Lakeshore Park, Ashtabula, Ohio 



25. Another project consisting of a segmented detached breakwater with 

 three segments was completed in 1982 on Lake Erie at Lakeshore Park, Ashta- 

 bula, Ohio, for the purpose of retaining a recreational beach (Figure 14). 

 The project included the placement of 27,000 cu m of beach fill with segments 

 40 m long, 60 m apart, and placed in an average water depth of 1.5m. The 

 structure is 120 m offshore of the original shoreline and constructed in a 

 slightly arched configuration to provide better protection to the 244-m-long, 

 46-m-wide placed beach. Essentially, no natural littoral material enters the 

 project due to the presence of Ashtabula Harbor to the west and a large water 

 intake structure to the east. The beach has not yet attained a stable sinuous 

 planform and its present width averages less than 30 m. The original postcon- 

 struction beach width was 46 m. In addition, beach fill appears to be moving 

 out of the project to the west (to the right in Figure 14). The fine grain 

 size of the placed material may contribute to this loss. Material eroding 

 from the beach is causing significant shoaling in the vicinity of a boat 

 launching area at the west end of the park. This project is being monitored 

 jointly by CERC and the US Army Engineer District, Buffalo. Data collected to 

 date include surveys, aerial photography, Littoral Environment Observa- 

 tions (LEO), and an extensive set of site visit observations. Approximately 

 800 cu m of material was dredged from the boat launching area both in 1983 and 

 again in 1984 and placed back on the recreational beach. 



East Harbor, Ohio 



26. East Harbor State Park is located on a barrier beach near the west 

 end of Lake Erie. It is approximately 3,600 m long and located between two 

 structured harbor entrances. High lake levels in the 1970' s and early 1980 's 

 stripped away the recreational beach and threatened the park facilities. In 

 the spring of 1983 the state of Ohio built a segmented detached breakwater 

 with four segments (Figure 15) as a test to gather prototype data in prepara- 

 tion for designing a 21-segment structure. These initial breakwater segments 

 are 46 m long, and are separated by gap widths which range from 90 to 120 m. 

 The segments were constructed approximately 180 m off the original shore in an 

 average water depth of 1.5 m. No beach fill was placed as part of this proj- 

 ect. Some planform sinuosity is slowly evolving; however, the lack of avail- 

 able sediment has greatly retarded the shoreline response. In spite of this, 



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