Minitex " is a publicly supported network of academic, public, state government, and special libraries working cooperatively to improve library service for their users in Minnesota, North Dakota and South Dakota." It's largely run by the University of Minnesota Libraries. I'm told that it's the most active interlibrary loan network in the United States.
(Click to enlarge) Books tagged and waiting to be shipped or reshelved
(Click to enlarge) Preparing the shipping bins