Buying on Lake Diane? It's a lake somebody built in the 1960s

Lake Diane wasn’t here when your grandparents were young. Down in the far southern corner of Hillsdale County, tight against the Ohio line in Amboy Township, the whole lake is the work of a development company. American Wonderland Corporation started building it in 1964, throwing a dam across a tributary of Clear Fork Creek and finishing the structure in 1966. When the water backed up, it drowned two small spring-fed natural lakes, Goforth and Hagerman, under one big new reservoir. The name came from a company president’s daughter.

That history matters more than it might sound if you’re house-hunting here. A lake that exists because of a dam is a lake whose water level depends on that dam staying sound and maintained — not something you can take for granted the way you would a glacier-carved natural lake. The land around it was laid out as small lots, roughly a quarter to a third of an acre each, and sold off, which is why the shoreline is packed tight with cottages and year-round homes rather than spread out on big parcels.

That density shapes daily life on the water. A lot of homes squeezed onto a built lake usually means a lake association, shared rules about docks and wakes and weeds, and assessments that show up on the tax bill to pay for upkeep — the dam, the boat launch, the weed control that a crowded recreational lake always seems to need.

None of that is a reason not to buy here; plenty of people love it, and it’s an active boating-and-fishing lake. It’s just a reason to read the fine print before you fall for the view. Ask who owns and inspects the dam, what the association charges, and what the rules say — because everything you’re looking at, water included, was somebody’s plan drawn up in the 1960s.