Terrace Outlets and Farm Drainageways Page: II
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W HEN PIONEER American farmers cleared forest
lands or plowed native sod in order to secure
land for the production of farm crops they removed
nature's protective covering from many of the natural
depressions that collected the run-off from their fields
and conveyed it to streams and rivers. Destructive
bullying of farm land began in these unprotected
( rainageways. Conservation farming necessitates
the repair or rebuilding of these damaged drainage-
ways and the construction of new outlets to dispose
safely of the run-off discharged from terraces, diver-
sion ditches, and other erosion-control measures that
are now used extensively.
This bulletin is a compilation of the best informa-
tion now available for farmers on the construction
and use of terrace outlets and the protection, im-
provement, and maintenance of other sloping drain-
ageways. The term "drainageways" as used in this
bulletin refers primarily to channels of surface drain-
age in the upper reaches of watersheds or in unit
drainage basins. "Outlet" is a more restricted term
and refers only to drainageways that are provided to
receive and convey the discharge from the ends of
The scope of this material is limited to surface run-
off-disposal measures required in upland or rolling
terrain where slopes are steep enough to cause
channel erosion. It does not cover surface drainage
or underdrainage of flatlands where natural drainage
Washington, D. C. Issued July 1939
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Hamilton, C. L. Terrace Outlets and Farm Drainageways, pamphlet, 1939; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc97276/m1/2/: accessed December 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.