The first post office opened on 1 November 1851, the first to open in a Victorian gold-mining settlement. Parts of the district were first surveyed by William Urquhart as early as October 1851. By 1852 his grid plan and wide streets for land sales in the new township of West Ballarat, built upon a plateau of basalt, contrasted markedly with the existing narrow unplanned streets, tents, and gullies of the original East Ballarat settlement. The new town's main streets of the time were named in honour of police commissioners and gold commissioners of the time, with the main street, Sturt Street, named after Evelyn Pitfield Shirley Sturt; Dana Street named after Henry Dana; Lydiard Street after his assistant; Doveton Street after Francis Crossman Doveton, Ballarat's first gold commissioner; Armstrong after David Armstrong; and Mair Street after William Mair. These officials were based at the government encampment (after which nearby Camp Street was named), which was strategically positioned on an escarpment with an optimal view over the district's diggings.