Council approves revised public safety and maintenance facility plan, directs boundary adjustment and rezone work

The Mercer Island City Council on April 15 approved a reconfigured site plan for the proposed Public Safety and Maintenance (PSM) facility and directed the city manager to pursue related property and zoning steps needed to implement the plan.

The revised plan shifts the PSM building north on the old City Hall/Public Works site, consolidates weathering covers and operations to the east, and opens the western portion of the parcel for yard functions. Aaron Young, lead architect for the design team, told council the change “realizes cost savings, increases operational effectiveness, and provides long‑term flexibility.” He said the revised layout avoids deep grade cuts and large concrete retaining structures that a prior design would have required, and yields roughly 70,000 square feet of usable yard area versus about 38,000 in the earlier layout.

Robbie Cunningham Adams, senior management analyst, and Police and Public Works staff described operational advantages: the operations building can be organized on two levels to reduce footprint and lower construction cost, provide space for centralized mechanical systems and future electric‑vehicle conduit, and create room for future expansion on the north end of the site. The revised plan provides more vehicle/equipment parking than forecast needs (88 provided vs. 70 needed) and increases Mercer Island Police Department secure parking (37 spaces provided vs. 21 needed).

Council voted unanimously to approve the revised site layout and to direct the city manager to continue schematic design work and return with a revised cost estimate in June. Separate unanimous approval authorized staff to pursue (1) a boundary line adjustment between the Northern City Hall parcel and the Southern Public Works parcel based on the final site layout and (2) an application to rezone the southern parcel to a public‑institution zone that better fits the facility use. Staff advised the rezone would go through the Planning Commission and that a future reversion of the zoning would require the same legislative process if funding did not materialize.

City staff and the design team said the changes are intended to reduce construction cost by avoiding high, costly retaining walls, to improve day‑to‑day operations, and to leave an approximately 1.5‑acre reserve area on the north end of the site for future facilities. Council directed staff to return in June with schematic design and an updated cost estimate.