The second-seeded Colonials (22-11) will play top seed Quinnipiac on March 10 in the conference championship for a berth in the NCAA tournament. The Colonials will be playing for their seventh conference tournament title.
Rob Robinson added 14 points, Dallas Green had 11 and Velton Jones 10 for the Colonials, who had split two games this season with Mount St. Mary's and beat the Mountaineers in last year's NEC title game.
Leading 51-48 with 16:35 to play, the Colonials went on a 13-0 run for a 64-48 lead after a basket by Mezie Nwigwe with 9:19 to play. The lead never dipped below 12 points the rest of the way.
Jeremy Goode scored 20 points and Shawn Atupem added 12 for the third-seeded Mountaineers (16-15).