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Adult Snake River Chinook Spring/Summer ESU Historical and Current Year Mean Travel Time Estimates

Click on a reach travel time in the table to view a plot of the reach-specific daily mean travel time as it varies throughout the season. The date of the daily mean travel time is determined by and plotted on the reach entry date, i.e., the date of the last detection for each PIT-tagged fish at the first project in the reach. The plots include a 95% confidence interval for each reach entry date on which more than one fish started traversing the reach.


Arithmetic mean travel times by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
BON-MCN 7.78 8.43 6.57 6.79 7.59 7.48 7.68 6.23 6.14 8.31 7.00 6.34 6.11 5.51 6.22 6.65
BON-IHR   10.54 8.50 8.96 9.82 9.21 10.39 8.35 8.63 10.83 9.10 8.32 8.34 7.25 8.06 9.05
BON-LGR 14.35 16.45 12.87 14.62 18.44 14.89 16.26 13.40 15.20 20.41 15.53 13.93 14.45 13.62 13.17 16.56
BON-TDA                       2.07 2.02 1.56 1.91 2.66
BON-LMN                         9.86 8.89 9.53 10.89
BON-LGS                         12.76 10.55 11.62 14.29
TDA-MCN                       4.27 4.05 3.89 4.38 3.95
TDA-IHR                       6.28 6.29 5.65 6.27 6.46
TDA-LMN                         7.84 7.30 7.76 8.30
TDA-LGS                         10.74 8.94 9.85 11.77
TDA-LGR                       11.94 12.43 11.97 11.41 14.12
MCN-IHR   2.00 1.80 2.08 2.28 1.75 2.50 2.00 2.35 2.38 2.01 1.85 2.10 1.70 1.73 2.31
MCN-LGR 6.29 7.97 6.20 7.86 11.01 7.88 8.43 7.22 9.00 12.10 8.59 7.72 8.30 8.22 6.98 10.09
MCN-LMN                         3.66 3.52 3.33 4.17
MCN-LGS                         6.59 5.21 5.38 7.70
IHR-LGR   5.92 4.31 5.67 8.78 5.94 5.79 5.10 6.40 9.55 6.40 5.84 6.19 6.57 5.22 7.73
IHR-LMN                         1.53 1.84 1.56 1.81
IHR-LGS                         4.48 3.53 3.62 5.33
LMN-LGS                         2.79 1.56 1.97 3.35
LMN-LGR                         4.56 4.70 3.61 5.63
LGS-LGR                         1.73 2.94 1.60 1.99
Standard errors by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
BON-MCN 0.13 0.11 0.10 0.18 0.16 0.31 0.09 0.08 0.06 0.11 0.07 0.11 0.07 0.09 0.14 0.15
BON-IHR   0.12 0.11 0.18 0.19 0.23 0.11 0.09 0.08 0.11 0.09 0.13 0.11 0.09 0.16 0.18
BON-LGR 0.16 0.17 0.14 0.24 0.48 0.31 0.16 0.13 0.12 0.26 0.23 0.20 0.20 0.24 0.24 0.40
BON-TDA                       0.03 0.03 0.05 0.04 0.11
BON-LMN                         0.12 0.11 0.18 0.21
BON-LGS                         0.19 0.14 0.23 0.32
TDA-MCN                       0.10 0.06 0.08 0.12 0.08
TDA-IHR                       0.12 0.10 0.08 0.15 0.15
TDA-LMN                         0.11 0.10 0.17 0.18
TDA-LGS                         0.18 0.13 0.22 0.29
TDA-LGR                       0.19 0.20 0.23 0.23 0.38
MCN-IHR   0.04 0.04 0.05 0.11 0.11 0.05 0.04 0.05 0.06 0.04 0.05 0.08 0.04 0.03 0.09
MCN-LGR 0.07 0.12 0.08 0.16 0.42 0.19 0.12 0.09 0.10 0.23 0.20 0.15 0.17 0.21 0.15 0.35
MCN-LMN                         0.09 0.08 0.09 0.12
MCN-LGS                         0.16 0.11 0.13 0.25
IHR-LGR   0.11 0.07 0.14 0.42 0.17 0.10 0.08 0.09 0.23 0.19 0.14 0.15 0.21 0.13 0.33
IHR-LMN                         0.03 0.07 0.07 0.06
IHR-LGS                         0.14 0.10 0.12 0.23
LMN-LGS                         0.13 0.06 0.09 0.22
LMN-LGR                         0.14 0.18 0.10 0.30
LGS-LGR                         0.07 0.16 0.05 0.18
Counts by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
BON-MCN 1798 1815 1293 658 603 594 1692 2309 2595 2152 1533 1399 1567 1523 911 463
BON-IHR 0 1802 1277 644 507 548 1514 2195 2468 1999 1369 1255 1503 1456 839 438
BON-LGR 1798 1746 1271 621 418 499 1342 2098 2329 1899 1153 1075 1416 1285 766 401
BON-TDA 0 0 0 0 0 0 0 0 0 0 0 1652 1828 1878 1120 550
BON-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1499 1405 822 427
BON-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1455 1278 783 411
TDA-MCN 0 0 0 0 0 0 0 0 0 0 0 1403 1572 1573 916 472
TDA-IHR 0 0 0 0 0 0 0 0 0 0 0 1258 1510 1506 843 447
TDA-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1507 1455 827 436
TDA-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1461 1328 788 417
TDA-LGR 0 0 0 0 0 0 0 0 0 0 0 1077 1423 1333 771 403
MCN-IHR 0 1880 1344 666 519 547 1518 2210 2490 2021 1375 1259 1506 1500 843 446
MCN-LGR 1782 1809 1334 645 426 499 1346 2114 2350 1916 1158 1079 1418 1327 770 401
MCN-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1503 1449 826 434
MCN-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1458 1322 787 415
IHR-LGR 0 1824 1340 637 419 500 1338 2087 2324 1821 1151 1077 1411 1320 766 394
IHR-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1494 1442 821 426
IHR-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1447 1315 782 408
LMN-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1457 1323 784 407
LMN-LGR 0 0 0 0 0 0 0 0 0 0 0 0 1419 1331 766 393
LGS-LGR 0 0 0 0 0 0 0 0 0 0 0 0 1424 1269 771 401

Last Update: Mon Oct 16 18:59:02 2017

Data Courtesy of Pacific States Marine Fisheries Commission

The Snake River Spring/Summer Chinook ESU includes naturally spawned spring/summer-run Chinook salmon originating from the mainstem Snake River and the Tucannon River, Grande Ronde River, Imnaha River, and Salmon River subbasins. It also includes spring/summer-run Chinook salmon from 11 artificial propagation programs: Tucannon River Program, Lostine River Program, Catherine Creek Program, Lookingglass Hatchery Program, Upper Grande Ronde Program, Imnaha River Program, Big Sheep Creek Program, McCall Hatchery Program, Johnson Creek Artificial Propagation Enhancement Program, Pahsimeroi Hatchery Program, and Sawtooth Hatchery Program. Definition implemented by Columbia River DART: March 2015.