Subsequent to Sewer Collections maintenance staff pipe inspections, severe deterioration of several existing gravity mains was 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 lined had extensive cracking, infiltration of water, sand, and root intrusion. Further deterioration of the gravity mains identified would have resulted in damage to streets and right of ways if not corrected. In addition, pipe conditions were the direct result of higher sewer lift station pump run times which increased the utilities operating and maintenance cost for equipment repair and treatment of the effluent. Finally, one stormwater pipe was lined in the North River neighborhood. Several depressions had opened up above the pipes and inspections verified the defective conditions that created the need for pipe lining.
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, 3,305 LF of eight-inch CIPP was installed and 51 sewer lateral reconnections were performed. Finally, 200 LF of 15” reinforced concrete pipe RCP was lined.