(2) References . McNair and Hill (1972); Section VII, 8, a of 

 this report. 



(3) Laboratory . WES. 



(4) Test Period . January 1969 to February 1970. 



(5) Problem . The principal purpose of the new inlet was to 

 provide a safer and shorter route for recreation and charter boats be- 

 tween the Shrewsbury-Navesink River complex and the popular fishing 

 grounds lying offshore and to the southeast. Boats presently travel 

 north through Sandy Hook Bay, around the tip of Sandy Hook, then south 

 to the fishing grounds. The proposed inlet would reduce travel distance 

 and time by more than 50 percent and would provide a safer passage by 

 eliminating the need to pass through the rough waters of Sandy Hook Bay. 

 The proposed inlet would be constructed across Sandy Hook Peninsula about 

 5 miles south of the entrance to New York Harbor (Fig. 3-64). The new 

 inlet, known locally either as Shrewsbury or Sandy Hook Inlet, had pro- 

 posed dimensions of 250 feet in width and 15 feet in depth at MLW. Be- 

 fore making the final decision on whether to construct the new inlet, it 

 was essential to know its effects on tides, currents, salinities, tem- 

 peratures, and the flushing characteristics of Sandy Hook Bay and the 

 Shrewsbury-Navesink River complex so that effects of the project on 

 environmental factors throughout the area could be fully evaluated. 



(6) Purpose of Model Study . The model studies were conducted 

 to determine the effects of the inlet on (a) water quality in Sandy Hook 

 Bay and the Shrewsbury and Navesink Rivers from the viewpoints of public 

 health, recreation, and fish and wildlife; (b) flooding within the areas 

 as a result of normal tides and hurricane surges; (c) recreational boat- 

 ing and commercial navigation; (d) general shoaling characteristics and 

 maintenance requirements; (e) the optimum location and length of jetties 

 at the ocean end of the proposed inlet; and (f) transmission of wave 

 energy through the inlet into Sandy Hook Bay. 



(7) The Model. Two physical models were used for the studies. 

 The first was an undistorted l:100-scale model (Fig. 3-65) of the area in 

 which the new inlet would be constructed, including appropriate parts of 

 the ocean and bay approaches to the inlet. This section model was about 

 65 feet long and 30 feet wide. A comprehensive discussion of the section 

 model is presented in Section VII. The second model used was an existing 

 comprehensive model of New York Harbor (Figs. 3-3 and 3-66) constructed 



to linear scales of 1:1,000 horizontally and 1:100 vertically. The model, 

 extended for this study to include the Shrewsbury-Navesink Rivers and 

 appropriate offshore areas, was about 500 feet long, covered an area of 

 about 25,000 square feet, and was equipped with a primary tide generator 

 in the ocean and secondary tide generators in Long Island Sound and the 

 upstream end of the Hudson River. 



(8) Test Procedures . The section model was used to define the 

 hydraulic characteristics of the proposed inlet, to study the details of 

 channel and jetty locations and dimensions, and to determine the amount 

 of wave energy that would be transmitted through the new inlet into Sandy 



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