CABARRUS COUNTY)
APPROX. WETLAND AREA W4
1,120 SF (0.03 AC)
GWR CAROLINAS PROPERTY
OWNER LLC
PID #45899170630000
GWR CAROLINAS
PROPERTY OWNER LLC
PIN: 45898173110000
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JURISDICTIONAL //�rl 30' BUFFER, (TYP.)�
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WETLAND AREA Wl
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DAVID M. AUMAN
PENNY D. AUMAN 1� ��
PID #029-561-10 \\
(MECKLENBURG OLD HOLLAND ROAD, LLC
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(MECKLENBURG COUNTY)
LLIAM E, CAUDLE
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JURISDICTIONAL INTERMITTENT
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WILLIAM E. CAUDLE
PID #45889927890000
(CABARRUS COUNTY)
WILLIAM E. CAUDLE
PID #029-561-07
(MECKLENBURG
COUNTY)
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DESIGN
RESOURCE
GROUP
LANDSCAPE ARCHITECTURE
CIVIL ENGINEERING
TRANSPORTATION PLANNING
245' W lkinson Blvd, Ste 200 Charlotte, NC 28208
704.343.0608
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SCALE: 1" = 300'
PROJECT*
DRAWN BY:
CHECKED BY:
036-023
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APRIL 28, 2020
REVISIONS
I 1.0
Copyright ©2020 Design Resource Group, PA This plan or drawing and any accompanying documents or calculations are the property of Design Resource Group, PA; and are intended solely for the use ofthe recipient noted. No third party use or modification is permitted without written authon,mbon.

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DESIGN
RESOURCE
GROUP
LANDSCAPE ARCHITECTURE
CIVIL ENGINEERING
TRANSPORTATION PLANNING
2459 Wilkinson Blvd, Ste 200 Charlotte, NC 28208
704.343.0608
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PROPOSED SITE
PLAN &
IMPACT
AREAS
0 100 200 O
SCALE: 1" = 200'
PROJECT #:
DRAWNBy:
CHECKED BY:
036-023
WSM
SK
APRIL 28, 2020
REVISIONS:
2.0
Copyright ©2020 Design Resource Group, PATH, plan ordrawing and anya=ompanying documents orcalculations are the property of Design Resource Group, PA; and are intended solely for the use of the recipient noted. No third party, use or modification is permitted without written auffunzmbon.

