NTSB
Project Information (as of Jan 14, 2009 14:15)
Project ID(mkey) Investigation Type Mode
66352 Accident  Highway
NTSB Accident ID Occurrence Date Location
HWY07MH024 Aug 01, 2007 Minneapolis, MN, United States
Docket Information
Docket ID Creation Date Last Modified Public Release Date & Time
44005 Aug 17, 2007 Nov 13, 2008  11/13/2008 07:57

List of Contents
File ID Filing Date Document Title Pages  Photo 
407080 Dec 05, 2008Log of availble digital files via DVD 3  
405678 Nov 17, 2008Finite Element Analysis simulation of failure intitation mechanism from Board presentation --  
407688 Dec 15, 2008Video File - Initial Failure Animation --  
407687 Dec 15, 2008Video File - Structure and Components animation --  
407686 Dec 15, 2008Video File Animation descriptions and disclaimer 2  
405006 Nov 05, 2008Witness and Victim Interviews 413  
375411 Aug 17, 2007Photo 1. Overhead view of bridge in water looking north  1 
387871 Mar 13, 2008State-by-state bridge counts 6  
383930 Jan 14, 2008FHWA Interim Report - Adequacy of the U10 & L11 Gusset Plate Designs for the Minnesota Bridge No. 9340 (I-35W over the Mississippi River) 20  
404084 Oct 24, 2008FHWA Final Report on Gusset Plate Design Adequacy 20  
383947 Jan 14, 2008Bridge Diagram showing locatons of gussets U10 & L11 1  
387406 Mar 07, 2008Photos of I-35W bridge 26  
379683 Oct 29, 2007Truss Diagram Nomenclature and Salvage Log 37  
386200 Feb 21, 2008Materials Lab - Factual Report 07-119 Gusset Plate 4  
391041 Apr 18, 2008Materials Lab - Factual Report 08-004 L10-L11W 12  
386487 Feb 26, 2008Materials laboratory factual report 08-006 Hardness measurements 3  
404965 Nov 05, 2008Materials Laboratory Factual Report 08-096, Laser scans and corrosion measurements of L11 gusset plates 63  
387408 Mar 07, 2008Structural Investigation Group Chairman Factual Report 08-015 (Materials Lab) 135  
387407 Mar 07, 2008Modeling Group Contractor Interim Report 40  
405446 Nov 12, 2008Modeling Group Chairman Final Report 08-119 271  
385259 Feb 07, 2008Modeling Group Study 07-115, Loads on the bridge at the time of the accident 26  
404087 Oct 24, 2008FHWA I35W TFHRC Model Report Final 138  
404944 Nov 05, 2008Modeling Group Study Report 07-115B, Erratum - correction to Table 4 2  
403416 Oct 17, 2008BSDI I-35W Review of Original Design 69  
404089 Oct 24, 2008FHWA Materials Property Testing Report 61  
400050 Aug 25, 2008Materials Laboratory Study Report 08-086, Truss Loads during Construction and Change in Angle 23  
405240 Nov 07, 2008Materials Laboratory Study Report 08-103, Chord splice calculations for preliminary and final designs of I-35W bridge 52  
405373 Nov 11, 2008BridgeU10W_bow0_Riks_U3_Animation --  
405374 Nov 11, 2008BridgeU10W_meshP2_Riks_MisesStress_Animation --  
405375 Nov 11, 2008BridgeU10W_meshP5_Riks_MisesStress_Animation --  
405242 Nov 07, 2008Materials Laboratory Study Report 08-117, Review of Sverdrup manual and Orinoco bridge computations 16  
405239 Nov 07, 2008Materials Laboratory Study Report 08-118, Calculation of differential temperature for I-35W bridge 37  
399813 Aug 21, 2008Materials Lab - Factual Report 08-073 Erection Sequence 14  
398902 Aug 07, 2008Materials Laboratory Study 08-062, Comparison of Gusset Plate Design Characteristics 16  
391631 Apr 29, 2008Materials Lab - Factual Report 08-031 nodes L11 9  
392371 May 07, 2008Materials Lab - Factual Report 08-053 Gusset plate hardness 3  
394629 Jun 05, 2008Digital Video Recording Images 1  
401355 Sep 12, 2008Specialist's Study Report Gusset Plate Photograph Measurements 38  
394730 Jun 06, 2008Pre-Collapse Images - Nodes U10 and L11 21  
394892 Jun 10, 2008Video Study 54  
