20160672 Ver 1_Br 126 in Orange Co_20160722

Wrenn, Brian L
From:Bailey, David E SAW <[e-mail]>
Sent:Friday, July 22, 2016 7:51 AM
To:Wrenn, Brian L; Nicole Thomson
Subject:RE: Br. 126 in Orange Co.
Brian and Nikki,

I haven't reviewed the application yet, but if the project involves replacing a bridge with a 4-sided culvert then we would
typically require compensatory mitigation of stream impacts at a 2:1 ratio. If it's proposed as a bottomless culvert with
natural channel bottom but "low-flow shaping" bench construction, we would typically require compensatory mitigation
of stream impacts at 1:1. We typically won't require compensatory mitigation for bank stabilization if the rip rap is only
on the banks. Hope this helps!

-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
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Email: [e-mail]

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-----Original Message-----
From: Wrenn, Brian L \[mailto:[e-mail]\]
Sent: Thursday, July 21, 2016 9:46 AM
To: Nicole Thomson <[e-mail]>
Cc: Bailey, David E SAW <[e-mail]>
Subject: \[EXTERNAL\] Br. 126 in Orange Co.

Nikki,

Based on the application, it appears that there will be 105 lf of impact for the culvert and an additional 58 lf for bank
stabilization and flood plain bench construction with total permanent impacts equaling 163 lf. DWR will require
mitigation for the 163 lf at 1:1. Because it appears that DMS is supplying mitigation for 105 lf at 2:1 for the Corps, this
should be plenty of mitigation. I just wanted you to be aware before I issue the 401. I've copied David on this to verify
that 2:1 mitigation will be required for the stream impacts. If not, we'll need a new letter from DMS detailing
acceptance of mitigation for 163 lf of impact. Thanks and let me know if you have any questions.

1

Brian L. Wrenn

Transportation Permitting Unit

Division of Water Resources

919-707-8792

[e-mail]

2