| 2. |  | Flood damages, June 9-10 1972. Debris caught in the west-bound lane ""downstream"" Interstate 90 across Box Elder Creek. | Floods -- Black Hills (S.D. and Wyo.) Floods -- South Dakota -- Rapid City (S.D.) | Flood damages, June 9-10 1972. Debris caught in the west-bound lane ""downstream"" Interstate 90 across Box Elder Creek. |