material is supplied to the shores of the problem area by littoral 

 ttansport from shores to the north, by erosion of the bluffs and by 

 stream deposits within the area. Wave forces having a predominant 

 downcoast component are adequate for a substantial rate of littoral 

 transport, so that available material is moved rapidly downcoast 

 through the problem area along the north shore of Monterey Bay to 

 the east shore of the bay. Reversals in transport direction occur 

 along the northern shore of Monterey Bay, except in those sections 

 having north-south or northeast-southwest orientations such as just 

 north of Point Santa Cruz and the Opal Cliffs - Capitola section. 

 In general, those sections have no beaches, but other sections having 

 a northwest-southeast orientation, such as Santa Cruz, Twin Lakes smd 

 Del Mar Beaches, have adequate beaches in summer. Winter profile 

 adjustments reduce the width of the latter two beaches, so that in- 

 adequate protective beaches remain in front of the bluffs. The 

 estimated average rate of recession of the unprotected soft rock 

 cliffs has been 1 foot annually. 



The district and division engineers and the Beach Erosion Board 

 concluded that the most suitable and economical plans of shore pro- 

 tection for the several sections of the problem area are as follows: 



a. For the West Cliff, Del Mar and Opal Cliff s-Capitola 

 sections, riprap seawalls; 



b. For the Twin Lakes section, a beach fill with a minimum 

 width of 120 feet along both the easterly and westerly poctions, and 

 two rubble-mound groins. 



The district and division engineers and the Beach Erosion Board con- 

 cluded that the plans for the West Cliff and Twin Lakes sections and 

 for an 870-foot reach fronting Cliff Drive in the Opal Cliff s-Capitola 

 section are justified by prospective benefits, and that the public 

 interest involved in protection of public property warrants Federal 

 assistance in accordance with existing policy. The district engineer 

 recommended adoption of a project by the United States authorizing 

 Federal participation, subject to certain conditions, by contribution 

 of funds in amount of one-third of the costs applicable to protection 

 of the publicly owned shores of the problem area. Subsequent to 

 completion of the district and division engineers* reports the policy 

 of Federal aid in shore protection was modified somewhat by enactment 

 of Public Law 826, 84th Congress, approved July 28, 1956. By separate 

 communication the division engineer advised that consideration of the 

 policy of Federal aid expressed in Public Law 826 indicated that the 

 Federal share of cost for West Cliff Drive and for Cliff Drive in the 

 vicinity of 49th Avenue should be increased. 



In accordance with the policy expressed in Public Law 826, 84th 

 Congress, the Beach Erosion Board recommended that projects be adopted 

 by the United States authorizing Federal participation, subject to 



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