Arkwright-Boston Manufacturers Mutual Insurance Company, Cross-Appellant v. Wausau Paper Mills Company, Cross-Appellee

CUDAHY, Circuit Judge.

The defendant, Wausau Paper Mills Company (“Wausau Mills”), purchased an all-risk property insurance policy from the plaintiff, Arkwright-Boston Manufacturers Mutual Insurance Company (“Arkwright”). Wausau Mills subsequently attempted to recover under that policy the costs of repairing damage to a reactor it owned and operated. Arkwright denied the claim, maintaining that the damage was not an insured risk under the terms of the policy. The district court entered summary judgment in favor of Arkwright.

I

Wausau Mills manufactures and sells paper. It purchased an all-risk…