KING HARBOR. REDONDO BEACH. CALIFORNIA. 

 BREAKWATER STABILITY STUDY 



Hydraulic Model Investigation 



PART I: INTRODUCTION 

 Prototype 



1. King Harbor is a man-made harbor located on the Pacific coast in the 

 City of Redondo Beach, California, at the southern end of Santa Monica Bay 

 (Figure 1) . The harbor is approximately 17 miles* southwest of central 



Los Angeles and serves as a port of call designed to accommodate small craft. 

 Two rubble-mound breakwaters, north and south, provide protection for the 

 harbor, which includes three basins enclosed by four moles with reveted 

 slopes . 



2. The principal economy of the harbor includes commercial and recre- 

 ational fishing and pleasure boating. Attraction of the recreational 

 facilities results in a healthy economy for adjoining businesses. 



Existing Breakwaters 



3. The North Breakwater (NB) was constructed during 1937-1939 by the 

 Public Works Administration to a length of 2,370 ft with a crest elevation of 

 +10 ft mean lower low water (mllw) . The crest elevation was raised to 



+14 ft mllw, and the breakwater was extended to 5,200 ft in 1958. The 

 600- ft- long South Breakwater was also constructed in 1958 by the US Army Corps 

 of Engineers, at a crest elevation of +14 ft mllw. An 8-ft-high seawall, 

 1,020 ft long, was added to the northern end of the NB in 1962 by the City of 

 Redondo Beach. Additionally, the crest elevation of the NB was raised to 

 +20 ft mllw from Sta 15+50 to 36+00 during 1964. 



4. The NB has experienced severe damage during winter storms when high 

 waves and water levels have combined. Repairs have been required after storm 



* A table of factors for converting non-SI units of measurement to SI 

 (metric) units is presented on page 3. 



