HomeMy WebLinkAboutItem 2d: Accept Work by JA Salazar for Pressure Reducing Station as Complete OF AR
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Public Works Services Department
DATE: November 15, 2011
TO: Mayor and City Council
FROM: Tom Tait, Public Works Services Director
Prepared by: Ken Herman, Deputy Public Works Services Director
Tiffany Lee, Associate Civil Engineer
SUBJECT: ACCEPT ALL WORK PERFORMED BY J A SALAZAR
CONSTRUCTION & SUPPLY CORP. FOR INSTALLATION OF THE
PRESSURE REDUCING STATION FROM ZONE 2 TO ZONE 2A
PROJECT AS COMPLETE AND AUTHORIZE THE FINAL PAYMENT
TO BE MADE IN ACCORDANCE WITH THE CONTRACT
DOCUMENTS.
Recommendation: Approve
SUMMARY
On July 5, 2011 the City Council awarded a contract to J.A. Salazar Construction &
Supply Corp. in the amount of $135,220 for the construction of the Pressure Reducing
Station from Zone 2 to Zone 2A at Colorado Place north of San Juan Drive
(Attachment). The terms and conditions of this project have been complied with and the
work has been performed to staff's satisfaction for a total project cost of $143,274.00.
This amount reflects the original contract amount of $135,220.00 plus five (5) contract
change orders for additional and deleted work, totaling $8,054.00, or 5.96% of the
original contract price.
Staff recommends that the City Council accept all work performed by J.A. Salazar
Construction & Supply Corp. as complete and authorize the final payment to be made in
accordance with the contract documents, subject to retention of$14,327.40.
DISCUSSION
Water pressure throughout the City is regulated by the difference in elevation between
the storage reservoir and the point of use. In order to provide pressures within a
reasonable range, the City is divided into seven pressure zones, with two sub-zones.
The work performed under this contract involved adding a secondary connection from
Zone 2 to Zone 2A, based on recommendations made in the 2008 Water Master Plan.
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Mayor and Council
November 15, 2011
Zone 2A was originally designed with only one point of connection to Zone 2. This made
Zone 2A vulnerable to losing its supply of water in the event of an earthquake,
unscheduled maintenance, or some other system disruption. This contract included the
construction of a secondary connection to Zone 2A, which has improved the system
reliability of the zone.
The final construction cost of the Project is $143,274.00. This amount reflects the
original contract amount of $135,220.00 plus contract change orders for additional and
deleted work, totaling $8,054, or 5.96% of the original contract price. The nature of the
change orders include increased quantities of sidewalk and street repair necessary to
make the completed repairs connect better with the surrounding street surfaces.
Additionally; the City received credit by not having to replace approximately 50 feet of
pipe after discovering the condition of an existing pipe was acceptable for use once it
was excavated and examined by the Project Engineer.
In addition, staff approved a change order to construct a Line Stop that allows the
contractor to continue to work while not interrupting water service to local businesses
and residents. The project had originally planned to perform the shut down at night;
however, it was determined that performing the work at night would still result in a
negative impact to businesses and residents. The change order reflects the additional
cost to perform the work during the day while maintaining domestic water and fire
service to the businesses and residents. A breakdown of the additional and deleted
work performed in the change orders are as follows:
Change
Order Description of Extra Work Cost ($)
1 Additional removal and replacement of sidewalk 2,550.00
2-3 Installation of a Line Stop and 8"x8" tapping sleeve for 7,664.00
tie-in to avoid interruption of services to local
businesses.
4 Reduce the installation of 8-inch ductile iron pipe from (5,160.00)
469' to 413' and reduce the amount of removal and
replacement of curb and gutter.
5 Additional 600 SF of grind and cap asphalt concrete 3,000.00
Total Cost $ 8,054.00
The terms and conditions of this contract have been complied with and the work has
been performed to staff's satisfaction. Staff commends that the City Council accept all
work performed by J.A. Salazar Construction & Supply Corp. as complete and authorize
the final payment to be made in accordance with the contract documents, subject to
retention of $14,327.40
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Mayor and Council
November 15, 2011
ENVIRONMENTAL IMPACT:
This project consists of minor alteration of an existing public utility system with no
expansion of the system and therefore qualifies as a Class 1 categorical exemption per
15301 (b) of the California Environmental Quality Act.
FISCAL IMPACT
Funds in the amount of $260,000 have been budgeted in the 2010-11 Capital
Improvement Program for the Installation of Pressure Reducing Station from Zone 2 to
Zone 2A Project.
RECOMMENDATIONS
1. Accept all work performed by J A Salazar Construction & Supply Corp. for
the Installation of Pressure Reducing Station from Zone 2 to Zone 2A as
complete
2. Authorize final payment to be made in accordance with the contract
documents, subject to retention of$14,327.40
Approved by:
Donald Penman, City Manager
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