the fluid level in the upstream portion by transferring the fluid from the chamber to a predetermined remote location application_number US 90895010 A description in this specification the term u201c sewage u201d or u201c sewer line u201d refers to any subterranean fluid path in a conductor regardless of the type of fluid for instance the principles of the invention are equally usable with waste sewage or storm sewage or both fig1 is a top view of a diversion chamber 100 formed in the ground to access a sewer line 200 which in the case of fig1 is a tubular member the chamber is a relatively large diameter typically 20 feet and is either constructed over an existing large diameter sewer pipe 48 inches in diameter for example or constructed at the time the sewer is originally installed the chamber 100 is made of reinforced structural concrete usually by driving piles in the ground and then using the inwardly facing surface of each pile to form the wall 110 of the chamber the interior walls are lined with a non corrosive material 120 like pvc to prevent corrosion the location of the chamber is typically adjacent to and just upstream of a pump station wet well or influent junction box that might need to be taken off line at any time the most likely candidate for a diversion chamber is a lift station at a sewage treatment facility where current methods of diversion cause the most disruption in another instance a chamber might be built upstream of a problem area of sewer pipe due to breakage or collapse or even to bypass a section of sewer while unrelated road or other.