20140847 Ver 1_DOT e-mail hold follow-up_20141002

Ward, Garcy
From:Willis, Thomas C
Sent:Thursday, October 02, 2014 8:19 AM
To:Ward, Garcy
Subject:FW: Dare #16 - BR270016 Drainage Elevations

Garcy,
I asked about them moving the drop inlet box up in elevation to see if that was possible, which may help with
daylighting the pipe on the eastern side. They said the box was set at the minimum required and provided the numbers

below. Basically, the box is already set as high as it can be allowed, based on requirements for cover and drainage.

Clay

From: Boyer, Jason \[mailto:[e-mail]\]
Sent: Monday, September 29, 2014 5:15 PM
To: Willis, Thomas C

Subject: Dare #16 - BR270016 Drainage Elevations

Clay,

I looked at the pipe elevations based on our conversation on Friday. I did a quick calc that shows the invert was
set to the minimum +/- an inch.

5.78 (Top of Road Elevation at gutter) - 2ft cover (required) - 0.2083 ft (pipe wall thickness) - 1.5 ft (18" I.D.)
= 2.07 (approx invert elevation)

The plans currently have the first inlet invert set at 1.95" (only 0.12 ft below what my rough calc shows). My
number may be off slightly depending on if there is any additional drop that needs to be accounted for with the
grate.

If there are any questions please let me know. Thanks.

Jason A. Boyer, P.E. | Structural Engineer

Gannett Fleming, Inc.

c 814.558.1227 | [e-mail]
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