Subsequent to Sewer Collections maintenance staff pipe inspections, severe deterioration of several existing gravity mains have been identified in the North River, the Heights, Oak Hill Heights, and Edgewater Gardens neighborhoods and along the US Hwy 19 corridor. All of the gravity mains proposed to be lined have extensive cracking, infiltration of water, sand, and root intrusion. Further deterioration of the gravity mains identified may result in damage to streets and right of ways if not corrected. In addition, the current pipe conditions are the direct result of higher sewer lift station pump run times which increase the utilities operating and maintenance cost for equipment repair and treatment of the effluent. Finally, two stormwater pipes have been identified in the North River neighborhood as in need of lining. Several depressions have opened up above the pipes and inspections have verified the defective conditions.
As Council is aware, this type of project has been included annually in the Public Works Capital Improvement Program as a continual proactive approach to rehabilitate an aging infrastructure. This type of rehabilitation method has a considerable reduction in cost from traditional pipe laying construction because it eliminates the cost of restoration and allows the existing facilities to remain in place with no disruptions to the general public. For this project 114 linear feet (LF) of six-inch cured-in-place-pipe (CIPP), 2,975 LF of eight-inch CIPP will be installed, and 51 sewer lateral reconnections will be performed. Finally, 200 LF of 15” reinforced concrete pipe RCP and 300 LF of 36” RCP will be lined.