Except for Plan 2, wave heights at the proposed new barge pier (Basins 25, 

 26, and 30) range between those near the center of Pier 2 (Basin 9) to the 

 exposed end of Pier 2 (Basin 10), depending on the harbor plan. The boat ramp 

 is considerably more 

 protected in most plans 

 relative to the existing 

 harbor. Proposed 

 passenger pier locations 

 in the alternative plans 

 have a wide range of 

 protection. The best 

 protected alternatives 

 give wave conditions 

 similar to the existing 

 Pier 1. The most 

 exposed alternative (Plan 

 4a) gives waves 

 signficantly higher than 

 at any existing pier 

 locations. 



Table 19 



Significant Wave Heights Exceeded 

 10 Percent and 1 Percent of the Time at 

 Field Gages 



Gage 



H, with 10% 

 Exceedance (ft) 



H,with1% 

 Exceedance (ft) 



Pier 2 



0.39 



0.63 



Canoe Club 



1.15 



1.65 



Back Basin 



1.26 



1.99 



Channel 

 Entrance 



3.10 



4.63 



The H, values exceeded 1 percent of the time are considerably higher than 

 those exceeded 10 percent of the time, but show similar relative trends 

 (Figure 51). Existing pier areas still fall below the 1-ft wave height threshold, 

 with the exception of the exposed end of Pier 2 (Basin 10) and, possibly, the 

 northwest end of Pier 1 . Proposed new barge and passenger piers are below the 

 threshold in some plans and above in others. 



74 



Chapter 5 Harbor Response to Wind Waves and Swell 



