Figure 29. Photo of floating tire breakwater, 

 Langley, Washington. 



of current drag and loss of buoyancy. Reports on other Styrof oam-f iiled tire 

 breakwaters state that the foam breaks down under the continuous flexure expe- 

 rienced in the wind wave exposure. 



The owner-operator is not satisfied with the performance of the break- 



d. Discussion . The site, with its long fetch up Saratoga Passage and 

 the frequency of winds from that direction, experiences more severe conditions 

 than are appropriate for the type of breakwater installed. 



9. Everett, Washington. 



a. Location . The breakwater is at a large small-craft harbor that lies 

 along a waterway in the Port of Everett (Fig. 30). The waterway is only about 

 800 feet wide; thus, the breakwater serves primarily to protect the harbor 

 from boat wake. 



b. Site Conditions . Tide data include a mean range of 7.4 feet and a 

 diurnal range of 11.1 feet. Tidal currents are estimated at 1 to 2 knots. 



c. Breakwater Description . 



(1) Design and Installation . The breakwater is of the concrete 

 caisson-type cast over a Styrofoam core having a cross section 3 by 10 feet 

 and draft of 1.5 feet. The north section (see Figs. 30 and 31) is 530 feet 

 long; the south section is 860 feet long. 



50 



