There was an independent review done in 1999 - the chron referenced it in an earlier article - http://www.sfgov.org/site/uploadedfiles/budanalyst/zoo/1_1animalmanagement.pdf I have not seen any documented facts - in either this report or mtg minutes, that any agency or individual ever pointed out a deficiency in the tiger exhibit - so I can’t yet feel compelled to point a “you should have known” finger at the SF zoo...just my humble opinion of course...
Of course the zoo's records told the AZA that the wall was 19 feet tall. Well over the recommended height.