1. I-35W Bridge Collapse Dan Dorgan Presentation to SCOH Annual Meeting

2. I-35W Bridge History Construction started in 1964 Opened to traffic in 1967 Steel truss deck, 113 feet, 4 inches wide 64 feet high, 1,907 feet long, 14 spans Four lanes of traffic in each direction Carried 140,000 vehicles daily, including 5,700 commercial vehicles $440,740 to construct the piers $4,823,262 to construct the bridge Scheduled for reconstruction in 2020-25

3. I-35W Bridge - Looking North July, 1967

7. Bridge Rating Inspected annually since 1993; before that, was inspected every two years Superstructure rated “structurally deficient” in 1990 This was due to: –Corrosion where the paint had deteriorated –Poor weld details in the steel truss members and floor beams –Bearings that were not moving as they were designed to move –Existing fatigue crack repairs to the approach span beams

8. Maintenance Work at Time of Collapse Replace concrete overlay, repair joints and lighting, and install guardrail Work completed on outside two lanes each direction Scheduled completion date - September 30, 2007 Cost - $9 million Contractor employees and Mn/DOT inspectors on bridge at collapse

9. The Collapse Occurs at 6:05 p.m. Wednesday, August 1, 2007 –Over 100 vehicles were on the bridge at time of collapse –13 fatalities –105 injuries

10. Corps of Engineers video

11. The Response The First 24 Hours

12. Mn/DOT’s Immediate Response 6:05 p.m. - Numerous concurrent calls to State Patrol Dispatch (911) and from field employees to RTMC and Maintenance Dispatch 6:10 p.m. - District Emergency Operations Center activated and DEOC staff report to RTMC Immediate traffic control for ramp and freeway closures provided by FIRST units, maintenance units, and contractors in the vicinity Mn/DOT’s Regional Transportation Management Center (RTMC)

13. Statewide Incident Response 6:20 p.m. – State Emergency Operations Center and Joint Information Center activated. Unified command center set up on collapse site. Authority in command changed as incident progressed: –Mpls. Fire Department in charge of rescue –Hennepin County Sheriff in charge of recovery (Mn/DOT assisted with some demolition) –Mn/DOT assumed command after recovery was completed

14. Emergency Service Response Mn/DOT Metro district provides maintenance staff and equipment Mn/DOT structural engineers called to site Effective response due to communications, planning, equipment, training, and experience with incidents on the Metro area freeway system

15. Traffic Response 6:20 p.m. - began converting temporary traffic control measures to more long term traffic control standards. 20 changeable message signs activated Mn/DOT assisted state patrol and other enforcement personnel Instituted 24-hour staffed traffic control By 7 p.m. – Over 150 employees activated 11:00 p.m. - Detour maps for a.m. rush posted on Mn/DOT Web site Overnight – closed I-35W with temporary barricades and converted Hwy 280 to a freeway.

16. Public and Media Response 6:10 to 8 p.m. continuous Mn/DOT traffic radio coverage Detour maps and info provided on Web and 511 Traveler Information Media briefings, interviews Coordinated responses with other agencies/governor’s office http://www.511mn.org http://www.dot.state.mn.us/i35wbridge/index.html

17. Security Response Mn/DOT safety officers statewide called in Homeland Security & FBI investigate criminal or terrorism potential OSHA ensures safety Navy divers assist recovery U.S. Secret Service for president visit No-fly zone activated

18. Internal Agency Response Employees knew what to do, when to go, who to report to Aug. 2 – Lt. Gov. e-mail to employees Aug. 2 – State employee assistance available Aug. 6 – Lt. Gov./Deputy thank employees Aug. 8 – Tips to employees on handling threats Critical incident stress debriefings provided

19. The Response Local and National

20. Aug. 2 - Governor Tim Pawlenty declares a state of emergency and activates State Emergency Operations Center Governor’s Response

21. U.S. DOT Response Aug. 2 – U.S. DOT Secretary tours site and announces $5 million grant to help pay for early expenses

22. Executive Branch Response Aug. 3 - First Lady Laura Bush visits the site, victims families Aug. 4 - President Bush pledges to cut red tape that could delay recovery Aug. 21 - President declares emergency under Robert T. Stafford Act authorizing funds for safety and recovery efforts President Bush participates in a briefing with Minneapolis Mayor R.T. Rybak and Gov. Tim Pawlenty

23. Congressional Response Congress authorizes $250 million in Emergency Relief money to repair and restore highway facilities to pre-disaster conditions

24. Mn/DOT’s Continuing Response Investigation Inspections Traffic Recovery Bridge Demolition Bridge Replacement Media/Public Responses

25. Continuing Response Investigation

26. The Search for a Cause Cause may not be known for 12-14 months

27. The Search for a Cause National Transportation Safety Board leads investigation Forensic engineering firm assisting investigation Consultant to review inspection procedures

28. Continuing Response Inspection

29. Aug. 2 - Governor directs Mn/DOT to inspect all bridges on the trunk highway system in priority order Aug. 6 – Mn/DOT completes inspection of five bridges with the same arch deck truss design as I-35W bridge Inspection continues of state bridges, structurally deficient and fracture critical bridges priority Aug. 10 – Mn/DOT requests that local agencies and private owners accelerate inspections of their bridges Dec. 1 - Mn/DOT’s goal to complete all state bridges inspections Inspection

