ST9401-CS 990115WlER & AS-~rlI~IATF'S, INC.
January 15, 1999
Mr. Garreth Campbell
City of Coppell
Coppell, Texas
Re: W&A#94093; Denton Tap Road; Coppell, Texas
Dear Mr. Campbell:
Attached are four sets of the plan sheets revised to allow connecting the bridge
structure over Denton Creek. The plans also reflect the changes made to the
gravity retaining wall along the west side of the project north of the bridge.
Specific comments are provided below:
1. The east bridge was moved two feet to the west in the revised plans. The
roadway alignment approaching the east bridge was adjusted to match the
moved bridge location. The impact to paving quantities were insignificant due to
this change.
2. The toe of riprap slopes and trail connections on the east side of the east
bridge were not changed. The embankment slope will need to be flattened
slightly to match the moved bridge location. It was agreed when the design
revisions were started that the cost in re-designing the plans was not necessary
and the slight increase in riprap quantity could be addressed in the field.
3. The approach walkways connecting to the east bridge will need to be
adjusted slightly to match the relocated bridge. The walkway quantity change is
insignificant.
4. The air & vacuum valve has been moved to a vault on the north side of the
bridge in the proposed median. Sheet 20 indicates the changes to install the
vault. The vault will be above grade and will need to be hidden by the landscape
plantings in the island. We did not change the landscape plans and feel proper
screening can best be determined in the field after the vault is built and all visual
issues are apparent. The water line can be tapped behind the abutment for the
air & vacuum valve line. It may be preferred to move the vault more to the north
than shown on the plans to improve screening space.
e-mad to: pres~dentOwter-assoc+com
III
5. The rail for the gravity wall has been changed as noted on sheet 31 of the
plans. The rail is noted to be the same as planned for the bridge at the hike &
bike trail crossing except the height can be reduced to 42" at the option of the
contractor.
We are forwarding by delivery three copies of these plans to Rebcon Inc. to allow
them to begin computations and efforts to provide a change order for the plan
revisions. The plans have not been approved by the City as yet and changes
may occur after your review. Please notify us if you note any revisions. Please
contact me if you have any questions regarding the plan changes.
Very truly yours,
Ulys Lane, III, P.E., R.P.L.S.
Enclosure: Four sets of revised plan sheets
xc: Robert Bibby w three sets of revised plan sheets