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On the Ground... In the Water... Practical Lessons learned. David Heintzman PGE Hydro Licensing NWHA February 20, 2008. NWHA February 20, 2008. “Practical” Lesson Flavors. Painful Surprising Anticipated Fortuitous Unfortunate Insightful. NWHA February 20, 2008. The Project.

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On the ground in the water practical lessons learned
On the Ground...In the Water...Practical Lessons learned

David Heintzman

PGE Hydro Licensing

NWHA

February 20, 2008

NWHA February 20, 2008


Practical lesson flavors
“Practical” Lesson Flavors

  • Painful

  • Surprising

  • Anticipated

  • Fortuitous

  • Unfortunate

  • Insightful

NWHA February 20, 2008


The project
The Project

Willamette Falls Hydroelectric Project

  • Located at Natural Water Falls/Barrier

  • Highly modified over prior 150 years,

    • Physical development (other industry)

    • Fish resources (State fish ladder, hatchery ops)

      End of prior 50-year license

  • Totally different landscape

    • Resource management

    • Relicensing process and expectations

NWHA February 20, 2008


Challenge s
Challenge(s)

  • Fish

  • Fish

  • Fish &

  • Lamprey Fish

    Provide safer downstream passage of juvenile salmonids past the Project (i.e., through the Powerhouse AND over the Falls.)

NWHA February 20, 2008


Challenges
Challenges

Find alternative to Criteria Screening of Powerhouse intake of 7,000cfs and large forebay elevation changes.

“Modified” flow around Falls leading to responsibility of fish over Falls.

Survival standard goal (99.5%) vs. Actionable survival standard (>98%).

NWHA February 20, 2008


Implemented actions
Implemented Actions

Alternate Powerhouse Bypass systems

  • Improved Forebay hydraulics

  • New Fish Bypass Route (2 total)

  • Test to prove performance

    Safer passage over Falls during the adverse conditions

  • Flow Control Structure to focus low flows.

  • Test “passed” fish to prove performance

NWHA February 20, 2008


New and extended guidewall

Curved rack entrance

Paved forebay floor

Existing bypass outfall link chute

New Bypass System chute

NWHA February 20, 2008


Flow Control Structure (FCS)

Three 50’ wide flow bays (inflatable bladder gates)

Natural chute into deep pool

NWHA February 20, 2008


Lessons learned
Lessons Learned

  • Engaging participants responsible for the resource to help protect the resource works...but it takes time and effort.

  • Testing performance of alternate structures is time consuming and expensive.

  • Things change, but frequent stakeholder site visits and conversation during construction makes field changes easier and acceptable.

  • Settlement vs. FERC license: How to satisfy both as well as parties.

NWHA February 20, 2008


Other lessons learned
Other Lessons Learned

  • Lamprey (the ‘other’ fish) proved difficult to manage...not well understood, not listed.

  • Older Project details not well documented

    • Field fit -> performance->more testing

  • “Make it happen” construction needs restraint (air-raid horns at ‘oh-dark-thirty’ not good!)

  • Be open to, and watch for, gifts (ingenuity, agency ideas, secondary benefits, etc.)

  • Settlement vs. FERC License....longer term!?!?

NWHA February 20, 2008


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