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Table 6 - SUMMARY OF PEAK WATERFOWL NUMBERS 
1953 thru 1960 Fall Periods 






:Upper Miss. Louisa Keithsburg Gardner : Batchtown Calhoun NTIR , 
Year : ; ; AREA ; 
1953 + 206,520 - § = f= 2,002,800 + — 302,000 : 1,379,965: 
1954 :  160,8h5 76 ,200 : 95,000 : - 3 162,400 ; 61h,100 ; 837,070 
1955 3 304 579 152,200 : 95 ,000 - 82 ,200 714,800 849,975 ; 
1956 3 2h6 665 # 200,600 : 135 ,150 : - 158,300 : 531,100 > 978,215: 
1957 3 345 ,280 : 251,150 80 ,000 - 56,900 407 ,500 640 ,505 
1958 3 205 ,010 : 176 ,263 : 2,170 7,611 42 ,200 515,100 585 ,276 ; 
1959 : 203 ,957 3 98 ,613 hO ,225 10 ,968 88 ,200 253,100 405 ,172 
1960 ; 232 ,916 k5 ,672 ; 100 ,4e5 35 454 156,450 203 ,200 . 459,934 
AVERAGE PERK ; : : : 
POPULATION: 240,720 : 135,810 78 ,280 18,010. 218 ,550 42 610 767,140 
Average With-: 
out 1953 Data: 245,600 : 135,810 : 78,280 _: 18,010 _: 106,665 : 462,700 : 679,600 _: 
*% Levees broken. No water. 
Note: Peak numbers in "Entire Area" column represent numbers present over the 550 miles of river ON THE 
SAME WEEK} and are not necessarily the canbined total of the individual Units, each of which may 
have peaked at a different time, either earlier or later. 
In 1953, stream flow in Pool 25 (Batchtown Pool) was such that the dam was in "open gate" operation most 
of the summer, which did not impound water. This resulted in extensive mud flats throughout Batchtown 
Refuge. These flats produced tremendous beds of smartweeds and millet, resulting in extremely favorable 
conditions for pintails and mallards. This tended to concentrate ducks that would normally have been 
scattered in other areas, resulting in a peak of over 1 million ducks on en area only 1,995 acres in size. 
This unusual situation has not since been repeated, so it is probably best to drop this concentration 
from average data. (This has been done for this table ONLY.) 
