I had a pair of CAT boots about 20 years ago now, right about when they first came out. They lasted pretty good, made almost a year with them.
I used to wear out a pair of Danner steel toes every 6 to 9 months. Wolverines would last 3 months until the soles would delaminate, Doc Martins lasted one job, etc. Caustic is hell on leather boots, I wore them every day including the weekends and would just throw them in the dumpster and pull a new pair out of the box. Now I have what is essentially an office job so my Thorogoods and Wesco's are all coming up on three years old with one resole each.
With that said, look into a style of boots called "Mining Boots." They have beefy outer toe protection and are generally designed to be ankle deep in ****** conditions day in/day out.
Something like:
http://www.midwestboots.com/product/MHMT803.html
