20120412 Ver 3_Modifications_20171016

1r Charta[ta-Mecklenburg
STORM
WATER
Services
600 E. Fourth Street
Charlotte, NC 28202
VV Fax [phone]
October 5, 2017
Ms. Crystal Amschler
U.S. Army Corps En � of Engineers
151 Patton Avenue, Room 208
Asheville, North Carolina 28801
Subject: Wiseman Capital Improvement Project (CIP) permit modification
(SAW #: 2012-0669/ DWR #: 12-0412)
Dear Ms. Amschler,
I am hereby requesting a modification to the approved 401/404 permits for the Wiseman CIP,
originally authorized by the USACE on July 27, 2012 (DWR on May 1, 2012) and re -authorized by
the USACE on August 30, 2016 (DWR on August 19, 2016). All project impacts were constructed in
accordance with the approved construction plans, with the exception of impact area S3 (as denoted in
the Pre -Construction notification package).
Impact S3 was originally proposed as a rock sill and riffle grade control on the upstream side of a
pipe replacement. Upon excavation for installation of these features, it was discovered that there was
shallow bedrock present in the stream channel. As a result of this discovery, it was determined that
the rock sill would be difficult to try and install properly on top of bedrock. The constructed riffle was
installed between the bedrock and the culvert invert. Over the course of several weeks, multiple large
flow events scoured out the riffle material each time it was re -installed. The engineer determined that
some larger material would need to be installed such that the stream could not scour out around the
inlet of the culvert. The engineer determined that class 1 rip rap would be the appropriate measure. A
25 linear foot rip rap apron was installed in this location. The voids in the rip rap were filled in and
water was flowing over the rock. After several storm events, this area remains stable.
The installation of rip rap in an area that was previously permitted as a temporary impact increases
the total permanent (loss) impacts of the project to 165 linear feet; we are requesting a permit
modification to account for this change. As this change was the result of unforeseen circumstances
and is justified to maintain the stability of the stream channel, we are requesting that mitigation be
required for this impact only; resulting in the purchase of 25 SMUs from the City's Umbrella Stream
and Wetland Mitigation Bank (Robinhood-Dooley Stream Restoration Project).
Enclosed you will find an updated impacts summary table, a marked up construction plan sheet for
the impact area described above and photos of the area (before and after repair/revised impact). If you
have any questions or concerns regarding this project, feel free to contact me at [phone], or
erin.shanaberger(a,charlottenc.gov to discuss in more detail.
•
A'Y1w To report pollution or drainage problems, call: 311 a�
http://stormwater.charmeck.org

Sincerely,
c;.mroa.a7.v, Digitally signed by Erin
,.
WATER Shanaberger
YijiTER Date: 2017.10.05 15:50:42
=sem.ee-z=1'=: -04'00'
Erin Shanaberger
Water Quality Program Specialist
City of Charlotte, Storm Water Services
cc: Alan Johnson, NCDWR
Table 1. Stream impacts associated with the Wiseman CIP.
Photos 1-2. Impact area S3 after a storm event; constructed riffle was scoured out.
Wiseman CIP Revised Impacts mary
Stream
Impact #
Stream Name
Originally
Impact
Type
Revised Impact
Type
Original Impact
Length
Revised Impact
Length
SI
Reach 7
Temporary
Temporary
85
85
S2
Reach 6
Permanent
Permanent
140
140
S3
Reach 5
Temporary
Permanent
20
25
S4
Reach 4
Temporary
Temporary
80
80
S5
Reach 5
Temporary
Temporary
378
378
S6
Reach 4
Temporary
Temporary
278
278
S7
Reach 3
Temporary
Temporary
55
55
Photos 1-2. Impact area S3 after a storm event; constructed riffle was scoured out.

Charlotte -Mecklenburg
TCR
-,,WATER
Services "
600 E. Fourth Street
Charlotte, NC 28202
Fax [phone]
Photo 3. Impact area S3 immediately after rip rap installation. Rip rap was keyed in and flush with
the channel bottom.
(6 •
To report pollution or drainage problems, call: 311
�/� http://stormwater.charmeck.org

Photo 4. Impact area S3 after a storm event and rip rap apron installation remains stable.

