Rio Vista Gas Field
The Rio Vista Gas Field is a large natural gas field in the Sacramento–San Joaquin River Delta in northern California, adjacent to Rio Vista, California. Discovered in 1936, and in continuous operation since, it has produced over 3.6 trillion cubic feet (100 km3) of gas in its lifetime, and retains an estimated reserve of approximately 330 billion cubic feet (9.3×109 m3). In 2008 alone, the most recent year for which data was available, it produced 18 billion cubic feet (510,000,000 m3) of gas. Spanning portions of three counties and covering over 29,000 acres (120 km2), it is the largest natural gas field in California, and one of the fifteen largest in the United States.
As of 2009, the primary operator on the field was Rosetta Resources of Houston, Texas, which owned 171 of the field's 189 active wells. The remaining 18 were run by several smaller operators, including Towne Exploration, Royale Energy, and Tri-Valley Oil & Gas.
The gas field underlies portions of Solano, Sacramento, and Contra Costa Counties, in the bottomlands of the Sacramento – San Joaquin River Delta as well as some adjacent upland areas in the Montezuma Hills. The town of Rio Vista is entirely surrounded by the gas field, and the large 3000-home Trilogy retirement community, north of Rio Vista, is on the field's northern boundary. Additionally, the city of Isleton is on the gas field near its eastern border with the River Island Gas Field. Several state highways intersect the field, providing primary surface transportation through the area. California State Route 12 crosses the gas field from west to east, bridging the Sacramento and Mokelumne Rivers; and California State Routes 84 and 160 cross the field from north to south, with Route 160 built on levees much of the way.
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