Department Bulletin 1430 
PLATE VI 
-■■:-■ 
F40065 
Erosion of Earth on Farm 
Fig. 1. — Badly eroded farming land, with brush dams across the gullies, the naked slopes 
planted to locust switches 
Erosion of Earth along Road 
Fig. 2.— Millions of tons of earth from the "hollow" roads of the South half choke the 
streams. Brush placed in a ditch, which through neglect has become a gully, in a futile 
effort to check washing away of the road 
SOURCES OF SEDIMENT WHICH FILLS RESERVOIRS 
If the life of a reservoir is 50 years, the users of power should pay for it in that period. If on 
account of erosion it is only 25 years, the annual payments must be twice as much 
