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concerned either alone or in cooperation with other bureaus. 

 The work involves field studies, laboratory tests, library re- 

 search and study of conditions in other states. When the 

 present Survey was created there was, in a sense, thirty 

 years of back work to do in collecting data and noting changes 

 which had taken place. The work is now well under way and 

 the methods adapted to this field are determined. The rate 

 of progress will depend largely on the funds available. 



The Survey is organized into three sections, geologic, topo- 

 graphic and drainage. There is close cooperation with allied 

 bureaus in the state, with the U. S. Geological survey and the 

 U. S. Department of Agriculture. Through fortunate situation 

 at Urbana there has been valuable consultation with geologists, 

 chemists, and engineers of the State University as well as 

 with those of other institutions. 



The first necessary step has seemed to be the preparation 

 of topographic base maps. The accompanying map illus- 

 trates the progress of this work. The topographic map of 

 the state will be composed of unit quadrangles measuring 

 about 13 by 18 miles each. They serve as a base for geologic 

 studies and also for general engineering and educational pur- 

 poses. They are prepared in cooperation with the U. S. 

 Geological Survey, and progress so far has been designed 

 especially to meet the need of surveys in our mining regions. 



The geologic work has been of several degrees of refine- 

 ment, detailed reports have been prepared in many of the 

 quadrangles, while general reconnaissance studies of stratig- 

 raphy, structure, and mineral resources have been pursued over 

 the state so as to rrieet pressing needs and to lay the foundations 

 for further detailed work. 



The drainage section has worked in cooperation with the 

 Internal Improvement Commission and the Drainage Sec- 

 tion of the U. S. Department of Agriculture in the prepara- 

 tion of large scale maps of the overflowed areas along our 

 largest streams. Such work is a prerequisite to any success- 



