46 C.F.R. § 45.193 Towboat power requirements.
Title 46 - Shipping
The towing vessel must meet the following requirements: (a) General. The towing vessel must have adequate horsepower to handle the tow, but not less than the amount specified for the routes below. (b) Milwaukee and St. Joseph routes: a minimum of 1,000 HP. (c) Muskegon route: a minimum of 1,500 HP.
Title 46: Shipping
PART 45—GREAT LAKES LOAD LINES
Subpart E—Unmanned River Barges on Lake Michigan Routes
§ 45.193 Towboat power requirements.
