Bridge Crossing the Middlefork of the Flathead River

The new bridge is replacing an older one that is structurally obsolete. The bridge was anticipated to require relatively high maintenance if it were built using conventional reinforcement (ECR) because it is in a heavy snow area that experiences wintertime applications of MgCl₂ (liquid form) and numerous freeze-thaw cycles. In addition, because of the rural setting and mountainous surroundings, any bridge closure involves a 480-km (300-mile) detour. For this reason, extra expense that promoted longevity with minimal maintenance was considered justified.

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