190 EECORD OF DEEP- WELL DRILLING FOR 1905. 
Feet. 
Blue clay; landed 10-inch drive pipe at 736 feet to shut off fresh water from 
oil sand. 724- 745 
Brown sand; show of oil 745- 746 
Blue clay 746- 752 
Sand and shells 752- 765 
Light shells 76.5- 773 
Light sand ; show of gas and oil. 773- 790 
Blue clay 790- 800 
Light sand; show of oil 800- 805 
Blue clay 805- 822 
Brown sand; show of oil 822- 825 
Blue clay 825- 840 
Brown sand; show of oil and gas. 840- 855 
Blue clay. 855- 870 
Light sand; show of oil and gas 870- 925 
Brown shale 925- 946 
Light sand; oil-bearing 946- 982 
Brown sand ; oil bearing at 982-990 and 1 ,00.5-1 ,024 feet 982-1 , 024 
Blue clay 1, 024-1, 030 
Light sand; oil-bearing 1, 030-1, 077 
Brown shale 1, 077-1, 094 
Blue clay 1, 094-1, 105 
Brown sand; oil-bearing 1, 105-1, 111 
Light sand; oil-bearing 1, 111-1, 130 
Blue clay 1, 130-1 , 132 
Light sand 1, 132-1, 142 
Shells and gravel; oil-bearing. 1, 142-1, 147 
Light sand ; oil-bearing 1, 147-1 , 178 
Blue clay 1, 178-1 , 180 
Casing perforated from 1,163 to 1,030 feet, 8 inches apart. Initial production, 180 bar- 
rels per day. 
!()."». Well at Orange, Orange County. 
[Well begun and completed July, 1904. Authority, A. K. Small, superintendent Orange city water 
system. No samples.] 
This well is outside the original artesian area of the eastern coastal plain region of 
southern California. The many wells put down draw their supply from a common source — 
ilir saturated sands and gravels lying between the Puente Hills and the sea. These beds 
are of recent age and were deposited in a bay that extended up Santa Ana River Valley. 
A long list of wells and a general account of the conditions governing the underground 
supply of this area are given in Water-Supply Paper No. 137, "Development of under- 
ground waters in the eastern coastal plain region of southern California," by W. C. 
Mendenhall. 
Record of well 1 mile east of Orange post-office. Feet. 
Gravel 0-40 
Clay 40- 80 
Cement gravel 80-90 
Clay 90-120 
Gravel, with some water 120-19 
Clay 130-lj 
Gravel; water-bearing 1 58-166 
Clay 166-li 
Gravel; water-bearing 184-19C 
