WATER SUPPLIES. 79 
Log of railroad well at Drake, Ariz. 
Feet. 
Sand and bowlders 0- 45 
Brown sand 45- 90 
Bowlders 90-160 
Brown sand 160-178 
Sand and gravel 178-223 
Black lava 223-308 
Yellow sand 308-368 
Black lava 368-408 
Flint 408-414 
Black lava 414-419 
Gray granite 419^175 
Black lava 475-483 
"Gray granite, " water bearing 483-537 
Clay 537-578 
Disintegrated granite 578-603 
Solid granite 603-687 
Yucca. — There are two deep wells at Yucca, situated near Sacra- 
mento Wash. The first was drilled in 18S9 and has been in opera- 
tion since that time. The amount of water obtainable was not 
sufficient for the needs at that point, and a second well has been put 
down to a depth of 1,004 feet. Water is said to have been encoun- 
tered at a depth of 310 feet, but when measured by the writer in the 
new well it was standing at a depth of 346 feet. No special water- 
bearing stratum was encountered below the first, and the additional 
supply is obtained by slow seepage through the sand and gravel. The 
material encountered is as follows: 
Log of railroad well at Yucca, Ariz. 
Feet. 
Cemented sand and gravel 0- 370 
Clay 370- 455 
Gravel 455- 555 
White sand 555- 905 
Granite 905-1, 004 
Haviland. — The well at Haviland is 505 feet deep and is in vol- 
canic material most of the way. Water was encountered at a depth 
of 248 feet and rose 48 feet. The well yields 60,000 gallons of water 
per day, or about 42 gallons per minute. The material penetrated 
is as follows: 
Log of railroad null at Haviland, Ariz. 
Feet. 
Bowlders 0-12 
Lava 12-260 
White volcanic tuff 260-505 
Big Sandy Valley. — Several wells dug in Big Sandy Wash encoun- 
tered water 15 to 75 feet below the surface, according to locality. It 
is reported that a few years ago water was sufficiently near the sur- 
face to seep into the lower places along the bottom of the valley, 
