ST9304-CS 941017DALLAS COUNTY
PUBLIC WORKS
October 17, 1994
Mr. Ken Griffin, P.E.
Assistant City Manager/City Engineer
City of Coppell
255 Parkway Boulevard
Coppell, Texas 75019
Re:
Belt Line Road -- Project 490-403.1/91-829
(Denton Tap Road to MacArthur Boulevard)
Pre-Design Conference and Bike Lanes
The following items were not specifically on the pre-design conference agenda but were
discussed at the conference.
Cross slope grades in the right-of-way may vary from ~" ft. up to 3: 1. Coppell
desires a of 4:1 slope maximum. This will be accommodated where ever
possible.
The minimum centerline radius to be used is 1000' with no special super
elevation.
Most left turn storage lanes will be 100'. Potential locations for left turn lanes
are Moore and Mockingbird.
The drainage design criteria will be the current City of Dallas 100 year event
criteria.
The bridge will be designed to provide either 1' of freeboard above the ultimate
100 year event or 2' of freeboard above the existing 100 year event, whichever
is more restrictiveo
Future street lighting will be provided in the roadway median.
Coppeil will provide the details and funding for pavers at all intersections.
Coppell will need the project's plan view CAD files to prepare for public
meetings.
411 Elm Street Dallas, Texas 75202 653-7151
Mr. Ken Griffin, P.E.
October 13, 1994
Page Two
The estimated additional cost for bike lanes on this project is $264,287. This cost
is for the total length of the project. The City of Dallas Bike Thoroughfare plan
does not include this portion of Belt Line Road. If Coppell wishes to include bike
lanes, the entire cost would have to be borne by Coppell.
Per our telephone conversation on Wednesday, 12, October 1994, the engineering consultant will
be directed to not include bike lanes on this project. Please call me at (214) 653-7151 if you
have any questions concerning these matters.
Sincerely,
(~roject~~nieneer
JMS:slc ~'~
Attachment
xc: Pat Kunz, P.E. Albert H. Halff Associates, Inc.
490-403.1/91-829: \PREDSIGN. BK!