This project is in the Plan, Specification and Estimate (PS&E) phase, which includes final design updates and Environmental Revalidation, and is anticipated to end in late summer 2021. As part of this process, a PS&E report will be developed to account for refinements to elements of the SR-57/SR-60 Confluence Project FEIR, to quantify the cost implications for the current updates, and to guide construction for improvements.
Construction, led by the San Gabriel Valley Council of Governments (SGVCOG), is anticipated to begin the middle of 2022. Environmental Revalidation began in late 2018 construction to start in middle of 2022 and complete in late 2026. Project website and collateral information will be updated through construction.
Schedule
Environmental Revalidation began in late 2018 construction to start in middle of 2022 and complete in late 2026. Project website and collateral information will be updated through construction.
| Milestone | Date |
| Initiate Environmental Revalidation | Late 2018 |
| Conclude Environmental Revalidation | Mid 2021 |
| Construction | Mid 2022 – Late 2026 |
| Other related active projects within the area | |
| Diamond Bar Golf Course Renovation Construction | Early 2021 – Mid 2022 |
| Grand/Golden Springs (Grand/GSD) Construction | Early 2020 – Mid 2021 |