20180488 Ver 1_More Info Received_20180601

Homewood, Sue
From: Chris Hopper <[e-mail]>
Sent: Friday, June 1, 2018 4:03 PM
To: Homewood, Sue
Cc: Roden Reynolds, Bryan K CIV (US)
Subject: RE: [External] RE: East Davie County and Idols Rd PS/Sewer
Attachments: 1358-16-025 East Davie Wastewater Collection System - Rev 27.pdf; 1358-16-025 East
Davie Wastewater Collection System - Rev 32.pdf, 1358-16-025 East Davie Wastewater
Collection System - Rev 43.pdf, 1358-16-025 East Davie Wastewater Collection System
- Rev 62.pdf
Thank you, Sue:
Please find attached the locations and logs prepared by the geotechnical sub for this project.
Boring 2 (B-2) is adjacent to the Smith Creek crossing. No rock was encountered within 10 feet of the surface. The
proposed line would be accommodated within the first five feet below streambed in this location and no bedrock or
blasting is anticipated.
Boring 17 (B-17) is about 800' east of Stream SM. Due to vehicular accessibility limitations, hand augers were used to
perform the bore, located on an adjacent upland. The bore was terminated at 7' due to auger refusal. It is unclear
whether this is the result of bedrock or other obstruction to the hand augur. The contractor was asked about the
obstruction, and recalled dense sand being the issue, but did add that boulders and rock lenses are possible in the area.
At the proposed crossing of SM, bed material comprises sand, gravel, and cobble, with finer particles deposited on
point- and mid -channel bars. No bedrock or rock outcrops were observed in this vicinity. The Forsyth County soil survey
describes Chewacla soils (occurring in the vicinity of stream SM) as having a depth to bedrock of over five feet.
Because slopes degrade over time and contribute to aggradation in valleys, it is assumed that cover over bedrock would
be shallowest in uplands. We believe that seven feet is a conservative estimate of depth to bedrock at stream SM. In this
location, the pipe would be accommodated in the first six feet below streambed, and no bedrock or blasting is
anticipated.
However, geology at this location is mapped (1985, N.C.G.S. Geologic map of North Carolina) as an intrusive
'metamorphosed mafic rock, comprised of metagabbro, metadiorite, and mafic plutonic -volcanic complexes'. In
anticipation of the possibility of encountering rock the original note about performing the work at low flow and when no
rain is in the forecast will be revised to say the following. "Prior to the performing work required for a stream crossing,
the contractor shall dig test pits on each side of the stream to determine the materials present at the depth required for
the pipe installation across the stream. The contractor shall verify that all work required to cross the stream can be
completed at a time of low flow and prior to the next forecasted storm event."
Please advise if this addresses your concerns, or if additional detail is necessary.
As always, thanks!
Chris
Chris Hopper

CAROLINA ECOSYSTEMS INC.
[phone]
www.carolinaeco.com
From: Homewood, Sue [mailto:[e-mail]]
Sent: Thursday, May 31, 2018 12:37 PM
To: Chris Hopper <[e-mail]>
Cc: Roden Reynolds, Bryan K CIV (US) <Bryan. K. Roden [e-mail]>
Subject: RE: [External] RE: East Davie County and Idols Rd PS/Sewer
Chris,
I have one follow up question: You indicate that the crossings of Smith Creek and Stream SM will only take 1 day to
complete. Has geotechnical investigations occurred within this area to determine if rock is present. Excavation into rock
would likely delay the installation and increase our concern about these crossings.
Thanks,
Sue Homewood
Division of Water Resources, Winston Salem Regional Office
Department of Environmental Quality
336 776 9693 office
336 813 1863 mobile
Sue. [e-mail]
450 W. Hanes Mill Rd, Suite 300
Winston Salem NC 27105
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Chris Hopper[mailto:[e-mail]]
Sent: Tuesday, May 8, 2018 10:09 AM
To: Homewood, Sue <[e-mail]>
Cc: Roden Reynolds, Bryan K CIV (US) <Bryan. K. Roden [e-mail]>
Subject: [External] RE: East Davie County and Idols Rd PS/Sewer
Thank you, Sue:
Attached, please find our responses to concerns raised during your review. Please do not hesitate with additional
questions or concerns.
Regards,
Chris Hopper

CAROLINA ECOSYSTEMS INC.
[phone]
www.carolinaeco.com
From: Homewood, Sue [mailto:[e-mail]
Sent: Monday, April 23, 2018 4:42 PM
To: Chris Hopper <[e-mail]>
Cc: Roden Reynolds, Bryan K CIV (US) <Bryan. K. Roden [e-mail]>
Subject: East Davie County and Idols Rd PS/Sewer
Hi Chris,
Thank you for submitting such an informative and complete 401 application package. Your station by station description
of impacts and alignment changes that were made during the planning process to meet Avoidance and Minimization
was extremely helpful during my review. I appreciate all the time it took you to put this package together and greatly
appreciate the time and effort you, the engineers, and the clients took to minimize the impacts to streams and
wetlands.
I have just a couple minor questions:
For Smith Creek and Stream SM, can you please confirm that the engineer/client are certain that a complete pump
around of these larger channels is feasible, even if a storm event occurs during construction? I've come across a few
open cuts of larger channels where this has been problematic for various reasons.
It appears that the crossing of stream SH occurs where there is a meander in the channel and that the meander will be
within the permanent maintained corridor very close to the sewer line. I have some of the same concerns with this
potential scenario as I would with an area where construction may be occurring within 10' of a stream bank, that the
channel may not remain stable when the trench construction is so close even with riprap installation after
construction. Can you provide me with a little more information about the stream that may help me determine the level
of my concern please. You list it as a perennial stream but does it show indication of being unstable or subject to very
flashy storm events/flows?
There is a note on the plans to the owner that the maintained easement should only be 15' wide in wetland areas. In
accordance with GC4133 can you please modify the note to state "in wetland areas and at stream crossings".
Thanks,
Sue Homewood
Division of Water Resources, Winston Salem Regional Office
Department of Environmental Quality
336 776 9693 office
336 813 1863 mobile
Sue. [e-mail]
450 W. Hanes Mill Rd, Suite 300
Winston Salem NC 27105

