King County completed major construction on the 277th Street Bridge Replacement Project on Friday, November 19, 2021. All lanes of traffic are now open.
Monday, November 22, 2021
Major construction on this project is now complete, and all lanes of S 277th Street are open. The few remaining items of work include restoring plants and bushes alongside the road. The planting work may require daytime single lane restrictions through the end of the month.
En EspañolEsta pagina web - 28 de mayo de 2020 Download PDF document (1MB)
Determinación de no Impacto Adverso Significativo al Medio Ambiente (DNS por sus siglas en Inglés) - Fecha de emisión, 28 de mayo de 2020 Download PDF document (198KB)
This project replaces the 70-year-old S 277th Street Bridge No. 3126 over Mullen Slough with a four-sided concrete box culvert. The 16-foot-long bridge is located on a four-lane principal arterial road that connects Interstate 5 to State Route 167 in Kent and Federal Way.
The second half of the new concrete box replacement culvert is installed on Sept. 16, 2021.
The second half of the new concrete box replacement culvert, in place on Sept. 16, 2021.
The first half of the new concrete box replacement culvert is installed on Sept. 1, 2021. Next, crews will bury this half, rebuild the road on top of it, and move both lanes of traffic over so that we can start work on the second half of this project.
The first section of the new culvert is lowered into place on September 1, 2021.
August 11, 2021 - Steel plates are used to cover the area under S 277th Street that has been excavated. The plates also cover a de-watering system that diverts Mullen Slough away from the construction zone.