Project 171 - Proposal - Hamers - 2004-05-23 ROBIN B. HAMERS 234E 17TH ST. SUITE 205
6 ASSOCIATES INC. COSTA MESA, CA 92627
CIVIL ENGINEERS • PLANNERS • SURVEYORS (949)549-1192
FAX(949)548-6516
May 23 2004
Board of Directors
Costa Mesa Sanitary District
77 Fair Drive
Costa Mesa, CA 92626
Re: Proposal to begin Design Phase
Project #171 Tustin Pump Station Force Main Rehabilitation (Phase I)
Dear Board of Directors:
The following is a proposal to complete the design phase of the above referenced capital
improvement project. Enclosed is the portion of the 2002 2003 capital improvement
program report that fully describes the project accompanied by a map showing the
existing force main. Due to the length of the line, the project will be divided into phases
and the limits of Phase I will be determined during the design phase.
The project is being coordinated with Project #168 Tustin Pump Station Relocation that
will relocate the pump station to another area in the intersection of Irvine Avenue and
Mesa Drive. The Tustin Pump Station is part of the system of pump stations and force
mains that convey flows from the east side of the District all the way to the intersection
of Fair Drive and Fairview Road. The other pump stations in the network are the 23rd
Pump Station, Santa Ana Pump Station, and the Elden Pump Station.
It is proposed to complete the design phase of the project as outlined in the attached
2002 2003 CIP at the hourly rates shown below not to exceed $40,000
Engineer $70 per hour
2 man survey crew 185 per hour
3 man survey crew 210 per hour
Sincerely
1
Robin B Hamers
Printed on Recycled Paper.
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cORAtEO`9`p an InOepenoent Special District
Board of Directors
Arlene Schafer
Greg Woodside
9rt Perry
James Ferryman REVIEW OF PROPOSED
Dan Ubrthington
CAPITAL IMPROVEMENT PROJECTS
Phone
(7/4) 754-5043
FISCAL YEAR 2002-2003
Fax
(7/4) 4;? 1436 Q�pFESS/pN\
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Mailing Address
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Costa Mesa.CA S�9l�OF C L1F
Prepared by
Street Address Robin B. Hamers
77 Fair Drive
Costa Mesa. c9 Manager/District Engineer
92626-6520
April 2002
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"�PORAtEV/ April 2002
B1ion` PROPOSED BUDGET
( 14) 54-5043
COSTA MESA SANITARY DISTRICT
Fax
14) 4 1436 CAPITAL IMPROVEMENT PROGRAM
if eh 4ddresc FISCAL YEAR 2002 2003
CICO<(0-lIt50 an
PROJECT #149
SINKING FUND FOR FUTURE SEWER REPLACEMENT $125 000 (CR)
%!ailing 4ddress PROJECT #159 TELEVISING SEWER LINES 18 000 (CR)
P 0 Bocl'00
Costa Alesa. Cl PROJECT#164
9'6 4-/'00 MISCELLANEOUS SEWER WORK & MANHOLE ADJUSTMENT 90,000 (CR)
PROJECT #166
MANHOLE & PUMP STATION COATING & MISCELLANEOUS WORK 200 000 (CR)
PROJECT #170
PREPARE EMERGENCY RESPONSE PLAN FOR PUMPING STATIONS 26,600 (CR)
Street 4ddress
Fair Drive PROJECT#171
Cava Item CA TUSTIN PUMP STATION FORCE MAIN REHABILITATION 540 000 (CR)
92626-65'0
TOTAL $ 999 600 (CR)
(CR) Denotes Capital Replacement Project
Board ofDireetory (CI) Denotes Capital Improvement Project
1i/ent Schafer (D) Denotes Design Phase onh at this time
Greg iiooiRule (0) Denotes Other
Art
James F rnvman
Dan ortlungton cc. Rob Hamers
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Joan Revak
Marc Puckett
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Project #171—Tustin Pump Station Force Main Rehabilitation (Phase I)
As identified in the Sewer Master Plan, a force main rehabilitation program is necessary to
insure integrity in the system. Each of the 20 pumping stations pumps uphill through a
pressurized sewer line (force main) to a point where the water can again flow by gravity
Because the force mains operate under pressure they are subject to constant wear and tear
and have a life expectancy less than half that of a vitrified clay pipe gravity sewer line.
Enclosed is the Sewer Master Plan Update section that thoroughly describes the
rehabilitation program.
The Tustin Force Main has recently experienced two ruptures, in June 1996 and in
September 2001 The section being repaired in September 2001 was analyzed and it was
determined that the rupture was indicative of problems throughout the line and the line
must be replaced or relined. The existing ductile iron pipe was installed in 1975 without a
polyethylene encasement. Polyethylene encasement is simply wrapping the outside of the
pipe in very strong plastic wrap to prevent the moisture in the soil from rusting out the
iron pipe. Because the Tustin Force Main was installed without polyethylene encasement,
the pipe rusted through from the outside in.
Enclosed is a plan showing the location of the force main. The original length of force
main was installed in 1957 and was extended in 1975 The added length was constructed
with a larger size to decrease friction losses, therefore, a portion of the line is 10 inch and
a portion is 14 inch.
Part of the design phase will be taking into consideration the new pumping capacity of the
Tustin Pumping Station which is currently under design. The installation of the Bristol
Street Pumping Station will decrease the inflow to the Tustin Pumping Station to 700 gpm
(gallons per minute) from 1200 gpm and the new pumps will be designed accordingly
The existing line is 3 400 linear feet and a portion is located in the street and a portion is
located in the dirt parkway Further study into relining versus replacement will occur
during the design phase and when the method is determined, an actual length of Phase I
construction will be finalized.
The proposed project budget is as follows:
Design $ 40 000
Construction 410 000
Inspection & Contract Administration 40 000
Reserve 50.000
Total $ 540 000
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