varies with the stage of the tide, reaching a maximum of approximately 

 k miles per hovir. The temperature of the water at the time of installation 

 was 64° F. A sample of. the channel water, taken in the immediate 

 vicinity of the test Ijoard on June 26, 19^^^ contained 12,620 ppm of 

 salt. During the one-year period prior to the installation of the 

 test board, the salinity of the channel water varied from approximately 

 4,000 to 24,000 ppm. The water had a dirty, muddy -brown color and 

 contained some visible foreign material. 



2. USIMC-2 (Flnf^er Pier No. 21 ). The depth of water where this 

 test board was installed was 22 ft below mean low water. The board was 

 installed with its lower end at a depth of 20 ft and the top at a 

 depth of ik ft below mean low water. The tidal range and velocity are 

 the same as the readings given for the first test board. The 

 temperature of the water at the time of installation was 64° F. A 

 sample of the chajinel water taken Jtme 26, 1944, in the immediate vicinity 

 of this test board contained 12,920 ppm of salt. The water was moderately 

 dirty and contained some visible foreign material. 



5, 'USHMr-3 (Naval Ammunition Depot Pier ). The depth of water 

 where this test board was Installed was 20 ft below mean low water. The 

 board was Installed with its lower end at a depth of l6 ft and the 

 top at a depth of 10 ft below mean low water. The tidal range ajid 

 velocity are the same as the readings given for the first test board. 

 The tenrperature of the water at the time of installation was 65° F. 

 A sample of the channel water taken in the Immediate vicinity of the 

 test board on June 26, 1944, contained 15,260 ppm of salt. The 

 water was moderately dirty. 



Further data on the temperature and salinity records, as well 

 as on the pH refection of the water at these locations, are given in 

 the three following tables: 



175 



