High Quality Content by WIKIPEDIA articles! The Saginaw Valley High School Association (commonly referred to as the Saginaw Valley League) is a high school sports league within the Michigan High School Athletic Association (MHSAA), located in the Saginaw/Flint, Michigan area. It was formed in the fall of 1904 with five teams: Bay City Eastern (Bay City Central), Bay City Western (Bay City Handy), Saginaw Eastern (Saginaw High), Arthur Hill, and Flint High (Flint Central)