Tunnels

West Gates DIW Pond Expansion
West Gates DIW Pond Expansion 1000 750 Southland Holdings

Completed in 2024 by Southland Contracting, the West Gates DIW Pond Expansion Project began beneath Taxiway Whiskey Alpha (WA) / Bravo 4 (B4) in April 2023. A 60-inch manned Single…

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Elm Fork 72-inch Water Transmission Main Phase 1
Elm Fork 72-inch Water Transmission Main Phase 1 1000 750 Southland Holdings

Completed in 2024 by Southland Contracting, the Elm Fork 72-inch Water Transmission Main Phase 1 Project consisted of the construction of a 72-inch diameter water transmission main that will extend…

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Ashbridges Bay Treatment Plant Outfall
Ashbridges Bay Treatment Plant Outfall 750 1000 Southland Holdings

Completed in 2024 by Southland Contracting, the Ashbridges Bay Treatment Plant (ABTP) Outfall Project consisted of a new outfall designed to increase discharge capacity and improve the conveyance of effluent…

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Olmos Basin Central Watershed Sewer Relief Line C-3 Project
Olmos Basin Central Watershed Sewer Relief Line C-3 Project 1000 750 Southland Holdings

Project consisted of sanitary sewer pipeline installation under I35. Scope of work included 5,400 LF of 96-inch FRP open cut sanitary sewer pipeline, 640 LF of 60-inch bore, construction of…

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Frontera Force Main Emergency Contract – Phase 1
Frontera Force Main Emergency Contract – Phase 1 1000 750 Southland Holdings

This design-build emergency installation of approximately 7,200’ of 36-inch FRP force main featured fast-paced, creative, and highly adaptive thinking to bring it to life. The design was completed from project…

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Frontera Force Main Emergency Contract – Phase 2
Frontera Force Main Emergency Contract – Phase 2 1000 750 Southland Holdings

Phase 2 focused on repairing, rehabilitating, replacing, and abandoning the existing force mains and all appurtenances. Improvements included residuals handling facilities and the demolition and decommissioning of existing facilities. The…

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Joe’s Creek Interceptor Improvements
Joe’s Creek Interceptor Improvements 1000 750 Southland Holdings

Completed in 2024 by Southland Contracting, the Joe’s Creek Interceptor Improvements project consisted of the replacement of a 1.5-mile section of decrepit 30-inch reinforced concrete pipe (RCP) storm sewer within…

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Schoharie Reservoir Low Level Outlet
Schoharie Reservoir Low Level Outlet 1000 750 Southland Holdings

Completed in 2024 by Southland Contracting, the Schoharie Reservoir Low Level Outlet Project was a joint venture between Southland Contracting, Inc. and Oscar Renda Contracting, Inc. Southland’s scope of work…

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Red River Valley Water Supply: Transmission Pipeline East
Red River Valley Water Supply: Transmission Pipeline East 1000 750 Southland Holdings

Completed in 2026 by Oscar Renda Contracting, the Red River Valley Water Supply: Transmission Pipeline East project consisted of installing steel water pipeline, trenchless creek/river crossing and trenchless gas line…

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Elm Fork WTP Filter Complex, Phase 1
Elm Fork WTP Filter Complex, Phase 1 1000 750 Southland Holdings

Completed in 2027 by Oscar Renda Contracting, the Elm Fork WTP Filter Complex, Phase 1 project consisted of new filter complex and miscellaneous site work improvements. Scope of work includes…

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