20150610 Ver 2 _Restoration of temporary impacts documentation _20170808

Homewood, Sue
From:
Dishmon, Joyce Martin <[e-mail]>
Sent:
Tuesday, August 08, 2017 1:38 PM
To:
Bailey, David E CIV USARMY CESAW (US); Homewood, Sue; Leonard, Shannon; Gantt, Matt
Cc:
Newcomb, Dana H; Pifer, Anne H.
Subject:
Sediment Loss at DR -130
Attachments:
Stream Crossing #1 - Restoration 1.pdf, Stream Crossing #1 - Restoration 2.pdf, Stream
Crossing #2 - Restoration 1.pdf, Stream Crossing #2 - Restoration 3.pdf, Stream Crossing #2 -
Restoration 3.pdf, Stream Crossing #2 - Restoration 4.pdf; Stream Restoration 1.pdf, Stream
Restoration 2.pdf, Stream Restoration 3.pdf, Stream Crossing Remediation #2.pdf, Stream
Crossing Remediation #3.pdf, Stream Crossing Remediation #4.pdf; Stream Crossing
Remediation #5.pdf
David,
I have attached photos from the remediation and restoration post Stream Crossing removals for your file and review. Duke
Energy decided to remove both stream crossings based upon risk mitigation.
Thank you for your review. Please advise of questions and/or comments.
Remediation:
Restoration
Regards,
Jqo,yce,,D"Amon
Sr. Environmental Specialist
ESH CCP Permitting & Compliance
Duke Energy
Office: [phone]
Cell: [phone]
[e-mail]
f� E° i�RCY
-----Original Message -----
From: Bailey, David E CIV USARMY CESAW (US)[mailto:[e-mail]]
Sent: Friday, June 23, 2017 11:42 AM
To: Dishmon, Joyce Martin; Homewood, Sue; Leonard, Shannon; Gantt, Matt
1

Cc: Newcomb, Dana H; Todd, Shannon; Pifer, Anne H.; Cahoon, Steve; Kirchner, Chuck
Subject: RE: Sediment Loss (UNCLASSIFIED)
*** Exercise caution. This is an EXTERNAL email. DO NOT open attachments or click links from unknown senders or unexpected
email. ***
CLASSIFICATION: UNCLASSIFIED
Hi Joyce, and thank you for your email notification. Generally speaking, clean-up of sediment and erosion control -related releases
into waters of the US including streams and wetlands would be under the purview of the NC Division of Water Resources. In
circumstances where these sediment and erosion control releases are associated with projects permitted by the Corps, we would
generally expect the following:
All sediment, 57 -stone, etc. should be removed from jurisdictional areas and relocated to (and stabilized in) uplands. Care should
be taken not to over excavate in the cases of wetlands/riparian area and err on the side of caution (i.e. leaving a skim layer of less
than %" is preferable to removing the top layer of soil in these areas). Appropriate seed mixes should be cast over these areas (i.e.
riparian mix for areas adjacent to streams, wetland mix in wetland areas - rather than the typical seed mixes intended for use in
the upland areas/shoulder/slope stabilization). Then a layer of straw mulch should be scattered to insure the seed remains in
place. In the case of stream clean up, hay bales (if appropriate for stream size) should be used at 30 to 50 ft intervals within the
stream and the crew should work their way downstream. The hay bales will catch any sediment that gets disturbed during the
cleanup. Again, care should be taken not to OVER excavate within the stream channel. In the case of areas where the channel is
too wide or too deep, we recommend the use of turbidity curtains OR sheet piling and pumping down the area to remove the
sediment (as appropriate). All removed material should be removed to an upland area.
Please make sure that all devices are repaired and functional per S&EC agency requirements.
Please also send pictures during and post cleanup efforts to all relevant parties/agencies.
Let me know if you have any questions.
-Dave Bailey
David E. Bailey, PWS
Regulatory Project Manager
US Army Corps of Engineers
CE -SAW -RG -R
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Phone: [phone], Ext. 30.
Fax: [phone]
Email: [e-mail]
We would appreciate your feedback on how we are performing our duties. Our automated Customer Service Survey is located at:
http://corpsmapu.usace.army.mil/cm apex/f?p=136:4:0
Thank you for taking the time to visit this site and complete the survey.
-----Original Message -----
From: Dishmon, Joyce Martin [mailto:[e-mail]]
Sent: Friday, June 16, 2017 3:19 PM
To: Bailey, David E CIV USARMY CESAW (US) <David. E. [e-mail]>; Homewood, Sue <[e-mail]>;
Leonard, Shannon <[e-mail]>; Gantt, Matt <[e-mail]>

Cc: Newcomb, Dana H <[e-mail]>; Todd, Shannon <[e-mail]>; Pifer, Anne H.
<[e-mail]>; Cahoon, Steve <[e-mail]>; Kirchner, Chuck
<[e-mail]>
Subject: [Non-DoD Source] Sediment Loss
Shannon,
Per my voicemail, I am sending a follow up email outlining the sediment loss to an intermittent stream due to storm event, the
BMP measures in place, and the additional measures installed. During inspection of E&SC measures after a 0.81" rain event which
occurred within one hour, Dana Newcomb discovered sediment loss from the E&SC measures behind the Warehouse (ROCKI-
2014-008 Addendum (Final Grading - Approved 5/3/2017). I have attached photos for your review.
The BMPs installed included silt fence and rock check dam as per the approved E&SC plan to prevent sediment loss during
installation of the sediment basin. The rain event caused enough velocity that the sediment undermined the check dam and
entered the downstream intermittent stream. The intermittent stream flows to a perineal stream. The sediment appears to have
settled along the intermittent stream with a small amount of sediment at the perineal stream edge (photos Sed -1, Sed -2 & Sed -
3). The length of the intermittent stream was estimated to be 0.1 mile in length with an average of 0.5" of sediment
deposited. Duke Energy estimates the volume of sediment loss at 1.5 cubic yards.
Corrective measures include installation of fabric behind the refreshed 57 stone to help prevent undermining of the rock check in
the future. Additional rock checks with larger riprap, fabric, and 57 stone have been installed. Areas have been dugout deeper to
create stilling basins prior to the rock checks. Additional energy dissipaters have been installed around the perimeter of the basin
structure to collect sediment until the basin construction can be completed. Duke Energy requests direction on cleanup measures
needed for the intermittent stream sediment.
Thank you for your consideration. Please let me know if you need additional information.
David,
I am copying you on the email as a notification of the sediment loss incident.

Joyce Dishmon
Sr. Environmental Specialists I EHS CCP Permitting and Compliance
864 South Edgewood Road I Eden, NC 27288
[e-mail] <mailto:[e-mail]>
Cell: 336-394-5524
Office: 336-623-0238
CLASSIFICATION: UNCLASSIFIED

4S NERGY.

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