20210459 Ver 1_More Information Received_20211029

Staff Review Form
NORTH CAROLINA
Envlronm¢ntcl Qvofiry
Updated September 4, 2020
Staff Review
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ID# *
20210459
Version* 1
Is this project a public transportation project?*
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• No
Reviewer List: * Chad Turlington:eads\ccturlington
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Fayetteville Regional Office - [phone]
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Project Submittal Form
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mandatory questions are answered.
Project Type: *
For the Record Only (Courtesy Copy)
New Project
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More Information Response
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Stream or Buffer Appeal
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Project Contact Information
Name: Wyatt I brown
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Email Address: [e-mail]
Project Information
Existing ID #: Existing Version:
20210459, 1
20170001 (no dashes) 1
Project Name: Weeks Sand Pit 3
Is this a public transportation project?
Yes
No
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
Yes No Unknown
County (ies)
Harnett
Please upload all files that need to be submited.
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James' email response.pdf 66.53KB
Only pdf or kmz files are accepted.
Describe the attachments or
comments:
I'm attaching the geologist response to questions about water flow.
thanks
Wyatt
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Wyatt;
I received the email with questions about the Weeks Sand mine and associated wetland crossings. The
three questions posed are:
1. How deep are the pits to be excavated?
2. What is the distance between the wetland boundaries and pit edge?
3. Will there be a lateral drainage effect to the wetlands associated with the mining operation? If
not, how was that determination made? Was the Skaggs Method applied? If so, please provide a
copy of that report at your earliest convenience.
I think it is important first to understand that this deposit is a "sandhills" sand deposit. As you are
aware, the Sandhills area of North Carolina is an unusual geological region characterized by sand
"dunes" that are deposited by wind (eolian) thousands of years ago. These unique deposits are quite
different in many aspects from the "alluvial" sand and gravel deposits found in most of eastern North
Carolina. A Sandhills sand deposit is found on the tops of hills and is mined by primarily excavating the
higher elevations. Most sandhills sand mines never extend below the "water table" and are better
described as "cutting off the top of a hill". Therefore, there are no real "pits" as mentioned in the
questions. If you look at the several mines in that area, they have not extended below water table, and
have retained the general topography, just several feet lower than before. In the mineral evaluation of
this area, the "water table" was never encountered in many excavations.
So, to answer question 1, there is no real "pit". The edge of the excavation will begin at a zero thickness
at the edge and extend towards the center as a "wedge". The thickness of the deposit will determine
the amount of sand excavated. The total thickness of the sand deposit is not known, so the total depth
of the excavation is not known. The Reclamation Plan anticipates that the mining area will be left as a
lake, but that will depend on the depth mined. The final mining area may have no depth at all but
remain at a higher elevation in the center. Again, picture cutting off the top of a hill, but leaving the hill
intact.
Question 2 is a standard regulation of all Mining Permits; a 50 foot undisturbed buffer is to be
maintained between any disturbed area and any wetland or watercourse.
Question 3, is simply answered "no", there will not be "lateral drainage", and no studies were necessary.
It is again important to understand the difference between Sandhills sand deposits and Coastal Plain
alluvial deposits. In most Sandhills mines, the final excavation depth will usually stay well above the
elevation of the wetland, so it isn't an issue.