Administration recommends Eleventh Avenue I‑90 overcrossing; committee asks for broader council review before endorsing

City staff presented the Central Issaquah multimodal I‑90 crossing study to the Mobility and Infrastructure Committee on June 17 and recommended an overcrossing connecting Eleventh Avenue Northwest on both sides of I‑90 as the preferred alternative. The administration asked the committee to endorse the location and the overall crossing approach before advancing to the full City Council.

Public Works Senior Transportation Engineer Greg Lucas, with consultant John McKenzie of Jacobs, described a process that started with five alternatives and, after environmental and constructability screening, narrowed to three refined options. Lucas said the Eleventh‑to‑Eleventh overcrossing "meets the project goals and evaluation criteria by a decent margin," provides the greatest flexibility for a future light‑rail station and park‑and‑ride footprints, and offers the most constructible and fundable path among the options presented.

The administration provided planning‑level figures: a draft cost estimate of roughly $110 million and a multi‑decade schedule that anticipates completing design milestones…