Underwater muck sends cost of St. Croix River bridge sky high

Crews building the St. Croix River bridge near Stillwater will have to drill through 85 feet of mud and muck before they hit sandstone -- then another 30 or 40 feet to reach bedrock. That helps explain why the cost of building the bridge will be nearly triple what we paid for the 35-W bridge in Minneapolis.
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Crews building the St. Croix River bridge near Stillwater will have to drill through 85 feet of mud and muck before they hit sandstone -- then another 30 or 40 feet to reach bedrock. That helps explain why the cost of building the bridge will be nearly triple what we paid for the 35-W bridge in Minneapolis.

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