The Pomona to Claremont A Line Extension is underway with final design and pre-construction. The project’s design team, Parsons, is currently working to advance the project design towards its next milestone of 60%, following last month’s completed review of the baseline 30% design submittal. The 60% design submittal is anticipated to be ready for review in early January 2027. From there, the design will progress to 85% and 100% before reaching “Approved for Construction” drawings.

Photos: Survey crews collecting data for the project design at Claremont Metrolink Station (top) and at Indian Hill Blvd. (bottom)

To support the design effort, Parsons continues to deploy surveying crews throughout the 2.3-mile corridor to collect data on existing utilities, drainage, track slope elevations and other existing conditions – information that will help refine the design as it advances. This month, as seen in the photos above, surveyors were out in the mid-blocks and at the grade crossings to collect data. They were also out at the Metrolink Station in Claremont.

As Parsons continues their work, the project’s contractor, SSH Joint Venture (“SSH JV”), is supporting the project by providing constructability reviews and other reviews of the design, working with the Construction Authority to find ways to reduce costs on the future construction effort, developing an overall construction schedule and methodology for estimating the construction costs, preparing programmatic plans, conducting field reviews and developing early work package recommendations. All of this is part of the pre-construction phase of their work that will be ongoing through all of 2026 and much of 2027.

As a reminder, SSH JV is under contract for the initial pre-construction work phase and will have the opportunity to negotiate a construction contract with a guaranteed maximum price once the design reaches 85%. That process will conclude in Fall 2027, with major construction of the Pomona to Claremont A Line Extension expected to begin in late 2027 and take approximately four years.