HomeMy WebLinkAbout20230623_ADI_Received From: Cole Atkins
To: Parr,Adam
Cc: Summers,Kimberly M; Hunter Bratton
Subject: [External] RE: Knightdale teams call
Date: Thursday,June 22,2023 3:55:24 PM
Attachments: imaae001.Dna
Plan Set Page 1 Revised 6-22-23.Ddf
Western Ditch Culverts.Ddf
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the
Report Message button located on your Outlook menu bar on the Home tab.
Adam and Kimberly,
Thank you both for your time today on Teams. I've attached a revised page 1 of the Knightdale
Quarry permit mod plans with lat/long points around the mining permit boundary. I have also added
to the map the existing 3 x 30" pipes at the end of the western stormwater ditch, and attached
calculations for the proposed 30" CMP pipes that will provide additional access across that same
ditch. Each proposed culvert pipe will pass 40.2 cfs (total of 120.6 cfs for 3 pipes) before
overtopping the ditch. I am confident that these three pipes will easily pass any storm event without
overtopping the ditch and going offsite.
Also, our plotter is being serviced today, so I am hopeful that I can deliver 2 printed copies
tomorrow. We will have them to you early next week at the latest.
Please let me know if you have any questions or need any additional information.
Sincerely,
Cole
L. Cole Atkins
Environmental Supervisor/Chief Geologist
Wake Stone Corporation
(919) 266-1100
}
WAKE STONE
(:OR PO RATION
From: Parr, Adam <adam.parr@deq.nc.gov>
Sent:Thursday,June 22, 2023 10:34 AM
To: Cole Atkins<coleatkins@wakestonecorp.com>
Subject: Knightdale teams call
https://teams.microsoft.com/1/meeiup-
a oin/19:meeting ND15MzRhMTMtYmRmYSOOYzA3LWJkNmMtZDZkNeg5YzNIYTNipthread.v2/0?
context=%7B%22Tid%22:%227a7681dc-b9d0-449a-85c3-
ecc26cd7ed19%22.%220id%22:%22c676126d-d2e5-405f-a55f-48db50a85d95%22%7D
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third
parties by an authorized state official.
Culvert Analysis Spreadsheet Ver 5/2012
Client: Knightdale Quarry County: Wake Date: 22-Jun-23
Design By: LCA Checked By: LCA Date:
Comments: 3 x 30" CMP will pass 120.6 cfs without overtopping ditch
Inputs:
Headwater(Upstream Water Surface) Elevation: 267.00 Feet
Culvert Inlet Invert Elevation: 262.00 Feet
Culvert Diameter: 30.00 Inches Select Culvert Material: JCMP
Length of Culvert: 65.00 Feet Select Culvert Inlet Type: I Projecting-Thin Edge
Culvert Outlet Invert Elevation: 259.00 Feet
Tailwater(Downstream) Elevation: 259.00 Feet
Outputs:
CAPACITY = 40.2 cfs INLET CONTROLS (Submerged Equation)
Manning's n value: 0.024 CMP
Entrance Coefficient, Ke: 0.9 Projecting-Thin Edge