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Montalvp, Sheri A
From: Johnson, Alan
Sent: Monday, October 16, 2017 3:51 PM
To: Montalvo, Sheri A
Subject: FW: [External] FW: Wiseman
Attachments: 2017-10-05 Wiseman permit mod.pdf, Red lined Plan sheet 5.pdf
Can you handle as a modification? DWR 12-0412.
Not sure what version. Just let me know when you have added to bims and the new
version. Then I will issue from here. Procedural thing.
-----Original Message -----
From: Shanaberger, Erin [ma iIto: Erin. [e-mail]. nc. us]
Sent: Friday, October 13, 2017 7:06 AM
To: Johnson, Alan <[e-mail]>
Subject: RE: [External] FW: Wiseman
CAUTION: This email originated from outside of the organization. Do not click links or
open attachments unless you verify that the attachment and content are safe. Send all
suspicious email as an attachment to [e-mail].
Alan,
Must be something about sending a ZIP file. Hopefully this one comes through.
Thanks,
Erin
-----Original Message -----
From: Johnson, Alan [mailto:[e-mail]]
Sent: Thursday, October 12, 2017 4:06 PM
To: Shanaberger, Erin
Subject: RE: [External] FW: Wiseman
Ok, it doesn't recognize the file...
Send as something else.
thanks
-----Original Message-----

From: Shanaberger, Erin [mailto: Erin. [e-mail]. us]
Sent: Thursday, October 12, 2017 2:45 PM
To: Johnson, Alan <[e-mail]>
Cc: Amschler, Crystal C SAW <[e-mail]. mil>
Subject: RE: [External] FW: Wiseman
CAUTION: This email originated from outside of the organization. Do not click links or
open attachments unless you verify that the attachment and content are safe. Send all
suspicious email as an attachment to [e-mail].
-----Original Message -----
From: Johnson, Alan[mailto:[e-mail]]
Sent: Thursday, October 12, 2017 2:44 PM
To: Shanaberger, Erin
Subject: RE: [External] FW: Wiseman
Nothing was attached.
-----Original Message -----
From: Shanaberger, Erin [mailto: Erin. [e-mail]. nc. us]
Sent: Thursday, October 12, 2017 9:27 AM
To: Johnson, Alan <[e-mail]>
Cc: Amschler, Crystal C SAW <[e-mail]. mil>
Subject: RE: [External] FW: Wiseman
CAUTION: This email originated from outside of the organization. Do not click links or
open attachments unless you verify that the attachment and content are safe. Send all
suspicious email as an attachment to [e-mail].
Alan,
See attached.
Thanks,
Erin
-----Original Message -----
From: Johnson, Alan [mailto:[e-mail]]
Sent: Thursday, October 05, 2017 2:30 PM
To: Shanaberger, Erin
Subject: RE: [External] FW: Wiseman
z

Sounds good. As long as the stream is stable.
Email me an "additional information" letter/diagram. Showing what was and what is
can then just copy to the data file for future reference
Include the DWR#
-----Original Message -----
From: Shanaberger, Erin [mai Ito: [e-mail]]
Sent: Thursday, October 05, 2017 7:56 AM
To: Amschler, Crystal C SAW <[e-mail]. miI>; Johnson, Alan
<alan. [e-mail]>
Subject: [External] FW: Wiseman
CAUTION: This email originated from outside of the organization. Do not click links or
open attachments unless you verify that the attachment and content are safe. Send all
suspicious email as an attachment to [e-mail].
0
Just to follow up on this email, The remainder of the project was inspected yesterday
and everything looks good from a compliance point of view. Let me know what
documents you would like me to submit to address the change below. I know Crystal
will likely have to issue a modification because of the mitigation.
Thanks,
Erin
Erin Shanaberger
Water Quality Program Specialist
City of Charlotte I Engineering & Property Management I Storm Water Services
mobile: [phone] [e-mail]
-----Original Message -----
From: Shanaberger, Erin
Sent: Friday, September 15, 2017 9:57 AM
To: 'Amschler, Crystal C CIV USARMY CESAW (US)'
Cc: Alan Johnson ([e-mail]); Simonson, Helen
Subject: RE: Wiseman
Crystal,
C

The final resolution they implemented was a change in the constructed riffle/rock sill
combo to a rip rap apron and then live stakes on the bank upstream. Since there was
bedrock where the rock sill was supposed to be installed, they originally decided to
leave out the sill. The result was a scour hole developing at the inlet because the riffle
grade control wasn't holding (see attached photos 0184, 0186). Rip rap was installed in
lieu of the riffle below the bedrock to the inlet (see attached photos 1116, 0843) and
seems to be holding up. This results in a permanent loss impact of 25 linear feet as
opposed to a temporary impact of 25 feet to install the riffle and sill. The re -
authorizations you and Alan issued last year for the project were for 140LF of
permanent loss impacts. Looks like we will now owe 15 feet of mitigation, or 30 SMUs.
If you concur with this assessment, please reply and I will submit the required
documentation.
Thanks,
Erin Shanaberger
Water Quality Program Specialist
City of Charlotte I Engineering & Property Management I Storm Water Services
mobile: [phone] [e-mail]
-----Original Message -----
From: Amschler, Crystal C CIV USARMY CESAW (US)
[mai Ito: Crystal. [e-mail]. mil]
Sent: Thursday, September 14, 2017 3:34 PM
To: Shanaberger, Erin
Subject: RE: Wiseman
Ok. just wanted to make sure it didn't fall of the radar.
Crystal C. Amschler
Project Manager
Asheville Regulatory Field Office
151 Patton Avenue, Room 208
Asheville, NC 28403
(828)-271-7980 Ext 4231
The Wilmington District is committed to providing the highest level of support to the
public. To help us ensure we continue to do so, please complete the Customer
Satisfaction Survey located at:
http://corpsmapu. usace. army. mil/cm_apex/f?p= 136:4: 0
-----Original Message -----
4

