this post was submitted on 11 Nov 2024
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There are benefits of overhead lines. They are cheaper to install, maintain, and repair. Diagnosing problems are much easier as well. They're certainly uglier and easier to damage but you don't have to dig up the road to fix them.
Newer cities shouldn't install overhead lines but to have old cities with overhead lines switch to underground ones is very expensive and takes a lot of time, something smaller cities likely don't have the budget for.
You don't have to dig up the roads to fix buried power lines any more than you have to tear up your walls to replace power lines in your house: you install a conduit (basically a pipe) under the road once and if the cable somehow gets damaged and needs to be replaced you can just run new cable through the existing conduit by simply pushing it in on one end and pulling from the other.
Transformers and other non-cable equipment are typically housed aboveground in little boxes or built in to the house, so they're actually easier to maintain than if they were installed aboveground on a pole since you don't need a cherrypicker to access it.
Obviously in a less wealthy small town with existing overhead infrastructure it doesn't make much sense to move it all underground "just because", but if you're already trenching under the road to install water/sewage/gas mains, it won't cost much extra to throw down an additional one or two smaller conduits for running power cables or telephone/cable/fiber lines.