Lower Granite Bypass and Spillway Analyses

Data Courtesy of Pacific States Marine Fisheries Commission

PIT Tag Lower Granite Bypass and Spillway Analysis

Lower Granite Bypass and Spillway Juvenile and Adult Daily Summary

Last Update: July 02 2025 07:25:25.
2025 Lower Granite Spillway (GRS) and Bypass (GRJ) Juvenile and Adult Daily Detection Summary
Water and Fish daily averages and totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date Spill Conditions Juveniles Adults
Outflow
(daily avg)
kcfs
Spill
(daily avg)
kcfs
Spill Hours
All Bays
Spill Hours
Spillbay 1
Percent Spill
in
Spillbay 1
Chinook Steelhead Coho Sockeye Chinook Steelhead Coho Sockeye
Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ)
Calendar Date Spill Conditions Juveniles Adults
Outflow
(daily avg)
kcfs
Spill
(daily avg)
kcfs
Spill Hours
All Bays
Spill Hours
Spillbay 1
Percent Spill
in
Spillbay 1
Chinook Steelhead Coho Sockeye Chinook Steelhead Coho Sockeye
Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ) Spillway (GRS)Bypass (GRJ)
YTD Total     5631310875713421534814581651008391760244243    
2025-07-0139.718.32400.044293 1           
2025-06-3040.918.32400.0491861            
2025-06-2938.318.42400.077664             
2025-06-2838.918.12400.0255689 2   1 2     
2025-06-2739.918.02400.03297018 1           
2025-06-2639.418.22400.079561113     1     
2025-06-2539.718.42400.051421013   1       
2025-06-2441.318.12400.0953215251  1       
2025-06-2341.818.12400.013777731   1       
2025-06-2239.217.92400.02927923 3   1       
2025-06-2139.218.52400.06666556 31  2       
2025-06-2039.927.22400.0239481917     1     
2025-06-1944.031.32400.03442570 1111   1     
2025-06-1842.629.92443.51951344 14     1     
2025-06-1746.834.1242418.01381957 13   1 1     
2025-06-1650.137.3242416.5991454 21    1     
2025-06-1554.842.1242414.2128114928  11       
2025-06-1458.846.0242413.3107187919           
2025-06-1361.949.0242412.61121474211   111     
2025-06-1264.752.0242412.22072052 8 1   3     
2025-06-1168.355.5242411.31951292115     2     
2025-06-1069.256.5242411.6137674112   1       
2025-06-0968.655.8242411.817012133213   1       
2025-06-0862.950.1242412.8137736 6           
2025-06-0763.150.2242412.61821155324   3 1     
2025-06-0665.953.2242411.61251013529   1 1     
2025-06-0570.056.9242410.71029421064   5 1     
2025-06-0477.064.024249.82051180 3   3       
2025-06-0385.172.424248.71932815020713   2 1     
2025-06-0290.977.124247.915826100781  3 11    
2025-06-01101.779.724247.91953747915734   3 41    
2025-05-31103.979.824247.9299454151611   3 3     
2025-05-30105.880.324248.13577419413415   1 6     
2025-05-29100.480.224248.1373713631412   1 6     
2025-05-2892.379.524248.2315105193598     6     
2025-05-2782.469.724248.98031734286131    7     
2025-05-2675.763.0242410.556466494813     9     
2025-05-2569.256.7242411.46072081413212     4     
2025-05-2470.257.4242410.56561021591111 1 1 5     
2025-05-2370.457.8242410.748237477938   1161    
2025-05-2269.657.0242410.9281344363557 113 4     
2025-05-2172.559.8242410.0364566243038111  6     
2025-05-2077.864.924249.34795747422936 5 1 7     
2025-05-1980.267.424249.43896020263316 1       
2025-05-1874.561.924249.5281592011923211911 11    
2025-05-1786.073.324248.52766530717162345  3     
2025-05-1685.071.924248.332546227817221101111 3     
2025-05-1594.578.724248.23147941819201388712 4     
2025-05-14109.777.824248.265227480367437359003972       
2025-05-13113.780.124247.593144481981829318892122 41    
2025-05-12120.283.024247.4913415116130560116702022 81    
2025-05-11115.484.224247.220232839701245836515  21    
2025-05-10103.483.924247.32637811104253502    5     
2025-05-0995.482.424247.34533665144426   1 1     
2025-05-0886.974.124248.2710581511448381  2 51    
