In determining whether a dam or reservoir, or proposed dam or reservoir, constitutes or would constitute a danger to life or property, the department shall consider whether the structural integrity of the dam or reservoir might be endangered by overtopping, seepage, settlement, erosion, cracking, earth movement, earthquakes, or the failure of bulkheads, flashboards, gates, or conduits. The department may consider other relevant conditions. If it determines that the dam or reservoir is unsafe, the department shall order the owner to take the action that the department considers necessary to protect life and property.