Facilities staff: failed dry well under stadium bleachers stabilized; long-term fix deferred until after fall sports

Chris, a district facilities staff member, described a failed stormwater structure beneath the home bleachers at the high-school stadium that caved in and undermined the steel manhole and concrete rim. Engineers used a grout material to fill the void as a temporary stabilization measure.

"The manhole, the steel manhole and the concrete rims that sit on top of the brick structure fell," Chris said, explaining that 50 years of freeze-thaw cycles degraded the original brick-lined dry well. He told the board the temporary grout fills the void and is chosen for removability when a permanent repair is planned.

Chris said longer-term work—including wetland delineation and borings to determine water-table depth—is underway and that the district anticipates deferring a permanent solution until after fall sports to avoid disrupting the season. He outlined possible permanent options: expanding an offsite retention pond, creating underground retention beneath a parking lot (large baffles), or other engineered retention solutions based on soil and hydrology findings.

Board members asked technical questions about impervious-surface limits and the likelihood of future collapses; Chris said the field can remain in use with the temporary repairs but that future heavy rain events could reveal other failing dry wells and that the district will continue monitoring. He noted the facility is closed for now as a precaution in the immediate area of the failure.

The engineer's soil and wetland studies will determine which permanent design is feasible and the district will return to the board with further recommendations after those studies are complete.