The Temecula Valley (Figure 26) will be the focus of most of the region’s development-conservation conflicts. This is particularly true for the areas in the Santa Margarita watershed. By the year 2010, it is estimated that 250,000 people will move to the valley; by 2030, 500,000 people will have moved to the area. Such population pressures will drive a large market incentive to build wherever developable land is available. Current growth pressures result mainly from single-family housing as it spreads north from Temecula and Murrietta and south from Riverside, Sun City, and Perris. Perpetuation of the current trend to 2030 will lead to certain urban sprawl and landscape fragmentation–a situation the design proposal seeks to avert. (Figure 27)