2025-05-0788.175.424248.41386212218432271  1 4     
2025-05-0689.476.724247.81571611167456301  2 6     
2025-05-0598.983.924247.416391051922114542    11    
2025-05-0491.779.124247.9117379242196321    6     
2025-05-0384.271.524248.89631451020633194    8     
2025-05-0280.567.824249.319351582331580451    13     
2025-05-0179.867.224249.030671821832389362    61    
2025-04-3083.370.724248.94200185283942989     161    
2025-04-2982.169.824249.726072262540352403    8     
2025-04-2872.159.5242410.9261483262864291    12     
2025-04-2765.853.4242412.22089124252510720     9     
2025-04-2667.354.7242412.419241735361204121    9     
2025-04-2562.349.6242412.4176729941365322     7     
2025-04-2467.855.1242411.31061329370783714     6     
2025-04-2373.160.4242410.47758314116461    11     
2025-04-2270.957.9242410.5598661667827     81    
2025-04-2175.362.724249.4557641277771     8     
2025-04-2081.068.324249.1326862384522 1   4     
2025-04-1985.172.424248.3495891304571     2     
2025-04-1889.176.124248.139483581673     4     
2025-04-1789.877.024247.929525111429122     6     
2025-04-1689.476.624248.430441149571      6     
2025-04-1586.273.524248.836962155476      6     
2025-04-1491.078.324248.446769404721     5     
2025-04-1390.477.824248.626835100275      4     
2025-04-1288.675.624248.32293967762      2     
2025-04-1181.068.524249.514325173587      8     
2025-04-1078.065.424249.93182548877      4     
2025-04-0977.564.924249.9143291215831     21    
2025-04-0870.357.6242410.61041920327      3     
2025-04-0768.355.7242410.9231422802431    21    
2025-04-0668.555.9242411.2982548171     51    
2025-04-0569.657.1242411.267445916            
2025-04-0471.558.9242410.950574232      2     
2025-04-0371.458.7242410.59381163972     5     
2025-04-0273.66.6242499.011141215447024    53    
2025-04-0178.06.42424100.01335141716221411    35    
2025-03-3179.47.02424100.021210241516472223    71    
2025-03-3090.36.92424100.030410691784082829    83    
2025-03-2995.97.92424100.144214211752141    33    
2025-03-2893.38.42424100.011518233583012    33    
2025-03-2790.09.5242499.957551527      42    
2025-03-2675.59.62424100.12481418      51    
2025-03-2559.18.9242499.8288146      5     
2025-03-2456.38.52424100.09629      4     
2025-03-2356.29.3242499.9111        3     
2025-03-2253.99.1242499.921        3     
2025-03-2150.19.22424100.012        1     
2025-03-2046.41.85699.81         12    
2025-03-1954.61.95499.9 4 1      41    
2025-03-1853.11.954100.2 1 1      4     
2025-03-1755.61.75499.322 1       1    
2025-03-1648.31.755100.331        1     
2025-03-1549.81.75599.62  1      21    
2025-03-1453.81.755100.231 1            
2025-03-1354.01.854100.41  1      22    
2025-03-1251.22.166100.014211           
2025-03-1145.81.96699.7          2     
2025-03-1048.21.96699.9          2     
2025-03-0948.82.266100.0                
2025-03-0845.02.26699.6  1       3     
2025-03-0744.72.066100.01         1     
2025-03-0646.32.25699.9          1     
2025-03-0553.42.156100.01         6     
2025-03-0451.22.04599.9          5     
2025-03-0350.12.25599.7          2     
2025-03-0249.32.25599.61         4     
2025-03-0147.92.25599.8          12     
2025-02-2847.90.0000.0                
2025-02-2741.70.0000.0                
2025-02-2653.20.0000.0                
2025-02-2557.20.0000.0                
2025-02-2456.70.0000.0                
2025-02-2333.60.0000.0                
2025-02-2232.20.0000.0                
2025-02-2132.50.0000.0                
2025-02-2028.30.0000.0                
2025-02-1923.00.0000.0                
2025-02-1820.00.0000.0                
2025-02-1731.50.0000.0                
2025-02-1631.90.0000.0                
2025-02-1526.60.0000.0                