403418 Oct 17, 2008Materials Lab - Collapse Sequencing Study Photos 08-032A 29  
403417 Oct 17, 2008Materials Lab - Collapse Sequencing Study 08-032 28  
401312 Sep 11, 2008Materials Lab - Study 08-074 Design 13  
405224 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference A 21  
405237 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference B 32  
405225 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference C 26  
405226 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference D 4  
405227 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference E 3  
405228 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference F 3  
405229 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference G 10  
405230 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference H 3  
405231 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference I 1  
405232 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference J 2  
405233 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference K 2  
405234 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference L 5  
405235 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference M 2  
405467 Nov 12, 2008Materials Lab - Factual Report 08-074 Referencec N and O 1  
405236 Nov 07, 2008Materials Lab - Factual Report 08-074 Reference P 22  
406197 Nov 21, 2008Design drawings and shop drawings used to create U10 and L11 finite element models 30  
396800 Jul 09, 2008Witness Group Chairman Factual Report 7  
396802 Jul 09, 2008Witness Group Chairman Factual Report - Attachment A: Spreadsheet of Contacts 11  
398231 Jul 29, 2008Witness Group Chairman Factual Report - Attachment B: Summaries of Witness Interviews 151  
396806 Jul 09, 2008Witness Group Chairman Factual Report - Attachment C: Summaries of Other Information Interviews 46  
397147 Jul 15, 2008Survival Factors - Group Chairman Factual Report 12  
400746 Sep 04, 2008Survival Factors - Attachment 1, Vehicle Information 5  
397150 Jul 15, 2008Survival Factors - Attachment 2, Interviews 28  
397155 Jul 15, 2008Survival Factors Attachment-A, HCSO Dispatch Logs 14  
397156 Jul 15, 2008Survival Factors Attachment-B, HCSO Dive Operations Report 6  
397157 Jul 15, 2008Survival Factors Attachment-C, Minneapolis FD Dispatch Logs 33  
397250 Jul 16, 2008Survival Factors Attachment-D, Minneapolis FD Field Report 28  
397251 Jul 16, 2008Survival Factors Attachment-E, Minneapolis PD Dispatch Logs 60  
397252 Jul 16, 2008Survival Factors Attachment-F, USACE Mississippi River Navigation Bulletins 4  
397253 Jul 16, 2008Survival Factors Attachment-G, Hennepin County EOC Debriefing 6  
404391 Oct 28, 2008Factual Report of Sverdrup & Parcell Engineering Employees Interviewed 12  
405128 Nov 06, 2008Highway Construction Factors Factual Report 45  
398327 Jul 30, 2008Highway Construction Factors Group Attachment 1 - Interview Transcript of MnDOT Bridge Inspector Harvey Unruh 18  
398329 Jul 30, 2008Highway Construction Factors Group Attachment 2 - Weight Tickets for Material Loads on the Bridge at the Time of the Collapse 9  
398330 Jul 30, 2008Highway Construction Factors Group Attachment 3 - Diagrams for Overlays 9  
398331 Jul 30, 2008Highway Construction Factors Group Attachment 4 - Excerpts from Construction Project Design Plans 17  
398340 Jul 30, 2008Highway Construction Factors Group Attachment 5 - Excerpts from the Construction Contract (S-29) 2  
398341 Jul 30, 2008Highway Construction Factors Group Attachment 6 - Pre-Construction Conference Minutes 7  
398471 Jul 31, 2008Highway Construction Factors Group Attachment 7A - MnDOT Weekly Construction Diaries 31  
398472 Jul 31, 2008Highway Construction Factors Group Attachment 7B - MnDOT Weekly Construction Diaries 29  
