HomeMy WebLinkAboutPPP Dover Drive 5-63 Contingency Increase_Dec 2015 S A N l Tq T�o�L
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Orange County SanitationDistricil
Operations Committee
Dean Fisher, Engineering Manager
December 2, 2015
AML-
Dover Drive Trunk Sewer Relief
Project No . 5 =63
DOVER OR
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Project Challenges
• Existing pipe in very poor condition requiring
additional temporary bypassing
• Existing Soil and Groundwater Conditions
• Existing Pavement Variances
• Unknown Utilities
• Resultant impacts on Contractor
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Final Closeout
• Final negotiation on all outstanding costs
• Settlement reflects reduction of $ 1 .4 Million
• No budget increase due to favorable bid
• Change order rate for program including this
project remains at 3 . 7%
Lessons Learned for New Projects
• Additional utility investigation including use of
Ground Penetrating Radar
• Additional geotechnical evaluation including
more extensive soil borings
• Enhanced condition assessment of OCSD facilities
• Extensive permitting and outreach efforts to gain
consensus with Agencies and Cities
Recommended Action
• Approve a contingency increase of $596,000 (9.63%)
to the construction contract with Mike Bubalo
Construction Company for the Dover Drive Trunk
Sewer Relief, Project No. 5-63, for a total
contingency of $2,2452,700 (39.63%) .
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