2. Profiles (a) should be taken generally parallel to each other and 

 approximately perpendicular to the shoreline, (b) should extend from baseli 

 to 12-foot depth contour. 



3. Length, L, is distance between property lines at shoreline. 



4. The spacing between profiles should not exceed 200 feet. 



5. All elevations refer to International Great Lakes Datum as measured abo 

 mean water level at Father Point, Quebec (I.G.L.D., 1955). 



Figure 1. Schematic plan; optimum shoreline surveillance program. 



