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Data Courtesy of U. Chinook Run Schedules. Fish counting by video tape takes at least a few days to process: the fish counters have to make, collect, and read the tapes, and then submit their fish counts.

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DART retrieves and posts the data as soon as it is made available. On April 1, live fish counting s at all 8 Columbia River and Snake River Corps dams with fish ladders: from April through October each year for 16 hours each day, fish counters working at each fish ladder look directly into the fish ladders to count the fish passing by. The updates included replacement of manually entered data from printed reports, the inclusion of historical data ly missing from DART, and the correction of counts that have been updated.

With the exception of some fish that are collected for hatchery broodstock purposes, the vast majority of these fish are returned to the fishway to continue migrating upriver after sampling. The counts do not include fish that ascended the natural waterfalls or fish that passed through the fishway on non-trapping days. Some unknown-origin fish are recorded during fish counting that occurs as fish are returned directly to the fishway without handling or sampling.

Data is provisional and subject to change following review and validation. It takes most of the day to accurately review one day of fish passage on tape when the counts are high. Bonneville Dam : Lamprey is the combined count from the fish counting windows at Bonneville, reported daily. The fish counting windows and LPS are mutually exclusive. LPS were opened in and counting started in June NOAA's LPS lamprey counts at Bonneville for are not available to the public until motion trigger images and data logger tallies can be compared to resolve the status of lamprey passage during data gaps and anomalous data series.

This comparison is expected during the winter of Therefore, the ladder counts for lamprey at Rock Island and Rocky Reach dams underestimate the actual s of lamprey that successfully passed both projects. The total lamprey passage for Rock Island Dam, with the translocated fish included, is 5, lamprey.

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The total lamprey passage for Rocky Reach Dam, with the translocated fish included, is 5, lamprey. The total lamprey passage for Rock Island Dam, with the translocated fish included, is 1, lamprey. The total lamprey passage for Rocky Reach Dam, with the translocated fish included, is 1, lamprey. As a result, the adult passage counts at Rocky Reach Dam are incomplete for both days. Hughes, pers. Passage counts during these periods remain incomplete.

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Estimated sockeye passage during 66, fish. This run escapement includes an estimate for the of sockeye that passed Tumwater during periods of missing video. Wanapum Dam, :There were no adult passage fish counts at Wanapum Dam in due to a fracture discovered on the spillway in February The Reservoir elevation was lowered to reduce stress on the structure.

The lowered reservoir made the regular fish ladder facilities and counting equipment inoperable. GCPUD was able to make modifications for fish passage at the dam, but a count was not taken at the dam. Wells Dam, Lamprey Research, : The Lamprey adult passage counts at Wells Dam are not reflective of actual run size during Trapping, monitoring, and research efforts at Wells Dam artificially lowered the passage s for Lamprey; i.

Willamette Falls : The Willamette Falls fish ladder was not operational on the following dates:. Zosel Dam data notes. Inthe Zosel Dam video system did not begin operating until August 21,when the spillway gates were finally lowered and fish d full use of the fishways. Therefore, all of the steelhead run and the peak of the sockeye run were not counted in Gates were open: March 23, through August 21, Inthe Zosel Dam video system did not begin operating until June 1,when the spillway gates were finally lowered and fish d full use of the fishways.

Therefore, most of the steelhead run was not counted in Gates were open: April 8, through June 1, Inthe Zosel Dam video system began operating on March 11,when the spillway gates were finally lowered and fish d full use of the fishways. Most of the steelhead run was counted in but counts may have been affected when gates were open from March 23, through April 3, and May 22, through June 10, Inthe Zosel Dam video system did not begin operating until June 5,when the spillway gates were finally lowered and fish d full use of the fishways.

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Gates were open: February 15, through April 7, and May 3, through June 5, Zosel Dam - data notes. The Zosel Dam spillway gates were opened to allow for spring runoff during the periods of May 7, through August 7; ; April 26, through August 9, ; and May 4, through July 20, ; during which, an unknown of salmonids may have passed through the spillway undetected by the video system. Equipment failure resulted in a loss of data from the right bank ladder half of the sampling area at Zosel Dam, WA August 25th through October Linear regression was used to estimate the missed of sockeye passing through the right bank ladder during the time data were lost see Miller, BM, JL Panther, and JA Arterburn.

Steelhead do not typically pass Zosel Dam during the time equipment failed. A relatively small of Chinook were observed during the time of equipment failure, and it was not possible to use linear regression analysis to predict missed s of fish. Using the proportion of sockeye passing on the left versus the right bank ladders, potentially Chinook passed the right bank ladder during the time equipment failed.

However, there is no certainty associated with thistherefore this estimate was not included in the total of Chinook reported for Zosel Dam estimated adult sockeye passage counts missed due to equipment malfunction. USACE Data Disclaimer : These data are furnished with the understanding that the Corps of Engineers makes no warranties concerning the accuracy, reliability, or suitability of the data for any particular purpose.

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Yakima Klickitat Fisheries Project Data: Historical daily counts for Roza Dam for the years and were obtained and loaded from data provided courtesy of the U. Bureau of Reclamation's Yakima office. In years where daily counts are not available, the Yakama Nation has provided weekly counts with data ased to an arbitrary day in the week for which counts are available.

This is the case for Prosser Dam for the years and for Roza Dam for the years Tumwater Dam : Adult passage data for Tumwater Dam is the combination of released counts, referring to fish passed upstream of the dam and allowed to spawn naturally, and collected counts, referring to fish retained for hatchery broodstock. Steelhead Counts : The Steelhead parameter includes both hatchery and wild counts. Prior to wild steelhead data was not published on a daily basis.

The Steelhead-Wild parameter is a subset of the total steelhead and may include unmarked hatchery fish. Chinook Run Dates : Chinook runs referring to the season when adults migrate upstream are based on run schedules by project as established by the U. Calculating the 10 year averages: The ten year averages are calculated by DART for each calendar day of data at each project. Generate Query Result Link Only. Query Notes The year following the project indicates earliest data available.

If a selection for Chinook Run is undefined for the selected Project, it will be ignored and only the Start Date and End Date will be used in the query. To generate the Data Link for querying directly from scripts and automated processes: make all selections, check "Generate Query Result Link Only" next to the Submit button, and click Submit. The extended fishway closure resulted in delayed migration and large s of fish holding below the falls.

No pinniped activity was observed below the falls during this time period and no fish mortality events were reported suggesting the closure did not result in a ificant loss in the fish population.

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Zosel Dam Zosel Dam data notes.

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