2005 preliminary summer spill data
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2005 Preliminary Summer Spill Data. Fall Chinook Radiotelemetry Studies Performed by USGS – BRD, NOAA – NWFSC For the USACE Anadromous Fish Evaluation Program. Important Considerations. These estimates do not address transport vs. in-river survival nor adult return issues

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2005 Preliminary Summer Spill Data

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2005 preliminary summer spill data

2005 Preliminary Summer Spill Data

Fall Chinook Radiotelemetry Studies Performed by

USGS – BRD, NOAA – NWFSC

For the USACE

Anadromous Fish Evaluation Program


Important considerations

Important Considerations

  • These estimates do not address transport vs. in-river survival nor adult return issues

  • This information is very preliminary and the specific numbers are likely to change

  • This is the first look at subyearling passage at most of these projects including RSW’s

  • These survival estimates are relative survival estimates compared to a tailrace reference (except at Little Goose)


2005 preliminary summer spill data

Legend

Survival Metrics

Passage Metrics

% of fish

passing a dam

via a specific

route

% of fish

surviving a dam

or specific

dam passage

route

Passage Route

% of fish

surviving RSW

passage

route

% of Fish

Passing

a dam via

an RSW


Lower granite background information

Lower GraniteBackground Information

  • Study

    • Radio Telemetry – Paired Release (2200 fish released)

    • June 20 – July 22

  • Operations

    • RSW on Total Avg Q = 41kcfs

    • RSW on Spill Avg Q = 18.5kcfs (46.7%)

    • RSW off Total Q = 43.4kcfs

    • RSW off Spill Avg Q = 30.5kcfs (69.6%)


  • 2005 preliminary summer spill data

    Lower Granite Dam

    Spill

    Passage

    94%

    Turbine

    Passage

    2%

    Bypass

    Passage

    4%

    Dam

    Survival

    89.5%

    Bypass not included

    Summer Non-RSW Operations

    Spill

    Survival

    90.2%


    2005 preliminary summer spill data

    Lower Granite Dam

    Spill

    Passage

    86.5%

    Training

    18.5%

    Turbine

    Passage

    2.5%

    RSW

    68%

    RSW

    Survival

    94.5%

    Bypass

    Passage

    11%

    Dam

    Survival

    93.9%

    Bypass not included

    Summer RSW Operations


    Little goose background information

    Little GooseBackground Information

    • Study

      • Radio Telemetry – Single Release

      • Used the ~2000 fish released at LGR

      • June 21 – July 28

  • Operations

    • Total Avg Q = 39.6kcfs

    • Spill Avg Q = 17.9kcfs (44%)*

      • Spill changed during the study due to adult passage issues

        • Spill limited to 30% daytime


  • 2005 preliminary summer spill data

    Little Goose Dam

    Spill

    Passage

    84%

    Turbine

    Passage

    3%

    Bypass

    Passage

    13%

    Dam

    Survival

    91.6%

    Bypass not included

    Summer Non-RSW Operations

    Spill

    Survival

    92%


    Lower monumental background information

    Lower MonumentalBackground Information

    • Study

      • Radio Telemetry and PIT – Paired Release

      • Approximately 2200 fish released

      • *July 6 – July 16

  • Operations

    • Total Avg Q = 36kcfs

    • Spill Avg Q = 21kcfs (59%)


  • Lower monumental dam

    Spillway

    Passage

    88%

    Turbine

    Passage

    2%

    Bypass

    Passage

    8%

    Dam

    + Forebay

    Survival

    72.2%

    Dam

    Survival

    86.2%

    Lower Monumental Dam *

    Summer Non-RSW Operations

    Spill

    Survival

    90.5%


    Ice harbor background information

    Ice HarborBackground Information

    • Study

      • Radio Telemetry and PIT – Paired Release

      • Approximately 4200 fish released

      • June 10 – July 1

  • Operations

    • RSW on Total Avg Q = 50kcfs

    • RSW on Spill Avg Q = 23kcfs (46%)

    • RSW off Total Avg Q = 49kcfs

    • RSW off Spill Avg Q = 41kcfs (84%)


  • 2005 preliminary summer spill data

    Ice Harbor Dam

    Spillway

    Passage

    98%

    Turbine

    Passage

    1%

    Bypass

    Passage

    1%

    Dam

    + Forebay

    Survival

    95.1%

    Dam

    Survival

    99.6%

    Summer Non-RSW Operations

    Spill

    Survival

    99.8%


    2005 preliminary summer spill data

    Ice Harbor Dam

    Spill

    Passage

    87%

    Turbine

    Passage

    5%

    Bypass

    Passage

    8%

    Training

    27%

    RSW

    60%

    Dam

    + Forebay

    Survival

    92.9%

    Training

    Survival

    95.9%

    RSW

    Survival

    99.4%

    Spill

    Survival

    98.3%

    Dam

    Survival

    98.0%

    Summer RSW Operations


    Mcnary background information

    McNaryBackground Information

    • Study

      • Radio Telemetry - Paired Release

      • Approximately 2700 fish released

      • June 22 – July 31

  • Operations

    • Total Avg Q = 171kcfs

    • Spill Avg Q = 104kcfs (60%)


  • 2005 preliminary summer spill data

    McNary Dam

    Spill

    Passage

    64%

    Spill

    Survival

    102%

    Turbine

    Passage

    19%

    Turbine

    Survival

    86%

    Bypass

    Survival

    86%

    Bypass

    Passage

    17%

    Summer RSW Operations

    Dam

    Survival

    96.3%


    Key overall takeaways from r t studies

    Key Overall Takeaways from R/T Studies

    • The results suggest generally high subyearling survival through the projects

    • Fish Passage Efficiency (FPE, the percent of fish passing via non-turbine routes) at all projects was relatively high ranging from 81 to 100%.


    Key takeaways cont

    Key takeaways (cont.)

    • Spill Effectiveness (percent of fish passing through the spillway divided by the percent of water passing through the spillway) was higher than we anticipated for Snake River Projects and was 2-3 times higher for RSW’s than spillways.

    • Dam passage with RSW had higher survival at LGR and Lower at Ice Harbor yet neither were likely statistically significant.


    Passage metrics

    Passage Metrics


    Passage metrics1

    Passage Metrics


    Relative survival estimates

    Relative SurvivalEstimates


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