2025-02-1426.70.0000.0                
2025-02-1333.30.0000.0                
2025-02-1235.50.0000.0                
2025-02-1139.30.0000.0                
2025-02-1033.30.0000.0                
2025-02-0935.70.0000.0                
2025-02-0833.00.0000.0                
2025-02-0729.40.0000.0                
2025-02-0623.70.0000.0                
2025-02-0530.80.0000.0                
2025-02-0431.60.0000.0                
2025-02-0332.00.0000.0                
2025-02-0227.20.0000.0                
2025-02-0132.20.0000.0                
2025-01-3126.60.0000.0                
2025-01-3025.20.0000.0                
2025-01-2924.70.0000.0                
2025-01-2827.00.0000.0                
2025-01-2729.50.0000.0                
2025-01-2628.00.0000.0                
2025-01-2527.40.0000.0                
2025-01-2427.80.0000.0                
2025-01-2328.10.0000.0                
2025-01-2229.50.0000.0                
2025-01-2128.90.0000.0                
2025-01-2031.60.0000.0                
2025-01-1930.50.0000.0                
2025-01-1834.40.0000.0                
2025-01-1732.30.0000.0                
2025-01-1630.20.0000.0                
2025-01-1532.60.0000.0                
2025-01-1435.10.0000.0                
2025-01-1334.10.0000.0                
2025-01-1238.30.0000.0                
2025-01-1135.80.0000.0                
2025-01-1035.10.0000.0                
2025-01-0936.60.0000.0                
2025-01-0840.70.0000.0                
2025-01-0739.80.0000.0                
2025-01-0635.00.0000.0                
2025-01-0535.60.0000.0                
2025-01-0432.70.0000.0                
2025-01-0332.10.0000.0                
2025-01-0230.90.0000.0                
2025-01-0127.40.0000.0                

Lower Granite Bypass and Spillway Juvenile Downstream Detections Summary by Species

Last Update: July 02 2025 07:26:25.

2025 Juvenile Chinook Downstream Detections
Fish daily totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date Spillway and then Downstream, Unique TagIDs Detected Bypass and then Downstream, Unique TagIDs Detected
Spillway (GRS) Little Goose Lower Monumental Ice Harbor McNary John Day Bonneville Bypass (GRJ) Little Goose Lower Monumental Ice Harbor McNary John Day Bonneville
YTD Total563131604365537117961526981087546393177193164207
2025-07-014414341  291311 1
2025-06-304913421 118121   
2025-06-29771436212662 11 2
2025-06-282551021342 68311   
2025-06-27329211711 703 3 1 
2025-06-2679182121  567     
2025-06-255113313 2 423     
2025-06-2495284132  325     
2025-06-2313727371  77721  1
2025-06-2229210 8 2 79211   
2025-06-21666925 1165 1    
2025-06-20239412 3148      
2025-06-193444111 225      
2025-06-181954 126413      
2025-06-171388 1132191  1  
2025-06-169952521614      
2025-06-15128526 1 113     
2025-06-14107541133181     
2025-06-13112552 1314    1 
2025-06-12207112 4120      
2025-06-111951 1 1312      
2025-06-1013711 1156      
2025-06-0917033154112   11 
2025-06-081377  3477  2 12
2025-06-07182431361111      
2025-06-06125211562110  1  4
2025-06-05102822812359 1  12
2025-06-042054 353127111  111
2025-06-031931 28212028  2121
2025-06-021582231281126 1 2 2
2025-06-0119584315513371   21
2025-05-3129958713810451 111 
2025-05-3035777183574  1  1
2025-05-2937313158410712 1  1
2025-05-28315118513 3105   21 
2025-05-278032546101217341 12 
2025-05-265648754416611113 
2025-05-2560761247615208  1112
2025-05-246563339311102   11 
2025-05-2348215341110103722 211
2025-05-22281183254213431  13
2025-05-2136422151111026562 121 
2025-05-2047918762214895711 222 
2025-05-1938938 5241353603 132 
2025-05-182812653473056597112  
2025-05-172762447452051654 3   
2025-05-16325243186810664682    
2025-05-1531414619312090793   11
2025-05-14652281622231899274611 11
