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South Canal Hydro Project Electric Fish Barrier 01 March 2013

South Canal Hydro Project Electric Fish Barrier 01 March 2013. by Jim Heneghan Renewable Energy Engineer Delta-Montrose Electric Association. Uncompahgre Project Details. Gunnison Tunnel Completed 1909 1 of 4 Original Bureau of Reclamation Projects

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South Canal Hydro Project Electric Fish Barrier 01 March 2013

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  1. South Canal Hydro Project Electric Fish Barrier 01 March 2013 by Jim Heneghan Renewable Energy Engineer Delta-Montrose Electric Association

  2. Uncompahgre Project Details • Gunnison Tunnel Completed 1909 • 1 of 4 Original Bureau of Reclamation Projects • Irrigation water for agriculture in the Uncompahgre Valley • Uncompahgre Project • Irrigates approximately 80,000 acres • Hydroelectric Generation • Potential recognized from project onset

  3. Hydro Project Milestones • DMEA & UVWUA Agree to Partner • 01 Feb 2010 - LOPPApplication to USBR • DMEA & UWUA only applicants • August 2010 - LOPP negotiations begin • DMEA/UVWUA Agreement finalized • March 2011 - NEPA scoping meeting • Colorado Parks & Wildlife recommends fish mitigation • December 2011 – Draft EA • Comment period through Jan 2012 • Feb 2012 - Final EA & FONSI • Preconstruction Requirements • March 2012 – Notice to Proceed

  4. Hydro Project Details • Final Design • Site 1 = 4 MW • 1000 cfs maximum • 54 feet of head • Site 3 = 3.5 MW • 1000 cfs maximum • 48 feet of head • Project Budget • $22 million • Project Timeline • Construction March 2012 – July 2013

  5. Uncompahgre Project & Fish Fish Entrained in Irrigation Infrastructure East Portal – Gunnison Tunnel Intake fed by flows from the Gunnison River West Portal – Start of the South Canal after 5.8 miles of tunnel

  6. CPW Fish Count South Canal fish are counted and evaluated • CPW’s sampling results indicate South Canal has fish population equivalent to gold medal status • Pre-Hydro, substantial fish losses incurred annually after canal dewatering

  7. Hydro Project & Fish Impact of Hydro on S. Canal Fish • Fish entrainment into newly constructed hydro facilities would be potentially harmful to S. Canal fish • Screening at the East Portal would prevent annual losses and prevent entrainment into the hydro facilities

  8. Electric Fish Barrier • Why an Electric Fish Deterrent System? • Gunnison River is a gold medal trout fishery – substantial ecological and economic value • Gunnison Tunnel has allowed fish losses to the irrigation system since its inception • UVWUA had operational concerns with traditional irrigation water screening methods • Access to the Gunnison Tunnel inlet is difficult • Traditional screens need maintenance of mechanical parts and regular cleaning • Debris plugging of traditional screens may potentially damage the tunnel • Smith Root system uses electrical field to deter/guide fish away from the tunnel intake • DC pulsators housed in the tunnel gate house generate the electricity • Current is carried to the suspended electrodes • Electrical field at the electrode and extends for about 5 feet into the water

  9. Electric Fish Barrier • Fish Barrier Structure • Concrete pylons in place on the upstream bank • Concrete deadman in the foreground • Concrete base for steel structure in the middle of the picture

  10. Electric Fish Barrier • Fish Barrier Structures • Concrete deadman in foreground • Concrete base for steel structure in middle of picture

  11. Electric Fish Barrier Fish Barrier Structures - Steel structure installation underway on downstream bank

  12. Electric Fish Barrier Fish Barrier Structures - Steel structure installed on the upstream bank

  13. Electric Fish Barrier • Fish Barrier Electrodes • Catenary cables aloft while steel electrodes are installed • Electrodes are 3” in diameter and range in length from 12 ft – 16.5 ft

  14. Electric Fish Barrier • Fish Barrier Electrodes • Installation continues with fiberglass “spacers” installed on the bottom of the electrodes • Because electrodes consist of anodes and cathodes, spacers are needed to prevent contact of two or more electrodes

  15. Electric Fish Barrier Fish Barrier Installed - Operate during irrigation season. - Emits an electrical field = 2.0 – 4.0 volts per inch. - Deters fish by creating an “uncomfortable environment”; doesn’t shock them.

  16. Electric Fish Barrier Fish Barrier Installed - Fish swimming toward the tunnel are guided back to the river (toward the left in this picture)

  17. Thank You • Q & A

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