ADVANCE FOR USE IN WEEKEND EDITIONS OF SEPT. 1-2--A bridge spans the Colorado River as it runs near the town of Rifle, Colo., in this photograph taken on Thursday, April 19, 2007. Rifle, which is a hot spot of natural gas exploration in the intermountain West, is sagging under the weight of changes brought on by an influx of new residents who are putting increased demands on services in the rural region. (AP Photo/Judith Kohler)