dolosse on the crown and upper lakeside slope during Step 1 of Hydrograph B 

 (Table 2). The dolosse on the breakwater crown sustained significant damage 

 during Step 2 of Hydrograph B. Eight dolosse were displaced from the crown 

 down onto the harbor-side slope, 2 dolosse were displaced on the lower lake- 

 side slope, and moderate to severe rocking of 10 to 15 dolosse on the crown 

 and upper lakeside slope was observed throughout Step 2. Dolos displacement 

 was continuing to occur at the end of Step 2 and the step duration was ex- 

 tended 40 min, during which time the damage rate slowed down considerably but 

 did not stop. During Step 3, 10 dolosse were displaced onto the harbor-side 

 slope. Damage had not stopped at the end of the step and it was extended 

 approximately 25 min. By the end of the Step 3 extension, all damage had 

 stopped but continued minor to significant rocking of dolosse was occurring on 

 the upper slope and crown. The structure then was exposed to a fourth hydro- 

 graph step which consisted of 25 min of the Step 2 wave condition (8-sec, 

 15.0-ft nonbreaking wave). This was done to see if damage would be reini- 

 tiated at this condition, which appeared to be the worst condition of Hydro- 

 graph B relative to the overall stability of the dolos armor. (All three wave 

 conditions of Hydrograph B produced major overtopping.) Seven more dolosse 

 were displaced from the crown onto the harbor-side slope and the test was 

 stopped. It appeared that the damage (dolos displacement) would continue on 

 the upper slope and crown, and the level of damage already exceeded an accept- 

 able amount. Photos 5-7 show the breakwater condition at the end of Hydro- 

 graphs A and B. During these hydrographs there appeared to be a slow shore- 

 ward migration of a few of the existing crown armor stone and several addi- 

 tional dolosse on the crown that were not referred to in the test results 

 reported in this paragraph and paragraph 13. 



15. In summary, during Hydrographs A and B, 24 dolosse were displaced 

 from the crown onto the harbor-side slope and 3 dolosse were displaced down 

 the lakeside slope from their original placement location below the swl. 

 Several crown dolosse and crown stone showed some shoreward migration and 

 numerous dolosse around the swl and on the upper lakeside slope and crown 

 exhibited in-place rocking that ranged from minor to major. All wave condi- 

 tions produced wave overtopping which ranged from moderate to major. 



16. The 4-ton dolos armor was removed, the underlayer stone and exist- 

 ing stones on the crown and upper breakwater slopes were restored to their 

 original positions (Photos 8-10), and the dolos armor layers were rebuilt 



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