Erosion in November -December 1971 was slight and was during the 

 typical period of overall erosion. The beach at this site was not able 

 to recover its original configuration during the second year (see App.). 



10. Profile Site 10 . 



This site (Fig. 15) was severely eroded during the first year and 

 experienced a modest amount of erosion the second year. All of the 

 recession occurred in the fall. Although recession took place over a 

 4-month period in 1970, more than 60 percent was during a single sampling 

 interval in October -November and was probably related to a single storm. 

 Site 5 was the only other site to experience significant erosion during 

 that period (both locations have the same shoreline orientation) . Erosion 

 during 1971 was 6 feet of bluff retreat and was spread uniformly over a 

 3-month period in the fall. Adjacent sites were essentially stable 

 during the period of extreme erosion. 



11. Profile Site 11. 



The profile at site 11 (Fig. 16) remained stable throughout the first 

 year of study and experienced only 4 feet of erosion during the fall storm 

 period in the second year (Table 1). Closely spaced survey data are 

 available from a time-series study conducted at this location during the 

 summer of 1970 (Fox and Davis, 1971a, b; Davis and Fox, 1971). 



At this site there are fetches of between 80 to 180 miles in directions 

 from which strong winds are frequent (Fig. 2). These winds could produce 

 waves large enough to cause modest recession rates. The terrace recession 

 in late fall of 1971 was during the period of normal high energy. Site 12 

 to the south also showed significant erosion during the same period, 

 suggesting a regional effect of storm activity. These two sites are the 

 only adjacent locations that experienced "simultaneous" erosion during the 

 entire 2-year period. 



12. Profile Site 12 . 



Only 2 feet of terrace recession occurred at this site (Fig. 17) in 

 the first year of study; however, there was 15 feet of erosion during a 

 2-month period the second year. The erosion occurred in early fall of 

 1970 when only two other sites experienced erosion; the following year 

 erosion took place during the usual high-energy period just before ice 

 cover. Although a number of sites were eroded during November- December 

 1971, this site and site 11 were the only two that experienced erosion 

 during the succeeding 4-week period. 



13. Profile Site 13. 



Except for a 2-foot recession during late fall of 1971, this site 

 (Fig. 18) was stable throughout the study period. This location has been 

 monitored since June 1968 as part of another study (Davis, 1972), thus 

 providing 4 years of profile data which cover a range of lake levels. 



36 



