Round Rock, 15 minutes north of Austin in the hill country of central Texas, has seen its share of change since it was founded in 1851. The community, a major hub for cattle drives in the 1800s, is now a technology center for companies like Dell Computer.Once a sleepy town of 1,000 residents, Round Rock is one of the fastest-growing cities in Texas, with more than 90,000 people. During the late 1980s, the city began expanding its water infrastructure, installing more than 100 miles of asbestos cement water lines and hundreds of miles of blue polybutylene service lines to accommodate