From: Shanaberger, Erin [mailto: Erin. [e-mail]. nc. us]
Sent: Thursday, September 14, 2017 2:55 PM
To: Amschler, Crystal C CIV USARMY CESAW (US)
<[e-mail]. mil>
Subject: [EXTERNAL] RE: Wiseman
Crystal,
I have asked both the project manager and construction supervisor to follow up with
me and am waiting for a response.
Thanks,
Erin
-----Original Message -----
From: Amschler, Crystal C CIV USARMY CESAW (US)
[mai Ito: Crystal. C.Amschler@usace. army. mi l]
Sent: Thursday, September 14, 2017 2:54 PM
To: Simonson, Helen; Shanaberger, Erin
Cc: Johnson, Alan; Keene, John
Subject: RE: Wiseman
Just wanted to follow up on the below email and find out if you guys ever got
clarification on this project?
Crystal C. Amschler
Project Manager
Asheville Regulatory Field Office
151 Patton Avenue, Room 208
Asheville, NC 28403
(828)-271-7980 Ext 4231
The Wilmington District is committed to providing the highest level of support to the
public. To help us ensure we continue to do so, please complete the Customer
Satisfaction Survey located at:
Blockedhttp://corpsmapu.usace.army.mil/cm_apex/f?p=136:4:0
-----Original Message -----
From: Simonson, Helen [mai Ito: Helen. [e-mail]. nc. us]
Sent: Tuesday, September 05, 2017 8:11 AM
To: Shanaberger, Erin < Erin. [e-mail]. nc. us>; Amschler, Crystal C
CIV USARMY CESAW (US) <Crystal.C.Amschler@usace. army. mi I>
E

Cc: Johnson, Alan <[e-mail]>; Keene, John
<[e-mail]. nc. us>
Subject: [EXTERNAL] RE: Wiseman
Erin,
The email attachment Crystal sent didn't come through on my end. Following the
information provided here though, this portion of the project was long last completed
before I came on board. I was involved with reducing the impacts downstream on
page 10 from 45 to 35LF at the riffle. I would check with John Keene, as the project
manager he would have more information regarding this specific location. The project
is almost completed, final paving is being done now. We can stop by there and take
photos/ check on location this Thursday if necessary. Sorry I don't know more about
this project.
Helen.
-----Original Message -----
From: Shanaberger, Erin
Sent: Tuesday, September 05, 2017 7:25 AM
To: Amschler, Crystal C CIV USARMY CESAW (US)
Cc: Johnson, Alan; Simonson, Helen
Subject: RE: Wiseman
Crystal,
The design engineer and the City project team were going back and forth for some
time about exactly how to address the issue in this location. I believe discussions were
still ongoing earlier this year, around the time when Helen got involved with this project;
so I am unsure exactly where they landed as an appropriate solution. I checked the
redlined plans for this area, and didn't see any additional impacts. I have copied Helen
on this email to provide additional feedback on any additional impacts that may have
occurred at this location.
Helen, the area in question is immediately upstream of the culvert inlet on plan sheet 5.
Back in October, the design consultant was proposing a rock toe; however, I know
earlier this year, they still had not settled on this solution, and were reconsidering
alternatives (or whether or not to do any additional work at all). Do you know if there
have been any plan changes in this location?
Thanks,
Erin
6

Erin T. Shanaberger
Water Quality Program Specialist
City of Charlotte I Engineering & Property Management I Storm Water Services
mobile: [phone] [e-mail]
-----Original Message -----
From: Amschler, Crystal C CIV USARMY CESAW (US)
[mailto:[e-mail]]
Sent: Friday, September 01, 2017 12:38 PM
To: Shanaberger, Erin
Cc: Johnson, Alan
Subject: Wiseman
Hey Erin,
Just wanted to follow up on Wiseman. The attached email is the last correspondence I
have on it.
Crystal C. Amschler
Project Manager
Asheville Regulatory Field Office
151 Patton Avenue, Room 208
Asheville, NC 28403
(828)-271-7980 Ext 4231
The Wilmington District is committed to providing the highest level of support to the
public. To help us ensure we continue to do so, please complete the Customer
Satisfaction Survey located at:
BIockedBlocked http://corpsmapu. usace. army. mil/cm_apex/f?p=136:4:0