PROJECT:
East Davie Wastewater Collection System
Davie/Forsyth County, North Carolina
HAND AUGER BORING LOG: B-17
1358-16-025
NOTES: Borehole backfilled With auger
DATE STARTED: 5/12/16
DATE FINISHED: 5/12/16
cuttings.
EQUIPMENT: Hand
Auger/DCP
SAMPLING METHOD: Hand Auger
PERFORMED BY: S. Lacz
WATER LEVEL: Dry at TOB
U
z
O
DYNAMIC CONE PENETRATION
w
J
w
o w
MATERIAL DESCRIPTION
w
a W
RESISTANCE
a
LU v
(blows/1.75 in.)
0
Lu
10 20 30 60 80
o
TOPSOIL
1
6 inches 715.00-
2-
-
12
RESIDUUM: SILTY SAND (SM) 714.00
3
orange brown, medium to fine, moist 713.00-
4-
712.00
-
14
-
SILTY SAND (SM) 711.00
6
tan brown, medium to fine, moist to wet 710.0
-H
16
7
Boring terminated at 7 ft due to auger refusal 709.00
20+
*S&ME H 1. PENETRATION RESISTANCE IS THE NUMBER OF BLOWS OF 10.1
HAMMER FALLING 22.6 IN., DRIVING A 0.79 IN. O.D. 60 DEGREE CONE 1.75 IN.
Page 1 of 1

PROJECT: East Davie Wastewater Collection System
Davie/Forsyth County, North Carolina
BORING LOG B-2
S&ME Project No. 1358-16-025
NOTES: Borehole backfilled with auger cuttings
DATE DRILLED: 4/14/16 ELEVATION: 722.0 ft
and a commercial hole closure device placed
near the surface.
DRILL RIG: Diedrich D-50 BORING DEPTH: 10.0 ft
DRILLER: J. Wino WATER LEVEL: 3 ft at TOB
HAMMER TYPE: 140 -Ib auto LOGGED BY: M. Hayes
SAMPLING METHOD: Split soon
NORTHING: 817089 EASTING: 1579505
DRILLING
METHOD:
2'/4" H.S.A.
w
BLOW COUNT
U
w
Oz 0-
/CORE DATA
STANDARD PENETRATION TEST DATA
w
= ^
_
c) o
(blows/ft)
a
W-
a o
MATERIAL DESCRIPTION
0
a
� J
w �,
>
w
w-
a_ 0-
/REMARKS
<
Q
-i
W
Q 2
U)
co
N M
10 20 30 6080
z
TOPSOIL
1 inch
1
1
1
1
2
POSSIBLE FILL: SANDY SILT (ML)
-�z
very soft, brown tan, fine, wet2
2
2
2
a
5
ALLUVIUM: SANDY CLAY (CH)
717.0
soft, gray, fine, moist
3
1
2
5
7
POSSIBLE ALLUVIUM: CLAYEY SAND ( SCS
loose, gray, fine, moist
RESIDUUM: SILTY SAND (SMS
4
4
6
7
13
10
medium dense, tan gray, fine, wet
712.0
Boring terminated at 10 ft
NOTES:
1. THIS LOG IS ONLY A PORTION OFA REPORT PREPARED FOR THE NAMED
PROJECT AND MUST ONLY BE USED TOGETHER WITH THAT REPORT.
Z BORING SAMPLING
I NGITH AND
P DN 5 6ATION TEST DATA IN GENERAL
3. STRATIFICATION AND GROUNDWATER DEPTHS ARE NOT EXACT.
4. WATER LEVEL IS AT TIME OF EXPLORATION AND WILL VARY.
•
Page 1 of 1

Background image obtained from Google Earth dated 10/5/2015 -4� Approximate Boring Location
SCALE: None FIGURE NO.
BORING LOCATION PLAN
DRAWN BY: SWL S&ME East Davie Wastewater Collection System
CHECKED BY: SEH Davie/Forsyth County, North Carolina 2G
ENGINEERING • TESTING
DATE: May 2016 ENVIRONMENTAL SERVICES PROJECT NO.: 1358-16-025

Background image obtained from Google Earth dated 10/5/2015 1$� Approximate Boring Location
SCALE: None FIGURE NO.
BORING LOCATION PLAN
DRAWN BY: SWL��� East Davie Wastewater Collection System
CHECKED BY: SEH ~� Davie/Forsyth County, North Carolina 2B
ENGINEERING TESTING
DATE: May 2016 ENVIRONMENTAL SERVICES PROJECT NO.: 1358-16-025