Alternative A – Thermal Curtain at Prattville (To be presented by PG&E)
Alternative B – Swap/Re-operation of Canyon Dam (To be presented by Bechtel and PG&E)
(Bechtel Presentation)
· D4 and D5
o Operating options
o Water delivery commitments
o Modeled water temperatures
· May or may not include ‘swap’ at powerhouses
· Adit Piping
· Chiller/Cooling Tower
o Cooling unit (tower or chiller) at Rogers Flat location
§ Adequate size for footprint
§ Would cool Rock Creek reach
§ Potential issues:
· Few possible sites
· Little cooling if smaller sites used
· Potential environmental effects
· High energy and construction costs
· Screening needed
· Structure needed to divert flows in river to cooling tower/chiller
o Two potential chiller locations for Belden Reach at Belden Dam and below Belden, at Tunnel Adit Bridge (1st bridge below Belden)
§ Tap the adit and use gravity flow to a chiller and then to river return
§ Potential issues:
· Potential FYLF habitat
· Recreation uses
· Visual
· Potential to use in-stream flows
· High energy costs
· Yellow Creek Diversion
o Potential issues:
§ Potential ESA issues
§ Recreation uses
§ Visual
· First aim for within watershed (Feather River focus) but could be outside
· Fish barrier removal – provide cold water refugia e.g. Rush Creek
· License term approach - $$ for demonstrated effective restoration (seed dollars)
· Archival management of data
· Monitoring program (implementation and effectiveness)
· Strategic plan for funding (partnering, grants, etc.)
· Quantify – formula for dollar/mile effort
o X miles for pond/plug (re-establish natural meadow function)
o X miles riparian planting
o Estimate $ amount and habitat affected
· Funding for on-going repair and maintenance
· PG&E: ~30 miles of affected reaches
o Proportional to affected reach