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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 1.7 y 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 Page 3of9 LOCATION OF PROJECT ELEMENTS ,N 1 �--�• �Shl1�F'I 2&nKU#1A ` - s Pn-twy SwWordubon Toros a Struck c"W W4?$'P!-of°7 G"y is PTFMY rp I , u HIEWU CEJ +�SCS WU LOCATION OF CONCORD MAIN FLOW METER {pM ly • 1 1 x,.)F `, } r4 2 October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 10 of 19 Page 4 of 9 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 _ ' S CONCRETE REPAIRS Structure 1A Distribution Channel South Primary Effluent Channel 44 PST No. 3 - ' 6 3 October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 11 of 19 Page 5of9 GATE REPLACEMENTS Structure 1A Influent Structure y Primary Effluent Channel 7 r } Distribution Channel OCU TOWERS Headworks Pre-Aeration M - 414t w Y d 9r r • tt r a �L c 4 October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 12 of 19 Page 6 of 9 CO-INCH PRIMARY EFFLUENT PIPELINE ' 9 CONCORD MAIN FLOW METER ' 10 5 October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 13 of 19 Page 7 of 9 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 6 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 14 7 October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 15 of 19 Page 9of9 QUESTIONS 8 October 8, 2018 EOPS Regular Committee Meeting Agenda Packet- Page 16 of 19