Tunnels – Page 33 – Southland Holdings

Highway 71 Interceptor

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Completed in 1991 by Mole Constructors, the Highway 71 Interceptor project involved approximately 3,400 linear feet of 78-inch tunnel using a 78-inch Lovat EPB Tunnel Boring Machine. The tunnel was…

West Leg Contract No. 1

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Completed in 1991 by Mole Constructors, the West Leg Contract No. 1 project encompassed roughly 10,000 linear feet of tunnel for 90-inch concrete pipe. The tunnel traversed silty clays at…

Broadview Road Relief Interceptor

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Completed in 1990 by Mole Constructors, the Broadview Road Relief Interceptor Project project entailed about 7,000 linear feet of tunneling using a Robbins 96-inch Tunnel Boring Machine. The tunnel accommodated…

Trans-Missouri River Tunnel Project

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Completed in 1991 by Mole Constructors, the Trans-Missouri River Tunnel project involved around 14,886 linear feet of 128-inch diameter tunnel, with shafts reaching depths of 340 feet using freezing methods.…

Hilltop Interceptor Contract G

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Completed in 1990 by Mole Constructors, the Hilltop Interceptor Contract G project involved approximately 12,000 linear feet of tunneling, with Monolithic concrete lining. A modified Lovat 157-inch / 164-inch Tunnel…

Wickliffe Utility Tunnel

Wickliffe Utility Tunnel https://www.southlandholdings.com/wp-content/uploads/Southland_Holdings_Stacked.png 1000 750 Southland Holdings Southland Holdings https://www.southlandholdings.com/wp-content/uploads/Southland_Holdings_Stacked.png September 23, 2025 September 23, 2025

Completed in 1995 by Mole Constructors, the Wickliffe Utility Tunnel project encompassed the construction of a tunnel spanning 152 linear feet, specifically designed to accommodate 120-inch jack pipe. Situated at…

Heights Interceptor, Contract 6

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Completed in 1995 by Mole Constructors, the Heights Interceptor, Contract 6 project entailed the construction of a tunnel spanning 8,834 linear feet to accommodate 72-inch reinforced concrete pipe. The tunnel…

Bluestone Contract 2

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Completed in 1995 by Mole Constructors, the Bluestone Contract 2 project involved the construction of a tunnel stretching of approximately 14,250 linear feet to accommodate 66-inch concrete pipe. Excavation was…

Olmsted Falls Connector Sewer

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Completed in 1994 by Mole Constructors, the Olmsted Falls Connector Sewer project entailed the construction of a tunnel spanning 15,120 linear feet to accommodate 48-inch concrete pipe. Excavation was conducted…

Gateway Stormwater Ponds Tunnel

Gateway Stormwater Ponds Tunnel https://www.southlandholdings.com/wp-content/uploads/2025/08/Gateway%20Stormwater%20Ponds%20Tunnel_01.jpg 1000 750 Southland Holdings Southland Holdings https://www.southlandholdings.com/wp-content/uploads/2025/08/Gateway%20Stormwater%20Ponds%20Tunnel_01.jpg September 23, 2025 September 23, 2025

Completed in 2015 by Mole Constructors, the Gateway Stormwater Ponds Tunnel project serves to alleviate stormwater flooding in the vicinity of Interstate Highway 10 (IH10) during and after heavy rain…