South Bay International Wastewater Treatment Plant (SBIWTP) Rehabilitation and Expansion Progressive Design-Build (PDB)
Award Notice Posted
- Solicitation number
- 191BWC24C0008P00012
- Awarded
- Set-aside
- No set-aside
Opportunity facts
- Contract number
- 191BWC24C0006P00001
- NAICS code
- 237110 Water and Sewer Line and Related Structures Construction
- Place of performance
- San Ysidro, California 92173, United States
- Points of contact
Notice details come from SAM.gov. Updated .
About this opportunity
The International Boundary and Water Commission U.S.-Mexico awarded a modification to its progressive design-build contract for the South Bay International Wastewater Treatment Plant rehabilitation and expansion on September 29, 2026, adding construction packages and Phase 1 expansion work valued at $445.9 million in aggregate final construction prices.
The modification incorporates Early Work Package 1C (roof replacement, process equipment and piping replacement, electrical equipment replacement, odor control media replacement, window sealant installation, coiling door replacement, emergency shower and eyewash replacement, and facility painting and coating) at $13.1 million; Early Work Package 3B (procurement of critical long-lead equipment including standby generators, switchgear, blowers, submersible pumps, dewatering centrifuges, and stainless steel slide gates) at $25.7 million; Early Work Package 4 (major concrete structures for new Headworks facilities, Primary Sedimentation Tanks 6 and 7, storage warehouse, and associated infrastructure) at $37.5 million; and Phase 1 Base Construction Expansion (new Headworks facility with integrated pump station, screening and grit removal, primary sedimentation expansion, odor control facilities, dewatering upgrades, lime storage and truck loadout facilities, chlorination storage facility, administrative building expansion, electrical buildings, and utility distribution systems) at $369.6 million. The award was made under unrestricted competition with no set-aside applied.
Notice text
The purpose of this modification is to incorporate additional construction packages and Phase 1 expansion work into the progressive design-build contract. The modification adds the following construction packages:
Early Work Package (EWP) 1C – Replacement In Kind
Final Construction Price: $13,147,453
Scope includes:
- Removal and replacement of existing roofs.
- Replacement of process equipment and piping.
- Replacement of electrical equipment.
- Replacement of odor control media.
- Installation of new window sealants.
- Replacement of coiling doors.
- Replacement of emergency showers and eyewashes.
- Painting and coating of existing facilities.
Early Work Package (EWP) 3B – Early Procurement
Final Construction Price: $25,693,528
Scope includes procurement of critical long-lead equipment, including:
- Standby generators and associated switchgear.
- Medium-voltage switchgear.
- Positive displacement blowers.
- Submersible solids-handling pumps.
- Dewatering centrifuges.
- Stainless steel slide gates.
- Stop logs.
Early Work Package (EWP) 4 – Major Concrete Structures
Final Construction Price: $37,468,188
Scope includes:
- Construction of major concrete structures for new Headworks facilities.
- Primary Sedimentation Tanks 6 and 7.
- Storage Warehouse.
- New influent and drainage infrastructure.
- Associated piping, carpentry, architectural, mechanical, electrical, and support features.
Phase 1 Base Construction Expansion
Final Construction Price: $369,613,306
Scope includes:
- New Headworks facility with integrated pump station.
- Screening and grit removal systems.
- Primary sedimentation expansion.
- Centralized odor control facilities.
- Waste activated sludge thickening and storage facilities.
- Dewatering upgrades.
- Lime storage/feed and truck loadout facilities.
- Storage warehouse.
- Chlorination storage facility.
- Administrative building expansion.
- Multiple electrical buildings.
- New electrical service, generators, utility distribution systems, process piping, and site work.
- Rehabilitation of existing activated sludge tanks and lime silos.
- Engineering services during construction and procurement of the effluent meter and bypass piping.
Construction Allowances
The contract also increases CLIN 008 Construction Allowances by $9,804,886, increasing the allowance amount from $1,783,374 to $11,588,260 to address uncertain construction elements and field conditions associated with EWP-1C and Phase 1 construction activities. [191BWC24C0008 P00012 | PDF]
Period of Performance
The base construction period of performance has been revised to 1,643 calendar days (54 months) from issuance of the Base Construction Notice to Proceed (NTP). Construction closeout requirements remain unchanged and must be completed within 180 calendar days following construction completion.
Award Value
- Previous Contract Value: $106,449,546
- Modification Increase: $445,922,475
- Revised Total Contract Value: $552,372,021
Awarded contract 191BWC24C0006P00001 to PCL Construction Inc. dba PCL Construction Services for 552372021.00 on 2026-09-29.
Similar open opportunities
| Opportunity | Agency | Set-aside | Responses due |
|---|---|---|---|
| Operations and Maintenance (O&M) Services for the SBIWTP | International Boundary and Water Commission U.S.-Mexico | No set-aside |
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