Tunneling under Seattle – Aconex energizes state route 99 project

Project name: State Route 99 Tunnel under Seattle | Industry: Road & RailProject size: US$1.4 billion | Location: Seattle Washington, U.S.A.

Seattle Tunnel Partners (STP) is a joint venture between Dragados USA and Tutor Perini Corporation, two top-tier construction firms whose portfolios include large public works projects throughout the U.S. and worldwide. STP is building the State Route 99 Tunnel – two miles long and 58 feet in diameter – under downtown Seattle so that the Washington State Department of Transportation (WSDOT) can demolish the earthquake-damaged Alaskan Way Viaduct. The project team consists of 330 individuals across various disciplines and organizations – including WSDOT, tunnel designer HNTB Corporation, local municipalities, and a number of subcontractors and consultants. More than 580 outside vendor contacts are participating in the project.


  • Project team of 330 across various organizations and disciplines and more than 580 vendor contacts.
  • Cross-company coordination of complex project documentation between document control centers.
  • Original document control system with limited transmittal management, document version control and search capabilities.
  • Risk of project information being incomplete and difficult to find and use.


  • Single platform for document management, viewing and control; bidding and tendering processes; and correspondence management.
  • Ability to manage a complex exchange of documents and other project information between multiple stakeholders.
  • Tracking of all invitations and responses to RFPs.
  • Easy document search and retrieval for public RFIs and disclosures.
  • Confidential management of all vendor communications, with a complete audit trail.


  • All project team members up and running in 3-4 weeks.
  • Automation of document control and management for more than 100,000 project documents.
  • 75% reduction in time required to generate weekly reports.
  • 90% faster creation of document transmittals.
  • 50% faster document uploads.
  • Savings of 20 hours of staff time a week.
Back to projects

Related projects

Oil & Gas

Vista Projects operates in the oil sands and conventional oil and gas sectors

Vista Projects

The total cost of ownership savings for a product like Aconex is really significant.

Patrick Reilly
Technology Manager

Health & Education

US$390 million
New research center at the University of Montréal

University of Montreal Hospital

Aconex allows our team to focus less on managing information and more on delivering the project.

Eric Lessard
Director of IT, Pomerleau