WET LANDS OF SOUTHERN LOUISIANA. 



29 



used, as fuel and is delivered by rail to a point about 300 feet from the plant. 

 The suction pipes are rather longer than is usual in such plants; they were 

 made so to reduce the amount of seepage from the discharge basin across to the 

 suction basin. The ends of the suction pipes are expanded moderately, so 

 that the entrance losses are not great. The discharge pipe discharges below 

 low water and gives a full syphon effect, but as it is not expanded, the losses 



Fig. G. — New pumping plant on the New Orleans Lake Shore Land Company tract. 



of velocity head in this pipe probably are often equivalent to 2 feet of vertical 

 lift. The direction of the water as it leaves the pipe is such that it is directed 

 against the bottom of the discharge basin; this results in a deep hole being 

 washed out, making it necessary that the sides of the basin be protected with a 

 row of round piling. 



As this plant was not of sufficient capacity to drain the entire area, a second 

 pumping plant was erected in 1913 in a more central location on the north 

 side of the district. The new plant has two duplicate units, each consisting of 

 a 48-inch cast-iron, double-suction, horizontal, centrifugal pump, connected by 