TEMPORARY IMPACTED MAINTAINED /
(WITHIN ELECTRICAL EASEMENT
WETLAND AREA W2 206 SF (0.005 AC)
- 30'x12'x6' DEEP
_ BORING PIT
OLD HOLLAND ROAD ELECTRICAL EASEMENT, (TYP.
I
� ----7-;- LINE TO BE BORED UNDER STREAM
SEE SHEET 3.1 FOR PROFILE
6'x12'x6' DEEP I
LINE TO BE BORED UNDER STREAM/ROAD RECEIVING PIT - UT
SEE SHEET 3.2 FOR PROFILE-
24'x12'x6' DEEP _
— RECEIVI�PIT -
x x �{
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x x x :.fix x .. x / i — , 77p. AREA W2
x x ` x x x x / / / RF�TU 4,638 SF (0.106 AC) /
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EXISTING TEMP. \ \
I " UTILITY EASEMENT \
I \ 'EXISTING TEMP30' UNDISTURBED BUFFER, (TYP.) \ \ \
ICONSTRUCTION* I I I 10' VEGETATION BUFFER, (TYP.) \ \
EASEMENT I I I ( 30' SANITARY SEWER EASEMENT, (TYP.) \\
MPORARYI I SANITARY SEWER LINE, (TYP.)
IMPACTED WETLANDS AR FORESTED
v 30' I
634 SF (0.015 AC) v I I I I TREE PROTECTION FENCE, (TYP. \ \
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NOTES:
1. TO THE EXTENT POSSIBLE, RETURN THE AREA TO THE EXISTING GRADE. REMOVAL OF EXISTING TOPSOIL AND OTHER VEGETATION
SHOULD BE AVOIDED WHERE POSSIBLE.
2. IMPACTED WETLANDS TO BE RETURNED TO PRE-EXISTING CONDITIONS FOLLOWING TEMPORARY IMPACTS; 12" TOPSOIL PLACED ON
FABRIC AND REPLACED UPON COMPLETION. AREA TO BE SCARIFIED AND TO RESEEDED WITH NATIVE WETLAND SEED MIX TO
SPECIFICATIONS PER SEED MIX. MULCH AFTER SEEDING WITH APPROXIMATELY 2 TONS OF GRAIN STRAW PER ACRE.
3. REMEDIED AREAS TO BE REASONABLY FREE OF WWEDS, TRASH, DEBRIS, AND OTHER FOREIGN MATERIALS.
4. CONTRACTOR TO MINIMIZE THE USE OF CONSTRUCTION EQUIPMENT WITHIN THE RESTORATION AREA WITH THE GOAL OF AVOIDING
EXCESSIVE COMPACTION OF EXISTING SOIL.
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DESIGN
RESOURCE
GROUP
LANDSCAPE ARCHITECTURE
CIVIL ENGINEERING
TRANSPORTATION PLANNING
2459 Wilkinson Blvd, Ste 200 Charlotte, NC 28208
704.343.0608
www.drgrp.corn
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USACE #: (SAW-2019-00556)
IMPACT AREA 1
0 15 30 O
SCALE: 1" = 30'
PROJECT #: 036-023
DRAWN By: wsM
CHECKED BY: sK
APRIL 28, 2020
REVISIONS:
3.0
Copyright 9 2020 Design Resource Group, PA Thls plan or drawing and any accompanying tlocuments or calculations are the property of Design Resource Group, PA'.. and are intentled solely for the use of the recipient notetl. No thiM party use or motlification Is permitted without written authorization.

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DESIGN
RESOURCE
GROUP
LANDSCAPE ARCHITECTURE
CIVIL ENGINEERING
TRANSPORTATION PLANNING
2459 Wilkinson Blvd, Ste 200 Charlotte, NC 28208
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SEWER
CROSSING
PROFILE
0 20 40
SCALE: 1" = 40'
PROJECT #: 036-023
DRAWN By: wsm
CHECKED BY: SK
APRIL 28, 2020
REVISIONS:
3.1
Copyright 9 2020 Design Resource Group, PA Thls plan or drawing and any accompanying tlocuments or calculations are the property of Design Resource Group, PA'.. and are intentled solely for the use of the recipient notetl. No thiM party use or motlification Is permitted without written authorization.

610
590
6+00
/
PUBLIC SSMH-03 /
RIM:601.37
INV IN:595.26 )
INV IN:595.26 8")
INV OUT:59476 (8")
15LF 8" SAN SWR @ 1.04%
7+00
PUBLIC SSMH-04
RIM: 609.36
INV IN:600.33 (8")
/ INV OUT:600.13 (8")�
TOP OF BANK
\ ELEV=604.18
\TOP OF BANK
ELEV=603.73
BOTTOM OF STREAM 1
ELEV=603.41
40 LF 8" RJ DIP
SANITARY SEWER IN
18" STEEL CASING WITH
RESTRAINING COLLARS
TO BE JACK & BORED
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J 590
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DESIGN
RESOURCE
GROUP
LANDSCAPE ARCHITECTURE
CIVIL ENGINEERING
TRANSPORTATION PLANNING
245' Wilkinson Blvd, Ste 200 Charlotte, NC 28208
704.343.0608
www.drgrp.com
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SEWER
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0 20 40
SCALE: 1" = 40'
PROJECT #: 036-023
DRAWN By: WSM
CHECKED BY: sK
APRIL 28, 2020
REVISIONS:
1 3.2
Copyright 9 2020 Design Resource Group, PA This plan or drawing and any accompanying tlocuments or calculations are the property of Design Resource Group, PA'.. and are intentled solely for the use of the recipient notetl. No thiM party use or motlification Is permitted without written authorization.

