First round action in all three classes of South Dakota high school volleyball championships opened play Thursday in Rapid City.

Class AA

State Quarterfinal

Harrisburg def. Sioux Falls O’Gorman, 25-15, 25-18, 18-25, 25-23

Rapid City Stevens def. Huron, 13-25, 25-17, 25-21, 25-23

Sioux Falls Washington def. Mitchell, 25-15, 22-25, 17-25, 25-22, 15-10

Watertown def. Aberdeen Central, 25-21, 25-15, 25-18

Class A

State Quarterfinal

Belle Fourche def. Sioux Valley, 25-17, 16-25, 24-26, 25-23, 15-12

Dakota Valley def. Parker, 25-16, 25-12, 25-18

Madison def. Miller, 25-17, 25-20, 19-25, 25-22

Sioux Falls Christian def. McCook Central/Montrose, 25-19, 25-18, 28-30, 25-18

Class B

State Quarterfinal

Chester def. Deubrook, 25-21, 25-18, 25-17

Herreid/Selby Area def. Hanson, 25-14, 18-25, 25-21, 25-18

Northwestern def. Faith, 25-13, 25-17, 25-14

Warner def. Burke/South Central, 25-13, 25-7, 25-19