30. Approximately 13,600 > 20 ft. long bridges in Minnesota - 3,800 TH, 9,800 local 197 fracture critical bridges in Minnesota – 72 TH and 125 local 34 pin assembly bridges - 15 TH and 19 Local 1,111 structurally deficient bridges – 106 TH and 1,005 local

31. Continuing Response Traffic Recovery

32. Traffic Restoration Work to convert Hwy 280 to a freeway including closing at- grade signalized intersections to cross traffic, upgrading ramp termini signal systems and lengthening frontage road Add lane each direction on I-94 from Hwy 280 to I-35W by overlaying and restriping shoulders Many temporary projects on other Metro alternate routes

34. Traffic Distribution After Collapse

35. Transit Metro Transit assigned 25 extra buses, ridership jumps 25-50% Advised public to “buy bus passes, stagger work hours, carpool” Began studying additional service enhancements Park-and-Ride use jumps after I-35W bridge collapse

36. Continuing Response Bridge Demolition

37. Bridge Demolition and Removal Aug. 6 – demolition begins to aid recovery, Carl Bolander & Sons Co., awarded demolition contract Aug. 20 – recovery completed, site turned over to Mn/DOT Sept. 6 - Navigation channel opened to commercial traffic

38. Bridge Demolition and Removal As of Sept. 26: –Steel removed from river –Corps will sweep channel –Restrictions still on recreational river traffic –Some demolition will continue after Oct. 15 –NTSB on site through end of year

39. Continuing Response Bridge Rebuild

40. 189’ wide 10 lanes of traffic, five in each direction Designed to handle Bus Rapid Transit (BRT) and/or a managed lane (like I-394 MnPASS) Designed to be LRT ready

41. Bridge Rebuild – Design Build Aug. 4 – Design Build teams pre-qualified Aug. 14 – public involvement process begins Aug. 21 – layout submitted to Minneapolis Aug. 23 - RFP delivered to five design-build teams Aug. 23 – all but 3 environmental permits acquired Sept. 19 – project bid letting Oct. 15 - work scheduled to begin Dec. 2008 – projected bridge completion date

42. Bridge Rebuild - Review Process Minneapolis Municipal Consent hearing Sept. 20 Technical Review Committee reviewed proposed design Visual Quality Advisory Committee met with Design- Build teams

43. Bridge Rebuild-Stakeholder Involvement Six open houses Community group Meetings Presentations/listening sessions Meetings with local, state, federal officials E-mail alerts/ notifications Web site, online comment form Handouts at park-and- ride lots

44. Responding to What We Heard Build bridge to accommodate future LRT Build a quality, attractive bridge we can be proud of Mitigate construction impacts Maintain key road and bike accesses Require DBE involvement Keep us involved!

45. Bridge Rebuild-Environmental Review Environmental reviews accelerated due to cooperation among agencies Includes a thorough analysis of the full range of potential environmental issues for all aspects of the project Met NEPA requirements

46. Bridge Rebuild Legislative/Congressional Hearings Aug. 15 – Hearings with Minnesota House and Senate Transportation Committee Sept. 5 – Mn/DOT staff testified before the U.S. House of Representatives Committee on Transportation & Infrastructure

47. Economic factors create urgency to rebuild quickly Daily costs to motorists of additional travel time and distance estimated at $400,000 Reduction in state’s average net economic output is an additional $113,000 per day Bridge Rebuild - Economic Impacts

48. Continuing Response Media/Web info

49. Media and Public Response Media interest worldwide Media briefings, interviews Mn/DOT directed to be transparent in info provided AG’s office required retention of all incident-related data 50+ data practices requests Dedicated I-35W Web site includes all documents

50. Conclusions What Went Right? Lessons Learned?

51. What Was Done Right Employees willing to work, just showed up, returned from vacations Excellent employee response due to experience and training Good coordination with other Governor’s office/other agencies Good work relationship between Mn/DOT and contractor employees Other agencies/states called and emailed offering help Material suppliers speeded up delivery Permits, other documents approved quickly No Mn/DOT employees injured during response and traffic recovery

52. What Worked Right In-place incident management infrastructure Redundancy in RTMC camera/communications systems meant no network breakdowns Improved emergency radio communications Mn/DOT Web site reduced number of requests

53. Issues with Investigation Media, communications between national/local agencies Sharing field office Who had jurisdiction Turning over portions of bridge to Mn/DOT

54. Lessons Learned Consultant onboard to facilitate table top incident review exercise Cell phone service was overloaded Confusion about DEOC and CO roles and responsibilities Improved system for media inquires and data practices requests Confusion regarding what investigation results are public information Use caution posting detailed contact info Mn/DOT employees can work out of the box, be flexible, work in strange locations and do what needs to get done!

55. Looking Ahead Litigation is pending Competing companies filing complaints against Mn/DOT bidding process Rebuild will keep the agency in response status for up to two years

57. I-35W Bridge UniversityofMinnesota DowntownMinneapolis http://maps.google.com/