Tri-River Conference
The Tri-River Conference, established around 1965, was a seven-member IHSAA-sanctioned conference located within Clay, Greene, Morgan, and Sullivan counties in Indiana. It was named for the southern Eel, White, and Wabash rivers which flow through the territory of the conference. Clay City, Linton Stockton, Shakamak, and Union (Dugger) high schools also participated in the Southwestern Indiana Conference at the same time. The conference disbanded at the end of the 2009-2010 school year.[1]

Former members
- Played concurrently in the TRC and SWIAC 1992-2010.
- Played concurrently in the TRC and SWIAC 1968-2010.
- Played concurrently in the TRC and WIC throughout membership
- Played concurrently in the TRC and SWIAC 1974-2010. School was known as Dugger before 1965.
- Played concurrently in the TRC and SWIAC throughout membership.
Membership timeline
<timeline> DateFormat = yyyy ImageSize = width:750 height:auto barincrement:20 Period = from:1964 till:2011 TimeAxis = orientation:horizontal PlotArea = right:30 left:0 bottom:50 top:5
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width:15 textcolor:black shift:(5,-5) anchor:from fontsize:s
bar:1 color:red from:1964 till:2010 text:Clay City (1965-2010) bar:2 color:red from:1964 till:1986 text:Montezuma (1965-1986) bar:3 color:red from:1964 till:1986 text:Rosedale (1965-1986) bar:4 color:red from:1964 till:2010 text:Shakamak (1965-2010) bar:5 color:red from:1964 till:1984 text:Staunton (1965-1984) bar:6 color:red from:1964 till:1977 text:Terre Haute Schulte (1965-1977) bar:7 color:red from:1964 till:1978 text:Terre Haute State (1965-1978) bar:8 color:red from:1964 till:1984 text:Van Buren (1965-1984) bar:9 color:red from:1965 till:2010 text:Union (Dugger) (1965-2010) bar:10 color:red from:1977 till:2010 text:North Central (F) (1977-2010) bar:11 color:red from:1986 till:2010 text:Eminence] (1986-2010) bar:12 color:red from:1986 till:1999 text:Sullivan] (1986-1999) bar:13 color:red from:1991 till:2010 text:Linton-Stockton] (1991-2010)
ScaleMajor = gridcolor:line unit:year increment:5 start:1964
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fontsize:L textcolor:black pos:(175,30) # tabs:(0-center) text:"TRC Membership History"
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References
- ^ "Metro roundup: Tri-River Conference to disband". 12 June 2009.