The Wastewater Department began its Annual Manhole Rehabilitation program again this fall. Aging sewer manholes throughout the city made from brick, concrete, fiberglass, or a combination of the three, need attention. Manholes suffer cracks, breaks or separations caused by age, ground shifting, and excessive weight from traffic, allowing groundwater to enter the sewer system. This equates to lost money and an inefficient system.
In 2004, the Wastewater Department started using information obtained from sanitary sewer surveys to attack leaking and failing manholes. A yearly program was implemented to identify failing structures so they could be rehabilitated by spray lining. These photos show manholes treated with spray lining.
The city currently budgets $65,000 annually to rehabilitate these failing structures, equating to approximately 30 to 50 manholes each year. Spray lining is a cost-effective, non-intrusive way of saving our sewer infrastructure. The products used provide a long-lasting, leak-free barrier. Our goal is to provide money saving efforts in keeping our infrastructure up-to-date and maintained. The Wastewater Department also tries to keep up with changing technology to cause the least amount of service disruption and give the longest life possible out of our system.