VI-66 



Structure itself. 



Though these small flow regulation structures, along with their larger 

 counterparts, the high dams and large impoundments, may be above tide 

 water, their influence is as important as that of structures within 

 the estuarine zone itself. 



SOCIOECONOMIC DATA 



These data describe the basic economic make-up of an estuarine- 

 associated land area which is usually a county, since the county is 

 the smallest unit for which data are available. The majority of data 

 which have been assembled, including those for Standard Metropolitan 

 Statistical Areas (SMSA's) are relatively gross. They provide an 

 adequate picture at the State or regional level, but are generally 

 lacking in the fine grain detail which would be necessary to do an in- 

 depth analysis of a small area. 



Some detail records have been acquired recently and the first step 

 toward a nationwide economic breakdown of small specific areas on the 

 coastline should commence with careful study of the material which 

 is available in-house. A study of this type would serve two purposes: 

 1) full usefulness would be made of the data records already acquired, 

 and 2) additional information needs would be clearly pin-pointed. 



The continuing need in this segment of information is not so much one 

 of locating and acquiring additional data. Emphasis should be placed. 



