No, trailers are not allowed on the Merritt:
http://www.ct.gov/dot/cwp/view.asp?A=2137&Q=294976
Saw Mill River Parkway was created in 1954.
No. A U-haul truck is considered a commercial vehicle, and is not allowed. https://www.dot.ny.gov/programs/repository/Parkways%20brochure%20text.txt
No vehicle with a commercial plate is allowed on any of New York State's parkways. This includes the Taconic and Saw Mill, to name a few. If your moving truck has a commercial plate, you will have to find another route.
River Mill Hydroelectric Project was created in 1911.
The address of the New Marlborough Town Library is: 1 Mill River -Great Barrington Road, Mill River, 01230 1651
The address of the Historic Savage Mill Inc is: 8373 Piney Orchard Parkway, Odenton, MD 21113-1541
on a river
The Merimack River,mill owners dammed it.
The address of the Fall River Mill Association is: 88 Clear Creek Rd, Leoma, TN 38468-5401
It is on the American River which flows through California's Sacramento Valley
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Mill Creek flows into the Colorado River near Moab, Utah.