ST8201-CS 881116GINN, INC.
November 16, 1988
Mr. David M. Snyder, P.E.
L. H. Lacy Co.
P.O. Box 541297
Dallas, Texas 75354-1297
CONSULTING ENGINEER
i.
Re:
Denton Tap Road Improvements from Belt Line Road to Sandy
Lake Road, Coppell, Texas.
Dear Mr. Snyder:
This letter is in response to your letters of October 28,
November 7, 8, and 11, copies of which are attached. Since all
of these letters deal with items related to the construction of
the subject project I felt it expedient to deal with them
together.
In regards to your October 28, 1988 letter concerning
installation of an additional 8" water valve in the existing
water line just south of Braewood; it is my understanding from
conversations with you and Randy Fleming that this will allow you
to isolate the water line to perform the necessary lowerings to
avoid conflicts with Storm Sewer line "B" without interrupting
service to McDonalds and other businesses. Under the
circumstances we will allow you to include this item under Field
Change No. 5.
We will allow you to reduce the number of supports for the
Sanitary Sewer Aerial Crossing extension at Grapevine Creek as
Field Change No. 6. We agree with your supporting documentation
of November 7, 1988 that the costs of additional utility work you
have had to perform more than offset the cost savings associated
with reducing the total number of piers for the crossing from 6
to 4. Therefore, in light of the foregoing and the fact that the
revised structure will be more resistant to trash accumulations
during flooding, we feel that a reduction in the price for this
item is not warranted.
We are consulting with our Landscape Architect regarding your
proposal of November 8, 1988 to revise the layout of the median
irrigation connections. If the Landscape Architect is in
agreement with your proposal, we will be happy to issue a Notice
of Field Change to cover the reduced scope of work.
17103 Preston Road · Suite 100 · LB 118 · Dallas, Texas 75248 · Phone 214/248-4900
In response to your November 8, 1988 letter asking for
clarification of the details and drawings depicting the
Irrigation Connections which are currently a part of this
project, we offer the following:
The Irrigation Connections shown on the Drainage Plan
and Profile sheets are labeled incorrectly.
The details shown on sheet 96 of 102 differ somewhat in
minor ways, but both clearly show that 2" type K copper
pipe must be used with a schedule 40 PVC sleeve. The
methods of connection to existing water mains are also
clearly shown.
In order to avoid further confusion, the detail labeled
"PVC SLEEVE FOR MEDIAN IRRIGATION" shall be used for the
Irrigation Connections on this project.
Your letter of November 11, 1988, concerning the Storm Sewer
Lateral for the Storm Sewer Inlet at Station 90+00 is not very
explicit with regard to the situation you would like us to
address. Therefore I have been in contact with our Resident
Project Representative, Mr. Randy Fleming. In my conversation
with Mr. Fleming he informed me that you are proposing to avoid a
standard water line lowering, for which there are provisions in
the Contract. Mr. Fleming has explained that under the scenario
you meant to propose in your letter, that a revision of the Storm
Sewer Lateral grades to match the existing 24" pipe, and avoid
the conflict with the 8" water line, would leave only 3"
clearance from the bottom of the 24" Storm Sewer Lateral to the
top of the 8" water line. Based on the information I have
received regarding this issue, I suggest you proceed at once in
accordance with the provisions contained in the Contract and
lower the existing 8" water line to resolve the conflict with the
Storm Sewer Lateral.
We appreciate your cooperation and will be happy to answer any
further questions you may have.
Sincerely-,
John C. Karlsruher, P.E.
Project Engineer
enclosures
cc'
Russell R. DoYle, P.E.
H. Wayne Ginn, P.E.
Randy Fleming
J378 (j3781hln.15)