WLFG in Gundy, Virginia which was originally analog went digital after their analog transmitter failed. TV Fool lists WLFG as...
Maximum ERP: 45.000 kW
Coordinates: 36.829831 -82.079019
You may want to expand the TV Fool database to include the WLFGDT Digital "virtual" sub-channels - Channels 68.1, 68.2, 68.3, and 68.4.
The failure issue is somewhat confusing, but Wikipedia (with some sources?) notes that...
"WLFG shut down its analog signal, over UHF channel 68, in May 2007. The station's digital signal remained on its pre-transition UHF channel 49. Through the use of PSIP, digital television receivers display the station's virtual channel as its former UHF analog channel 68, which was among the high band UHF channels (52-69) that were removed from broadcasting use as a result of the transition."