FW: West Sandy Lake RdBridge W. Wing Wall Bust in Construction ElevationKeith,
Please note the summary below of our review of the as-built conditions
of the wing wall at the Sandy Lake Road Bridge.
Feel free to let us know if you have any additional questions.
Chris
Chris Schmitt, P.E.
Principal
17304 Preston Road, Suite 1340
Dallas, Texas 75252
214.461.9867 Main
214.988.9913 Direct
903.421.1897 Mobile
214.461.9864 Fax
cschmitt@tnpinc.com <mailto:cschmitt@tnpinc.com>
From: Keith Burkholder
Sent: Monday, August 25, 2014 5:53 PM
To: Chris Schmitt
Cc: Delvin Black
Subject: FW: West Sandy Lake RdBridge W. Wing Wall Bust in Construction
Elevation
Chris, see below synapsis from Delvin’s review of the survey data and I
agree with his evaluation.
Keith Burkholder, P.E.
Senior Structural Engineer
1100 Macon Street
Fort Worth, Texas 76102
817.336.5773 Main
817.665.7177 Direct
214.675.1704 Mobile
817.336.2813 Fax
KBurkholder@tnpinc.com <mailto:KBurkholder@tnpinc.com>
From: Delvin Black
Sent: Monday, August 25, 2014 4:18 PM
To: Keith Burkholder
Subject: West Sandy Lake Rd
Keith
Following is my analysis of the bridge wing wall elevation problem.
TNP’s survey department checked the elevations at the northwest corner
of the West Sandy Lake Road bridge over Cottonwood Creek.
As
Constructed
Elevation Elevation
Difference of Elevation
Per the
recent Per the Plans of
Constructed Elements
survey
Versus the plans
Top of end of wing wall 486.35
486.430 0.08’ low
Top of wing wall at abutment 486.44
486.536 0.096’ low
Top of sidewalk at abutment 486.58
486.536 0.044’ high
The combination of the top of the wing wall at the abutment being
constructed 0.096’ low and the sidewalk being 0.044’ high amounting to a
total difference of 0.140’ or 1.68 inches for practical purposes is the
1.75 inches that we were observing in the field that the top of the wing
wall was below the planned top of sidewalk.
Based on the results of this survey, the contractor should be
responsible for the corrective action on this wing wall.
Delvin Black, Ph.D., P.E.
Senior Engineer - Structural
1100 Macon Street
Fort Worth, Texas 76102
817.480.8968 Mobile
817.336.2813 Fax
dblack@tnpinc.com <mailto:dblack@tnpinc.com>