The dams at Telos have been repaired or rebuilt many times. The last crude log dam was replaced in 1924 by a timber crib dam. Sections of the dam have been replaced numerous times since then.

A Conservation Plan was prepared (Pearson 1994) and the work (partial restoration) and timber treatment was undertaken in 1995 (Ritchie 1995). Since then there has been one retreatment (CD50) in 1998.