RE_ Commerce Drive (U-5878) Loss Update

From:Sprinkle, Hannah H
To:Farrell, Sean C; Shaver, Brad E CIV USARMY CESAW (US)
Cc:Steffens, Thomas A CIV USARMY CESAW (USA)
Subject:RE: Commerce Drive (U-5878) Loss Update
Date:Friday, October 28, 2022 8:17:00 AM
Attachments:image001.png
Sean,

The site is looking a lot better, definitely an improvement. I’d like to see them get their meter
working for future issues. I know you sent then some calibration instructions so hopefully they can
get it fixed.

Thanks for the update,

Hannah

From: Farrell, Sean C <[e-mail]>
Sent: Friday, October 28, 2022 7:48 AM
To: Sprinkle, Hannah H <[e-mail]>; Shaver, Brad E CIV USARMY CESAW (US)
<[e-mail]>
Cc: Steffens, Thomas A CIV USARMY CESAW (USA) <[e-mail]>
Subject: FW: Commerce Drive (U-5878) Loss Update

Hannah and Brad,

Please see below report from Sophia’s follow up inspection at U-5878 yesterday. I don’t think they
ever did get their turbidity meter working, but is sounds like things have cleared up considerably.

Sean Farrell
Division Environmental Officer
Division 3
NCDOT- Division of Highways

910-341-2033 office
910-599-1184 mobile
[e-mail]

5501 Barbados Blvd
Castle Hayne, NC 28429

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

From: Gingrich, Sophia E <[e-mail]>
Sent: Thursday, October 27, 2022 7:39 PM
To: Farrell, Sean C <[e-mail]>
Cc: Westphal, Anneliese <[e-mail]>; Dustin, Christopher <[e-mail]>
Subject: Commerce Drive (U-5878) Loss Update

Sean,

The attached photos are from my visit to Commerce Drive today to check in on their turbid
release problem from Tuesday 10/25. They were no longer pumping water out of the culvert
area today. They had the bottom of the wing wall and culvert poured. The additional erosion
control devices they added on Tuesday significantly helped with the turbidity problem. You
can see their new set up in the "silt bag" picture. In addition to the extra wattles, they also put
a floc bloc (I hope I spelled that right) inside the silt bag. The water coming out of the silt bag
as well as the standing water still in the wetlands was clear; the sediment had settled out. One
of the contractors showed me a video of the water coming out of the silt bag while they were
pumping, and it looked clear then too. If you would like to see the video, we could probably
get it from Kelly or Mike. The water was also not flowing into the stream anymore. Upstream
of the original entry point still looked a little turbid, though not nearly as turbid as before. This
may be due to the slow flow/back up of the water I mentioned in my last email. Downstream,
where there was more flow, looked clear. Unfortunately, I cannot find the picture I took of the
actual stream, but parts of it can be seen in photos 3517 on the right and 3518 in the bottom
left.

There was still a fine layer of the sediment where the turbid water had been running through
the wetlands originally. Kelly plans on having them go in there with rakes and shovels to try to
scrape some of it up. The layer of sediment throughout the wetlands was a couple millimeters
at its thickest. I told him they have to be careful not to over-excavate and to give us a call if
they have any questions.

Let me know if you have any questions!
Thanks,

Sophia Gingrich
Environmental Technician
Division 3
NCDOT – Division of Highways

Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.