area, many of whom squatted on unwatched portions of the vast Sutter lands or stole various unattended Sutter properties or belongings. For Sutter, his employee's discovery of gold in the area turned out to be a bane. By December 1848, John Sutter Jr., in association with Sam Brannan, began laying out the City of Sacramento, south of his father's settlement of New Helvetia. This venture was undertaken against the wishes of Sutter Sr., but the father, being deeply in debt, was unable to stop it. For commercial reasons, the new city was named "Sacramento City" after the Sacramento River. Sutter Jr. and Brannan had United States Army Captain William H. Warner assigned to draft the official layout of the city, which included 26 lettered and 31 numbered streets (today's grid from C St. to Broadway and from Front St. to Alhambra Blvd.) Relations between Sutter and his son became embittered after Sacramento became an overnight commercial success. (Sutter's Fort, Mill, and the town of Sutterville, all founded by John Sutter Sr., eventually failed). Residents of Sacramento adopted a city charter in 1849, which was recognized by the state legislature in 1850. Sacramento is the oldest incorporated city in California, incorporated on February 27, 1850. On January 10, 1850, a flood occurred that devastated the city. The rushing waters uprooted homes and drowned livestock. The city was almost destroyed. Due to the efforts of Hardin Bigelow, Sacramento's first elected mayor, the construction of the city's first levee was completed in early 1852 (the city became known as “The Levee City”). However, a month after it was completed, it was breeched during the first major storm of the season and the city flooded again. A new levee was built for $50,000, but it also broke, causing more flooding of the city. Between October and December 1850, Sacramento was hit with a cholera epidemic that killed 1000 residents, including Mayor Bigelow and 17 of the city's 40 physicians. Up to 80 percent of the populace left town. On November 2, 1852, a fire known as the Great Conflagration burned more than 80 percent of the structures in the city. It is estimated that the total damage was around six million dollars. Within a month 761 structures were re-built, many of them in brick. In spite of all these hardships the new city's location just downstream from the Mother Lode in the Sierra Nevada