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McKinley Street grade‑separation project moves toward mid‑summer completion, city says
Summary
Project engineers told the council that major underground and ramp work is largely finished, crews are completing last water‑line and retaining‑wall work, and full project completion is expected mid‑ to late‑summer; staff reiterated detours and temporary transit routing while work remains.
Engineers and the project consultant updated the City Council on construction progress for the McKinley Street grade‑separation project and outlined remaining work and detours.
Senior engineer Alan Zhang and Josh Cosper of Mark Thomas said crews completed major intersection and ramp work in late 2024 and early 2025, finished much of the bridge access and completed the Samson Slip ramp. Zhang said drainage and water quality basin work and most retaining walls are in place, and that “we are nearly at a point where all of the project drainage improvements have been installed.”
Cosper said the current critical‑path work is the 30‑inch transmission water main tie‑in and the associated chlorination and flushing; crews are preparing a timed connection to minimize service interruptions. He told the council “we are progressing very well” and said that after the waterline work crews will perform backfill, paving and final surface features. Cosper estimated construction would be complete by mid‑ to late‑summer, with a ribbon‑cutting to follow.
Staff reiterated ongoing detours and alternative routes while surface and finishing work continue. Cosper recommended motorists and bicyclists use the Corona Cruiser shuttle service rather than attempting to walk or bike through active construction zones near McKinley. City outreach staff reported more than 88 business contacts, a twice‑monthly newsletter with 13,000 subscribers and a project text program with over 500 subscribers; staff will maintain live interactive maps and routine aerial drone footage to keep the public informed.
Council members asked about right‑of‑way status and remaining property access negotiations; staff said two remaining properties and business owner negotiations were active and that staff would continue to update the project status on the city website.
No vote was required; the presentation was informational and staff will return as project milestones are reached.
