Kettleman North Dome Oil Field

The Kettleman North Dome Oil Field is a large oil and gas field in Kings and Fresno counties, California. Discovered in 1928, it is the fifteenth largest field in the state by total ultimate oil recovery, and of the top twenty oil fields it is the closest to exhaustion, with less than one-half of one percent of its total original oil remaining in place.

The Kettleman North Dome occupies the northernmost portion of the Kettleman Hills, a northwest-southeast trending line of hills about 30 miles (48 km) long which parallels the San Andreas Fault to the west. The range consists of two elongate "domes", the North Dome and Middle Dome; a portion of the Middle Dome is sometimes called the "South Dome," although the North and Middle Dome are the most topographically distinct. Both the North and Middle Domes overlie oil fields.

The Kettleman Hills is named, and misspelled, after Dave Kettelman, a pioneer sheep and cattle rancher who grazed his animals there in the 1860s. The hills, which rise to an elevation of approximately 1,200 feet (370 m), divide the San Joaquin Valley on the east from the much smaller Kettleman Plain to the west. They are discontinuous, as indicated by their name ("hills" rather than "ridge"). The predominant vegetation in the hills is grassland, with surrounding areas containing grassland, low scrub, orchards, and agricultural fields. The climate is arid, with 6 to 12 inches (300 mm) of precipitation per year on the average, all falling as rain. Summers are hot, with daily highs regularly exceeding 100 °F (38 °C) in the summer months, and winters are cool with occasional freezes.

Interstate 5 parallels the range of hills to the northeast, and SR 33 to the southwest. SR 41, which runs from Paso Robles to Kettleman City to Fresno, crosses the hills at the southern extremity of the North Dome, and SR 269, which connects the town of Avenal to Interstate 5, crosses the hills in the middle of the North Dome.

...
Wikipedia