R-3300B Hampstead Bypass sediment losses

From:Westphal, Anneliese
To:Sprinkle, Hannah H; Steffens, Thomas A CIV USARMY CESAW (USA); Lane, Stephen
Cc:Giles, Jon W; Steenhuis (LJB, Inc.), Joanne H
Subject:R-3300B Hampstead Bypass sediment losses
Date:Friday, September 1, 2023 2:11:07 PM
Attachments:image001.png1 _ Idalia _ SR6 Pipe Outlet.jpg2 _ Idalia _ SR6 Sediment in Pond.jpg3 _ Idalia _ Culvert 13 Inlet Wing Wall Wash.jpg4 _ Idalia _ Culvert 13 Inlet Wing Wall Sediment in CF Mat.jpg5 _ Idalia _ Culvert 13 Inlet Wing Wall Sediment in CF Mat.jpg
Hannah, Stephen, and Tom,
Ben Meyer has reported the following losses at 2 areas on the subject project from the Idalia rain
event. Please see the attached photos. He reported that the rain gauge at the office was
overtopped (>5”) and from the MPE website the project received over 5” of rain in 24 hours.

Area 1
Y30 STA 22+40 LT less than 2cy of material from 36” crossline pipe. The pond is at the corner of SR6
and Y30 (NC210). The sediment deposited in the pond is from the outlet of the pipe (photos 1 and
2).
Area 2
Culvert 13 inlet
L1 STA 712+50 RT approximately 1cy of material (photos 3,4, and 5)

We will update you if there are other areas reported.
Thank you,
Anneliese

Anneliese Westphal
Environmental Senior Specialist
Division 3
NCDOT- Division of Highways

910 341 2000 office
910 604 1330 mobile
910 675 0143 fax
[e-mail]

5501 Barbados Blvd
Castle Hayne, NC 28429-5647

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