It is but not the extent it used to be. It is just a shell of its former self.
Last I heard the Fairfield Amateur Radio Association (FARA) its owner has it up for sale. I believe you need a code to bring it up or catch it on and use it.
It's really nothing more than a local linked system covering the SW Ohio area these days, if even that; as far as I know the links to nearly all the repeaters outside that area are down, and have been for a couple of years (IIRC, for the long-distance links they were in many cases using spare microwave capacity on the Verizon network, which they have since lost access to). The one in Columbus has been non-functional for at least 2 years and I no longer even have it in my radio.
As far as I'm concerned, FARA bit off
way more than they could chew by expanding into central Indiana, Kentucky, Tennessee, NE Ohio and SE Ohio without a long-term plan for operation, maintenance, and especially funding. They built a system that in it's day was quite impressive, but were unable to fund it, and their local partners (ie, the sponsors of the local repeaters they made deals with) were unable to come up with the funding on their own without help from FARA. Had they limited their area of coverage to SW Ohio, SE Indiana and northern Kentucky (maybe 60-75 miles in any direction) they might have been able to keep it going, but 150-200 miles in any direction was just too much.
I also think that FARA just did not have the will or desire to keep it going. Even with the loss of the microwave for long-distance linking, they could have kept it going through the use of Echolink and/or IRLP, which has proven to be a very effective method for long-distance linking; the fact that hasn't happened speaks volumes.
As far as Columbus to Bowling Green goes, look for Echolink or IRLP repeaters in both cities and go that route.