20100991 Ver 1_Full Size Plan Sheets_20110125

FW: WT Harris/The Plaza Intersection Page 1 of 2�i o f C
FW: WT Harris/The Plaza Intersection
Lespinasse, Polly
Sent: Tuesday, January 25, 20117:51 AM
To: Carrillo, Sonia
Attachments: 087602-RIPRAP.PDF (81 KB)
Sonia,
I put this project on hold (DWQ #10-0991— Mecklenburg County). He sent this response back electronically.
Does he need to send the response back in hard copy form to your office with the appropriate number of
copies? FYI —We are still discussing these responses, so they are not final.
Also, I got a voicemail from Michael Gloden with PBSJ about the Monroe Turnpike files (haven't returned the call
yet). Have you spoken with him recently? He was asking if SELC needed the preliminary data forms from 2008.
Their opinion is that SELC doesn't need them. I think if SELC has asked to see "everything', then these
preliminary data forms should be made available too. If you are having any difficulty getting files, let me know
and I will contact Michael. Thanks for all your help on this!
From: [e-mail] [mailto:[e-mail]]
Sent: Monday, January 17, 20113:44 PM
To: Lespinasse, Polly
Cc: [e-mail]
Subject: RE: WT Harris/The Plaza Intersection
Hello Polly,
I hope you had a great holiday! I apologize for the lag in response time but I appreciate you taking a look at the
site for us. I have some answers to a number of concerns you expressed regarding the project:
• How will the riprap be keyed into the bank so that it won't move downstream during storm events?
The riprap will be keyed into the bank according to NCDOTStondord 876.02 — Guide for Rip Rap at Pipe
Outlets. See attached PDF.
• Will you have to do any work to stabilize the slope on the right bank (if looking downstream)? This
existing slope appears to be nearly 1:1 with a few smaller dbh trees.
The disturbed side slope will be stabilized by the riprap apron at the pipe outlet according to NCDOT
Standard 876.02. The side slope will be gently graded to 1.5:1 or flatter and covered with filter fabric
and riprap.
• Will the riprap be installed such that it is below the existing streambed elevation so that low flow of
water and aquatic life passage won't be impeded?
The riprap will be installed below the existing streambed elevation according to NCDOTStondord 876.02
— Guide for Rip Rap at Pipe Outlets. See attached PDF.
• Additionally, please provide the size of riprap proposed for the dissipator pad.
The riprap is proposed to be Class B (diameter between 5"-15").
You are correct in assuming that the culvert burial is not an issue since we are installing a junction box. If you
have any more questions or concerns regarding the project please do not hesitate to contact me.
Thank you,
https://mail.nc.gov/owa/?ae=Item&t=IPM.Note&id= :gAAAADMSzLcd9W2TJHI4%2bm... 1/27/2011

FW: WT Harris/The Plaza Intersection
Chris Tinklenberg, WPIT
Kimley-1-lora and Associates, Inc.
dir [phone]
fax [phone]
chris.tinklenber ue ki,nlev-horn.conl
From: Lespinasse, Polly [mailto:[e-mail]]
Sent: Wednesday, December 22, 2010 11:57 AM
To: Tinklenberg, Chris
Cc: Chapin, Stephen SAW
Subject: WT Harris/The Plaza Intersection
Hi Chris,
Page 2 of 2
I am reviewing the 401 application for this project and have a couple of questions. I went out to the site on
Monday and it appears that the stream is pretty close to the parking area for the apartment complex. The
application indicates that 23 linear feet of riprap (apron) will be installed at the end of the culvert for energy
dissipation. How will the riprap be keyed into the bank so that it won't move downstream during storm events?
Will you have to do any work to stabilize the slope on the right bank (if looking downstream)? This existing
slope appears to be nearly 1:1 with a few smaller dbh trees. Will the riprap be installed such that it is below the
existing streambed elevation so that low flow of water and aquatic life passage won't be impeded? Additionally,
please provide the size of riprap proposed for the dissipator pad. I am assuming that culvert burial is not an
issue since you are installing a junction box.
If you have any questions or need to discuss the project, please feel free to e-mail or call me.
Thanks for your help.
Polly Lespinasse - Polly. [e-mail]
Environmental Specialist
North Carolina Dept. of Environment & Natural Resources
Div. of Water Quality
610 E. Center Ave., Suite 301
Mooresville, NC 28115
Ph: 704.663.1699 Fax: [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and
may be disclosed to third parties.
https://mail.ne.gov/owa/?ae=Item&t=IPM.Note&id=RgAAA ADMSzLcd9W2TJHI4%2bm... 1/27/2011

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