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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 2018
BON-MCN 7.78 8.43 6.57 6.77 7.61 7.42 7.72 6.22 6.15 8.30 7.01 6.36 6.11 5.52 6.25 6.61 6.80
BON-LGR 14.35 16.45 12.87 14.58 18.46 14.76 16.27 13.34 15.18 20.38 15.53 13.96 14.45 13.61 13.19 16.54 15.79
BON-TDA                       2.07 2.02 1.56 1.91 2.63 2.56
BON-IHR   10.54 8.50 8.95 9.83 9.13 10.41 8.32 8.64 10.83 9.11 8.33 8.34 7.26 8.11 9.01 9.08
BON-LMN                         9.85 8.89 9.55 10.84 10.91
BON-LGS                         12.76 10.55 11.63 14.24 13.95
BON-JDA                                 4.26
TDA-MCN                       4.28 4.05 3.89 4.41 3.95 4.14
TDA-IHR                       6.30 6.29 5.65 6.31 6.45 6.45
TDA-LMN                         7.83 7.30 7.77 8.30 8.29
TDA-LGS                         10.73 8.94 9.86 11.76 11.31
TDA-LGR                       11.96 12.42 11.97 11.43 14.10 13.13
TDA-JDA                                 1.58
JDA-MCN                                 2.54
JDA-IHR                                 4.88
JDA-LMN                                 6.69
JDA-LGS                                 9.73
JDA-LGR                                 11.50
MCN-LGR 6.29 7.97 6.20 7.86 11.02 7.82 8.39 7.16 8.98 12.08 8.58 7.72 8.30 8.22 6.99 10.07 8.88
MCN-IHR   2.00 1.80 2.08 2.27 1.74 2.48 1.98 2.35 2.38 2.01 1.86 2.10 1.70 1.74 2.31 2.16
MCN-LMN                         3.66 3.52 3.34 4.17 3.98
MCN-LGS                         6.58 5.21 5.39 7.70 7.04
IHR-LMN                         1.53 1.84 1.57 1.81 1.76
IHR-LGS                         4.48 3.53 3.62 5.33 4.85
IHR-LGR   5.92 4.31 5.64 8.80 5.89 5.77 5.07 6.38 9.54 6.40 5.84 6.19 6.56 5.23 7.72 6.69
LMN-LGS                         2.79 1.56 1.97 3.35 2.97
LMN-LGR                         4.56 4.69 3.61 5.62 4.79
LGS-LGR                         1.73 2.94 1.61 1.99 1.70
Standard errors by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
BON-MCN 0.13 0.11 0.10 0.17 0.16 0.30 0.09 0.07 0.06 0.11 0.07 0.11 0.07 0.09 0.14 0.15 0.11
BON-LGR 0.16 0.17 0.14 0.24 0.47 0.30 0.16 0.13 0.12 0.26 0.23 0.20 0.20 0.24 0.24 0.40 0.32
BON-TDA                       0.03 0.03 0.05 0.04 0.10 0.05
BON-IHR   0.12 0.11 0.17 0.19 0.22 0.11 0.09 0.08 0.11 0.09 0.13 0.11 0.09 0.16 0.18 0.13
BON-LMN                         0.12 0.11 0.18 0.21 0.17
BON-LGS                         0.19 0.14 0.22 0.32 0.28
BON-JDA                                 0.09
TDA-MCN                       0.10 0.06 0.08 0.12 0.08 0.08
TDA-IHR                       0.12 0.10 0.08 0.15 0.15 0.11
TDA-LMN                         0.11 0.10 0.17 0.18 0.15
TDA-LGS                         0.18 0.13 0.22 0.29 0.26
TDA-LGR                       0.19 0.20 0.23 0.23 0.38 0.30
TDA-JDA                                 0.06
JDA-MCN                                 0.05
JDA-IHR                                 0.09
JDA-LMN                                 0.13
JDA-LGS                                 0.25
JDA-LGR                                 0.29
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 0.27
MCN-IHR   0.04 0.03 0.05 0.11 0.10 0.05 0.04 0.04 0.06 0.04 0.05 0.08 0.04 0.03 0.09 0.05
MCN-LMN                         0.09 0.08 0.09 0.12 0.10
MCN-LGS                         0.16 0.11 0.13 0.25 0.23
IHR-LMN                         0.03 0.07 0.07 0.06 0.08
IHR-LGS                         0.14 0.10 0.12 0.23 0.22
IHR-LGR   0.11 0.07 0.14 0.41 0.17 0.10 0.08 0.09 0.23 0.19 0.13 0.15 0.21 0.13 0.33 0.26
LMN-LGS                         0.13 0.06 0.09 0.22 0.19
LMN-LGR                         0.14 0.18 0.10 0.30 0.22
LGS-LGR                         0.07 0.16 0.05 0.18 0.08
Counts by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
BON-MCN 1798 1815 1296 670 611 615 1751 2381 2648 2161 1539 1407 1573 1530 914 464 491
BON-LGR 1798 1746 1274 633 423 521 1393 2169 2380 1907 1159 1079 1420 1291 768 403 398
BON-TDA 0 0 0 0 0 0 0 0 0 0 0 1661 1835 1887 1123 551 626
BON-IHR 0 1802 1280 656 514 569 1568 2266 2521 2006 1375 1262 1509 1463 842 439 459
BON-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1503 1411 824 428 438
BON-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1459 1283 785 412 414
BON-JDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 551
TDA-MCN 0 0 0 0 0 0 0 0 0 0 0 1411 1578 1580 919 473 491
TDA-IHR 0 0 0 0 0 0 0 0 0 0 0 1265 1516 1513 846 448 459
TDA-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1511 1461 829 437 436
TDA-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1465 1333 790 418 413
TDA-LGR 0 0 0 0 0 0 0 0 0 0 0 1081 1427 1339 773 405 397
TDA-JDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 551
JDA-MCN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 493
JDA-IHR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 461
JDA-LMN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 438
JDA-LGS 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 416
JDA-LGR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 401
MCN-LGR 1782 1809 1337 656 431 519 1398 2186 2402 1925 1164 1083 1422 1333 772 403 401
MCN-IHR 0 1880 1347 678 526 566 1573 2282 2544 2029 1381 1266 1512 1507 846 447 463
MCN-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1507 1455 828 435 440
MCN-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1462 1327 789 416 417
IHR-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1498 1448 823 427 436
IHR-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1451 1320 784 409 414
IHR-LGR 0 1824 1343 649 424 521 1390 2159 2376 1828 1157 1081 1415 1326 768 396 398
LMN-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1460 1328 786 408 410
LMN-LGR 0 0 0 0 0 0 0 0 0 0 0 0 1422 1337 768 395 395
LGS-LGR 0 0 0 0 0 0 0 0 0 0 0 0 1427 1274 773 403 401

Last Update: Sat Feb 16 18:59:02 2019

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.