Robotic cameras utilizing Closed Circuit Television (CCTV) have been used since the 1960s to inspect sewer main lines, but CCTV cameras can only clearly inspect the pipe interior above the water line. Submerged assets such as outfalls, siphons, and force mains have historically been much more difficult to inspect due to the inability to remove these assets from 24/7 service, and due to the technology limitations that hinder a detailed inspection while in service. Consequently, these assets have mostly operated without any inspection, and with very little maintenance, since they were first constructed. However, there are more sophisticated technologies that can provide valuable information about these important submerged assets.
展开▼
