76 N. J. Agricultural Experiment Station, Bulletin 348 



tion of sluices employed as an outlet for a large creek which, at the 

 point where the gates were introduced, was 75 to 80 feet wide. 



I. All sluices shall have an inside measurement of 6 by 3 feet and shall be 

 built of 3-inch tongued and grooved long-leaf pine, free from knots or seri- 

 ous blemish; they shall not be shorter than 155^ feet and shall extend from 

 the outside of the dike — facing back under the dike. These boxes shall be 

 stiffened with 4 by 5-inch ribs bolted at each corner with a one-half-inch bolt 

 properly washered and drawn up with a satisfactory nut. These ribs shall be 

 placed around the outside of the box fitting it closely at distances of 18 

 inches apart. The first and last shall be made flush with the ends of the 

 box. The planking shall be firmly spiked to these ribs with 6-inch galvanized 

 spikes. The top of tTie box shall be covered with 2-inch long-leaf pine spiked 

 on the top of the ribs. 



2. The dike shall be faced on the river side with plank piling for 120 feet 

 at the mouth of Kingsland Creek. This facing shall consist of 3-inch long- 

 leaf pine planking, free from knots and serious blemish, not less than 14 feet 

 long driven in until the top shall be i foot below the level given for the top 

 of the dike. If the tops of the piles are splintered, split or broomed by 

 driving, they shall be cut ofif below the lowest point of injury. In any case 

 the cut-off ends shall not be such as to make the length of pile less than 

 that provided. The top of the piling shall be even and bound together by 

 running a 3 by 8-inch stringer along the outside and inside surface. 



Each pile shall be bound to this stringer by a i/^-inch bolt which shall be 

 furnished with large washers and a suitable nut. The opening for the sluice- 

 boxes shall be made closely to fit the box. The cut ends of the piling above 

 the box shall be bound together by 3 by 8-inch stringers which shall extend 

 one on the inside and one on the outside from a point 2 feet beyond the op- 

 posite edge of the opening. These stringers shall be set flush with the cut 

 ends of the piling and each pile which they cover shall be bound to them by 

 a i/2-inch bolt properly washered and fitted with a nut. The cut ends of the 

 piling below shall be bound together in the fashion above described. 



3. All sluice-boxes shall be laid on two extra rows of sheet piling com- 

 posed of 3-inch long-leaf pine closely set together. The planking shall be lo 

 feet long and driven in until the top shall be 9 inches below mean low tide. 

 The above provision regarding injury due to driving and its correction shall 

 be observed here. Each row of this sheet piling shall be bound together at 

 the top in a fashion similar to that provided for the dike facing, and the piling 

 at the sides of the boxes shall extend up through the stringers i foot and 

 the rectangle thus formed shall be made closely to fit the boxes. 



4. At the sluice-boxes the inner side of the dike shall be protected by sheet 

 piling wing-walls made of 2-inch long-leaf pine without serious blemish, 14 

 feet in length driven in until the top is i foot below the level of the dike. 

 The above provision regarding injury due to driving and its correction shall 

 be observed here. They shall be bound together at the top in the same fashion 

 as the dike facing, and shall extend 6 feet each side of the sluice-boxes. 



5. The river side of each sluice-box shall be furnished with a 7 by 4- 

 foot gate made of tongued-and-grooved white pine. It shall be composed of 

 two layers, the inside one being made of 3-inch 7-foot-long planking and the 

 outside one of 2-ii>ch 4-foot-long planking laid at right angles to one another 



