4. Detached Breakwater— Middle and Long Beach Breakwaters— Long Beach, California. 



-#<«' 



Figure 41. View of west end of middle breakwater (August 1973). 



a. Construction. 



(1) Completed. 1949. 



(2) Type. Sand and clay mound covered with rock blankets (Fig. 41). 



(3) Purpose. Protection of Long Beach Harbor. 



b. Owner. Department of the Army, Corps of Engineers, South Pacific Division, Los 

 Angeles District, 300 N. Los Angeles Street, Los Angeles, California 90012. 



c. Location (approximate). San Pedro Bay off Long Beach, California forming southern 

 boundary of harbor. 



Latitude: 33°43'N. - Longitude: 118°12'W. 



d. Physical Environment (Fig. 42). 



(1) Protected Ocean Environment. Ocean environment is protected through the 

 northern half by proximity to shore; partially protected from south and southwest by 

 Catalina and the Channel Islands, but fully exposed to southeast. 



(2) Wave Conditions. Seas and swells are predominantly from the northwest 

 (U.S. Navy Hydrographic Office, 1969), but reaches a 20-foot range on the ocean side 

 during southeast storms. 



77 



