ST0301A-CS100916 (2)
(8/9/2011) Keith Marvin - Fwd: Aerial Crossing Alternate AlignmentPage 1
From: Keith Marvin
To:Thornhill, Caleb
CC:vbk@freese.com
Date: 9/16/2010 10:07 AM
Subject: Fwd: Aerial Crossing Alternate Alignment
Attachments:ST03-01SS PLANS ALT.pdf; 5160.pdf
Caleb,
Attached is the plan sheet and our standard detail for the aerial crossing. The plan sheet is a little cluttered, but the pier
placed at STA 1+82.16 was placed out of alignment. What we are trying to do is build the pier offset so that it can support
the pipe in a cantilever fashion. We've drawn a line where we would like the sewer to go, and it is 1.51 feet south of the
pier location (measured center of pier to center of proposed pipe).
We will be supporting a 20" steel casing pipe containing a 12" PVC sewer line. The drilled shaft is 30" in diameter, and it
was drilled 15 feet below natural ground, a minimum of 6' into shale. The reinforcing in the pier should be the same as
was installed in the bridge piers. Can you and Peter look at this and give me a design for this column and pier cap.
Please call me with any questions.
Thanks,
Keith
Keith Marvin, P.E.
Project Engineer
(972) 304-3681
>>> Scott Latta 9/16/2010 9:47 AM >>>
Attached.
ST03-01SS
CITY OF COPPELL
1