Data Courtesy of U.S. Army Corps of Engineers, NWD and Chelan, Douglas, and Grant County PUDs, Yakima Klickitat Fisheries Project, Colville Tribes Fish & Wildlife (OBMEP), Oregon Department of Fish & Wildlife, Washington Department of Fish & Wildlife
Adult Passage Queries
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Notes on the DART Adult Passage Dataset
USACE Dams Video and Live Counting: From November through March, video tape fish counting occurs at US Army Corps of Engineers dams with fish ladders on the Columbia and Snake Rivers. 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. DART retrieves and posts the data as soon as it is made available. On April 1, live fish counting resumes 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.
Bonneville, The Dalles, John Day, McNary, Ice Harbor, Lower Monumental, Little Goose, and Lower Granite: On March 10, 2011, DART's Adult Passage data from the Army Corps dams--Bonneville, The Dalles, John Day, McNary, Ice Harbor, Lower Monumental, Little Goose, and Lower Granite--were updated in their entirety (1938-2011) to reflect the numbers currently reported by the US Army Corps Portland District. The updates included replacement of manually entered data from printed reports, the inclusion of historical data previously missing from DART, and the correction of counts that have been updated.
Lyle Adult Trap at Lyle Falls: Daily counts represent number of fish caught in the adult fish trap at Lyle Falls Fishway (Klickitat River RM 2.4). 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. http://www.ykfp.org/klickitat/Data_lyleadulttrap.htm
Willamette Falls Video Counting: Fish counting through Willamette Falls fishway occurs at the main viewing window. Video cameras and time lapsed video recorders are used to record fish passage 24 hrs/day, 365 days/year. The ODFW schedule for reviewing the tapes is Monday through Friday. It takes most of the day to accurately review one day of fish passage on tape when the counts are high.
Individual Status Reports
Bonneville Dam: Lamprey is the combined count from the fish counting windows at Bonneville, reported daily. LPS is the count from the Lamprey Passage Systems (LPS) at Bonneville. The fish counting windows and LPS are mutually exclusive. LPS are located at Bradford Island, Washington Shore and Cascades Island. LPS were opened in 2009 and counting started in June 2010. NOAA's LPS lamprey counts at Bonneville for 2011 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 2011-12.
Mid-Columbia Lamprey: Douglas County PUD is currently planning to translocate lamprey (trapped at Priest Rapids Dam) upstream of Wells Dam for 5 years (2018-2022), and Grant County PUD is currently planning to translocate lamprey (trapped at Priest Rapids Dam) upstream of Rock Island Dam for as long as 10 years (2018-2027).
In 2021, Grant County PUD trapped 461 adult lamprey at Priest Rapids Dam. Douglas County PUD transported/released all 461 fish upstream of Wells Dam. The total lamprey passage for Rock Island Dam, with the translocated fish included, is 1,186 lamprey. The total lamprey passage for Rocky Reach Dam, with the translocated fish included, is 1,148 lamprey.
In 2020, Grant County PUD trapped 354 adult lamprey at Priest Rapids Dam. Douglas County PUD transported/released all 354 fish upstream of Wells Dam. The total lamprey passage for Rock Island Dam, with the translocated fish included, is 834 lamprey. The total lamprey passage for Rocky Reach Dam, with the translocated fish included, is 673 lamprey.
In 2019, Grant County PUD trapped 263 adult lamprey at Priest Rapids Dam and transported/released 111 of the fish upstream of Rock Island Dam. Douglas County PUD transported/released the remaining 152 lamprey upstream of Wells Dam. The total lamprey passage for Rock Island Dam, with the translocated fish included, is 1,330 lamprey. The total lamprey passage for Rocky Reach Dam, with the translocated fish included, is 1,058 lamprey.
In 2018, Grant County PUD trapped 851 adult lamprey at Priest Rapids Dam and transported/released 177 of the fish upstream of Rock Island Dam. Douglas County PUD transported/released the remaining 674 lamprey upstream of Wells Dam. Therefore, the ladder counts for lamprey at Rock Island and Rocky Reach dams underestimate the actual numbers of lamprey that successfully passed both projects. The total lamprey passage for Rock Island Dam, with the translocated fish included, is 5,849 lamprey. The total lamprey passage for Rocky Reach Dam, with the translocated fish included, is 5,892 lamprey.
Rocky Reach Dam, June 8-9, 2005: Video was lost at Rocky Reach Dam from 1751 hours on 8 June and was not returned to operation until 0729 hours on 9 June. As a result, the adult passage counts at Rocky Reach Dam are incomplete for both days.
