20161109 Ver 1_Alleghany Pipe #2032_20161216

Wanucha, Dave
From:Slaughter, Johnathan H
Sent:Friday, December 16, 2016 8:23 AM
To:Chambers, Marla J; Wanucha, Dave; Kichefski, Steven L SAW
Subject:Alleghany Pipe #2032
Attachments:SF220032_GEO_CULV0032_INVESTIGATION.pdf; 02 2032 2016 SF-022032 PRATHERS CREEK NC 113.PDF; DSCN0557.JPG; DSCN0560.JPG
Marla,

See below for clarification.

The proposed structure is not bottomless but with the flat grade we expect to be in good shape. Bridging the stream would mean closing NC 113 for an extended period of time and we are
trying to avoid that.

From: Tina Swiezy \[mailto:[e-mail]\]
Sent: Thursday, December 15, 2016 4:33 PM
To: Slaughter, Johnathan H <[e-mail]>
Cc: Guynn, Jami C <[e-mail]>; Jonathan Whittington <[e-mail]>; Eleni Riggs <[e-mail]>
Subject: Div 11OC 2032 existing bottomless question

Heath

Existing Culvert 2032 is an arch on concrete footings(no bottom).

Just to recap the project history:
This needs to be built quickly in the Summer because of construction limitations so cast in place is not an option.
Original CSR from Hydro 2014 had a Steel Plate Arch.
Scoping requested a precast RCBC however the span needs to be approximately 18’ to match the stream which is wider than the typical width for RCBCs.
Therefore we ended up with an arch similar to the DOT design that matches the stream width and is buried.

The stream slope is very flat in the stream and I believe the natural bed backfill will be very stable.

Let me know if you have further questions.

Thanks

From: Jeremy Hamm \[mailto:[e-mail]\]
Sent: Thursday, December 15, 2016 2:46 PM
To: Jonathan Whittington <[e-mail]>
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Cc: Tina Swiezy <[e-mail]>
Subject: RE: Division 11 On-Call Bridge #244

Jonathan,

Thanks for calling, attached is the investigation report for Culvert 32. Let me know if you have any questions about the information contained in this report.

Thanks,
JEREMY R HAMM, PE
GEOTECHNICAL SERVICES MANAGER

FALCON ENGINEERING

919-302-9758

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