valley. The government is also engaged in managing an extensive
project in the southern part of Okanogan county, where probably
50,000 acres will be reclaimed.

There is a large acreage in Franklin and Walla Walla counties,
about the junctions of the Snake and Columbia rivers, to which
Pasco is central, which is arid. The government has once turned
this project down, but is now reconsidering it, and it is reported
that these lands will soon be put under ditch by the joint action
of the government and the Northern Pacific railway, which owns
a large portion of the lands.

Meanwhile private enterprises are reclaiming extensive tracts in
Klickitat county, and in fact nearly all the counties bordering on
the Columbia and Snake rivers in eastern Washington. It is probable
that there are more lands capable of irrigation in the state than can
be irrigated with available waters. This fact adds to the importance
of the question of what to do with arid lands when no water can be
put upon them.


METHODS OF IRRIGATION.

There are three methods in use in supplying water to the arid lands.
The first and the one most generally adopted for obvious reasons is
the gravity system. The waters are impounded in lakes or artificial
reservoirs and carried thence in large main canals, winding about
the hills so as to secure a low uniform grade. Once established,
no other force is needed but the usual flow of the water.