Table Page 



34 Species Composition of Sport Catch and Ranking 

 by Numbers Caught During Creel Census Periods in 

 Pool 26 of the Mississippi River in 1962-1963, 

 1967-1968, and 1972-1973 107 



35 Numbers and Percent Composition of Game, Forage, and 

 Commercial Fish Collected per Hour of Electrofishing 

 in the Tailwaters of Locks and Dams 24, 25, and 26, 

 Mississippi River During 1971 109 



36 Number and Percent Composition of Game, Forage, and 

 Commercial Fish Collected per Hour of Electrofishing 

 in the Tailwaters of Locks and Dams 24, 25, and 26, 

 Mississippi River During 1971 110 



37 A Comparison of Fish Species Present in the Illinois 

 River and Upper Mississippi River (Pools 12-26) for 

 Periods Before and After Construction of the Nine- 

 Foot Channel Navigation System 112 



38 Acres of Aquatic Vegetation at Flat and Swan Lakes, 



Pool 26, Illinois River, 1941-1944 123 



39 Acres of Aquatic Vegetation at Gilbert Lake, Pool 26, 

 .Illinois River, 1941-1944 124 



40 Number of Municipal and Industrial Sources of Pollution 



in the Major Drainage Basins of Illinois in 1927 131 



41 Turbidity of Lake Chautauqua During High River 



Stages and 0-5 mph Wind on 10 May 1977 148 



42 Bald Eagle Census Data for the Mississippi River, 



Pool 24 162 



43 Bald Eagle Census Data for the Mississippi River, 



Pool 25 163 



44 Bald Eagle Census Data for the Mississippi River, 



Pool 26 164 



45 Bald Eagle Census Data for the Lower Illinois River, 



Pool 26 165 



46 Location and Size of Common Egret and Great Blue 



Heron Nesting Colonies in Pools 24, 25, and 26 167 



47 Cormorant Census Data for Pools 24, 25, and 26, 

 Illinois and Mississippi Rivers, 1968-1977 169 



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