ST9905-CS050801! Suzan Ta~lor - FW: Bethel Road Box Culverts Page 1 1
From:
To:
Date:
Subject:
<ccbond@transystems.com>
<staylor@ci.coppell.tx.us>
8/1/2005 2:15:43 PM
FW: Bethel Road Box Culverts
Susan,
Attached is the proposed pipe penetration detail I sent to Mike Brown,
our structural engineer, but I haven't received any comments back yet.
Craig
From: DL-Charles Bond
Sent: Monday, August 01, 2005 2:03 PM
To: FVV-Michael Brown
Cc: FW-Mike Hobbs
Subject: Bethel Road Box Culverts
Mike Brown - Can you please take a look at the attached box culvert
penetration sketch and let me know what you think. There is a 12" sewer
line going under the box culverts at Bethel Road. We can't lower the
sewer line so I'm proposing to encase the 12" PVC sewer line in an 18"
cast iron pipe sleeve and add an 8" lap splice concrete slab (not sure
of my nomenclature) below the pipe sleeve penetration. The cast iron
pipe penetration would go through a set of 4 multiple box culverts (see
attached plan view for reference). I also looked at lowering the box
culvert so the penetration could go through the box culvert walls
instead, but the resulting down stream slope and COE permit requirements
make this a poor option.
Mike Hobbs - Since we can't lower the sewer line, I'm proposing to raise
the box culvert flow line by 0.68 ft from 500.65 (ELMIN from your HEC
run) to 501.33 If the rise in the CWSEL is proportional (as it
appeared to be in earlier HEC runs), the CWSEL for the 4-5'x10' box
culverts would increase from 508.74 to 509.42 F & N's roadway
elevation is 509.02 (top of curb at 509.52), so we may need to bump up
the boxes to 4-6'x10' to reduce the CWSEL. The resulting increase in box
size would put the top of the 4-6'x10' box culverts at 508. I spoke with
Sam Meisner at F & N this morning and he is sending me their latest plan
and profile so I can verify their roadway elevations.
~ Suzan Taylor - FW: Bethel Road Box Culverts Page 2']
Craig Bond, P.E.
TranSystems Corporation Consultants
3010 LBJ Freeway, Suite 990
Dallas, Texas 75234
Ph 972-280-9300 x 225
Fax 972-280-9715
Cell 817-296-8536
ccbond@transystems.com
EXTEND 28 L
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