It worked for fifty years without a problem, so the system was relatively sound. Something changed in the last few years. If the system deteriorated, that means maintenance was neglected.
B-52’s are still flying 60 years on. I can’t believe a concrete structure, properly maintained, won’t last at least as long.
If I recall, the main spillway has not seen a great deal of use overall.
If I recall, the main spillway has not seen a great deal of use overall.