For all its hot licks and just-right harmonies, Dierks Bentley's new full-length Up on the Ridge lets its bluegrass-meets-country concept disperse into songs that skirt Music Row hackdom and playing that is virtuosic but empty. On his 2005 single “Lot of Leavin' Left to Do," Bentley and producer Brett Beavers achieved a dense fusion of bluegrass and country-rock. A limited if genial singer, Bentley has made records more notable for their sonics and devotion to the mythos of the road (and the free love it encourages) than their emotional depth. Still, Up on the Ridge plays out as intermittently interesting bluegrass-flavored country. Jon Randall Stewart's production gives room to guests on the order of Sam Bush and Alison Krauss — hot licks abound. Bentley covers Dylan and U2 effectively, but his bluesy version of Verlon Thompson and Suzi Ragsdale's "Bad Angel" is the keeper.