1984-03-14 Workshop Meeting - Laserfiche WebLink

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• • CATLETT LANE SEWER - EMERGENCY REHABILITATION FOR THE CITY OF LA PORTE, TEXAS TURNER COLLIE & BRADEN JOB NOS. 26-00021-010 & 011' The Catlett Lane sewer consists of approximately 2,100 feet of 6-inch and 8-inch concrete sewer pipe. The sewer line is located in aback lot easement which is primarily 10 feet in width but necks down to 6 feet at several locations. The back lot easement is heavily congested with utilities, trees, bushes, fences, etc. It is also encroached upon by garages, fallout shelters, and yard buildings. The history of the line consisted of pluggage, failures, charging etc. almost as a daily occurrence. The project goal was to repair the line with minimal impact upon local residents. This was accomplished in a 72-working-day period which was plagued by unseasonable rain, a hurricane, and excessively wet ground for 19 of those days. On. seven more of those days it was also plagued by charging of the Catlett Lane Sewer caused by pluggage in the Farrington Main and problems with the subdivision lift station. The contractor also had to clean the Farrington Main on eight occasions to remove blockage which had caused charging of the Catlett Lane Sewer. The limited right-of-way, the congested easement, and wet ;round conditions all contributed to the necessity to u:~~ hand labor for excavation for entry pits, point repairs, and tap connections. The first step of the project was to clean the lines. Numerous blockages were encountered. These were later found to be caused primarily by dropped service connections. After cleaning, the lines were television inspected. Television inspection of the line from Valley Brook Drive to Piney Brook Drive revealed a deteriorated line with heavy root intrusion. Replacement of this approximately 1,100 foot section would have been very expensive because of the limited access and possible damage to private property. The decision to slip line this section with a 7-inch SDR 21 polyethylene liner pipe seemed to be the only viable alternative. This was accomplished and all the service connections reconnected. The sewer line section from Piney Brook to Farrington was found to be slip lined with 6-inch SDR polyethylene. Cleaning of this section incurred only normal problems; however, television inspection found an obstacle at every service connection. In addition, the television camera would catch at reverse slope (dip) locations. All service connections on this section -1-