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Big Savage Tunnel
The 3,300 foot Big Savage Tunnel is part of the Allegheny Highlands Trail in Pennsylvania. The trail follows the former Western Maryland Railroad right-of-way through Somerset County, PA. This trail is part of the Great Allegheny Passage, a 152 mile bicycle and walking trail that will eventually connect Pittsburgh with the C&O Canal in Cumberland, Maryland. more information |
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City of Milwaukee Sewers
The contract awarded to ACT by the City of Milwaukee was for the structural lining of 1,650 feet of a 100 year old brick sewer. Prior to shotcrete application, the brick surface of the sewer was cleaned with a 7000 psi water blaster to remove all dirt and debris. A sewage by-pass system was installed allowing the sewer to remain in operation and enable our work to be completed in the dry. more information |
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Detroit River Tunnel
The Detroit River Rail Tunnel is one of the oldest sunken twin tube tunnels in North America. The tunnel is used to transport goods vial rail car beneath the Detroit River to and from Canada and the United States. The tunnel enlargement project was required to allow double stacked rail cars to pass through the tunnel. The work was performed in the northbound tube from Windsor, Ontario to Detroit, Michigan and crossed an international border. more information |
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Detroit Windsor Car Tunnel
Construction of the tunnel began in the summer of 1928, at approximately the same time on both sides of the river. The completion of the tunnel was an engineering feat unparalleled at the time, which combined three different tunneling methods. On each side of the river, a cut and cover method was used on the sections from where the open cut trenches end to the harbor line. Earth was dug away by muckers or sandhogs that used manually operated knives to cut a path for the giant shield wall. more information |
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Shoal Lake Aqueduct
ACT was awarded the major crack repair program, instituted by the City of Winnipeg to repair the inside of the 85 year old unreinforced concrete Aqueduct. The aqueduct extends from the City of Winnipeg to Shoal Lake approximately 100 km away and is the sole source of water for the City of Winnipeg. more information |
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Southern Arsenal Relief Sewer - Phase 1
ACT was the Prequalified Specialty Contractor awarded the sewer rehabilitation contract by the Metropolitan St. Louis Sewer District. The rehabilitation specified to stabilize the 10 ft x 10 ft horseshoe shape concrete sewer consisted of consolidation grouting of voids behind the sewer and shotcrete repairs to delaminated areas. more information |
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Southern Arsenal Relief Sewer - Phase 2
ACT was the Prequalified Specialty Contractor awarded the sewer rehabilitation contract by the U.S. Army Corps of Engineers St. Louis District. The rehabilitation specified to stabilize the 10 ft x 10 ft horseshoe shape concrete sewer consisted of consolidation grouting of voids behind the sewer and minor concrete repairs. To facilitate the void grouting, chemical grout rings were installed every 100 feet in the sewer to provide containment bulkheads during grouting. more information |
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Washington Aqueduct
The Washington Aqueduct is a 100 year old historic brick/stone masonry rubble raw water conduit. The repair specified for the aqueduct was relining utilizing reinforced shotcrete. ACT utilized several customized pieces of equipment to complete the project including the following: a fully automated mobile shotcrete batch plant to proportion, batch and convey shotcrete into the aqueduct, an automated wire mesh installation machine, and a fully automated shotcrete robot used to accurately and consistently place the 2.5 inch silica fume enhanced shotcrete lining. more information |
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