HomeMy WebLinkAbout03.a. Presentation (Handout)Handout Item 3.a.
March 6, 2024
Electric Blower Improvements,
District Project (DP) 100015 and
Treatment Plant (TP) Piping
Renovations, Phase 10, DP 7369
Additional Budget and Change
Order Request
Engineering and Operations Committee Meeting
Edgar J. Lopez, P.E.
Capital Projects Division Manager
1
Two Projects Combined
1.Electric Blower Improvements:
Three New 1MW Magnetic Bearing
Electric Blowers and Electrical Panels
Three New Chillers
Three New Filter Houses
Canopy Covered Medium Voltage
Switchgear and Transformers
2
Attachment 1
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Second Project Background
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2. TP Piping Renovations, Phase 10:
Replaced Scum Piping, Gates, and Electrical for
Both North and South Quad Clarifiers
Replaced Centrate Piping in the Solids
Conditioning Building
Replaced 3W HP and LP Piping
Replaced Hydropneumatic 1W Tank, Piping,
Compressor, and Electrical Panels
3WHP Pumps 1 and 2 Variable Frequency Drive
(VFD) Replacements
Boiler Chemical Piping Replacementk4
S.
Hypo Site 1 Improvements
Replace Primary Effluent VFD
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_PpWEREX ._
1 �
Awarded Project Budget July 2021
General Contractor: Auburn Constructors, LLC (Auburn)
Construction Contracts:
Contingency:
Construction Costs:
Construction Management:
Prebid Expenditures (Design):
Total Estimated Project Budget:
I
$ 13,104,300
$ 1,440,700 (10.9%)
$ 14,545,000 (100%) A
$ 2,250,000 (15.5%) B
S 2,050,000 (14.1%) C
$ 18,845,000 (A+B+C)
Contract Status Today
Construction Contracts: $13,104,000 ($800K remains)
Contingency Approved: $1,440,700 (98% allocated)
Change Orders:
Agreed Extra Work at Roughly $1,333,000 To Date
$450 nnn of Casts Being Revie we-d
Time Extensions, Auburn Demobilized on September 1, 2023
Current Plan to Finish
Auburn Demobilized after Blowers
Commissioned
Waiting for Electrical Gear to Arrive and
Schedule Work after April
Issue a Change Order to Remobilize and
Complete the Remaining Work
All Equipment Must Be Onsite Prior to
Moving Forward to Be More Efficient and
,
Cost Effective_
Major Work includes Hypo Site 1
Improvements and Primary Effluent VFD
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Replacement
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Change Order Scope
Total Cost of $405,000 and Includes:
Mobilization and Demobilization Costs
Costs for Subcontractors, Such as Coatings
Costs of Labor and Installation Equipment
Insurance and Bonding Costs
Extended Time to Complete the Work within
90 Calendar Days
Weather Related Construction Constraints
Prevents Future Claims
IN
Overall Budget Request
Change Order: $ 405,000
Additional Construction Management: $ 430,000 **
Contingency to Close Out: 60,000
Total Budget Needed: $ 895,000
Original Completion Date: November 1, 2022
Estimated Completion Date: August 1, 2024 (20 mo.)
* Change order costs of $405K and $800K contract work remaining, total of $1.2 million.
** CM budget overspent by $230,000 to date due to extended construction time.
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Reasons for Extended Time
Major Electrical Equipment
Procurement
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Electric Blower Improvements �.
MV Switchgear oil
Busway r�
Selector Panel
TP Piping Renovations, Phase 10►
VFDs (3)
0
Motor Control Centers (3)
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Reasons for Extended Time CIO
r.
and Project Costs ��
COVID
Supply Chain Issues � ` `
Operational Constraints and.`
Coordination —�
Complex Project
Specialized Equipment
Temporary Equipment Used..
Change Orders for Additional Work
Longer Duration for Construction
Management Costs
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Revised Project Budget
Construction Contracts:
Change Orders:
Contingency Close Out:
New Construction Costs
Construction Management:
Prebid Expenditures:
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$ 13,104,000
$ 1,738,000 (13.3%)
$ 60,000
$ 14,902,000 (100%)
$ 2,686,000 (18.0%)
$ 2,050,000 (13.8%)
$ 19,638,000 (4.2% Overrun)
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Bid Results and Initial Cost Savings
PROJECT NOS.: 100015 & 7369 NO. CF ADDENDA: 2 DATEFFIME: JULY 1. 2021112.00 PM
PROJECT NAME: ELECTRIC BLOWER IMPROVEMENTS&
TREATMENT PLANT PIPING RENOVATIONS. PHASE 10
PROJECTMANAGER: NANCYMOLINA
PROJECT LOCATION: 5019 IMHOFF PLACE MARTINEZ. CA
ENGINEER'S ESTIMATE: $14,000000
NO.
BIDDER
BID PRICE
1
Aubum Constructors, LLC
S9,394,390
Sacramento, Califomia
2
C. Overaa & Co.
510,462.,000
Richmond, California
3
Mountain Cascade, Inc.
510,979.,D47
Livermore, Califomia
15
A
Recommended Board Actions
Staff recommends the following:
Authorize the General Manager to execute a construction
contract change order in the amount of $405,000 with Auburn
Constructors, LLC to remobilize and complete the Electric
Blower Improvements, District Project 100015 and Treatment
Plant Piping Renovations, Phase 10, District Project 7369; and
Authorize a budget transfer in the amount of $895,000 from
the Capital Improvement Budget Contingency to fund the
Project.
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