SAM #191BWC24C0008P00012

Award modification for South Bay wastewater treatment plant rehabilitation and expansion

The International Boundary and Water Commission’s South Bay plant award modification adds major rehabilitation and expansion work in San Ysidro, California. - Government buyer: International Boundary and Water Commission: U.S.-Mexico (IBWC); the notice does not identify a more specific sub-agency or office. - Award scope: Progressive design-build rehabilitation and expansion of the South Bay International Wastewater Treatment Plant. - Added work and values: Early Work Package 1C replacement-in-kind work ($13,147,453); Early Work Package 3B long-lead equipment procurement ($25,693,528); Early Work Package 4 major concrete structures ($37,468,188); Phase 1 base construction expansion ($369,613,306); and increased construction allowances ($9,804,886). - Equipment requested: Standby generators with associated switchgear, medium-voltage switchgear, positive-displacement blowers, submersible solids-handling pumps, dewatering centrifuges, stainless-steel slide gates, and stop logs. No quantities, part numbers, OEMs, or equipment vendors are identified. - Construction and rehabilitation: Replace roofs, process equipment and piping, electrical equipment, odor-control media, doors, emergency showers, and eyewashes; construct headworks and pump station facilities, sedimentation tanks, odor-control systems, sludge thickening and storage, dewatering and lime-handling facilities, electrical buildings, piping, and supporting infrastructure; and rehabilitate existing tanks and silos. - Contract value: The modification increases the contract by $445,922,475, bringing the revised total to $552,372,021.

Description

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 

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