Aug 2, 2012 7:33 PM
TUCSON - The section of Silverbell Road destroyed by a powerful monsoon storm on June 29 is expected to be repaired by August 8; the estimated cost of the repairs is $200,000.
On June 29, rain gauges upstream from Silverbell Road in the Idle Hour Wash watershed recorded 2.5 to 3.8 inches of rainfall in two to three hours - the area's most damaging storm since the flood of 1993, according to a news release from the Pima County Department of Transportation. The peak flow of the Idle Hour Wash was 5,800 cubic feet per second, which is equal to a 100-year storm, according to the Regional Flood Control District's evaluation.
The surge of water eroded the embankment and soil beneath Silverbell road, just north of Sunset Road. Silverbell Road was closed between Sunset and Panorama, and remains closed at this time, the DOT release states.
Crews have already repaired the embankment and will install a new cut-off wall on the east side of the road, designed to protect the roadway from erosion. Beginning this weekend, the county will install 600 feet of new pavement, the release states. The roadway will reopen to traffic, but construction activity will continue along both sides of the road.