The wetlands of southern Louisiana and their drainage . ews of Pumping Plant on Area No. 7, Gueydan, La., Showing Arrangement of Engines and Pumps. DRAINAGE OF WET LANDS OF SOUTHERN LOUISIANA. 43 vent flooding. In these soft spots the levee is only about a foot above mean tideand considerable work will have to be done to bring it to grade. Additions arebeing made to these portions with hand labor, and at present subsidence haspractically ceased. On a portion of the levee where the old bank was used for a foundation somepeculiar seepage conditions have become apparent. Water appeared in theinte
The wetlands of southern Louisiana and their drainage . ews of Pumping Plant on Area No. 7, Gueydan, La., Showing Arrangement of Engines and Pumps. DRAINAGE OF WET LANDS OF SOUTHERN LOUISIANA. 43 vent flooding. In these soft spots the levee is only about a foot above mean tideand considerable work will have to be done to bring it to grade. Additions arebeing made to these portions with hand labor, and at present subsidence haspractically ceased. On a portion of the levee where the old bank was used for a foundation somepeculiar seepage conditions have become apparent. Water appeared in theinterior of the district some 20 to 40 feet from the levee, and an examinationshowed that the subsoil of the impervious Sharkey clay was filled with holesthat varied in size from that of the usual crawfish hole, about 1 inch in diam-eter, up to several Inches, the latter probably being muskrat holes. This was ina place where the underlying subsoil was very solid. It will be necessary to cuta deep muck ditch along this levee and fill it with puddled Fig. 12, —Sketch map of area No. 5, Des Allemands, La Fourche Parish, of levee and ditches. showing Reservoir Canals. As shown in figure 12, the reservoir canals were all cut in the interior of thedistrict. By extending the canals to all parts of the tract the necessity ofsmall collecting ditches was eliminated. A small canal gives much better out-let to the laterals than a collecting ditch and is easier to maintain in goodcondition. These canals were cut with a dipper dredge and the material wasdeposited rather close to the sides of the canal. This resulted in a smallamount of shrinkage in the size of the canals, there having been, in February,1912, about 4 feet of soft mud in the bottom of each of them; part of this wasperhaps left by the dipper dredge when cutting the canal. It was expectedthat an attempt would soon be made to remove this mud with a small hydraulicdredge; this should be a very favorable situat
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1914
