HomeMy WebLinkAbout06. (Handout) Updated Presentation ATTACHMENT 2
Item 6.
(Handout) Updated
Presentation
PUMP STATION (PS) UPGRADES
DISTRICT PROJECT 8436 -
PHASE 1 UPDATE
- Special Board Meeting
July 25, 2019
_ Jean-Marc Petit, Director of Engineering and Technical Services
Edgar J. Lopez, Capital Projects Division Manager
PS UPGRADES PHASING
• Phase 1, District Project Y
8436: ®� [�
• Orinda Crossroads PS
• Moraga PS
• Flush Kleen PS1r'
Mel Wy'" Canrortl Mafn
• Concord Metering a.oM.e Metertng Sltllwo
wo s
Vault Improvements
(Under construction _
with other project)
`• FlusisNleen _ asayelee , •Jalnut —J
• Phase 2: Scheduled for
FY 2019-20 to start _, .mum
design
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• Martinez PS
• Fairview PS •!M
• Maltby PS
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MORAGA - ORINDA CROSSROADS PUMP STATIONS
• Facilities deliver a majority of
wastewater flows from Orinda Ia�--_`r=
and Moraga and are critical
facilities
• Moraga and Orinda Crossroads
Pump Stations scope includes:
• Major electrical upgrades
• Instrumentations and controls
upgrades '
• New standby power systems - -'
• New wet weather pumping: C
• Electric driven pumps ,r
• Replace surge tanks
ALTERNATE BID ITEMS
Alternate Bid Items:
• Orinda Crossroads and Moraga Pump Stations
• Install dry pit submersible pumps for added
resiliency
• Wet weather casing replacement or rehab
depending on inspection
• Moraga PS Only
• Install mechanized grinders
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FLUSH KLEEN PUMP STATION
• Oldest PS in our System
(1950)
• Major Improvements:
• Electrical, instrumentation
and controls improvements
and upgrades
• Replace standby power
generator
CnMIL
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ANTICIPATED SCHEDULE
• 100% Design Acceptance —August 6, 2019
• Pre-qualifying general contractor and electrical
subcontractors prior to advertising (ongoing)
• Public outreach ongoing with City (ongoing)
• Advertise —August 26, 2019
• Bid Opening — October 7, 2019
• Engineering & Operations Committee — October 15,
2019
• Board Award — November 7, 2019
• Notice to Proceed — November 28, 2019
• Complete construction by Spring 2022 (majority of work
during summer of 2020 and 2021)
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CURRENT AND FUTURE BOARD ACTIONS
Current:
Increase construction contract retention from 5% to
10% due to the complexity of the project
Future (at award):
• Construction Management Services (Request for
Proposals in process)
• Engineering Support Services during Construction with
V.W. Housen and Associates (currently negotiating)
Al
BACKGROUND ON RETENTION
California Public Contract Code Section
7201
Change maximum retention from 10% to
5%
Code change effective Jan. 2012, renewed
in 2017, until 2023.
Central San Board has increased the
retention on three prior projects.
IN
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CENTRAL SAN PROJECTS THAT INCREASED
RETENTION DUE TO COMPLEXITY
HOB Seismic Project in 2012 — 10% retention
held — Successful in resolving issues with
steel and welding subcontractors
Primary Renovation Project in 2013 — 10%
retention held — Early release due to good
performance by General Contractor and
subcontractors
Headworks Screenings Upgrade Project in
2016 — 10% retention held — Successful in
resolving issues with equipment vendor and
electrical subcontractor
CENTRAL SAN FAIR RETENTION PRACTICES
WITH CONTRACTORS AND SUBCONTRACTORS
• Better to hold retainage than having to hold
payments — Less impacts on cash flow
Can help resolve stop notices: Issue of two-
party checks to pay subcontractor. E.g.; SCB
Roofing project
Stop notices and punch list completeness,
releases from vendor, suppliers, subcontractors
Partial release to subcontactors for early
activities. E.g.; excavator
5
RECOMMENDED BOARD ACTIONS
Conduct public hearing to consider adopting Resolution No.
2019-041 finding that, in accordance with California Public
Contract Code Section 7201, the Pump Station Upgrades -
Phase 1, District Project 8436, is substantially complex to
justify increasing the construction contract retention amount
from 5% to 10%
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QUESTIONS?
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