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  1. 9/10/2010 NEW EQUIPMENT IMPROVES INSPECTION PROCEDURES OF LARGE DIAMETER SEWER MAINS
  2. Throughout the District there are nine sanitary sewer mains called “interceptors” which range in size from 15” to 60” in diameter.  These interceptors collect wastewater from large segments of the District and transport it to the Littleton/Englewood Wastewater Treatment Plant for treatment.  The amount of flow ranges from .5 million gallons per day up to 11.5 million gallons per day.  This can make maintaining and inspecting the interceptors a challenge.
     
    Recently, the District purchased a Pipe Ranger.  It is a self-propelled, steerable camera transporter for large diameter pipes.  A unique feature of the Pipe Ranger is the operator’s ability to raise the camera when the flow level rises as the inspection is being performed.  Transporters used in the past did not have the ability to raise the camera, resulting in less than satisfactory video records.  The pictures below show the camera in the “home” position and in the “raised” position.
     

     

    This summer, District crews discovered a section of concrete pipe severely corroded due to hydrogen sulfide gas.  Because of the improved inspection procedures, actions were taken to repair the damaged sewer interceptor before a catastrophic failure occurred.
     
    If you have questions regarding inspections of sewer mains or any other District activity, please feel free to contact Scott Hand, Operations Supervisor, at 303-979-2333.