The location of the sites is presented in the Table and shown on the location 

 map in Figure 1. For examples of applications of the data, the reader is 

 referred to publications listed in the Bibliography. The data collected at 

 these 25 northern California sites represent output from the program during 

 its formative years. Data collection methods and data recording formats over 

 the years were modified as experience was gained. The most notable change was 

 the recording of the wave approach direction. Recordings of early observa- 

 tions were based on the eight major compass directions; later recordings were 

 based on the coastal sector method which recorded the sector from which the 

 waves were approaching. The data presented in this report extend through the 

 adoption of the protractor method. Later data collection efforts include the 

 use of a protractor to estimate direction of wave approach to the nearest de- 

 gree as measured from a line perpendicular to the shore. Other modifications 

 over the years have been less significant. 



Table, 



Code number, name 

 sites in northern 



, and location of 

 California from 



25 active LEO 

 1968 to 1978. 



Code 

 No. 



Name of site 



Latitude 

 N. 



Longitude 



W. 



Marsden 



square 

 No. 



One* 

 square 



County 



05310 



Pelican Beach State Park 



41*59.56' 



124°12.50' 



157 



14 



Del Norte 



05313 



Enderts Beach 



41°42.50' 



124*08.60' 



157 



14 



Del Norte 



05036 



Prairie Creek Redwoods State Park 



41*21.30 ' 



124*04.50' 



157 



14 



Humboldt 



05307 



Redwood Creek Beach 



41*17.00' 



124*05.57' 



157 



14 



Humboldt 



05306 



Had River 



40*56.00' 



124*08.00' 



157 



04 



Humboldt 



05302 



Centerville Beach 



40*34.40' 



124*21.00' 



157 



04 



Humboldt 



05301 



Shelter Cove 



40*01.40' 



124*03.90' 



157 



04 



Humboldt 



05026 



MacKerricher Beach State Park 



39*29.50' 



123*47.67' 



121 



93 



Mendoc ino 



05025 



Russian Gulch State Park 



39*19.76' 



123*46.99' 



121 



93 



Mendoc ino 



05024 



Van Damme Beach State Park 



39*16.38' 



123*47.39' 



121 



93 



Mendocino 



05300 



Navarro Beach 



39*11.30' 



123*45.40' 



121 



93 



Mendoc ino 



05023 



Manchester Beach State Park 



38*59.03' 



123*42.39' 



121 



83 



Mendoc ino 



05020 



Goat Rock Beach 



38*26.76' 



123*07.64 • 



121 



83 



Sonoma 



05021 



Wright's Beach 



38*24.15' 



123*05.89 ' 



121 



83 



Sonoma 



05355 



Drake's Beach 



38*01.85 ' 



122*57.58' 



121 



82 



Marin 



05500 



Bolinas Beach 



37*54.28 ' 



122*41.07' 



121 



72 



Marin 



05022 



Stinson Beach State Park 



37*53.60' 



122*38.17' 



121 



72 



Marin 



05002 



Thornton Beach State Park 



37*41.92' 



122*29.83' 



121 



72 



San Mateo 



05003 



Francis Beach 



37*28.05' 



122*26.81' 



121 



72 



San Mateo 



05004 



Natural Bridges State Park 



36*57.02' 



122*03.42' 



121 



62 



Santa Cruz 



05367 



Capitola Beach State Park 



36*58.40' 



121*56.50' 



121 



61 



Santa Cruz 



05005 



Twin Lakes State Park 



36*57.70' 



121*59.76' 



121 



61 



Santa Cruz 



05001 



New Brighton Beach State Park 



36*58.72' 



121*56.10' 



121 



61 



Santa Cruz 



05006 



Sea Cliff Beach 



36*58.17' 



121*54.73' 



121 



61 



Santa Cruz 



05007 



Sunset Beach 



36*53.80' 



121*50.32' 



121 



61 



Santa Cruz 



II. HISTORY OF NORTHERN CALIFORNIA LEO PROGRAM 



During the fall of 1966 the Coastal Engineering Research Center (CERC) 

 was asked by the U.S. Army Engineer District, San Francisco, to participate 

 in a cooperative data collection program with the State of California. The 

 program was to provide information on the natural forces and response elements 

 in the littoral zone along the California coastline. CERC assumed the respon- 

 sibilities of organizing the data collection and developing data collection 



