20190884 Ver 2_More Info Received_20201021

Strickland, Bev
From: Digeronimo, Alex <[e-mail]>
Sent: Wednesday, October 21, 2020 3:32 PM
To: Homewood, Sue
Subject: Re: [External] White Mitigation Project (NCDMS Project No. 100112) - Buffer
Authorization Electronic Submittal
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ail. Do not click links or open attachments unless you verif . Send all suspicious email as an attachm
Sue,
Please see my responses below:
Pipe removals: Estimated area of disturbance to remove existing crossing and regrade channel banks.
Estimate is conservative and also included adjacent areas of soil path to be ripped and prepped for
seeding and planting. Buffer impact areas counted as the same for each pipe removal for consistency.
Crossing Installations (1, 2, & 3):
0 Pipe lengths are 18 feet. Top width of channels are conservatively estimated to be 10 feet (18 ft
X 10 ft= 180 ft^2)
0 Soil path is to be 10 feet wide. Estimating 16 feet of compacted soil path from top of bank on
both sides of crossing (16 ft X 2 X 10 feet= 320 ft" 2)
0 180 ft ^2 + 320 ft^2= 500 ft A (conservative estimate)
Banks Stabilization: Areas shown in table were measured directly from bank stabilization polygons in
the mitigation plans. Polygons in mitigation plans were created from a field survey of actively eroding
vertical channel banks. Bank stabilization footprints are based on the sloping of vertical banks back to a
2.5:1 slope.
Cattle Exclusion Fencing: Estimated area was calculated incorrectly. Buffer zones were calculated by
buffer crediting zones and not buffer zones as indicated in the buffer authorization guideline document.
Please find the revised Cattle Exclusion Fencing impact areas below. It is worth noting that the area is
based on a linear foot of fence to be installed within each buffer zone multiplied by 1.5 foot width to
account for maintenance along the fence line.
o Updated Cattle Fencing areas are as follows:
• UT 1
• Zone 1= 117 linear feet X 1.5 feet = 175.5 ft A
• Zone 2= 60 linear feet X 1.5 feet = 90 ft^2
• UT 2
• Zone 1= 258 linear feet X 1.5 feet = 387 ft^2
• Zone 2= 145 linear feet X 1.5 feet= 217.5 ft^2
• UT Muddy Creek
• Zone 1= 247 linear feet X 1.5 feet= 370.5 ft^2
• Zone 2= 84 linear feet X 1.5 feet= 126 ft^2
• UT 3
0 Zone 1= 37 linear feet X 1.5 feet= 55.5 ft^2

• UT 4
• Zone 1= 68 linear feet X 1.5 feet= 102 ft" 2
• Zone 2= 20 linear feet X 1.5 feet= 30 ft" 2
• UT 5
• Zone 1= 68 linear feet X 1.5 feet= 102 ft" 2
• Zone 2= 23 linear feet X 1.5 feet= 34.5 ft" 2
Sorry about the mistake. Please let me know if anything needs to be corrected or updated in the submittal
package based on this response.
Thank you,
Alex DiGeronimo, PE Associate Consultant
Cell: 843.830.1536
Email: [e-mail]
Land Management Groups Environmental Consultants
Charleston, SC 29412 1 www.lmgroup.net
On Tue, Oct 20, 2020 at 6:43 PM Homewood, Sue <sue.homewood(cr�,ncdenr.gov> wrote:
Hi Alex,
Can you please clarify for me how you came up with the amounts you listed in the table of the application?
Thanks.
Sue Homewood
Division of Water Resources, Winston Salem Regional Office
Department of Environmental Quality
336 776 9693 office
336 813 1863 mobile
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[e-mail]
450 W. Hanes Mill Rd, Suite 300
Winston Salem NC 27105
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From: Digeronimo, Alex <[e-mail]>
Sent: Tuesday, September 29, 2020 3:00 PM
To: Homewood, Sue <sue.homewood(cr�,ncdenr.goy>
Cc: Miller, Vickie M. (Raleigh) <[e-mail]>
Subject: [External] White Mitigation Project (NCDMS Project No. 100112) - Buffer Authorization Electronic
Submittal
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
port. spamgm. gov
Good afternoon Sue,
As we discussed on the phone this morning, the White Buffer Mitigation buffer authorization has been
submitted electronically for your review.
Please let me know if you have any questions or require additional information.
Thank you,
Alex DiGeronimo, PE I Associate Consultant
4LMG
LAND MANAGEMENT GROUP
. DANEY company

Cell: 843.830.1536
Email: adigeronimo@lm rg oup.net
Land Management Groups Environmental Consultants
Charleston, SC 29412 1 wwwlmgroup.net