Table 10. — Average returns of chlnook salmon before Bonneville 

 Dam (1928-19^1) and after (1942-135*0 In pounds. 



Season 



Spring (January-May) 

 Summer (June- July) 

 Fall (August-December) 



Before 

 3,540,000 

 5,053,000 

 13,909,000 



After 

 3,884,000 

 1,578,000 

 14,045,000 



Total 



22,502,000 



19,507,000 



Table ll.--Escapementl/_a-.d return of Columbia River Chinook salmon for 

 three seasons each year. 



Escapement in 1000 's of pounds 

 Year Spring Summer Fall Annual 



1928 

 1929 

 1930 

 1931 

 1932 

 1933 

 193^ 

 1935 

 1936 

 1937 

 1938 



1939 

 i94o 

 1941 

 1942 

 1943 

 1944 



1945 

 1946 



1947 

 1948 

 1949 

 1950 



1,066 



898 



882 



789 



1,952 



2,197 



1,441 



2,004 



1,964 



2,026 



1,894 



1,405 



129 



691 



522 



1,584 



701 



1,745 



1,853 



2,462 



2,039 

 2,443 

 1,628 



784 



1,364 



642 



683 



2,047 



1,882 



488 



1,150 



837 



797 



613 



615 



208 



673 

 735 

 794 

 735 

 277 

 283 

 547 

 43Q 

 378 

 1,342 



1,256 

 1,107 

 4,471 

 6,726 

 5,397 

 1,205 



2,945 

 5,764 

 1,801 

 2,881 



2,565 

 3,704 



3,243 

 7,108 



3,037 

 3,268 

 5,724 

 5,865 

 3,659 

 4,342 

 ^,754 

 2,389 

 2,483 



3,106 

 3,379 

 5,995 

 8,198 

 9,396 

 5,284 

 4,874 

 8,918 

 4,602 

 5,704 

 5,072 

 5,713 

 3,580 

 8,471 



9,295 

 5,646 

 7,161 

 7,888 

 5,795 

 7,350 

 7,232 

 5,210 

 5,4>3 



Return in 1000 's of pounds 

 Year Spring Summer Fall Annual 



1932 

 1933 

 1934 

 1935 

 1936 

 1937 

 1938 

 1939 

 1940 

 1941 

 1942 



1943 

 1944 



1945 

 1946 

 1947 

 1948 



1949 

 1950 

 1951 

 1952 

 1953 

 l?54 



^,519 

 3,808 



3,079 

 ^,554 

 4,075 

 5,446 

 3,628 

 3,034 

 921 

 2,l6o 

 1,632 

 2,917 

 1,730 



3,3U 

 3,083 

 3,736 

 4,022 

 4,148 



2,939 

 5,494 

 7,765 

 5,057 

 4,6oi 



7,581 



8,593 

 5,480 

 6,054 

 4,493 

 3,724 

 2,800 

 4,018 

 2,076 

 2,613 

 2,187 

 1,682 

 1,900 

 781 

 739 

 1,537 

 1,078 



675 

 1,775 

 1,800 



1,975 

 2,291 

 2,080 



13,132 

 11,157 

 14,726 

 13,^67 

 11,930 

 15,165 

 11,057 

 12,165 



14,099 

 26,924 

 24,136 

 12,474 

 17,553 

 16,757 

 16, 262 



19,335 



19,485 



11,162 



11,034 



10,560 



9,512 



3,120 



6, 1<+G 



25,232 

 23,558 

 23, 285 

 24,075 

 20,503 



24,335 

 17,485 

 19,217 

 17,096 

 31,702 

 27,955 

 17,073 

 21,238 



20,859 

 20,089 

 24,653 

 24,535 

 15,935 

 15,743 

 17,854 

 19,252 

 15,468 

 12,827 



2J Escapement equals estimated return minus catch. Estimated returns from 

 formula f 2 = P 2 us5n S base year 1547. Return in 1547 equals estimated 



7l "pi 



escapement below Bonneville Dam plus Bonneville count plus catch below 

 Bonneville Dam. 



19 



