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Canyon Tunnel Valve House. Watershed Keeper (Royce) opens/closes valve during the inspection. 
Ropeworks assists SFPUC employees with valve inspection at Canyon Tunnel Valve House below O’Shaughnessy Dam. 
Ropeworks assists SFPUC employees with valve inspection at Canyon Tunnel Valve House below O’Shaughnessy Dam. 
Hetch Hetchy Reservoir and O’Shaughnessy Dam. 
Icicles at Hetch Hetchy . 
Foothill Tunnel Inspection: walking the tunnel over three days to document defects. Inspection Day 1 – Moccasin Portal to Red Mountain Bar East. 
Foothill Tunnel Inspection: walking the tunnel over three days to document defects. Inspection Day 1 – Moccasin Portal to Red Mountain Bar East.
SFPUC 