Tri-Valley Conference

Former Members
Cedar Falls, 1939-40 thru 1941-42
Cedar Rapids Wilson, 1938-39 thru 1941-42
Independence, 1932-33 thru 1941-42
Manchester, 1932-33 thru 1941-42
Marion, 1932-33 thru 1941-42
Vinton, 1932-33 thru 1941-42

Membership Changes
1942-43: Independence and Vinton decide to join Marion and Manchester (who had been competing in multiple conferences), in the Mid-Six Conference, which is renamed the Tri-River Conference (later WaMaC Conference). Conference disbands.
1941-42: Cedar Rapids Wilson left after football season to fully align with the Mississippi Valley Conference. Cedar Falls makes known their intent to leave at the end of the school year.
1939-40: Cedar Falls joins the conference. Membership increases to 6.
1938-39: Cedar Rapids Wilson joins from the Mississippi Valley Conference. Membership increases to 5.
1932-33: Independence, Vinton, Marion, and Manchester form the Tri-Valley Conference. Original membership is 4.

Thanks to Brad Braga for clarifying the early history of this conference.