| Summary: | Source: https://erdc-library.erdc.dren.mil/jspui/ A 1:100-scale model of Port San Luis (formerly known as San Luis Obispo Harbor), California, and sufficient offshore area to permit generation of the required test waves, was used to investigate the arrangement and design of certain proposed harbor improvements with respect to wave action. The proposed harbor improvements consisted of (A.) an 1150-ft-long south breakwater extending east-northeast from Smith Island, with a 370-ft-long breakwater wing extending northward from this structure; (B.) a 3515-ft-long detached breakwater with a north-northeast to south-southwest alignment, located approximately 500 ft seaward of the Port San Luis Wharf; (C.) a 1300-ft-long north breakwater extending from a point on shore southward toward the north end of the detached breakwater; and (D.) development of the inner harbor by constructing landfill areas and boat slips for the anchorage of small pleasure craft. A 60-ft-long wave machine and electrical wave height measuring and recording apparatus were utilized in model operation. Base tests were conducted with existing prototype conditions installed in the model. Results of the tests involving the various improvement plans were compared with the base test results to determine the relative effectiveness of the respective plans. Of the plans tested, the optimum configuration appears to be that designated as Plan 12. It was concluded from the test results that (1.) the proposed 1300-ft-long north breakwater and the 370-ft-long south breakwater wing can be replaced by revetted fills; (2.) the length of the south breakwater should be increased by 400 ft; (3.) the northern end of the proposed harbor should be redesigned to prevent excessive wave heights in that area; (4.) the optimum harbor improvement plan (plan 12) will provide sufficient protection to the inner harbor from storm waves most of the time; however, when exceptionally high storm waves from the south-southeast deepwater direction occur simultaneously with high tide ...
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