An Alameda Patch reader sent along this photo of a sign that appeared over the Labor Day weekend on the fence surrounding part of Historic Alameda High School at Oak street and Central Avenue.
It reads, "Alameda County Prison." (See close-up.)
The fence was installed in the summer of 2012. At the time, Robert Shemwell, chief business officer for the Alameda Unified School District, said the fence is designed to protect people from being hit by flying pieces of concrete and other debris in the event of a major earthquake.
It's part of the temporary seismic shoring-up work going on at Historic Alameda High, he said.