Preview our new website

Lifecycle of a project -Construction

Construction: takes 5-plus years 

Sound Transit and its contractors balance the need to complete the project on time and on budget while minimizing construction impacts to the community. Construction time varies widely from project to project.

Some of the factors that can influence the schedule:

  • Large projects are technically challenging with numerous regulatory and other constraints.
  • External factors such as labor disputes, material shortages, unforeseen site conditions and weather can slow a project.
  • Especially complex or challenging projects, such as tunneling, can take seven years or more.

During this phase we're committed to maintaining open communications with the community and there are multiple opportunities and ways to stay informed.