20181400 Ver 1_More Info Received_20181106

Strickland, Bev
From: Mark S. Davis <[e-mail]>
Sent: Tuesday, November 06, 2018 10:41 AM
To: Annino, Amy M
Subject: RE: [External] RE: Lake James State Park - Cove Bridge Project
Attachments: Lake James State Park - Bridge - EC Scour Hole and Vegetative Conveyance.pdf; Lake
James State Park Flow Calculations.pdf
Follow Up Flag:
Flag Status:
Amy,
Follow up
Flagged
Attached is the revised EC plan sheet and flow calculations you requested. If you have any questions, please advise.
Thanks, Mark
From: Annino, Amy M <[e-mail]>
Sent: Thursday, November 01, 2018 11:32 AM
To: Mark S. Davis <[e-mail]>
Subject: RE: [External] RE: Lake James State Park - Cove Bridge Project
Thanks Mark. Can you also include the location / specs for the vegetative conveyance on the plan sheet?
Amy Annino
Environmental Specialist —Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ — Division of Water Resources
828 296 4656 office
amy.annino(cancdenr.gov
2090 U.S. Hwy. 70
Swannanoa, N.C. 28711
-�,'��Nothing Compares]
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties
From: Mark S. Davis <[e-mail]>
Sent: Thursday, November 01, 2018 11:15 AM
To: Annino, Amy M <[e-mail]>
Subject: [External] RE: Lake James State Park - Cove Bridge Project

External email. Do not click links or open attachments unless verified. Send all suspicious email as an attachment to
Amy,
It appears that the scour hole is encroaching upon Zone II. We will revise the plan sheets to keep the scour hole out of
the buffer. We plan on using both the scour hole and vegetative conveyance. I will get the slope when we redo the plan
sheet. I will get the revised drawings to you ASAP. Sorry for the confusion, I should have picked up the placement of the
scour hole before I submitted the application. If you have any further questions, please advise.
Thanks, Mark
Mark S. Davis
Environmental Specialist
Vaughn & Melton Consulting Engineers
40 Colonial Square
Sylva, NC 28779
[e-mail]
828-354-0117 (Office)
828-508-9670 (Cell)
%M
vaughn & mleldon
From: Annino, Amy M <[e-mail]>
Sent: Wednesday, October 31, 2018 4:04 PM
To: Mark S. Davis <[e-mail]>
Subject: Lake James State Park - Cove Bridge Project
Mark,
I am reviewing the Lake James bridge project and have a few questions.
Where is the scour hole located in relation to the Catawba buffer? What grade slope is this proposed on?
For diffuse flow, the PCN shows that a vegetated conveyance (lower SHWT) will be provided. Is this in relation to the
scour hole?
Thanks,
Amy Annino
Environmental Specialist — Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ — Division of Water Resources
828 296 4656 office
amy.annino(a)ncdenr.gov
2090 U.S. Hwy. 70

Swannanoa, N.C. 28711
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties

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Wnghn3Meldom

Lake James State Park
Stormwater Calculations
V&M Project Number: 31720-05
Peak 10 Year Storm Flowrate:
Q=CiA
C=0.2
i=7.13 in/hr (5 minute t,, 10 year storm, NOAA ATLAS 14 POINT PRECIPITATION
FREQUENCY ESTIMATE)
A=0.32 acres
Q=0.46 cfs
Vegetative Conveyance Channel Analysis:
Trapezoidal Ditch, 2:1 Side Slopes and 1' Channel Bottom Width at 2% slope
Flow: 0.46 cfs
Manning's n: 0.1718
Average Velocity: 0.531 fps
Max Shear Stress: 0.567 lb/ft2
Channel Depth: 0.45 ft (Add 0.5' free board)

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Revisions
No. I Date
Project Number: 1634
Date: 10.12.2018
Drawn by: BAS
CLEARING & GRUBBING
PHASE FOR EROSION &
SEDIMENTATION CONTROL
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