District 112′s athletic and activities programs will jump to the newly formed Metro West Conference, which will begin play in the fall of 2014. Chanhassen and Chaska High School will join Bloomington Kennedy, Bloomington Jefferson, Robbinsdale Cooper, St. Louis Park, and Richfield in the new conference.
The new conference will provide the Hawks and Storm with opponents closer geographically, similar in enrollment, and many of them (like the Bloomington schools and Robbinsdale Cooper) are multi-high school districts.
Chaska and Chanhassen both leave the Missota Conference, which will also lose Shakopee and Farmington at that time as well (both of those schools are moving to South Suburban, effectively taking the place of Bloomington schools). The Missota will be down to four schools at that time, and if it fails to add more schools it will be broken up by the Minnesota State High School League.
Creation of the new conference has been rumored for quite some time, as District 112 ran into significant opposition from schools in the Missota over issues like the combined girls hockey program.
You can read the full press release on the District 112 website.