398475 Jul 31, 2008Highway Construction Factors Group Attachment 7C - MnDOT Weekly Construction Diaries 38  
398478 Jul 31, 2008Highway Construction Factors Group Attacment 7D - MnDOT Weekly Construction Diaries 25  
398479 Jul 31, 2008Highway Construction Factors Group Attachment 7E - MnDOT Weekly Construction Diaries 24  
398343 Jul 30, 2008Highway Construction Factors Group Attachment 8 - Overweight Permits Issued 112  
398344 Jul 30, 2008Highway Construction Factor Group Attachment 8B - Overweight Permits Issued 33  
398345 Jul 30, 2008Highway Construction Factors Group Attachment 8C - Overweight Permits Issued 17  
398347 Jul 30, 2008Highway Construction Factors Group Attachment 8D - Overweight Permits Issued 22  
398348 Jul 30, 2008Highway Construction Factors Group Attachment 8E - Overweight Permits Issued 18  
398350 Jul 30, 2008Highway Construction Factors Group Attachment 9 - Critical Path Method (CPM) Schedule 10  
398353 Jul 30, 2008Highway Construction Factors Group Attachment 10 - Minutes of Weekly Meetings by MnDOT Project Engineer 11  
405357 Nov 11, 2008Highway Construction Factors Group Attachment 11, Ramsey County Sheriff's Office Interview Summaries of PCI Work Crew 46  
405082 Nov 06, 2008Highway Construction Factors Group Attacment 12 - Policies Restriction Construction Loads on Bridge Decks1. MNDOT Construction Specification 1513 (old Version in effect at time of collapse2. FHWA Technical Advisory 5140.283. AASHTO Policy 8.15.3 6  
405086 Nov 06, 2008Highway Construction Factors Group Attachment 13 - List of Fire Department Apparatus Using Bridge 9340 3  
405087 Nov 06, 2008Highway Construction Factors Group Attachment 14 - 1977 Overlay Inspection Report From Bridge 9340 13  
405089 Nov 06, 2008Highway Construction Factors Group Attachment 15 - AASHTO POLL on Brige Design Peer Reviews and Construction Loading Policy Restrictions 2  
405097 Nov 06, 2008Highway Construction Factors Group Attachment 16 - MNDOT Revisions to Construction Specification 1513, "Restrictions on Movement and Storage of Heavy Loads and Equipment"Dated 4/08/2008 and 9/18/2008 3  
405106 Nov 06, 2008Highway Construction Factors Group Attachment 17 - State Bridge Loading Restrictions During Construction for Alabama, California, Massachusetts, and Minnesota 43  
405107 Nov 06, 2008Highway Construction Factors GroupAttachment 18 Part ANew York Specifications for Restricting Bridge Loading During Construction 61  
405111 Nov 06, 2008Highway Construction Factors Group attachment 18 Part BNew York Specifications Continued 70  
405127 Nov 06, 2008Highway Construction Factors Group Attachment 19 State Policies Restriction Construction loading on Bridges in Ohio, Oregon, Texas, Washington, West Virginia, and Pennsylvania 82  
405135 Nov 06, 2008Photograph of Aggregates on Bridge Deck  1 
404013 Oct 23, 2008Bridge Design Group - Bridge Design Group Chairman Factual Report 89  
401899 Sep 20, 2008Bridge Design Group - Addendum to Bridge Design Group Chairman Factual Report 72  
404908 Nov 04, 2008Bridge Design Group - Attachment 1, National Bridge Inventory (NBI) forms for the I-35W Bridge (Bridge #9340) from 1983 through 2007 76  
401903 Sep 20, 2008Bridge Design Group - Attachment 2, Letter to the National Transportation Safety Board from the Minnesota Department of Transportation dated April 22, 2008 3  
401905 Sep 20, 2008Bridge Design Group - Attachment 3, Minnesota Department of Transportation Bridge Inspection Manual dated May 2007 78  
401907 Sep 20, 2008Bridge Design Group - Attachment 4, Mn/DOT Bridge Inspection Reports dated August 5, 1990 and October 18, 1993 10  
401909 Sep 20, 2008Bridge Design Group - Attachment 5, Mn/DOT Fracture Critical Bridge Inspection In-Depth Report dated June 2006 51  
