"The auditor began digging, speaking to many people in West Virginia state government who had been involved with the project. The Department of Education told him that it "did not request or require that the routers for the state's schools have internal dual power supplies. Education would not have made this requirement because unless a school has two power sources the feature of dual power supplies would have no use…
It would kinda be like buying a really expensive 24 port router and then just using 2 ports.....oh wait....that's what they did already. Dual power supplies is a bit overkill. Although I remember my high school admin got a central router with dual power supply, but when you plugged both in at once (from the same source) they drew too much power on a reboot and flipped the fuse after every blackout.
If the cheapest router Cisco has with dual PSUs is a 39xx, well, I guess that's what you need.
Of course, there's an argument there that "99.999% uptime" is pretty pointless for a town library in the middle of nowhere, but that's a whole 'nother argument.