Tumwater Dam: Some video counts between 8/22/2011 9:19am to 9/05/2011 9:36am and between 9/23/2011 11:28am to 10/19/2011 7:52pm were not recorded, so passage counts during this period remain incomplete. Spring Chinook daily counts from 8/1/2011 - 9/15/2011 were adjusted to reflect know fallbacks from PIT tag analysis (M.Hughes, pers. com.).
Missing video counts: 7/27/12-7/30/12, 12/05/12-12/07/12, 12/17/12-12/21/12, and 12/29/12-01/01/13. Passage counts during these periods remain incomplete. Estimated sockeye passage during 2012: 66,520 fish. This run escapement includes an estimate for the number of sockeye that passed Tumwater during periods of missing video. Contact Travis Maitland for additional information pertaining to sockeye run escapement (WDFW, Wenatchee District Office, 509-665-3337).
Wanapum Dam, 2014:There were no adult passage fish counts at Wanapum Dam in 2014 due to a fracture discovered on the spillway in February 2014. 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, 2007-2008: The Lamprey adult passage counts at Wells Dam are not reflective of actual run size during 2007-2008. Trapping, monitoring, and research efforts at Wells Dam artificially lowered the passage numbers for Lamprey; i.e., more fish would have passed without tagging and trapping efforts.
Willamette Falls: The Willamette Falls fish ladder was not operational on the following dates:
- 11/29/2005-12/1/2005, 12/6/2005-12/8/2005, 12/13/2005-12/14/2005
- 8/28/2020-10/5/2020: The Willamette Falls fishway was shut down for repairs from August 28 - October 5, 2020, which precluded passage above the falls. The extended fishway closure resulted in delayed migration and large numbers 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 significant loss in the fish population.
- May 7, 2011 through August 7; 2011;
- April 26, 2012 through August 9, 2012;
- and May 4, 2013 through July 20, 2013;
- 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 31.
- Linear regression was used to estimate the missed number of sockeye passing through the right bank ladder during the time data were lost (see Miller, BM, JL Panther, and JA Arterburn. 2010. 2010 Annual Report. Confederated Tribes of the Colville Indian Reservation, Omak, WA. located at http://www.cctobmep.com/media/files/2010_OBMEP_Annual_Report.pdf)
- No steelhead were observed in the left bank ladder during the time of equipment failure; therefore, no estimated number of missed steelhead were generated. Steelhead do not typically pass Zosel Dam during the time equipment failed.
- A relatively small number of Chinook were observed during the time of equipment failure, and it was not possible to use linear regression analysis to predict missed numbers of fish. Using the proportion of sockeye passing on the left versus the right bank ladders, potentially 127 Chinook passed the right bank ladder during the time equipment failed. However, there is no certainty associated with this number, therefore this estimate was not included in the total number of Chinook reported for 2010.
- 15 May 12:00 - 20 May 12:00 = 0
- 17 Jul 00:00 - 18 Jul 19:00 = 6678
- 09 Aug 10:00 - 12 Aug 12:00 = 649
- 31 Aug 00:00 - 04 Sep 10:00 = 570
- Total Missed Sockeye count = 7897
- Initial 2008 Sockeye count = 77533
- Revised 2008 Sockeye count = 85430
- At this time, missed sockeye counts are not reflected in query results.
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.
Yakima Klickitat Fisheries Project Data: Historical daily counts for Roza Dam for the years 1940-1967 and 1982-1985 were obtained and loaded from data provided courtesy of the U.S. Bureau of Reclamation's Yakima office. In years where daily counts are not available, the Yakama Nation has provided weekly counts with data assigned to an arbitrary day in the week for which counts are available. This is the case for Prosser Dam for the years 1983-1991 and for Roza Dam for the years 1986-1990. [Text from the Yakima Klickitat Fisheries Project web page, http://ykfp.org/adultcounts.htm.]
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. The Chinook adult passage counts are the sum of hatchery spring, hatchery summer, wild spring, and wild summer chinook as reported by WDFW and Chelan PUD. The Jack Chinook adult passage counts are the sum of hatchery spring, hatchery summer, wild spring, and wild summer jack chinook as reported by WDFW and Chelan PUD.
Steelhead Counts: The Steelhead parameter includes both hatchery and wild counts. Prior to 1995 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.S. Army Corps of Engineers and Yakima Klickitat Fisheries Project. Sp = Spring, Su = Summer, Fa = Fall
Calculating the 10 year averages: The ten year averages are calculated by DART for each calendar day of data at each project. For the current year and any given project/month/day, the data is summed from the previous 10 years and divided by the number of non-null data points available during that 10 year span.