Hooksett water precinct: storage adequate now but sourcing could limit growth; test well planned

Hooksett Village Water Precinct officials reported to the Hooksett Tax Increment Finance Commission that while storage capacity is currently adequate, the system faces source limitations that could constrain future development unless new wells are developed.

Todd Smith, Hooksett Village Water Precinct chair, and Mike Heidorn, precinct superintendent, described recent capital work and an ongoing search for new sources. "This tank acts as an integral part of a 2 tank system. We provide through those 2 tanks 1,400,000 gallons of storage and fire protection to the TIF district and other areas," Heidorn said, noting the Thompson Corner tank was recently replaced at double the prior size.

Staff said storage and distribution upgrades recently completed or underway include the Thompson Corner tank replacement, the Vista Drive project, and Granite Woods off-site work. Heidorn said the precinct's combined permitted capacity exceeds projected average-day demand, but the configuration and seasonal variability mean available yield can fall short during late-summer peak days.

Heidorn and Smith described four candidate source areas under study and said a test well on a South-End-of-Route-3A parcel would be staked next week. "My hopes are high. But we're a long way from finishing that," Heidorn said of the planned test well. Officials added the Heads Pond site remains uncertain because some parcels in that area are now in conservation as part of mitigation for prior developments, complicating access.

Precinct staff warned of single-point vulnerabilities: older wells with limited historical yield data; heavy dependence on pond levels that can fall during drought and limit well output; and limited emergency interconnection capacity with Manchester Water. Heidorn said the precinct has discussed options such as diverting river water to stabilize pond levels but said such measures require further study and permits.

Commission and town staff also discussed a sewer-capacity solution tied to development: Bruce Thomas, town engineer, said the sewer commission identified an approximately $1,000,000 sewer main upgrade on or near the Cigna parcel that, if funded and paid for in part by developers, would create the capacity needed for several planned subdivisions. Thomas and precinct staff said the town will approach multiple developers to share the cost so that individual contributions are smaller.

What this means: Precinct officials said current storage is sufficient for normal conditions but the system could struggle with late-summer peaks if large new housing development proceeds without new source capacity. The planned test well and coordination with developers on sewer upgrades are critical steps staff identified to keep infrastructure aligned with planned growth.