How deep is the water under the Zilwaukee Bridge?
120 ft
Zilwaukee Bridge | |
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No. of spans | 26 NB, 25 SB |
Load limit | MS 22.5 |
Clearance below | 36.5 m (120 ft) |
History |
How much did it cost to build the Zilwaukee Bridge?
The project in the bridge area will cost $36 million, encompassing the area between the north and south I-675 junction.
When was the Zilwaukee Bridge rebuilt?

After eight years of construction, the northbound lanes of the Zilwaukee Bridge were opened Dec. 23, 1987. Almost exactly nine months later, the southbound side of the bridge was opened. Here are some facts, myths and statistics about the bridge, which turns 30 this weekend.
How old is the Zilwaukee Bridge?
35Zilwaukee Bridge / Age (c. 1987)
Why did the Zilwaukee Bridge Fail?
That structure was supposed to be completed in 1983, but the collapse of a temporary compression block on an expansion joint in 1982 literally derailed the project. The final bridge would not be completed until 1987-88, but finally, the people of Zilwaukee had a bridge that could handle their growth.

Did the Mackinac Bridge Collapse?
The Mackinac Bridge reopened Friday after a crash temporarily closed it. The authority gave no details about the incident.
How long did it take to build the Mackinac Bridge?
48 months
Constructing the Mackinac Bridge actually went on into 1958 and took 48 months, 3,500 workers, 895,000 blueprints & structural drawings, 71,300 tons of structural steel, 931,000 tons of concrete, 42,000 miles of cable wire, 4,851,700 steel rivets, 1,016,600 steel bolts and 99,800,000 dollars.
How many cars have fell off the Mackinac Bridge?
Two vehicles
Two vehicles have fallen off the bridge: On September 22, 1989, Leslie Ann Pluhar died when her car, a 1987 Yugo, plunged over the 36-inch-high (91 cm) railing. High winds were initially blamed, which was not supported by recorded wind speed measurements taken on and around the bridge at the time of the accident.
How deep is the water under Mackinac Bridge?
HEIGHTS AND DEPTHS
Height of Main Towers above Water | 552 Ft | 168.25 Meters |
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Maximum Depth of Tower Piers below Water | 210 Ft. | 64 Meters |
Height of Roadway above Water at Midspan | 199 Ft. | 61 Meters |
Underclearance at Midspan for Ships | 155 Ft. | 47 Meters |
Maximum Depth of Water at Piers | 142 Ft. | 43 Meters |