dr
DESIGN
RESOURCE
GROUP
LANDSCAPE ARCHITECTURE
CIVIL ENGINEERING
TRANSPORTATION PLANNING
2459 Wilkinson Blvd, Ste 200 Charlotte, NC 28208
704.343.0608
—drgrp.com
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USACE #: (SAW-2019-00556)
IMPACT AREA 2
0 10 20 O
SCALE: 1" = 20'
PROJECT* 036-023
DRAWN BY: WSM
CHECKED BY: SK
APRIL 28, 2020
REVISIONS:
we
Copyright ©2020 Design Resource Group, PA This plan or drawing and any accompanying documents or calculations are the property of Design Resource Group, PA; and are intended solely for the use of the recipient noted. No third party use or modification is permitted without written authodza6on.

IV V I tJ:
1. TO THE EXTENT POSSIBLE, RETURN THE AREA TO
THE EXISTING GRADE. REMOVAL OF EXISTING TOPSOIL
AND OTHER VEGETATION SHOULD BE AVOIDED WHERE
POSSIBLE.
2. IMPACTED WETLANDS TO BE RETURNED TO
PRE—EXISTING CONDITIONS FOLLOWING TEMPORARY
IMPACTS; 12" TOPSOIL PLACED ON FABRIC AND
REPLACED UPON COMPLETION. AREA TO BE SCARIFIED
AND TO RESEEDED WITH NATIVE WETLAND SEED MIX
TO SPECIFICATIONS PER SEED MIX. MULCH AFTER
SEEDING WITH APPROXIMATELY 2 TONS OF GRAIN
STRAW PER ACRE.
3. REMEDIED AREAS TO BE REASONABLY FREE OF
WWEDS, TRASH, DEBRIS, AND OTHER FOREIGN
MATERIALS.
4. CONTRACTOR TO MINIMIZE THE USE OF
CONSTRUCTION EQUIPMENT WITHIN THE RESTORATION
AREA WITH THE GOAL OF AVOIDING EXCESSIVE
COMPACTION OF EXISTING SOIL.
I I
I �
TEMPORARY IMPACTED
FORESTED WETLAND AREA W4
356 SF (0.06 AC)
30' SANITARY SEWER EASEMENT, (TYP.}
SANITARY SEWER LINE, (TYP.}
NOW OR FORMERd Y I
MARKETPLACE A T
CONCORD MILL
DB 10747/32
TRACT F2, P I
40/30-31 I
EXISTING STORM PIPE-,
� I i
10' VEGETATION BUFFER, (TYP.),
I r J
30' UNDISTURBED BUFFER, (TYP.)-
I
I
I
EXISTING STORM EASEMENT, (TYP
12'x3O'x12' DEEP BORING PI
I
LINES TO BE BORED UNDER WETLANDS AND ROAD, (TYP.
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n XISTING RIP —RAP
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GREAT WOLF
LODGE BMP
SHEET 3.0 FOR
7VING PIT
I
OLD HOLLAND ROAD
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DESIGN
RESOURCE
GROUP
LANDSCAPE ARCHITECTURE
CIVIL ENGINEERING
TRANSPORTATION PLANNING
2459 Wilkinson Blvd, Ste 200 Charlotte, NC 28208
704µ343.0608
tlrgrp.com
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USACE #: (SAW-2019-00556)
IMPACT AREA 3
0 15 30 O
SCALE: 1" = 30'
PROJECT #: 036-023
DRAWN By: wsm
CHECKED BY: SK
APRIL 28, 2020
REVISIONS:
--) �*� �� i 1 i i I 5.0
Copyright 9 2020 Design Resource Group, PA Thls plan or drawing and any accompanying tlocumenis or calculations are the property of Design Resource Graup, PA'.. and are intentled solely for the use of the recipient notetl. No thiM party use or motlification Is permitted without written authorization.