ST3 Cost Estimating

ST3 Cost Estimate

Seattle, WA

Seattle, WA

Program Management and Controls


Triunity is the prime consultant leading an independent cost estimate assessment and methodology review for the ST3 plan – the expansion of Sound Transit’s Link Light Rail and Bus Rapid Transit system. Our project controls/cost estimating experts are currently providing review, analysis, and recommendations of the original, intermediate, and current ST3 plan cost estimates and oversee all specialty estimators for the following projects: West Seattle and Ballard Link Extensions (WSBLE), Tacoma Dome Link Extension (TDLE), Operations and Maintenance Facility – South (OMFS), Bus Rapid Transit: I-405, SR-522, and Bus Base North (BBN). Analysis included in-depth review of various cost estimates and potential alignments for these major extensions, including above, at-grade, and below grade options.