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Snake River Chinook Fall 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
LGR-LMN 13.50 13.50 10.40 11.48 7.48 6.90 19.67 12.56 17.49 10.09 13.22 11.57 8.11 9.48 7.83 8.71
LGR-IHR   18.56   18.86 16.54 9.60 25.00 15.39 16.19 12.09 18.49 11.24 11.48   12.11 23.09
LGR-MCN 18.82 15.66 15.62 17.29 13.07 11.54 16.95 13.14 10.48 13.55 13.64 12.95 12.30 14.31 11.00 12.17
LGR-JDA 20.87 18.19 16.19 20.61 14.14 15.04 21.35 17.40 12.48 16.37 16.39 18.21 16.22 20.49 14.33 16.45
LGR-BON 21.39 18.48 18.58 22.38 16.44 16.17 20.51 18.14 13.52 17.46 17.52 16.56 16.39 18.05 14.29 20.42
LGR-LGS 6.80 6.63 5.18 7.35 5.28 5.07 9.73 10.62 15.82 8.74 11.97 9.87   5.73 7.27 8.77
LGS-LGR                         -6.06      
LGS-LMN 7.05 7.11 5.32 4.34 2.86 3.35 6.63 5.02 4.85 4.84 4.49 6.99 3.72 4.99 3.54 2.16
LGS-IHR       7.92 6.34 4.75 14.04 8.23 7.32 7.45 8.33 11.01 6.08   8.08 6.27
LGS-MCN 12.73 11.11 10.47 9.95 7.62 7.34 11.80 9.28 7.79 8.87 8.63 10.38 8.83 11.52 8.29 8.36
LGS-JDA 14.53 12.96 11.72 12.98 9.94 11.28 15.11 13.31 10.14 12.38 11.67 17.44 11.98 16.96 11.35 10.63
LGS-BON 15.53 13.80 13.92 14.82 11.51 12.78 15.58 14.49 11.62 12.75 12.75 17.40 13.63 16.04 11.46 12.00
LGS-TDA                       17.01        
LMN-IHR   8.21   2.72 2.70 2.67 8.21 4.04 2.79 4.24 3.81 5.77 3.16   3.67 3.97
LMN-MCN 6.15 5.94 5.72 5.48 5.35 5.41 9.27 7.78 5.53 6.61 6.55 7.07 6.58 6.56 8.80 10.02
LMN-JDA 9.37 9.36 8.61 9.08 8.26 10.22 12.26 12.32 8.03 10.64 9.83 12.64 11.19 11.83 10.47 12.88
LMN-BON 10.72 10.19 10.03 10.60 9.86 10.43 13.79 13.81 10.68 11.44 11.63 14.18 11.45 12.95 11.23 13.22
IHR-MCN   5.26   3.24 3.30 3.14 5.05 4.99 3.10 3.76 4.46 4.40 4.22 3.77 5.75 6.95
IHR-JDA       6.28 6.40 7.90 9.31 10.01 6.65 7.30 7.94 10.14 8.98 9.09 8.22 10.17
IHR-BON       9.44 8.16 8.25 9.53 11.62 8.69 8.24 9.28 10.41 8.79 10.96 8.88 10.30
IHR-LGR                           -14.14    
IHR-LGS                           -10.44    
IHR-LMN                           -4.71    
IHR-TDA                       8.25        
MCN-JDA 4.36 4.37 4.13 4.12 3.50 4.85 4.64 5.94 4.50 5.25 4.64 6.07 6.08 5.96 4.85 5.96
MCN-BON 5.68 5.83 5.47 5.85 5.09 5.50 5.46 6.86 5.89 5.89 5.57 6.64 6.15 6.62 4.93 5.55
MCN-TDA                               4.33
JDA-BON 2.67 2.59 2.19 2.20 1.79 2.00 2.16 2.10 2.01 1.94 1.77 2.04 2.00 2.20 1.76 1.80
Standard errors by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
LGR-LMN 0.22 0.23 0.12 0.12 0.10 0.21 0.47 0.21 0.37 0.14 0.19 1.06 0.41 0.39 0.44 1.52
LGR-IHR   NA   0.74 0.60 0.36 0.69 0.32 0.48 0.23 0.35 0.94 1.04   0.79 12.22
LGR-MCN 0.36 0.16 0.17 0.15 0.23 0.17 0.18 0.10 0.17 0.10 0.13 0.29 0.25 0.43 0.26 1.58
LGR-JDA 0.32 0.25 0.21 0.18 0.15 0.21 0.29 0.21 0.18 0.13 0.11 0.57 0.45 0.48 0.54 2.91
LGR-BON 0.43 0.25 0.36 0.32 0.27 0.34 0.22 0.17 0.14 0.17 0.20 0.51 0.41 0.64 0.47 2.58
LGR-LGS 0.13 0.08 0.05 0.07 0.07 0.13 0.17 0.13 0.28 0.14 0.15 0.69   0.35 0.43 1.69
LGS-LGR                         0.34      
LGS-LMN 0.18 0.16 0.08 0.06 0.04 0.40 0.24 0.10 0.10 0.10 0.08 0.39 0.37 0.23 0.26 0.17
LGS-IHR       0.50 0.25 0.16 0.60 0.18 0.20 0.19 0.20 1.42 0.63   0.59 1.21
LGS-MCN 0.31 0.12 0.11 0.10 0.10 0.13 0.18 0.10 0.11 0.10 0.10 0.35 0.25 0.37 0.32 1.01
LGS-JDA 0.29 0.19 0.15 0.12 0.08 0.17 0.28 0.16 0.13 0.13 0.11 0.60 0.29 0.51 0.50 1.29
LGS-BON 0.40 0.20 0.24 0.21 0.12 0.27 0.23 0.16 0.13 0.14 0.15 0.69 0.67 0.78 0.39 1.30
LGS-TDA                       NA        
LMN-IHR   NA   0.16 0.11 0.21 0.30 0.09 0.08 0.10 0.13 0.37 0.32   0.23 0.11