401911 Sep 20, 2008Bridge Design Group - Attachment 6, Letter to the National Transportation Safety Board from the Minnesota Department of Transportation dated December 19, 2007 16  
401912 Sep 20, 2008Bridge Design Group - Attachment 7, FHWA's Apportionment Process for Highway Bridge Program (HBP) Funds 9  
401914 Sep 20, 2008Bridge Design Group - Attachment 8, Mn/DOT Fracture Critical Bridge Inspection Annual Report dated June 2004 47  
401916 Sep 20, 2008Bridge Design Group - Attachment 9, Letter to the National Transportation Safety Board from the Minnesota Department of Transportation dated September 21, 2007 40  
401917 Sep 20, 2008Bridge Design Group - Attachment 10, Mn/DOT Bridge Inspection Report dated June 15, 2006 5  
401919 Sep 20, 2008Bridge Design Group - Attachment 11, Mn/DOT Guidelines for In-Depth Inspection of Failure Critical and Other Non-Redundant Bridges and for Underwater Inspections dated July 19, 2007 7  
401921 Sep 20, 2008Bridge Design Group - Attachment 12, Mn/DOT Technical Memorandum regarding "Critical Deficiencies" found during bridge inspections dated July 20, 2005 6  
401922 Sep 20, 2008Bridge Design Group - Attachment 13, URS Corporation Fatigue Evaluation and Redundancy Analysis Draft Report for Bridge #9340, Executive Summary, dated January 2007 5  
402209 Sep 24, 2008Bridge Design Group – Attachment 14, URS Corporation Fatigue Evaluation Redundancy Analysis Draft Report for Bridge #9340 dated July 2006 300  
401923 Sep 20, 2008Bridge Design Group - Attachment 15, URS Corporation Fatigue Evaluation Bridge 9340 35W over Mississippi River Second Inspection Report dated November 17, 2003 30  
402211 Sep 24, 2008Bridge Design Group – Attachment 16, URS Corporation Fatigue Evaluation Bridge 9340 35W over Mississippi River Initial Inspection Report dated June 9, 2003 100  
401924 Sep 20, 2008Bridge Design Group - Attachment 17, University of Minnesota Fatigue Evaluation of the Deck Truss of Bridge 9340 Final Report dated March 2001 90  
401927 Sep 21, 2008Bridge Design Group - Attachment 18, Mn/DOT Memorandums documenting cracks in the north approach span girder near Pier 9 from October 1998 through November 2000 21  
401929 Sep 21, 2008Bridge Design Group - Attachment 19, Ayres Associates Underwater Bridge Inspection Report for Bridge #9340 dated December 8, 2004 10  
401931 Sep 21, 2008Bridge Design Group - Attachment 20, Email to the National Transportation Safety Board from the Minnesota Department of Transportation dated January 10, 2008 3  
401932 Sep 21, 2008Bridge Design Group - Attachment 21, Mn/DOT LRFD Bridge Design Manual, Chapter 15 Bridge Rating, dated June 2007 Draft 15  
401934 Sep 21, 2008Bridge Design Group - Attachment 22, Mn/DOT Bridge Rating and Load Posting Report dated December 14, 1995 7  
401936 Sep 21, 2008Bridge Design Group - Attachment 23, Letter to the National Transportation Safety Board from the Minnesota Department of Transportation dated January 8, 2008 43  
401937 Sep 21, 2008Bridge Design Group - Attachment 24, Mn/DOT BARS load rating computer printout dated December 11, 1995 63  
401938 Sep 21, 2008Bridge Design Group - Attachment 25, Mn/DOT BARS load rating computer printout dated August 18, 1997 95  
401940 Sep 21, 2008Bridge Design Group - Attachment 26, Email to the National Transportation Safety Board from the Minnesota Department of Transportation dated November 2, 2007 3  
401942 Sep 21, 2008Bridge Design Group - Attachment 27, Mn/DOT Bridge Rating and Load Posting Report dated September 17, 1979 2  
401944 Sep 21, 2008Bridge Design Group - Attachment 28, Email to the National Transportation Safety Board from the Minnesota Department of Transportation dated October 10, 2007 2  
