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PROSPER / Mar 20, 2024

PROSPER project finds long-term benefits from Otta seal treatments

The recently completed research also recommends specifications for implementation

The first Otta seal, a low-cost bituminous surface treatment (BST) for low-volume roads, was constructed in Iowa in 2017. Since that first 4 mile stretch was built in Cherokee County, more than 50 Otta seal sites have been constructed.

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