HomeMy WebLinkAbout01/07/2003, C4 - LAGUNA LIFT STATION AND FORCE MAIN UPGRADE CHANGE ORDER, SPECIFICATION NO. 90006 i
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CITY O F SAN LUIS O B I S P O
FROM: John Moss,Utilities Director
Prepared By: David Hix,Wastewater Division Manager
SUBJECT: LAGUNA LIFT STATION AND FORCE MAIN UPGRADE CHANGE
ORDER, SPECIFICATION No. 90006
CAO RECOMMENDATION
1. Approve the change order for $61,200 for changes to the Laguna Lift Station and Force
Main Upgrade.
2. Authorize the City Administrative Officer to execute the change order.
DISCUSSION
The Laguna Lift Station and force main upgrade project is nearing completion. This project will
replace the existing lift station and force main that was overcapacity, well past its intended
operational life, and requiring significant maintenance. The upgraded lift station will serve new and
proposed annexations areas per the City's General Plan and existing customers.
During the installation of the force main several conflicts with unidentified underground utilities
and other items were encountered that resulted in delays and changes to the construction, alignment
and depth of the pipe. The force main is the discharge pipe from the pumps at the lift station and is
under pressure during pumping. During survey and design the Utilities staff and the consultant
worked diligently to determine the location and depth of all the underground utilities. The majority
of the conflicts were with utilities that were very old and abandoned, not shown on existing
drawings or was at different depths or alignments. These utilities have now been documented and
this information will be utilized for future projects such as the water reuse project.
The changes to the force main were made over one year ago to alleviate delays with this project.
These changes were deemed the best options to complete the forcemain portion of the project. It
was only recently that this change order was prepared because of delays and problems with the
contractor submitting the proper information to the City's engineering inspector.
FISCAL IMPACT
The cost for changes to the forcemain is $61,200.00. There is a current balance of $132,500
available in the construction phase of the Laguna Lift Station and Force Main CIP account.
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Council Agenda Report—Change order for Laguna Lift Station and Force Main
Page 2
Available Laguna Lift Station and Force Main CIP Funding
Unencumbered Funding Available for Construction $132,500
Forcemain Change Order ($61,200)
Unencumbered Funding Remaining $71,300
ALTERNATIVES
There are no less costly,alternatives available.
Change orders available in Council Reading File.
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