LMN-MCN 0.10 0.07 0.09 0.08 0.08 0.21 0.16 0.11 0.09 0.06 0.09 0.22 0.12 0.33 0.24 0.24
LMN-JDA 0.13 0.20 0.15 0.11 0.10 0.31 0.22 0.19 0.11 0.08 0.10 0.26 0.16 0.47 0.17 0.18
LMN-BON 0.17 0.14 0.21 0.21 0.16 0.52 0.20 0.20 0.17 0.13 0.20 0.44 0.28 0.94 0.33 0.37
IHR-MCN   2.05   0.32 0.11 0.30 0.12 0.11 0.08 0.05 0.13 0.27 0.14 0.19 0.28 0.16
IHR-JDA       0.56 0.12 0.48 0.24 0.21 0.14 0.08 0.14 0.46 0.25 0.32 0.30 0.14
IHR-BON       2.13 0.25 0.52 0.17 0.25 0.21 0.12 0.26 0.60 0.36 0.54 0.38 0.33
IHR-LGR                           0.48    
IHR-LGS                           0.33    
IHR-LMN                           0.36    
IHR-TDA                       NA        
MCN-JDA 0.07 0.07 0.08 0.08 0.04 0.09 0.10 0.08 0.08 0.06 0.06 0.11 0.10 0.34 0.15 0.15
MCN-BON 0.08 0.07 0.09 0.10 0.12 0.11 0.09 0.08 0.05 0.07 0.09 0.14 0.14 0.16 0.09 0.12
MCN-TDA                               NA
JDA-BON 0.14 0.09 0.04 0.04 0.03 0.04 0.10 0.02 0.01 0.02 0.01 0.02 0.13 0.03 0.02 0.03
Counts by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
LGR-LMN 2565 2736 3716 3238 2584 336 2601 3933 3718 7567 5954 197 355 145 421 12
LGR-IHR 0 1 0 359 1150 243 1800 1829 1865 4148 2302 121 168 0 145 4
LGR-MCN 1789 3786 3092 2688 2028 933 2695 4243 2032 5328 3355 501 448 148 339 12
LGR-JDA 655 1323 865 1231 1421 711 1364 1365 1594 3530 4060 225 273 113 283 10
LGR-BON 317 841 288 377 914 268 1500 1516 1296 1468 1377 138 141 57 130 10
LGR-LGS 3448 7142 8829 6836 4545 891 4576 9551 6626 9818 11504 555 0 536 1231 47
LGS-LGR 0 0 0 0 0 0 0 0 0 0 0 0 830 0 0 0
LGS-LMN 3171 3625 4790 4493 5292 435 2986 3617 7262 7914 5606 387 444 143 368 14
LGS-IHR 0 0 0 418 2077 270 1584 1827 3257 4104 2106 144 206 0 131 6
LGS-MCN 2024 4338 4074 3691 3697 1176 2492 3182 3616 5078 3152 577 506 133 274 15
LGS-JDA 846 1485 1298 1542 2748 832 1351 1372 2821 3420 3577 338 304 110 223 12
LGS-BON 373 972 419 489 1565 350 1476 1286 1998 1474 1371 182 183 53 101 11
LGS-TDA 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
LMN-IHR 0 1 0 194 1761 198 1706 1514 3168 5438 2094 282 273 0 217 746
LMN-MCN 2641 2717 2350 2001 2366 494 2086 2595 2842 6856 2636 775 1087 86 580 611
LMN-JDA 1028 723 583 864 1894 462 1109 1199 2575 5296 3338 726 832 82 653 928
LMN-BON 532 554 216 253 1072 136 1129 1012 1450 1805 910 308 263 37 225 188
IHR-MCN 0 2 0 285 1338 399 1946 2460 1899 4395 1299 486 523 248 348 840
IHR-JDA 0 0 0 102 1026 284 1027 1035 1833 3397 1513 311 340 242 396 1120
IHR-BON 0 0 0 26 594 121 960 898 1121 1072 415 162 142 119 120 219
IHR-LGR 0 0 0 0 0 0 0 0 0 0 0 0 0 128 0 0
IHR-LGS 0 0 0 0 0 0 0 0 0 0 0 0 0 138 0 0
IHR-LMN 0 0 0 0 0 0 0 0 0 0 0 0 0 81 0 0
IHR-TDA 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
MCN-JDA 992 1601 612 750 1964 1265 2174 2438 2437 4298 3147 1475 1438 297 1145 1005
MCN-BON 470 1336 220 251 1235 470 2142 2498 2543 1678 1154 730 554 279 412 261
MCN-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
JDA-BON 241 529 80 152 956 410 1376 1160 1978 1416 1265 608 427 271 647 341

Last Update: Wed Oct 18 18:59:02 2017

Data Courtesy of Pacific States Marine Fisheries Commission

The Snake River Fall Chinook ESU includes naturally spawned fall-run Chinook salmon originating from the mainstem Snake River below Hells Canyon Dam and from the Tucannon River, Grande Ronde River, Imnaha River, Salmon River, and Clearwater River subbasins. Also, fall-run Chinook salmon from four artificial propagation programs: Lyons Ferry Hatchery Program, Fall Chinook Acclimation Ponds Program, Nez Perce Tribal Hatchery Program, and Oxbow Hatchery Program. Definition implemented by Columbia River DART: June 2007.