MWH Constructors, Inc, serving as the Construction Manager at Risk (CMR) and representing CITY OF AUSTIN, TEXAS - AUSTIN WATER, is providing notice of a competitive sealed proposal (CSP) for an upcoming project: Walnut Creek WWTP Expansion to 100 MGD and Enhancements – GMP 5 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 Proposal Package S516 - 25 MGD/Wet Weather Electrical and I&C Proposal Period: Starts Thursday, October 23, 2025 and Ends Thursday, December 18, 2025 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. S516 25MGD/Wet Weather Electrical and I&C, Estimated Construction Cost: $56,000,000. Scope consists of: electrical duct bank, Electrical gear, conduit, wiring, and I&C devices. 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) Prime Contractors should join the Walnut Creek WWTP CMR – GMP 5 project. 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. The Prime Contractor's contact information will be posted and updated regularly on both project pages. If any difficulties arise, you can contact the Project's general email at: WCWWTPproposals@mwhconstructors.com All registered contractors will be provided with digital access to all necessary proposal documents, drawings, specifications, and project related information through the BuildingConnected platform when the proposal period starts on Thursday, October 23, 2025. A Pre-Proposal meeting for this project will be held virtually through MS Teams at 9:00 AM (CST) on Wednesday, November 5, 2025. An associated site walk/review will be held the day after the Pre-Proposal meeting at approximately 9:00 AM (CST) on Thursday, November 6, 2025. NOTICE IS HEREBY GIVEN that all Competitive Sealed Proposals (CSP) will be electronically received. They shall be uploaded through BuildingConnected by 2:00 PM (CST) Thursday, December 18, 2025. The eligible proposals will be electronically opened and read aloud at 3:00 PM (CST) Thursday, December 18, 2025 online using the MS Teams platform. This CSP will comply with applicable Texas Gov't Codes §252 and §2269. The successful Proposer will be selected by MWH on a rational best value basis. Evaluation factors outlined in the 02-Request for Proposal document of the CSP shall be applied to all eligible Responsive Proposers in comparing proposals and selecting the successful Proposer. Award of a contract may be made without discussion with Proposers after proposals are received. Proposals should, therefore, be submitted on the most favorable terms. Until the final award of this project, MWH reserves the right to reject any or all Proposals, retract and, if necessary, re-advertise this CSP without explanation, including waiving any informalities therein. October 24 2025 IPLAAS0108220