posted on 7/25/2025

The City of Dover’s 4-million-gallon water tank on Garrison Hill is back online as of Thursday afternoon, improving Dover’s water storage capacity to 5 million gallons. The city is no longer requesting residents to conserve water by reducing or eliminating outdoor irrigation, though mindful water use is always encouraged.

The $2.88 million rehabilitation of the Garrison Hill water tank project began in March, the first time the critical infrastructure workhorse had been drained, inspected and repaired since it was built in 1968. The tank was originally projected to be online in June before the start of the high-demand summer season; however, higher-than-normal spring precipitation created additional moisture and condensation within the tank, delaying aspects of the project.

The rehabilitation began with a structural analysis. Crews then repaired the tank’s walls, dome, and floor, and applied specialized coatings and sealants. In addition to structural repairs, the city has replaced piping and installed a new mixing unit to improve water quality. The project contractor will continue to complete the remaining project work in the coming weeks.

For more information, contact Community Services at 603-516-6450.