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HomeMy WebLinkAbout04.b. Receive a project update of the Mechanical and Concrete Renovations, District Project 7351 Page 1 of 9
Item 4.b.
CENTRAL
CONTRACENTRAL COSTA SANITARY DISTRICT
October 8, 2018
TO: ENGINEERING AND OPERATIONS COMMITTEE
FROM: NANCY MOLI NA, ASSOCIATE ENGI NEER
REVIEWED BY: EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER
JEAN-MARC PETIT, DIRECTOR OF ENGINEERING AND TECHNICAL
SERVICES
SUBJECT: RECEIVE A PROJECT UPDATE OF THE MECHANI CAL AND CONCRETE
RENOVATIONS, DISTRICT PROJECT 7351
Associate Engineer Nancy Molina will present the Committee with a project and budget update of the
Mechanical and Concrete Renovations Project.
Strategic Plan Tie-In
GOAL THREE:Be a Fiscally Sound and Effective Water Sector Utility
Strategy 2- Manage costs
GOAL FIVE:Maintain a Reliable Infrastructure
Strategy 2- Facilitate longterm capital renewal and replacement
ATTACHMENTS:
1. Presentation
October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 8 of 19
Page 2 of 9
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MECHANICAL AND CONCRETE
RENOVATIONS, DISTRICT PROJECT 735'I
PROJECT AND BUDGET UPDATE
Engineering and Operations Committee
October 8, 2018
Nancy Molina
Capital Projects Associate Engineer
PROJECT OVERVIEW
• The Project has focused on the rehabilitation and replacement of
mechanical equipment and concrete structures in the primary process
locations
• Summary of Pre-Design and Design Work:
Condition Assessments:
Primary Sedimentation Tanks (PST) 1-4
Pre-Aeration Tanks 1 and 2
Distribution Channels North and South
Odor Control Unit (OCU)Towers
West Gallery and Influent Pump Station Drywell
60-inch Primary Effluent Bypass Line
Structures 1, 1A7 B, and D
Replacement of gates
Replacement of rails in Primary Sedimentation Tanks
Rehabilitation of OCU Towers (Added)
Concord Main Flow Meter(Added) z
1
October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 9 of 19
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LOCATION OF PROJECT ELEMENTS
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LOCATION OF CONCORD MAIN FLOW METER
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October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 10 of 19
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ASSESSMENT RESULTS AND
RECOMMENDATIONS
Carollo, JDH Corrosion, Roto-Rooter, and Picon
Concrete Repairs and Coatings
Distribution Channels North and South
Pre-Aeration Tanks 1 and 2
Primary Sedimentation Tanks 1-4
Primary Effluent Channel
Gate Replacements
Influent Structures Area — 6 Gates
Primary Areas —40 Gates
OCU Towers — Headworks and Pre-Aeration Areas
60-inch Pipeline Repairs
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CONCRETE REPAIRS
Structure 1A Distribution Channel South
Primary Effluent Channel
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PST No. 3 -
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3
October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 11 of 19
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GATE REPLACEMENTS
Structure 1A Influent Structure
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Primary Effluent Channel
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Distribution Channel
OCU TOWERS
Headworks Pre-Aeration
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October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 12 of 19
Page 6 of 9
CO-INCH PRIMARY EFFLUENT PIPELINE
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CONCORD MAIN FLOW METER
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October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 13 of 19
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CONSTRUCTION SEQUENCE AND
CONSTRAINTS
The existing facility will operate continuously during the
Project with the majority of construction activities limited to
the dry weather season — two summers (2019 and 2020)
Bypassing of Influent Structure and the Primary Effluent
Channel
Coordination and scheduling Primary Sedimentation Tanks
offline with Operations and Maintenance
Coordination with other Capital Projects that will be
concurrently constructed in both summer 2019 and 2020
ENGINEER'S ESTIMATE
Base Bid, includes scope of work for
District Project 7351, odor control, and
other structures: $ 912501000
Additive Bid Item, Concord Main Flow Meter: 850,000
Total Estimate: $10,100,000
The Concord Main Flow Meter will require an agreement and approval of
costs between Central San and the City of Concord
12
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October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 14 of 19
Page 8 of 9
CAPITAL BUDGETS
FISCAL YEARS 2015-1 9 ANS 2019-2020
Mechanical and Concrete Renovations $ 7.3 M
Odor Control Upgrades, Phase 1 1.07 M
Outfall Improvements, Phase 7 (Structures) 2.2 M
Concord Main Metering (Shared Costs) 1.2 M
Total Budget: $11.8 M
ANTICIPATED SCHEDULE
Advertise October 8 and 15, 2018
Bid Opening October 30, 2018
Award Contract November 15, 2018
Notice to Proceed January 2019
Construction March 2019 - October 2020
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October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 15 of 19
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QUESTIONS
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October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 16 of 19