' ^.i'.''.' ,'\{^}'^~r Mt,..Ti, '■;■;'• S *^^ 



I j 



ij 



WD. -600 0' 





B ^j ! * : 9 .•- 9 - 9 5 



B 



1949 - 1950 



Rock Surfo 



Figure 40. Typical structure cross section. 

 Grand Traverse Bay Harbor, Michigan 



73 



