Sutter-Yuba County Biographies This file is part of the California Genealogy & History Archives http://www.rootsweb.ancestry.com/~cagha/index.htm JAMES O�BRIEN An honorable place among the representative citizens of Sacramento Valley was accorded the late James O�Brien, who was identified with the mining interests of California for over half a century. When he came to the State in 1853, like the great majority of emigrants of that time he brought nothing to presage the successful career which was to be his; but with the courage of youth, the optimistic nature inherited from his Irish forefathers, and the ability to grasp and make use of the manifold opportunities presented, he overcame all obstacles and compelled fruitful returns for his efforts. A native of County Cork, Ireland, Mr. O�Brien was born May 28, 1830, and when fourteen years of age was brought to the United States by his parents. They settled in Westfield, Mass., and in that locality he was employed at farming for about nine years. Resolving to take a part in the stirring scenes being enacted in California, he left Massachusetts in May, 1853, and came to the Pacific Coast by the Nicaragua route, arriving in San Francisco on July 6 of the same year. He made the trip thence to Marysville by steamer, after which he went to Baron�s Bar, on the Yuba River, in Yuba County. He spent the summer in the mines and the winter seasons in prospecting. For four years he remained so occupied and in the meantime became interested in the irrigation project of this section, and built the Oroville ditch by contract. In 1858 he built the Boyer ditch, a distance of twenty-five miles, extending from Deer Creek to Smartville, and the following year built the Excelsior ditch, from south of Yuba to Smartville, a distance of about thirty-four miles. In the fall of 1859 he contracted and built the Knights Landing road to Putah Creek, extending across Yolo County, and in this way was largely identified with the development of this part of the State. In the fall of the next year he came to Smartville, Yuba County, and bought mining property, and shortly afterward was associated with Prof. William Ashburner and Messrs. Walker, Baker and Hague, of San Francisco, in the building of the Pactolus tunnel, at a cost of $80,000. Of the ten shares, Mr. O�Brien was the owner of five, and was accordingly made superintendent of the mine, which he operated successfully for some years, after consolidating with the Excelsior Water & Mining Company. With the added responsibility he continued in the position for a period of four years, when the property was sold to Eastern capitalists. About 1880 the Sawyer decision stopped mining by the hydraulic process, thereby causing Mr. O�Brien considerable loss. Withdrawing to a large extent from mining operations, he then turned his attention to farming. Purchasing a tract of 6200 acres of land along the Yuba River, in Yuba County, he began ranching and stock-raising. The dredging operations at Hammonton and Marigold are conducted on some of the land formerly owned by Mr. O�Brien. He also became interested in the Nevada and Marysville Water & Power company, which is now the Yuba River Power Company, the builders of the Bullards Bar Dam and the projectors of several other large projects. In October, 1860, Mr. O�Brien was united in marriage with Miss Mary Kirby, a native of Ireland, whom he had met before emigrating to the West, and who made the trip to California to become his wife. She died on November 13, 1894, leaving a family of eight children. Mr. O�Brien was a Democrat in his political convictions, and with his family was a communicant of the Catholic Church. History of Yuba and Sutter Counties, Historic Record Company, Los Angeles, 1924 p 1091