24 



the model water surface pooled at mean astronomical tide level (about 

 +1.8 ft mlw) . In later model tests involving use of the design hurricane 

 tides, these tides were reproduced in combination with the astronomical 

 spring tide range of 4.1 ft at Newport. The 40-knot design tide was used 

 only briefly diiring the testing program since this tide was almost iden- 

 tical at the mouth of the bay with the 1938 hurricane tide used in all 

 preliminary tests, and no test data for conditions of this design tide 

 are included in this report. The 30-knot design tide was not used at 

 all for model test p\irposes. All h\irricane tide test data presented in 

 subseq^uent parts of this report were obtained for conditions of the 1938 

 hurricane tide or the 20-knot design hurricane tide. 



