Repair. When such structure is damaged to the extent of more than 50% of its equalized value at the time it became nonconforming, it shall not be restored except in conformity with the regulations of the zoning district in which it is located. A nonconforming structure which is damaged or destroyed by violent wind, vandalism, fire, flood, ice, snow, mold or infestation may be restored in accordance with the provisions of § 59.69(10m), Wis. Stats.[1]