It is interesting to note that according to the data presented 

 in Table 1, the sand on the beach facing the open ocean is not 

 particularly well-sorted for beach sand, as the coefficient of sort- 

 ing ranges from 1.34- to 1,4-1. The sand on the beaches in the harbor 

 and just west of the jetty, is well sorted, having a coefficient of 

 sorting of 1,19 to 1,22, All samples have very little skewness, as 

 the logarithm of skewness ranges between -0,011 and +0.014., 



The fixed dredge is housed in a reinforced concrete building 200 

 feet long and 40 feet wide, with walls 5 feet thick. The base of this 

 building lies 30 feet below mean low water to give the stiructure 

 stability and protection against waves. The dredge is manned by six 

 suction pipes 18 inches in diameter, which feed into a pipe line of 

 equal dimensions, 7000 feet in length. This pipe line passes along 

 the v;est side of the harbor and crosses the harbor along the central 

 dock. A booster pump is located at the northwest corner of the harbor. 

 A double swinging bridge carried the pipe across the entrance to the 

 inner port'. The pipe comes apart in three places to permit opening 

 of the swinging bridge when ships enter the inner harbor. The level 

 of the pipe is 10 or 12 feet above mean low water. The bends of the 

 pipe at the corners of the harbor have a radius of curvature of 15 

 feet. The outlet of the pipe is 500 feet off shore on the east side 

 of the east breakwater. It spills out on top of the riprap. No 

 sand island has formed at the point of discharge. As of November 

 1951, the swinging bridge across the channel to the inner harbor was 

 being maintained in an open position, and sand from the dredge was 

 being pumped to low places west of the harbor. 



A pond 100 feet in maximum width has been dug in front of the 

 stationary dredge, but the sand from the ocean does not freely enter 

 this pit so it can be dredged away. In order to cause the shore line 

 to recede to a position where waves can wash sand into the dredging 

 pit, a drag-line has been installed to pull sand into the dredging 

 pit. An anchor buoy and winch are used for this purpose. Two lines 

 of concrete piles about 20 feet apart have been constructed in order 

 to facilitate the entrance of sand into the dredging pit. The drag- 

 line and dredging pumps are said to operate four hours at each high 

 tide. The sand-drag has to be operated continually, as sand soon fills 

 the trough dredged by the drag-line, thus preventing the movement of 

 sand into the dredging pit by natural beach processes. Sand is also 

 scooped from the beach with the aid of bulldozers and piled on top of 

 the storm berm just west of the dredging pit. (Figure 2). 



As this dredging progresses, the beach is receding, as is 

 attested by the steep little cliffs at the rear of the fore-slope. 

 Y^en the beach shall h^ve receded to point A (Figure 2), it is planned 

 to remove the line of piles from A to B, and those on the other side 

 as well, so that sand more freely can enter the dredging pit. A 

 temporary line of piles will then be driven along line BC. When the 

 beach reaches B, this series of piles will -be removed and a permanent 



27 



