Work Packages for this Competitive Sealed Proposal (CSP) are:

• Proposal Package S501 - Architectural Structures
Proposal Package S503.A - Water-Bearing Concrete Structures & UG Piping
• Proposal Package S503.B - Water-Bearing Concrete Structures & UG Piping
• Proposal Package S503.C - Water-Bearing Concrete Structures & UG Piping
• Proposal Package S515.A - Process Equipment and Above Ground Process Piping
• Proposal Package S515.B - Process Equipment and Above Ground Process Piping
• Proposal Package S515.C - Process Equipment and Above Ground Process Piping

This project, designed by AECOM, consists of construction of a variety of architectural buildings, concrete water-bearing structures, installation of process equipment and piping, and all associated electrical work.

• S501 Architectural Structures, Estimated Construction Cost: $35,000,000. Scope consists of: all CSI divisions, structural shell and architectural interior, and sub grade preparation for SOG. Excludes: mechanical and process equipment.

• S503 Water-Bearing Concrete Structures, Estimated Construction Cost: $131,000,000 (Area A, $79,000,000; Area B, $19,000,000; Area C, $33,000,000). Scope consists of: excavation, site preparation, backfill, buried piping, storm drain
piping and basins, miscellaneous metals and concrete pipe supports. Excludes: process equipment and above-ground process piping.

• S515 Process Equipment and Above Ground Process Piping, Estimated Construction Cost: $75,000,000 (Area A, $46,000,000; Area B, $12,000,000; Area C, $17,000,000). Scope consists of: process equipment, exposed piping, non-concrete
pipe supports, O&M, and training.

The objective of the eight bid packages is to break the work down into manageable contracts while ensuring the proposing contractor captures all scope in the design documents in its entirety (Whole & Complete). The work in packages S503 and S515 is further broken down into three areas (A, B & C). Area A is the new 25 MGD train. Area B is the fermenters. Area C is the UV disinfection/ Parshall flume (see attachment 6.15 in S503 and S515 work packages). This project will have MBE/WBE participation goals and relevant MBE/WBE contractor contact information will be provided to help meet these goals. All qualified contactors will receive consideration for award without regard to race, creed, color, religion, national origin, sexual orientation, gender identity, disability, veteran status, sex or age.

This project will be a Contractor Controlled Insurance Program (CCIP) that provides General Liability, Excess Liability, and Workers Compensation insurance. Proposers must exclude the costs of these coverages from their proposals.

To participate, all Contractors must first register as a potential proposer with MWH. To register as a potential proposer, please visit MWH's Public Plan Room (https://app.buildingconnected.com/public/59357015a974850b0051d1c0)

Subcontractors and vendors should join the Walnut Creek WWTP CMR - GMP 5 (Subcontractors) project.

All subcontractors and vendors must work directly with the registered Prime Contractors to participate in this solicitation. Subcontractors and vendors' price and scope must be coordinated directly with Prime Contractors. Please contact Dave Wirth at david.wirth@shimmick.com for more information.