DART Pacific Lamprey Summaries Lower Granite -- In Development

Data Courtesy of Pacific States Marine Fisheries Commission, U.S. Army Corps of Engineers, NWD, Grant County PUD, Yakima Klickitat Fisheries Project.

Adult Lamprey Summaries

Lower Granite Adult Passage

Lower Granite Lamprey Hourly Window Counts

graph DART Lower Granite Adult Lamprey hourly

Lower Granite Lamprey Daily Window Counts

graph DART Lower Granite Adult Lamprey daily

Lower Granite Lamprey (1/1-12/31) Project Summary

graph DART Lower Granite Adult Lamprey Rolling 4 Year Arithmetic Mean

Lower Granite Lamprey (1/1-12/31) Adult Passage with 10 Year Average

graph Daily Passage Lower Granite Adult Lamprey January 1 - December 31 with 10 Year Average
graph Cumulative Daily Passage Lower Granite Adult Lamprey January 1 - December 31 with 10 Year Average

Lower Granite Lamprey (1/1-12/31) Historical Migration Timing Characteristics

Migration Timing Characteristics
Adult Visual Counts Lamprey (daytime) at Lower Granite Dam, 1/1 - 12/31
2016 - 2025
Year Passage Dates Duration
Middle 80%
Days		 Duration
Middle 50%
Days		 Duration
Middle 90%
Days		 Run Size "Today (05/30)"
Passage %		 View Data Water Supply
NWRFC,NOAA
Apr-Sep
Pct Normal
First 5% 10% 25% 50% 75% 90% 95% Last
2026 1 YTD 05/05               05/28       3 (YTD)   Graph
Table		 91%
Average
(2016 - 2025)		 06/03 07/08 07/17 07/25 08/06 08/18 09/02 09/09 09/30 47.9 25.3 64.1 237.0 0.4%    
Average
95% CI		 05/09-06/27 06/29-07/16 07/11-07/22 07/18-07/31 07/29-08/13 08/12-08/23 08/28-09/06 09/04-09/13 09/22-10/07       104-370 -0.2-1.1%    
Median
(2016 - 2025)		 06/16 07/08 07/17 07/22 08/04 08/17 09/01 09/08 10/04 46 25.5 62.5 215.5 0.0%    
Median
95% CI		 04/05-07/02 06/28-07/30 07/10-08/06 07/17-08/16 07/27-08/27 08/12-09/05 08/30-09/19 09/02-09/24 09/18-10/19       34-631 0-3%    
2025 05/30 07/06 07/10 07/16 07/27 08/10 08/26 09/01 10/04 48 26 58 313 0.3% Graph
Table		 79%
2024 06/26 07/10 07/19 07/29 08/09 08/22 08/30 09/10 10/04 43 25 63 364 0.0% Graph
Table		 82%
2023 06/06 07/13 07/17 07/22 08/08 08/17 08/31 09/13 10/19 46 27 63 631 0.0% Graph
Table		 96%
2022 06/29 07/30 08/06 08/16 08/27 09/05 09/19 09/24 10/09 45 21 57 220 0.0% Graph
Table		 96%
2021 04/01 06/15 07/17 07/22 08/05 08/18 09/01 09/02 09/17 47 28 80 34 2.9% Graph
Table		 66%
2020 06/28 07/05 07/16 08/01 08/17 08/24 09/03 09/03 09/19 50 24 61 28 0.0% Graph
Table		 98%
2019 04/05 06/28 07/09 07/18 08/04 08/17 09/01 09/10 09/25 55 31 75 96 1.0% Graph
Table		 115%
2018 06/23 07/09 07/12 07/17 07/26 08/12 09/01 09/07 10/04 52 27 61 211 0.0% Graph
Table		 115%
2017 07/02 07/16 07/19 07/23 07/31 08/13 09/01 09/14 10/07 45 22 61 354 0.0% Graph
Table		 140%
2016 06/09 07/06 07/13 07/25 08/03 08/15 08/29 09/05 09/17 48 22 62 119 0.0% Graph
Table		 82%
  • Year 2026 is incomplete. Data presented in Migration Timing Characteristics table is data through today's date.
  • Data Courtesy of U.S. Army Corps of Engineers.
  • Date Calculations:
    1. Query DART database for passage counts by Day of Year (not calendar date).
    2. Based on query results, calculate total number of fish for each year (reported as "Run Size" in table).
    3. Based on query results, calculate cumulative number of fish by day in the year.
    4. Based on query results, calculate the Day of Year when fish passage % is equal to or greater than the target percent, e.g., 5% passage. Passage % for a day = cumulative number of fish for day / total fish in year.
    5. For each individual year target passage percent, first date, and last date results: convert Day of Year to Calendar Date for given year, taking into consideration leap year. Report calendar date in table.
    6. For each individual year middle run duration: 80% duration = 1 + (90% Day of Year - 10% Day of Year), 50% duration = 1 + (75% Day of Year - 25% Day of Year), 90% duration = 1 + (95% Day of Year - 5% Day of Year). Report days in table.
    7. For each target passage percent, first date, and last date: calculate average Day of Year for that passage target percent from each individual year Day of Year values. Convert result into integer. Treat integer as Day of Year and convert into Calendar Date for a non-leap year. Report as Average.
    8. For each target passage percent, first date, and last date: calculate median Day of Year for that passage target percent from individual Day of Year values. Convert median Day of Year into Calendar Date for a non-leap year. Report as Median.
    9. Individual year calendar date values reported in table honor leap year. Calculated calendar date values (Average and Median) treat results as non-leap year dates.
  • Water Supply historical, current, and forecast data provided courtesy of Northwest River Forecast Center, NOAA. In the Migration Timing Table, after the percent normal value the 'W' indicates the year is ranked as one of the 5 wettest years for Apr-Sep. The 'D' indicates the year is ranked as one of the 5 driest years for Apr-Sep.

Query Notes and Methods