401945 Sep 21, 2008Bridge Design Group - Attachment 29, FHWA Turner-Fairbank Highway Research Center Report Assessment of the Load Rating Records for Minnesota Bridge No. 9340 (I-35W over the Mississippi River) dated June 30, 2008 10  
401947 Sep 21, 2008Bridge Design Group - Attachment 30, Email to the Minnesota Department of Transportation from the National Transportation Safety Board dated October 15, 2007 2  
401948 Sep 21, 2008Bridge Design Group - Attachment 31, Mn/DOT transmittal of report to NTSB entitled Load Rating of Bridge 9340 with Construction Loads 4  
401950 Sep 21, 2008Bridge Design Group - Attachment 32, Copy of minutes of meetings, emails, and handwritten notes from July 24, 2006 through May 2007 as it relates to proposal for steel plating of all 52 fracture critical truss members 68  
401952 Sep 21, 2008Bridge Design Group - Attachment 33, Field notes taken by Mn/DOT Inspection Team dated May 2007 16  
401953 Sep 21, 2008Bridge Design Group - Attachment 34, Mn/DOT correspondence and photographs of washout hole between Pier 4 and 5 7  
401954 Sep 21, 2008Bridge Design Group - Attachment 35, Mn/DOT concrete core testing of bridge deck dated August 23, 2007 3  
401956 Sep 21, 2008Bridge Design Group - Attachment 36, Minnesota Classification Questionnaire dated February 24, 1960 6  
401957 Sep 21, 2008Bridge Design Group - Attachment 37, Minnesota Highway Department Bridge Design Manual dated April 12, 1972 3  
401959 Sep 21, 2008Bridge Design Group - Attachment 38, Consultant agreement between Mn/DOT and Sverdrup and Parcel and Associates, Inc. dated November 5, 1962 22  
401960 Sep 21, 2008Bridge Design Group - Attachment 39, Mn/DOT consultant services work type definition dated March 26, 2003 8  
401962 Sep 21, 2008Bridge Design Group - Attachment 40, Letter to the National Transportation Safety Board from the Minnesota Department of Transportation dated March 6, 2008 3  
401964 Sep 21, 2008Bridge Design Group - Attachment 41, Letter to the National Transportation Safety Board from the Minnesota Department of Transportation dated March 24, 2008 3  
401986 Sep 22, 2008Bridge Design Group - Attachment 42, Mn/DOT Load and Resistance Factor Design (LRFD) Bridge Design Manual 6  
401993 Sep 22, 2008Bridge Design Group - Attachment 43, Email to the National Transportation Safety Board from the Federal Highway Administration - Minnesota Division Office dated March 7, 2008 3  
401994 Sep 22, 2008Bridge Design Group - Attachment 44, FHWA Memorandum to Division Administrators dated February 22, 2007 5  
401995 Sep 22, 2008Bridge Design Group - Attachment 45, FHWA Bridge Program Manual dated August 2004 19  
402042 Sep 22, 2008Bridge Design Group - Attachment 46, Sverdrup & Parcel and Associates, Inc. document entitled Procedure for Checking Design Notes and Coordinating Same with Detail Checker dated September 1953 3  
402044 Sep 22, 2008Bridge Design Group - Attachment 47, Sverdrup & Parcel and Associates, Inc. document entitled Quality Control Coordination and Checking Procedures dated April 1975 20  
402045 Sep 22, 2008Bridge Design Group - Attachment 48, Answers to standard set of questions by the California DOT (Caltrans) 15  
402183 Sep 23, 2008Bridge Design Group - Attachment 49, Answers to standard set of questions by the Florida DOT 4  
402184 Sep 23, 2008Bridge Design Group - Attachment 50, Answers to standard set of questions by the Iowa DOT 22  
404724 Nov 01, 2008Bridge Design Group - Attachment 51, Answers to standard set of questions by the Kansas DOT 22  
402186 Sep 23, 2008Bridge Design Group - Attachment 52, Answers to standard set of questions by the Maryland State Highway Administration 4  
