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Buried Cutoff Wall Draws Attention In Twin Cities
| 题名： | Buried Cutoff Wall Draws Attention In Twin Cities |
| 正文语种： | eng |
| 作者： | DAVID MURRAY |
| 摘要： | A Mississippi River historian has been drawing attention in the Twin Cities region to a buried concrete cutoff wall, 140 years old, that has been protecting St. Anthony Falls. The wall, which is anchored in sandstone submerged in the river bottom, was built by the Corps of Engineers. But the question of who owns it now-and is therefore responsible for its maintenance-is not easy to answer. Construction of the wall began in 1869, after one of the most famous disasters in Minnesota history, when a tunneling project caused collapse of the sandstone riverbed and almost destroyed the falls. Completed in 1876, the wall is 6 feet thick at its base, about 40 feet tall and spans 1,850 feet across the river. It sits near the bottom of the horseshoe-shaped dam. |
| 出版年： | 2021 |
| 期刊名称： | The Waterways Jouranl |
| 卷： | 135 |
| 期： | 21 |
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