明尼苏达的这个大坝的命运本来对当地政府是个难以决定的大问题。2021年的报告预计修理加上维护这个百年老坝要花费15million，每年运营亏损100k，然后再过个40年后需要再做一次决定。
或者现在开拆，5年做规划，5年干工程，可能总共要花上82million。
现在洪水冲倒了一部分，没啥说的，县政府准备花钱全拆吧。
What would it cost to repair the dam?
The 2021 engineering report put the cost of repairing the dam at $15.2 million — in addition to more than $6 million that the county had spent since 2002.
But a county report the following year raised questions about the idea. It said that even if the dam’s ability to generate electricity were restored, the county still would likely lose money — an average of almost $107,000 annually for each of the following 40 years.
And the 2021 engineering report said that after 40 years, the county still would face the same issue — whether to remove the dam. It said repairs would require three years of planning and a year of construction.
Could the county remove the dam?
The actual removal of the dam would cost $10 million, but the project would come with a lot of other costs, such as stabilizing riverbanks, preventing erosion and replacing a county road bridge over the dam — increasing the potential costs to $82 million.
What’s more, the report said, it could require five years of planning and another five years of work afterward. The report said the Minnesota Legislature might be required to authorize bonds to pay for it.
