Craig Dies and Carmen Brun of Rockville Municipal Swim Center and Mike Nemec and Sudi Miller, both of the Knights of Columbus Orchards of Baltimore, were the leading point producers in the 12th annual Potomac Valley Cherry Blossom swim meet that concluded yesterday at Bowie State College.

Dies won the boys 13-14 championship by edging out Nathan Hamilton of Curl Swim Club in Bethesda, 51 points to 48. Dies, who won two individual events Saturday, yesterday won the 400-yard individual medley in 4:24.39.

Dies was second yesterday to Hamilton's winning time of 1:03.72 in the 100-yard breaststroke.

Brun placed first in the girls 400-yard individual medley (4:48.59), allowing her to win the girls 13-14 title over Kim Hughes of Curl, 42-41. Terry Kominski of Rockville, who was third with 34 points, won the 100-yard breaststroke in 1:08.08.

Miller won the senior girls title with 54 points, and Susan Bier, who competed unattached, was second with 39 points. Yesterday, Miller won the 100-yard backstroke in 1:02.89. Adrienne Kubeluis, who was third with 30 points, won the 200-yard freestyle in 1:58.83.

Nemec won the senior title with 54 points over teammates Carroll Mann (39) and Jamie LeGoff (33).

The most exciting finish of the afternoon came in the girls 13-14 100-yard backstroke. The race was called a dead heat between Rockville's Chris Spector and Teri Messenger of the Bulldog Swim Club of Bowie in 1:03.02.