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Thunderhead Falls Tunnel South Dakota
Feature Name: Thunderhead Falls Tunnel
Feature Type: tunnel
State: South Dakota
County: Pennington
County Population: 88565
County Housing Units: 37249
County Size: 2776.15 Square Miles
Latitude: 44.05833
Longitude: -103.41306
Map Cell Name: Pactola Dam
Geographic Keywords: Falls, Thunderhead, Tunnel

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