Is the Sauk considered a navigable waterway? I ask because it seems like they can regulate propulsion on lakes, which if small enough I assume are not considered navigable waters? I know navigable waters fall under USCG jurisdiction in some regard.
lol I don’t know what I’m talking about
Absolutely. There's waterways that are a tiny fraction of the size of the Sauk that are navigable and are thus "waters of the United States."
My understanding was similar to Salmo_g's, except that I thought it was more a question of federal pre-emption than County vs. State purview. As a navigable waterway, I think the Sauk would be one of the "waters of the united states" and prohibiting travel would probably be an infringement on the right to "freedom of movement" under the Privileges and Immunities clause of the constitution. The state, under the 10th amendment, would get a carveout for "police powers" (public health/safety/welfare) which would probably allow closing a river to navigation or specifying allowable modes of transportation for safety reasons, but probably not for fishing reasons.
Edit: yeah, riverrun's right. It's right there in the definition for "Internal Combustion Motors Prohibited" that it actually means "no fishing from boat equipped with internal combustion motor." I wouldn't have thought a phrase like that would get a definition. Seems like the fine-print really changes the common-sense reading.