2025-05-139316414108211334448    4
2025-05-129134410717161694152 1 14
2025-05-112023287427322582831 2 14
2025-05-102637846132637581   1 6
2025-05-09453746231728536   1 8
2025-05-08710868831820058  1155
2025-05-0713866412742713621   224
2025-05-06157173236898961   3 8
2025-05-051639225167112771051  119
2025-05-04117334311947134479 2 257
2025-05-03963479335513251451 341010
2025-05-0219352510928614158112316
2025-05-0130674971816921182 1141111
2025-04-3042004113926101218521 3110
2025-04-29260715210111610102264 1599
2025-04-282614785522188834 2849
2025-04-27208942221211312471 478
2025-04-261924211310581733 2688
2025-04-25176722 1964299612346
2025-04-24106124151462329711357
2025-04-2377533131315838124103
2025-04-225981634722667 2674
2025-04-215573535633648214114
2025-04-2032628274 1861012215
2025-04-19495431641 893 5632
2025-04-18394242551 83544627
2025-04-1729513147 1251723431
2025-04-163041565 141 3942 
2025-04-1536962121262126614
2025-04-1446723411269 11941 
2025-04-132682 3  235 210124
2025-04-1222951 1 1393513412
2025-04-111433 2   2532138 1
2025-04-103182  5 1257410122 
2025-04-0914342 43129135355 
2025-04-081044 141119143193 
2025-04-072313 13 242175352 
2025-04-06981  3 22571223 
2025-04-05674 143 4471 61 
2025-04-04504  52 5714 191 
2025-04-03933  32 81151 2  
2025-04-0211119257  41249853  
2025-04-011332345 1 514604121  
2025-03-312127712  10242642   
2025-03-303041753   10691322   
2025-03-29441522   2141811   
2025-03-281158     182      
2025-03-275731    551     
2025-03-26241     82     
2025-03-2528      8      
2025-03-249   1  6      
2025-03-2311      1      
2025-03-2221     1      
2025-03-211      2      
2025-03-201 1           
2025-03-19       4      
2025-03-18       1      
2025-03-172      2      
2025-03-163      1      
2025-03-152             
2025-03-143      1      
2025-03-131             
2025-03-121      4      
2025-03-11              
2025-03-10              
2025-03-09              
2025-03-08              
2025-03-071             
2025-03-06              
2025-03-051             
2025-03-04              
2025-03-03              
2025-03-021             

2025 Juvenile Steelhead Downstream Detections
Fish daily totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date Spillway and then Downstream, Unique TagIDs Detected Bypass and then Downstream, Unique TagIDs Detected
Spillway (GRS) Little Goose Lower Monumental Ice Harbor McNary John Day Bonneville Bypass (GRJ) Little Goose Lower Monumental Ice Harbor McNary John Day Bonneville
YTD Total7134228281055169974362557001534869913014031668264
2025-07-013 1  1        
2025-06-306  1 111      
2025-06-294     2       
2025-06-2891    6       
2025-06-2718    12       
2025-06-2611    131      
2025-06-25101 2 131      
2025-06-2415113 232      
2025-06-2371 2  33      
2025-06-22231 31 1       
2025-06-215611   2       
2025-06-2019     101      
2025-06-19702   14       
2025-06-1844 12  7       
2025-06-175711 4         
2025-06-1654115 17       
2025-06-15492 31 42      
2025-06-1479 11  21      
2025-06-1374111  12      
2025-06-12521    2       
2025-06-11921 1  51      
2025-06-1074  1  21      
2025-06-091331   152      
2025-06-0836 1  47       
2025-06-0755 2 2 1032      
2025-06-061351 31272      
2025-06-05421 62113106      
2025-06-04803231 26      1
2025-06-031501441220207     2
2025-06-021006441 327    1 
2025-06-014792365223157   1  
2025-05-314151558 2316      
2025-05-30194267728134  1   
2025-05-29363464131814     1
2025-05-2819334491759      
2025-05-2742821105356      
2025-05-2649464142148     1
2025-05-25141410922532 1    
2025-05-241598103321011 1   1
2025-05-23477176583119   1  
2025-05-22436136821027355  1 12
2025-05-2162411885625301    1
2025-05-20474811112142522911  1 
2025-05-192021841491221621  2 
