Tunneling

Bay Tunnel

Bay Tunnel

Scope

Michels constructed the first-ever tunnel to be built under San Francisco Bay. The tunnel was built as a joint venture with Jay Dee Contractors, Inc., and Frank Coluccio Construction Co. Construction of the 5-mile long, 15-foot diameter tunnel began at the 141-foot deep, 58-foot diameter Ravenswood Shaft in Menlo Park, Calif. The shaft has 3-foot thick watertight walls and a 12-foot thick concrete floor slab for strength and support. After the shaft was built, a custom-built tunnel boring machine (TBM) was lowered to the bottom and began its journey under the bay. The tunnel was dug more than 40 feet below the floor of the bay, which will help to protect it against a major earthquake. The Bay Tunnel is part of SFPUC's Water System Improvement Program. The program was designed to upgrade the aging Hetch Hetchy Water System, which provides water from the Hetch Hetchy Reservoir in Yosemite National Park to the 2.5 million people in the Bay Area.
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Projects

Michels used microtunneling to build a 485-foot-long, 6-foot diameter tunnel under a major four-lane highway.

Tunneling

Mary Hill Bypass

Canada

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Mary Hill Bypass

Michels was construction manager for a project which included construction of the 38th Street ventilation facility, trail track tunnels and cross passages, Grand Central Terminal interlocking caverns, portions of the Grand Central Terminal main station caverns, escalator shaft interfaces and access tunnels.

Tunneling

Manhattan South Structures

New York

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Manhattan South Structures

Michels is part of an integrated joint venture, responsible for the executive management, areas of field supervision, and heading engineer positions on the Central Puget Sound Regional Transit Authority's Northgate Link Extension Project.

Tunneling

North Gate Extension Light Rail N125

Washington

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North Gate Extension Light Rail N125

Michels was part of an integrated joint venture responsible for executive management field supervision and engineering on the Central Puget Sound Regional Transit Authority's University Link Light Rail Extension Project.

Tunneling

University Link Light Rail U230

Washington

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University Link Light Rail U230

Quality means doing it right
when no one is looking.

Henry Ford

We do that.

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