UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Bntared) 



REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



MR 80-2 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



THE EFFECT OF STRUCTURES AND LAKE LEVEL ON BLUFF 

 AND SHORE EROSION IN BERRIEN COUNTY, MICHIGAN, 

 1970-74 



5. TYPE OF REPORT 4 PERIOD COVERED 



Miscellaneous Report 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfsJ 



William A. Birkemeier 



8. CONTRACT OR GRANT NUMBERfs; 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-CP) 



Kingman Building, Fort Belvoir, Virginia 22060 



D31194 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir. Virginia 22060 



12. REPORT DATE 



April 1980 



13. NUMBER OF PAGES 



7A "7^ 



1 *A C< 



14. MONITORING AGENCY NAME 4 ADDRESSffr different from Controlling Olllce) 



15. SECUR1XY„CL'ASS. fof thia report) 



UNCLASSIFIED 



16. DISTRIBUTION ST ATEMENT fof tfl/s ReporfJ 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT fof (ho abs(rac( entered In Block 20, II dllterent from Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS fConfinuo on reverse aide II n. 



Berrin County, Michigan 

 Bluff recession 



saary and Identify by block number) 



Coastal structures 

 Great Lakes 



Lake Michigan 

 Shore erosion 



20. ABSTI^ACT (Cazrtbium am rwverae sfA ff n«c0«aary and Identify by block number) 



Rates of bluff recession and shoreline change along five 1.6-kilometer 

 reaches located within Berrien County, Michigan, between 1970 and 1974 were 

 measured by use of aerial photos. Annual measurements were made at 30.5- 

 meter intervals, except for two adjacent reaches where biannual measurements 

 were made. The overall average rate of recession for the five reaches was 

 3.8 meters per year. Average recession rate varied from 2.4 meters per year 



Continued 



EDrnON OF » NOV 65 IS OBSOLETE 



UNCLASSIFIED 



SECURITY CLASSIFtCATTON OF TMtS PAGE (When Data Entered) 



