Hide and Seek

摘要

As part of a $1.2-billion project to improve the resilience of a California rail system in the event of an earthquake, a series of retrofits are being made to parts of the 40-year-old system. However, various installations of utilities and additional structures over the years means there is an unknown number of objects hidden from view. To avoid damaging these objects during retrofits at three locations, a CSDA member was given the job of finding and recording their locations.