345 >>> 138 is common throughout Michigan, too.
2 subs, maybe more now, at the Indiana line run 500 .. 345 .. 138.
Fun times.
In Tennessee, we have mostly 500 kV and 161 kV, and as we dip down into Georgia, 230 kV and 115 kV. Our counterparts in Kentucky have 345, 161 in south Kentucky, and 138 kV in northern KY. There is a little bit of 500 kV in Kentucky, generally where TVA is or where TVA ties to other entities.
Missouri has a lot of 161 kV and 345, whereas parts of Oklahoma have 345 and 138. Very interesting how the system voltages have evolved over the years.
Cleveland, OH, was 345 and 138, and a touch of 69 kV, whereas Ohio Edison used a lot of 69 kV outside of the more populated areas.