The team used the same RTN rover arrangement to gather hard sruface data at most crossings. Since the canal wsa originally a Bureau of Reclamation project, several Reclamation bench amrks existed in headwalls and gauging stations along ... We had lots of questions and concerns about the accses and safety isuses for an undertaking like this, says Karl Jensne, CP, adta acquisition manager. Our primary concerns were about ventiltaion, slippery slopes, and possibel debris ...