402188 Sep 23, 2008Bridge Design Group - Attachment 53, Answers to standard set of questions by the Minnesota DOT 65  
402189 Sep 23, 2008Bridge Design Group - Attachment 54, Answers to standard set of questions by the Nebraska Department of Roads 3  
402190 Sep 23, 2008Bridge Design Group - Attachment 55, Answers to standard set of questions by the New York State DOT 33  
402194 Sep 24, 2008Bridge Design Group - Attachment 56, Answers to standard set of questions by the Ohio DOT 3  
402195 Sep 24, 2008Bridge Design Group - Attachment 57, Answers to standard set of questions by the Oregon DOT 3  
402197 Sep 24, 2008Bridge Design Group - Attachment 58, Answers to standard set of questions by the Pennsylvania DOT 41  
402198 Sep 24, 2008Bridge Design Group - Attachment 59, Answers to standard set of questions by the Tennessee DOT 3  
402199 Sep 24, 2008Bridge Design Group - Attachment 60, Answers to standard set of questions by the Texas DOT 35  
402200 Sep 24, 2008Bridge Design Group - Attachment 61, Answers to standard set of questions by the Virginia DOT 65  
402202 Sep 24, 2008Bridge Design Group - Attachment 62, Answers to standard set of questions by the Washington State DOT 3  
405475 Nov 12, 2008NTSB Interviews of MnDOT Inspectors 63  
404915 Nov 04, 2008Factual Summary of State DOT Responses to Bridge Design Errors 9  
404911 Nov 04, 2008Factual Summary of Findings from Other Bridges in the Minnesota DOT Inventory 6  
404914 Nov 04, 2008Factual Report of Corroded Gusset Plates on Ohio Bridges 8  
404912 Nov 04, 2008Federal Highway Administration Bridge Inspection Training Specific to Gusset Plates 10  
405222 Nov 07, 2008Factual Summary of Employee Interviews 7  
404913 Nov 04, 2008Factual Summary of Interviews with Former Sverdrup & Parcel Employees: T. Dillon and W. Gaddis 3  
404827 Nov 03, 2008Gray, Plant, Mooty - Investigative Report to Joint Committee to Investigate the I-35W Bridge Collapse, Dated May 2008 126  
404995 Nov 05, 2008Wiss, Janney, Elstner Associates, Inc. - I-35W Bridge over the Mississippi River: Collapse Investigation, Final Report, November 2008 176  
404829 Nov 03, 2008Submission of Progressive Contractors, Inc. to the National Transportation Safety Board, October 2008 16  
404830 Nov 03, 2008Mn/DOT response to PCI Submission, Dated October 20, 2008 1  
405358 Nov 11, 2008Submission of Jacobs Engineering Group, Inc. to the National Transportation Safety Board, November 2008 7  
405476 Nov 12, 2008Mn/DOT response to Jacobs Engineering Submission, Dated November 12, 2008 1  
405150 Nov 06, 2008Sandia National Laboratories Peer Review of the National Transportation Safety Board Structural Analysis of the I-35W Bridge Collapse, October 2008 14  
405359 Nov 11, 2008Presentation 01 - Photo of post-collapse dive operations (source FHWA)  1 
405360 Nov 11, 2008Presentation 02 - Photo of debris removal (source FHWA)  1 
405361 Nov 11, 2008Presentation 03 - photo of debris removal (source FHWA)  1 
405362 Nov 11, 2008Presentation 04 - Photo of debris removal (source FHWA)  1 
405363 Nov 11, 2008Presentation 05 - Photo of post-collapse vehicles (source MPD)  1 
405364 Nov 11, 2008Presentation 06 - Photo of post-collapse vehicles (source MPD)  1 
405365 Nov 11, 2008Presentation 07 - Photo of post-collapse vehicles (source MPD)  1 
405366 Nov 11, 2008Presentation 08 - Photo of post-collapse rescue efforts (source MPD)  1 
405367 Nov 11, 2008Presentation 09 - Photo of post-collapse rescue efforts (source MPD)  1 
405368 Nov 11, 2008Presentation 10 - Photo of post-collapse rescue efforts (source MPD)  1 
405369 Nov 11, 2008Presentation 11 - Photo of post-collapse rescue efforts (source MPD)  1