WA9903-CS000202SHIMEK, JACOBS & FINKLEA, L.L.P.
CONSULTING ENGINEERS
8333 Douglas Avenue, #820
Dallas, Texas 75225-5816
Fax (214) 361-0204
Phone(214)361-7900
ROSS L. JACOB& P.E.
RONALD V. CONWAY, P.E.
JOHN W. BIRKHOFF, P.E.
JOE R CARTER, P.E.
GARY C. HENDR1CKS, P.E.
I. C. FINKLEA, P.E.
PAUL A. CARLINE, P.E.
MATT HICKEY. P.E.
February 2, 2000
Architectur tilities, Inc.
300 Wes amsey
P.O. x 11586
,6110
Attention: Mr. Steve Dake
Re: City of Coppell
Addition of Pump Number Four at the Village Parkway Pump Station
Dear Mr. Dake:
We are in receipt of your plan of action for the installation of the 24" isolation valve on the discharge piping of
Pumps Number 1,2 and 3 at the Village Parkway Pump Station, dated January 28, 2000. We have reviewed
and discussed your plan for this portion of the project with the City of Coppell and find it generally acceptable.
However, we recommend the following additions to the plan:
1. The piping and isolation valves for Pump Number 4 should be installed, tested and placed in service prior
to installing the isolation valves on the first 3 pumps. This is necessary in order to have the 24-inch blind
flange available in the event it is needed. Alternatively, you should have a 24-inch blind flange and gasket
on site and ready for use.
2. You should consider having a sump pump on site in the event the City's existing distribution valves don't
fully isolate the discharge header in the pump station.
Finally, as discussed in the pre-constmction conference, the final scheduling of this work will need to be
closely coordinated with the Water Utilities Department. Once work begins on any one of the isolation valves,
work shall continue around the clock until complete, or until the pump station can be placed back in service.
If you have questions or need additional direction, please do not hesitate to contact this office.
CC:
Mr. Glen Hollowell, P.E. (with AUI's letter attached)
~ Kenneth Griffin, P.E. (with AUI's letter attached)
Gary C. Hendricks, P.E.
\xs.ifxsj f_vol2\projects\clerical~coppell\1999-153\let~e~'sXconst\kNisolation valve plan .doc
GENERAL
CONTRACTORS
SUPERIOR SERVICES WITH AN EXCEPTIONAL TEAM
January 28, 2000
Gary Hendricks
Shimek, Jacob, & Finklea, L.L.P.
8333 Douglas Avenue, Suite 820
Dallas, Texas 75225
Re: City of Coppell, Village Parkway Pump Station
Sub: 24" Butterfly Isolation Valves
As we discussed on January 27, 2000, A.U.I. proposes a plan of action for the installation
of the 24" isolation valves. We propose the following procedure for each of the 24"
isolation valves.
· Prep and mark the area of pipe to be removed before the water system is shut
down.
· Have the water system shut down.
· Cut out the section of pipe necessary to install the weld flanges and isolation
valve, leaving the 24" pipe in place. (Approximately one hour)
· Fit and bolt up the flanges, gaskets, and isolation valve. (Approximately 30
minutes)
· Tack weld both the weld flanges.
· Remove the bolts, isolation valve, and gaskets.
· Fully weld both flanges. (Approximately 4 hours)
· Clean and sterilize the pipe and flanges.
· Insert the isolation valve, gaskets, and bolts (approximately 30 minutes)
· Turn on the water system.
· Flush the piping and test for leaks.
· Wait for the water system to recover before beginning the next valve.
We believe this process will take less time than disassembling aliening, and
reassembling the necessary flanges and fittings for each valve. The greatest advantage to
our proposed process is the accurate alignment of the bolt pattern and the flange spacing.
We would also be dealing with fewer flanges and fittings, reducing the risk of leaks.
As a contingency we can always remove the 90-degree bend and install the 24" blind
flange in order to put the station back in service.
fithis is acceptable we will proceed with this plan.
Steve Dake
300 WEST RAMSEY · P.O. BOX 11586 · FORT WORTH, TEXAS 76110 · 817-926-4377 · METRO 429-8191 - FAX 817-926-4387 · E-MAIL aui@auigc.corn
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