Weather rarely breaks infrastructure outright. It finds what was already weak and finishes the job, which is why the useful work happens long before the storm does.
What follows is what we actually look at when a utility asks us why the same section of line keeps coming down.
How the damage really accumulates
Environmental stress is mostly cyclical rather than dramatic. Temperature swings expand and contract materials, which works connections loose over years. Moisture gets into a joint, freezes, and widens it. Corrosion attacks dissimilar metals at exactly the points where the design assumed a solid connection. Wind and ice add mechanical load that the structure was designed to carry, once, when it was new.
None of it produces a failure on the day it happens. It produces one four winters later, on the night the wind gets above what the line can still carry.
The loading question most people skip
The NESC divides the country into loading districts, and most of Indiana sits in the Medium district, with specified combinations of ice thickness, wind pressure and temperature that structures have to be designed against. A line built to that standard forty years ago was built correctly.
What is worth asking is what has changed on it since. Fiber or communications attachments change the loading. So does a heavier conductor, an added circuit, or a pole that has lost section to rot at groundline. Each one on its own is defensible. Together they can push a structure past what it was designed for without anybody recalculating anything.
Where the money goes furthest
Not evenly. On most systems a small number of spans account for most of the outage minutes, and finding them is a data exercise rather than a walking one. Your outage records, read as a pattern by circuit and by cause, will usually point at them.
After that the items worth most tend to be dull ones: groundline inspection and treatment on wood structures, drainage around substation foundations, sealing conduit entries, infrared scanning of connections before the heating season. All cheap against a replacement, and all of them left undone because nothing is currently wrong.
The one that gets missed
Drainage. It undermines foundations quietly and it is almost never on anybody's maintenance list, because water damage doesn't look like an electrical problem until the day it becomes one.
