The first phase of improvements to the San Francisco Zoo’s big cat enclosures has been completed, the San Francisco Chronicle reports. The exhibits have been closed since Christmas Day, when Tatiana the Siberian tiger killed one visitor and mauled two others.
To meet the minimum guidelines of the Association of Zoos and Aquariums, the concrete moat walls have been extended to 16.4 feet. The walls measured 12 ½ feet high prior to the tiger attack.
Fencing on top of the walls increases the height of the barriers to 19 feet. Wires that emit electric shocks on contact also have been installed along the moat walls.
The second phase of enclosure improvements is scheduled for completion in March. That phase will replace temporary fencing with stainless steel wire mesh.