TR8901-CS 890721 GINN, INC.
July 21, 1989
CONSULTING ENGINEERS
Mr. Dana F. Kamp, Sign/Signalization Technician
City of Coppell
P.O. Box 478
Coppell, TX 75019
Re: Denton Tap Road Traffic Signals at
Bethel School Road and Parkway Blvd.
Dear Mr. Kamp:
As per our telephone conversation of July 18, 1989, I am writing
this letter to reiterate our discussion regarding your written
instructions to us in your June 27, 1989 letter directing us to
specify the use of the Multisonics 820 A traffic signal
controller for the subject project. For your convenience I have
attached a copy of the aforementioned letter for reference. The
reasons for your preference of the Multisonics 820 A as stated in
our June 27, 1989 telephone conversation were:
Compatibility of operation with the existing 8-phase traffic
signal controllers in the City; and
For similarity of maintenance, operation and spare parts
compatibility which will simplify replacement parts
inventory.
Our usual practice, as mentioned in our July 18, 1989
conversation, is to write an "open" specification unless we are
directed by the Owner to do otherwise. Initially the Bid
Specifications were open, but we specified the Multisonics 820 A
Controller in Addendum No. 1 as a result of your request. Having
received no written comments to the contrary from Mr. Goram or
Mr. Doyle, who also received copies of your letter, we have
complied with your request.
Please call me if you have further questions.
Sincerely,
John C. Karlsruher, P.E.
Project Engineer
JCK/dsp
cc: Steve Goram
H. Wayne Ginn, P.E.
File 356
17103 Preston Road · Suite 100 · LB 118 · Dallas, Texas 75248 · Phone 214/2484900