swells generated in distant ocean areas. They have heights up to 10 

 feet and periods up to 20 seconds with the greater heights and shorter 

 periods occurring in the winter. Winter waves generally approach the 

 shore from upcoast of normal, summer waves frequently approach from 

 downcoast of normal. As a result the predominant direction of littoral 

 transport is toward the southeast. Sand is supplied to the shore by 

 tributary streams, especially during storm runoff. The principal 

 contributor affecting the shore of the study area is San Juan Creek. 

 The volume supplied deoends on occurence of floods, but is estimated 

 to average about 78,000 cubic yards annually. The average annual 

 volume of material removed from the shore in the vicinity of San Juan 

 Creek by littoral processes is estimated at 101,000 cubic yards, the 

 estimated deficiency in supply thus being 23,000 cubic yards annually. 



The District Engineer developed plans for protecting the shore of 

 the problem areas. He and the Division Engineer and the Beach Erosion 

 Board concluded that the most suitable and economical plans of shore 

 protection for the several problem areas are as follows: 



a. For Doheny Beach State Park, a protective beach 100 feet 

 wide and approximately 6,000 feet long by artificial placement of about 

 329,000 cubic yards of suitable sand on the beach, one groin 23>0 feet 

 long on the west side of San Juan Creek, maintenance thereafter to be 

 by periodic artificial placement of an estimated average annual quantity 

 of 23,000 cubic yards of sand. 



b # For Capistrano Beach Colony shore, a protectiire beach 

 100 feet wide and 3,U00 feet long by artificial placement of approximately 

 11?, 000 cubic yards of suitable sand. 



c. For the upper San Clemente segment, a protective beach 

 100 feet wide and about 7,100 feet long by articicial placement of 

 approximately 3b3,000 cubic yards of sand. 



They made an economic analysis of the plan of protection for Doheny 

 Beach State Park since the shore of this area is publicly owned, and 

 concluded that the plans are justified by prospective benefits and that 

 the public interest involved in protection of public property warrants 

 Federal assistance in accordance with existing policy. They further 

 concluded that artificial placement of suitable sand fill is the most 

 suitable and economical plan of protection for the shores of the 

 Capistrano Beach Colony and upper San Clemente segments, but that no 

 public interest is involved in protection of those privately owned 

 shores. They accordingly recommended that a project be adopted by the 

 United States authorizing Federal participation by the contribution 

 of Federal funds in amount of one-third of the first costs of a plan 

 comprising a beach fill and one groin for the restoration and protection 

 of the shore at Doheny Beach State Park, Orange County, California, and 

 one-third of the oosts of periodic nourishment for a period of 10 years 

 from the year of completion of the initial fill, with such modifications 

 thereof as may be considered advisable by the Chief of Engineers. 



The Chief of Engineers concurred in the views and recommendations 

 of the Beach Erosion Board. 



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