IIW

Construction Services

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North Cascade Road over the South Fork Catfish Creek

IIW led the emergency replacement of the North Cascade bridge after it was washed out by a summer storm in Dubuque, Iowa. IIW’s engineering team conducted a hydrologic and hydraulic analysis to determine the optimal type, size and location of the bridge over South Fork Catfish Creek. The mapped floodplain and detailed flood study led […]

Water Street over Wapsipinicon River

IIW’s work on the Water Street bridge over the Wapsipinicon River in Quasqueton, Iowa, began with the evaluation of a series of rehabilitation options. IIW helped city and county officials understand the costs of structure repair compared to a new structure. Upon the review of the widening options, the City and County chose to replace […]