The cost of repairing the cracked pontoons for Seattle's new Highway 520 bridge is in the tens of millions of dollars and is expected to rise further due to the "state design team's engineering error," writes Mike Lindblom. Kiewit-General-Manson, the project's contractor, has built 32 of the 77 pontoons to be used for the project and will be paid an additional $48.8 million under a change order to fix the cracks in the first batch of pontoons. State Transportation Secretary Lynn Peterson announced Tuesday that the opening of the floating span has been pushed back from late 2014 to possibly early 2016, depending on the state's negotiations with the contractor and its partners.

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