Ch. 17] DEEPWATER POINT RANGE, DELAWARE RIVER 



307 



The effectiveness of a given plan was then evaluated in terms of the 

 percentile reduction or percentile increase in shoaling as compared 

 with the base test. 



Numerous plans were proposed and tested, and it was found that 

 two plans, both designed to realign the currents to conform to the 

 channel alignment, indicated reductions in shoaling of approximately 

 50 percent. Plan 1, which indicated a reduction of 47 percent, con- 



CEDAR POINT 



Fig. 5. Location of plans 1 and 2, Deepwater Point Range. 



sisted of a dike beginning at a point 1,900 feet east of the center line 

 of Deepwater Point Range, opposite channel station 189+500, extend- 

 ing upstream parallel to the channel for 2,900 feet, thence forming an 

 angle of 151° and extending for 2,400 feet and tying in to the shore 

 (Fig. 5). The top elevation of the dike was approximately 2 feet 

 above mean high water. Plan 2, which indicated a reduction of 59 

 percent, consisted of a straight, 6,800-foot dike, beginning at a point 

 700 feet east of the channel center line opposite channel station 200 + 

 900 and extending upstream parallel to the channel to station 194 -f 

 100 (Fig. 5). The top elevation of this dike was also about 2 feet 

 above mean high water. It first appeared that plan 2, which effected a 

 slightly greater reduction in shoaling than did plan 1, would be the 

 better plan. On closer examination, however, it was found that current 

 patterns over the problem area as influenced by plan 2 were not so 

 satisfactory as for plan 1 (see Fig. 6) . Furthermore, the plan 2 struc- 

 ture, being located in fairly deep water over its entire length, would be 



