LAND DRAINAGE BY MEANS OF PUMPS. 
15 
and levee were completed; but these differ from the previous con- 
struction by being so located as to include a settling reservoir oppo- 
site the mouth of each stream. These reservoirs receive the sand 
and sediment brought down from the hills, and thus prevent the 
ditch from becoming clogged. The reservoirs were planned to be of 
Frederick 
LEGEND 
Drainage Ditches 
Tile Drains 
Lei/ee 
Railroad 
Roads 
BEARD STOWN 
Fig. 1. — Map of Coal Creek Levee and Drainage District, Illinois. 
such size that they would not become filled with sediment for many 
years. Two of them are, respectively, 5 and 20 acres in extent, 
while two are of 6 acres each and three are of 4 acres each. Figure 2 
of Plate IV is a view looking west-northwest across Hood Basin, 
the largest of the reservoirs. Across the basin may be seen a part 
of the embankment of the original diversion ditch which failed. The 
