Trying add a little perspective, not derail the thread, but it's a catch 22 with most dams, bridges, and building. At a certain point they're too far gone and too expensive to repair, but also too expensive to remove. They can't just be left to decay and fail either, seeing the aftermath of that.
In Hagerman, Idaho, there was a bridge given to the county/city, but it's now derelict. Owsley Bridge, which is over the Snake River, a protected river. The bridge is closed to vehicle traffic and in a terrible state of disrepair. The cost to remove it is very expensive, complicated by the fact none of it can be allowed to fall into/pollute the river. The cost to repair it, also prohibitive. It'll rot until it falls into the river.
Next to Index bridge on Highway 71, over the Red River near Texarkana, is the old truss style railroad bridge. The old bridge used to rotate on a central pillar to allow barge traffic through. That was many moons ago, when that section of the Red was navigable by barge. A new railroad bridge was built right next to it, but the old, rusted, decayed bridge remains.
I've seen several old steel truss bridges near here disappear. Old one lane bridges that carried traffic from a different era. Many of them I used as a teenager. These were short bridges over narrow creeks and rivers, so fairly easily removed and sold for scrap, some nearly a 100 years after their construction with little maintenance other than new wood decking. Many of them were visible from the new highway for decades, and now most people forgot they were even there.
The short human lifespan and likewise thought process, keeps burdening subsequent generations without penalty.
It's impossible to build your way out of a population problem. Build more highways, and more people will fill them. Build more power plants, and people will use more power. The term is included demand. I'm not proposing I know of any one solution to the whole problem, just that it's beneficial to understand these things to help oneself determine where to live, if they want to avoid somewhere with these problems, or identify the places building into these problems in the near future. House by a major roadway in a growing city, bam, Eminent Domain. Guess you'll have to move somewhere else now, how convenient. You're just outside the limits of a growing city, bam, now you've been annexed. The city recently declared your neighborhood as a flood area, after decades of increased concrete and pavement has increased runoff and flooding, bam, increased insurance or no coverage for flood damage. The once nice apartments downtown are now low rent housing, plagued with crime, but you can't afford to live like the mayor, just afford to pay the mayor's salary through taxes.
Cat's in the Cradle...Eat the Rich...Feed the Tree
The story of three wheels and a man...