All Hazards risk assessment of critical transportation infrastructure in the state of tennessee

1. All Hazards risk assessment of critical transportation infrastructure in the state of tennessee Survey Results Report 3/18/14 A. Brent Rollins, UTC

2. What is All Hazards Risk Assessment? • Risk = Threat x Vulnerability x Consequence

3. Method • 85 Assets examined based on highest traffic counts in the State, proximity to important sites, perceived lack of alternate routes, or other criteria. • From that list, 28 were selected to present as choices to survey recipients. • Survey was constructed using Qualtrics, a web-based survey company under contract with the University of Tennessee system.

4. Method – Lessons Learned • Introductory email to recipients did not adequately describe the project to offset suspicion from some agencies and individuals. • A corrective email was sent the same day, further establishing the credentials of the researcher and the project.

5. Survey Recipients • 162 State & County Employees Surveyed • 47 TDOT Employees • 94 County EMA Directors • 21 “Other” State and Municipal Employees • TN Dept. of Safety and Homeland Security • City of Knoxville • City of Nashville • Town of Woodbury • TN Dept. of General Services • TEMA

6. Response Rate • TDOT: 34.0% • County EMA Directors: 17.0% • Other: 14.3% Traditionally, web-based surveys get about an 11% response rate, so this one did well. There were eleven (11) responses that were discarded because no data was entered into the answer slots on any questions.

7. Method • Survey recipients were asked to assign assets a value between 1 and 10, with 10 being most critical to continued operation of the State. • The average values presented represent the mean of responses received. If a response left an asset value blank it was not computed in the average. • Responses received with no information entered for any assets were rejected.

8. Results – Asset averages TDOT EMA & Other • Desoto Mississippi River Bridge (8.79) • Memphis Airport (8.71) • Nashville Airport (8.32) • I-24 Bridge over Cumberland River (7.79) • I-440/I-240 Interchange (7.25) • I-440/I-65 Interchange (7.10) • Port of Memphis (7.00) • Olgiati Bridge (6.94) • I-65 Bridge over Cumberland River (6.78) • I-75/I-40 Bridge over Papermill (6.73) • Port of Memphis (7.44) • Desoto Mississippi River Bridge (7.41) • Memphis Airport (7.22) • I-440/I-65 Interchange (7.00) • Nashville Airport (6.78) • I-24 Bridge over Cumberland River (6.50) • Campbell County Slope Failure (6.25) • I-65 Bridge over Cumberland River (6.12) • I-440/I-240 Interchange (6.00) • I-440/I-24 Interchange (6.00)

9. Analysis • On average, TDOT employees rated assets 0.50 points higher than other respondents. • Generally good agreement on the top ten between TDOT employees and other respondents.

10. Desoto Mississippi River Bridge (8.01) Memphis Airport (7.88) Nashville Airport (7.48) Port of Memphis (7.26) I-24 Bridge over Cumberland River (7.08) I-440/I-65 Interchange (7.05) I-440/I-240 Interchange (6.52) I-65 Bridge over Cumberland River (6.42) Olgiati Bridge (6.18) I-24/I-65 Bridge over W. Trinity (6.17) I-440/I-24 Interchange (6.10) I-75/I-40 Bridge over Papermill (5.99)

11. Results – Total • Desoto Mississippi River Bridge (8.01) • Memphis Airport (7.88) • Nashville Airport (7.48) • Port of Memphis (7.26) • I-24 Bridge over Cumberland River (7.08) • I-440/I-65 Interchange (7.05) • I-440/I-240 Interchange (6.52) • I-65 Bridge over Cumberland River (6.42) • Olgiati Bridge (6.18) • I-24/I-65 Bridge over W. Trinity (6.17)

12. Results – Total • I-440/I-24 Interchange (6.10) • I-75/I-40 Bridge over Papermill (5.99) • Campbell County Slope Failure (5.88) • I-40 Slide Area in Roane County (5.81) • I-40 Bridges over Hwy 41 and 2nd Ave (5.78) • Chattanooga Airport (5.74) • Harding Place Bridge over I-65 (5.73) • Oak Ridge Hwy Bridge over Clinch River (5.66) • I-75/I-40 over Hollywood (5.65) • Knoxville Airport (5.61)

13. Results – Total • Briley Parkway bridge over I-24 (5.60) • I-24/I-40 over Fairfield (5.47) • Thompson Lane over I-65 (5.44) • Hwy 11/64 Rock Slide (5.43) • Fesslers over I-40/I-24 (5.40) • TDOT HQ (5.39) • Henley St. Bridge (5.38) • Pelissippi over I-75/I-40 (5.17)

14. Results – Total (write-ins) • Rail switch south end of Radnor Yard Nashville • Barkley and Cheatham Locks on Tennessee River • I-40 Bridge over Stones River • U.S. 70 Bridge over Stones River • Flood-prone area of I-65 in Maury County • Hwy 33 Bridge over Norris Lake • 25E Bridge between Claiborne and Grainger Counties • Powell River bridge between Tazewell and Harrogate • Tunnel on 25E to VA and KY • I-40 Bridge Benton County (x2)

15. Results – Total (write-ins) • I-40 and 45 Bypass in Jackson • State Capitol • Various COE Dams • I-40 Bridge Douglas Lake Jefferson County • I-40 Bridge Crossing I-81 Jefferson County • Hwy 92 Bridge Crossing Holston River at Cherokee Dam • I-75/I-24 Interchange • I-24 over Nickajack Lake in Marion County • I-75 over Hiwassee • I-75 over Tennessee in Loudon County

16. Results – Total (write-ins) • Railroad crossings over rivers • I-40, Hwy 76, Hwy 412 Bridges over Tennessee River • Any that restrict military movement or civilian evacuations during disaster

17. Conclusions • We have our top ten, with generally good agreement between TDOT and others in the State. • The two airports lie outside TDOT jurisdiction other than grant management. Airport All-Hazard Risk Assessment presents many logistical challenges. UTC recommends postponing airport assessments for a future project, and substituting #11 and #12 in place of the airports.

18. Underside access main issue

21. Questions/ Discussion Do any of the write in responses warrant further investigation? Do any of the top ten (not including the airports) lie outside TDOT jurisdiction?