Excellent stuff Mark. Have you ever seen one yourself?
Amazing to read of a species which has actually benefitted from building work!
I believe I have seen a pair of burrowing owls at the Owl Centre (Muncaster Castle, Cumbria UK) though I don't know if they were Athena cunicularia floridana or Athena cunicularia hypugaea. The centre is the home of the World Owl Trust where conservation breeding programs and owl research takes place with 48 owl species from all over the world.
Annoyingly I have just checked my owl images I took there and I haven't got images of them
, no doubt they were dug-in somewhere in their enclosure and I didn't spot them