Page 378 - 1915, Springs of CA.

358 SPRINGS OF CALIFORNIA.
in banks near the creek have been improved, one for a domestic
supply and the other as a small drinking spring. The water is locally
believed to contain considerable iron, and the presence of this mineral
is indicated by rust-colored vegetable growths as well as by the red,
iron-stained color of the -lava. In the summer of 1910, which followed
a season of unusually low rainfall, the two improved springs yielded
only 3 or 4 gallons a minute, whereas the.creek carried perhaps ten
times as much but in seasons of more plentiful precipitation the
yield of the springs, as well as the flow of the creek, is much larger.

SPRINGS AT BASE OF MOUNT HANNAH (LAKE 48).
Cool fresh-water springs that yield perhaps 75 gallons a minute
issue atvthe southeast base of Mount Hannah and supply water for
irrigation and other uses on a small dairy ranch. Like the springs on
the Gifford ranch, those of Mount Hannah come from lava slopes and
seem to be directly dependent on the annual precipitation for their
supply.
In connection with these cold fresh-water springs on the Gifford
ranch and Mount Hannah, it is of interest to note that no such
springs are found on Mount Konocti, which lies at the edge of Clear
Lake and overshadows Soda Bay.

SPRINGS SOUTHWEST OF CHALK. MOUNTAIN (LAKE 28).
On the eastern side of Clear Lake and about \\ miles southwest of
Chalk Mountain, there are several small areas in which basaltic lava
overlies the altered marine sediments that cover a large part of the
region. At the northern border of one of the largest of these lava
areas, which forms a hill or ridge, cool fresh water issues at two or
three places. The supply from the main springs, which yield per-
haps 75 gallons a minute, has been collected in a ditch and used for
irrigation. These springs are of interest both because of their eco-
nomic value and because springs of this character are not common in
Lake County. Their position at the northern border of the lava area
is of geologic interest, as is also their proximity to Quigley Soda
Springs (Lake 27, p. 195), which issue within a quarter of a mile of
the fresh-water springs.
LYONS SPRINGS (LAKE 22).
A supply of water for domestic u,<=e is furnished by springs at the
home of Mrs. J. H. Lyons, on the hillside overlooking Clear Lake, 6
miles north of Lakeport. The water issues along the side of a swale
and forms a small marshy area a short distance back of the house. A
part of it is lifted into a storage tank by a hydraulic ram. The water
seems to be of surface origin and to be supplied by the precipitation