2025-05-18201651451759192  2 1 
2025-05-17307222022916148172 2  1
2025-05-1622719612820121817 1   2
2025-05-1541813292281412219 32  2
2025-05-14803222414515187674231  6
2025-05-138195863264143448186 1  10
2025-05-121161764037141539130522   12
2025-05-11970654854817550124  1  9
2025-05-1011045533444283782532 1  6
2025-05-09651351355533370444  1 14
2025-05-0815114917531616299448132 12
2025-05-0722183929502535267432121 36
2025-05-06116785331042924484456114  12
2025-05-05192278338029345311143  2111
2025-05-04242119347774021238965 2115
2025-05-03102069429447211256334125 8
2025-05-0223311353893441977580114123
2025-05-01183212336115291074389 11224
2025-04-302839815096221360429111425
2025-04-2925401721637381442352 1 315
2025-04-28262825215351817446462 3 4
2025-04-2725251041228182244107211233
2025-04-265361941925171050204412113
2025-04-254136762221171642532314118
2025-04-243707322930241349837 1 622
2025-04-2314111052246201649643151337
2025-04-221667104183715203982311625
2025-04-21127751213017937774 5713
2025-04-2023844618287318524632 3
2025-04-191304473334541357624553
2025-04-18581722623651867465436
2025-04-171142392124134912541537
2025-04-16149591422227711493413
2025-04-151554139142287646 4419
2025-04-1440419119216723216327
2025-04-131002956117752133312
2025-04-1267710677 3623287211
2025-04-1117357123 187244911
2025-04-1048852583 77249271 
2025-04-09121555625  835158053
2025-04-0820311416112745640 1
2025-04-0728022111 12436830  
2025-04-064852351 1774814  
2025-04-055912111 1610256 1
2025-04-044281 1  3214115  
2025-04-03163232 11 9750324  
2025-04-021546643   4702661461  
2025-04-011717242   6221808211 
2025-03-3115174    647418 1  
2025-03-301781031   40882    
2025-03-292163    17572    
2025-03-283361    584     
2025-03-2715      272     
2025-03-2614      181     
2025-03-2514      6  2   
2025-03-242      9      
2025-03-23              
2025-03-22         1    
2025-03-21        1     
2025-03-20              
2025-03-19       1      
2025-03-18       1      
2025-03-17       1      
2025-03-16              
2025-03-15       1      
2025-03-14       1      
2025-03-13       1      
2025-03-122      1      
2025-03-11              
2025-03-10              
2025-03-09              
2025-03-081             

2025 Juvenile Coho Downstream Detections
Fish daily totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date Spillway and then Downstream, Unique TagIDs Detected Bypass and then Downstream, Unique TagIDs Detected
Spillway (GRS) Little Goose Lower Monumental Ice Harbor McNary John Day Bonneville Bypass (GRJ) Little Goose Lower Monumental Ice Harbor McNary John Day Bonneville
YTD Total14581261116881165113 24
2025-07-011             
2025-06-30  1           
2025-06-29              
2025-06-282             
2025-06-271             
2025-06-263  1          
2025-06-253             
2025-06-245  1   1      
2025-06-231             
2025-06-223             
2025-06-213     21      
2025-06-207             
2025-06-1911      1      
2025-06-1814     1       
2025-06-1713             
2025-06-162      1      
2025-06-158             
2025-06-149 1           
2025-06-1311     1       
2025-06-128             
2025-06-1115   1         
2025-06-1012             
2025-06-0913             
2025-06-086    1        
2025-06-074             
2025-06-069     1       
2025-06-054     1       
2025-06-043             
2025-06-0313             
2025-06-028     11      
2025-06-0134     2       
2025-05-3111     2       
2025-05-3015 1 122       
2025-05-2912     1      1
2025-05-288   1         
2025-05-2713      1      
2025-05-2613  1  1       
2025-05-2512     1       
2025-05-24111 1          
2025-05-233811  1        
2025-05-227     2       
2025-05-2138   1111      
2025-05-2036  1  1       
