In my page about the Monivea navigations I wrote that I would be glad to hear from anyone who can provide more information about them, past or present.
Marian Hardiman has very kindly put up photos of the flax mill and a windmill near Monivea on Facebook.
She also drew my attention to the excellent site of Skehana & District Heritage, which is packed with interesting articles. A search said that there were 158 on Monivea alone.
Irish waterways history 