Direction of Ntt 

 LonQihort Trontport 



Phost Z DrtdgtnQ Aran 



Dredgt Entry 



PACIFIC OCEAN 



Primory Feedtr Bioch 

 Propoatd Ortdgc Entry Routt 



500 



500 1,000 tn 



1,000 1.000 



3,000 It 



Figure 6-43. Sand bypassing, Port Hueneme, California. 



(c) Type III: Jettied inlet and offshore breakwater — location at 

 Channel Islands Harbor, California (Fig. 6-46). 



(d) Type IV: Shore-connected breakwater — locations at Santa Barbara, 

 California (Fig. 6-47), and at Fire Island Inlet, New York (Fig. 6-48). 



(e) Type V: Shore-connected weir breakwater or jetty — locations at 

 Hillsboro Inlet, Florida (Fig. 6-49), Masonboro Inlet, North Carolina 

 (Fig. 6-50), Perdido Pass, Alabama (Fig. 6-51), East Pass, Florida (Fig. 

 6-52), and at Ponce de Leon Inlet, Florida (Fig. 6-53). 



Other floating dredge sand-bypassing projects, not illustrated in this 

 section, include the following: 



(a) Type II: Boca Raton Inlet, Florida (channel dredging). 



(b) Type III: Ventura Marina, California. 



(c) Type IV: Oceanside Harbor, California. 



(d) Type V: Murrells Inlet, South Carolina. 



a. Port Hu eneme, Californ ia (Savage, 1957; Herron and Harris, 1967). A 

 unique application of a floating pipeline dredge to a type I littoral barrier 

 was made in 1953 at Port Hueneme, California. Construction of the port and 

 protective jetties in 1940 interrupted the littoral drift, estimated by Herron 

 (I960) to be transported at the rate of 612,000 to 920,000 cubic meters 

 (800,000 to 1,200,000 cubic yards) per year, by impoundment behind the west 

 jetty and also by diverting the sand into the Hueneme Submarine Canyon, where 

 it was permanently lost to the system. The result was severe erosion to the 

 downdrift beaches. 



In 1953 sand impounded by the updrift jetty was pumped across the harbor 



6-61 