2025-05-1933  1  11     1
2025-05-1832     11      
2025-05-1716  11122      
2025-05-1622  11 41      
2025-05-15201  1 61      
2025-05-1437 2   53     1
2025-05-1329   1 63      
2025-05-1260  11161      
2025-05-1158     73      
2025-05-1050   1 92      
2025-05-0926   1 5       
2025-05-0838   2 61      
2025-05-0727   1  1  1   
2025-05-0630     31 1   1
2025-05-05541     2      
2025-05-0432   1  1  1 1 
2025-05-03192     4      
2025-05-0245      1      
2025-05-0136      2      
2025-04-3089             
2025-04-2940  1   3      
2025-04-2829      1      
2025-04-27201            
2025-04-2612  1 1 1      
2025-04-2521          1 
2025-04-2414             
2025-04-236   1  1  1   
2025-04-227             
2025-04-211             
2025-04-202             
2025-04-191             
2025-04-183             
2025-04-172             
2025-04-16              
2025-04-15              
2025-04-141             
2025-04-13              
2025-04-12              
2025-04-11        1     
2025-04-10              
2025-04-091             
2025-04-08              
2025-04-0731     1      
2025-04-061             
2025-04-05              
2025-04-04              
2025-04-032             
2025-04-022      4      
2025-04-01143     11      
2025-03-3122      23      
2025-03-3028      29      
2025-03-2921      41      
2025-03-2830      12      
2025-03-27              
2025-03-26              
2025-03-25              
2025-03-24              
2025-03-23              
2025-03-22              
2025-03-21              
2025-03-20              
2025-03-19              
2025-03-18              
2025-03-17              
2025-03-16              
2025-03-15              
2025-03-14              
2025-03-13              
2025-03-121             

2025 Juvenile Sockeye Downstream Detections
Fish daily totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date Spillway and then Downstream, Unique TagIDs Detected Bypass and then Downstream, Unique TagIDs Detected
Spillway (GRS) Little Goose Lower Monumental Ice Harbor McNary John Day Bonneville Bypass (GRJ) Little Goose Lower Monumental Ice Harbor McNary John Day Bonneville
YTD Total10083625048190606491711 411
2025-06-191             
2025-06-18              
2025-06-17              
2025-06-16              
2025-06-15       1      
2025-06-14              
2025-06-13              
2025-06-121             
2025-06-11              
2025-06-10     1        
2025-06-09     1        
2025-06-08              
2025-06-07              
2025-06-06    11        
2025-06-05              
2025-06-04     1        
2025-06-03    131       
2025-06-02    11        
2025-06-01    131       
2025-05-31     2        
2025-05-30    12        
2025-05-29   1311       
2025-05-28    312       
2025-05-27    75        
2025-05-26  13661       
2025-05-25    1067       
2025-05-241  121511    11 
2025-05-23  1 2254       
2025-05-221   254131   1 1
2025-05-2111 2285101      
2025-05-20515316411    2  
2025-05-19653112222       
2025-05-1819391091 1 1    
2025-05-1734129210  5      
2025-05-161011815122  11      
2025-05-153887611  711     
2025-05-145900812   397      
2025-05-1318896     212      
2025-05-1216701     202      
2025-05-1165      15      
2025-05-10              
2025-05-09              
2025-05-08              
2025-05-07              
2025-05-06              
2025-05-05              
2025-05-04              
2025-05-03              
2025-05-02              
2025-05-01              
2025-04-30              
2025-04-29              
2025-04-28              
2025-04-27              
2025-04-26              
2025-04-25              
2025-04-24              
2025-04-23              
2025-04-22              
2025-04-21              
2025-04-201             
Query Notes