Page 47 - 1915, Springs of CA.

HOT SPRINGS. 45

JACUMBA SPRINGS (SAN DIEGO 19).
The southeastern portion of San Diego County is largely a rolling
plateau-like granitic area. A few miles east of the divide that sepa-
rates the coastal drainage from that of the Colorado Desert and
within half a mile of the Mexican boundary are situated the Jacumba
Springs. In 1908 the water issued at two main points near the* chan-
nel of a small creek. Heavy rains in 1891 and slight earthquake shocks
in 1892 and 1900 altered the position of the outlets to some extent,
but the total yield, perhaps 15 gallons a minute, has remained about
the same. The water is 96° in temperature, is slightly sulphureted,
and is soft and excellent for laundry and bathing. A small ranch
and supply store are situated here, and the location of the springs,
together with the accommodations afforded, make the place a wel-
come camping spot for travelers between Imperial Valley and the
coastal settlements.
The springs were formerly used by a group of Indians, who within
recent years have made their camp near similar springs a few miles
to the southeast across the Mexican boundary. They are said to
designate their present springs as Jacumba and to call those to the
north Jamati.
Though no extensive fault is mapped as passing near these springs,
local faulting, which is indicated by the effect of earthquakes at
this place, suggests that deep fracturing of rocks here permits the
escape of thermal water. The springs are only half a mile beyond
the southern boundary of a small area of lava, however, whose pres-
ence suggests another cause for the existence of thermal springs in
this region.
WARNER HOT SPRINGS (SAN DIEGO 4).
Warner Hot Springs are situated on the eastern side of Warner
Valley, near the base of Palomares Mountains in the northern part
of San Diego County. Half a dozen or more vents here appear in a
ravine and discharge about 150 gallons a minute of water whose
maximum observed temperature is 139°. The place has long been
known to the Indians and Mexicans as Las Aguas Calientes (the hot
waters) and hence it has been sometimes confused by strangers with
Palm Springs and with those in the valley of Vallecito Creek (San
Diego 9, p. 46; Riverside 11, p. 40), which are also known as Aguas
Calientes. For many years a band of Indians made their home here
and their mortars for grinding acorns have been worn in the bowlders
close to the springs. In 1904, however, the Indians were removed
to the Pala Reservation and since that time a resort has been built
up at the springs. In 1908 there were about 20 adobe cottages
and an equal number of tents, the former Indian school building