CF-Village-CS 890214 GINN, INC. CONSULTING ENGINEERS
February 14, 1989
Mr. Mike Bush
Preload Construction Company, Inc.
839 Stewart Avenue
Garden City, New York 11530 /
Re: Village Parkway Reservoir
City'of Coppell, Texas
Dear Mr. Bush:
It has come to our attention that the construction method
currently being used on the wall diaphram joints of the above
referenced project is creating a horizontal cold joint in the
vertical joint between wall panels. Our past experience with
prestressed concrete tanks has been that a monolithic pour for
the wall joint is used to ensure the watertight integrity of the
joint.
We are extremely concerned that these cold joints may create
future problems in the watertightness of the tank, i.e. after the
warranty period. Please provide us with additional information
on this wall joint method so that we may evaluate its suitability
for this project. Specifically, we would like the following
questions addressed:
1) What waterproofing measures will be used on the cold joint?
2) Will the internal epoxy coating be applied before or after
the prestressing?
3) Will any type of epoxy or waterstop be used in the cold
joint itself?
4) Has this method been used on other tanks? Where? How long
have they been in service?
Please feel free to contact us if you have any questions.
Sincerely,
Case, P.E.
cc: Steve Goram
H. Wayne Ginn, P.E. J.R. Richardson
File 381
17103 Preston Road · Suite 100 · i,B i!8 · Dallas. Texas 75248 · Phone 214/248-4900