Raw Water Tunnel Condition Assessment
Abstract
As part of its risk management plan, the South Central Connecticut Regional Water Authority (RWA) is assessing the condition of its system of raw water conveyance tunnels and connecting pipelines. In 2006, the RWA inspected one of the system’s main tunnels, a 4-mi, 1950s-era tunnel that had not been inspected since its construction. The inspection team prepared extensively for the unknown conditions in the tunnel, and the inspection was completed safely and successfully. This paper describes the team’s pre-entry preparations, dewatering and ventilation efforts, surface-to-tunnel communication, access, physical inspection of the tunnel, and the lessons learned throughout the process. Additionally, this paper will preview planning for the subsequent inspections.
2008
North American Tunneling Conference (NAT) Conference Proceedings
Rafael C. Castro
Jacobs Associates
Brian M. Lakin
South Central Connecticut Regional Water Authority
Glenn M. Boyce
Jacobs Associates
Blake D. Rothfuss
Jacobs Associates
