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  • Drains nearly 1/6th of the area of the United States.Covers 500,000 square miles: Rockies to Mississippi River.2,341 miles, the longest river in the United States.735 mile navigation channel from Sioux City to St. Louis. 300 feet wide and 9 feet deep.Six major flood control reservoirs constructed 1930’s-1960’s.Gavins Point Dam (South Dakota) the last downstream dam.
  • The2011 maximum release was 160,000 cfs from June 25 to July 31.The previous record from Gavins Point was 70,000 cfs in 1997.Release was above 70,000 cfs from May 30 – Sept 26.
  • Started with close to 24 mitigation sites but that narrowed down to 14 and then 12, based upon where the water ended up going due to levee breaks or lack thereof.I-29 segments closed for over 100 days.
  • Photo: W:\\Highway\\Maintenance\\Statewide Emergency Operations\\Western Iowa Flood\\Photos\\State Patrol Photos\\06-27-11 Geotagged\\6-27-11 SD to MO (04).jpg
  • This is a recent aerial photo of the abutment area after the armoring was completed. This photo was taken Aug 11th. Note that water is still moving quickly through the area. It is expected that this area will need further mitigation as flood waters recede in order to address scour issues.Next slide: TrapBags on I-29 near MP 107Photo: W:\\Highway\\Maintenance\\Statewide Emergency Operations\\Western Iowa Flood\\Photos\\State Patrol Photos\\08-11-11 Geotagged 2_Monona county\\110811_MoRiver_190.jpg
  • Right by the CB North garage (top left of the picture)DOT had two maint garages vacated from June-August.
  • This levee breech is the cause of many of the problems we’re having on the southern sections of I-29 and other routes (mainly IA-2). As you can see in the photo, the breech is nearly as wide as the main river channel.Next slide: water overtopping I-29 near PercivalPhoto: W:\\Highway\\Maintenance\\Statewide Emergency Operations\\Western Iowa Flood\\Photos\\State Patrol Photos\\08-11-11 Geotagged 6_Fremont county\\110811_MoRiver_711.jpg
  • Bridges over Drainage Ditch #6.Most of the water from the levee breach north of here flowed to the east of I-29 and then went into this drainage ditch and ran south and west to get back to the Missouri River.
  • Photo: W:\\Highway\\Maintenance\\Statewide Emergency Operations\\Western Iowa Flood\\Photos\\IA 2\\07-01-11\\CIMG1397.JPG
  • Photo: W:\\Highway\\Maintenance\\Statewide Emergency Operations\\Western Iowa Flood\\Photos\\State Patrol Photos\\07-02-11 Geotagged 3_IA2 to MO State Line\\110702_MOflooding_695.jpg
  • Google Earth is free application, the data overlays were custom made by DOT staff, USGS and USACE.Calls utilized Adobe Connect for the video connection and standard conference calling
  • 511 and the Flood website were two separate entities.
  • Local cross-state coordination with local officials (Iowa-Nebraska)
  • Photo: W:\\Highway\\Maintenance\\Statewide Emergency Operations\\Western Iowa Flood\\Photos\\06-25-11 Geotagged Land Based from Linda Torgeson\\30. TrapBags I-29 South.JPG
  • Photo: \\\\ntdfs\\(W)DataStor\\Highway\\Maintenance\\Statewide Emergency Operations\\Western Iowa Flood\\Mitigation Plans\\US-30\\IDOT-TrapBag-Install-OWH-01.jpg (credit to Omaha World Herald)
  • ICS structure set up but was not fully implemented.Conference calls are on an ad-hoc basis as of October 6.
  • This is the global detour map as it appears on the DOT’s flood website reference earlier in the presentation.This lasted for 113 days.
  • Many locals commute across the river for work, either from Iowa to Nebraska City, Plattsmouth, Omaha or Blair or from Nebraska to Glenwood, Council Bluffs, Onawa or Sioux City.Crossing the river is a way of life for them.
  • I-90 and I-70 saw more traffic.

Transcript

  • 1. 2012 Moving Iowa Forward Conference Tuesday, April 24, 2012 Sheraton, West Des MoinesMitchell Dillavou, Engineering Bureau Director Iowa Department of Transportation
  • 2. Iowa Departmentof TransportationThe 2011 Missouri River Flood: Coordinating Response and Recovery 2
  • 3. Iowa Department 2011 Missouri River Floodof Transportation The Missouri River Basin North Dakota Montana Wyoming South Dakota Iowa Nebraska Colorado Missouri 3
  • 4. Iowa Department 2011 Missouri River Flood of Transportation Overview of Flood Event• Snowpack in Northern Rockies was 212% above normal.• One year’s worth of rain fell in the Upper Missouri Basin the last two weeks of May.• Water released from Gavins Point Dam June 25 exceeded twice the previous record and did not decrease until July 31.• The Missouri River in Sioux City was above flood stage from June 5 to August 26 (82 days).• Old oxbows / meanders filled with floodwater and groundwater.• Longest duration flood event in U.S. history. 4
  • 5. 180,000 2011 Missouri River Flood Timeline - Iowa Transportation Impacts USACE: "Peak flow of 160kcfsreduced to 150kcfs USACE: "Flow through August" on August 1st" USACE: "Peak flow of 150kcfs by USACE annouces plan to step- 160,000 mid-June" down to 90kcfs by Aug 27th USACE: "Peak flow of 130-Daily Average Release from Gavins Point Dam - Cubic Feet per Second 150kcfs by late I-680 north interchange I-29 / June" Waters begin to recede, exposing closes USACE announces peak flow of/ I-680 north interchange I-29 140,000 extensive debris and damage 110kcfs by late June mitigation project I-29 / I-680 north Letting for I-680 re-construction interchange re-opens 120,000 TrapBag installation on US-30 Letting for IA-175 Decatur bridge west of Missouri Valley project I-29 and IA-333 closed in I-680 in Council Bluffs area Hamburg area (MP 1-10) (MP 1-3) re-opens 100,000 I-29 / Hamilton Blvd I-29 closed exit closes (exit 24) exit Bartlett I-29 / Hamilton Blvd exit re- (exit 149) mitigation on I-29 near TrapBag opens (exit 149) Blencoe (MP 107-109) I-29 in Council Bluffs area I-680 closed in Council Bluffs area IA-333 near Hamburg re- 80,000 (MP 55-71) re-opens (MP 1-3)IA-175 Decatur bridge opens embankment mitigation project Gavins Point exceeds all-time record flow of 70kcfs 60,000 IA-175 shoulder protection mitigation project using 12" I-29 project ACC overlay (MP 103.5) I-29 near Hamburg (MP 0- I-29 Closed in Council Bluffs area IA-175 Decatur bridge re- 32) re-opens (MP 55-71) opens IA-175 Decatur bridge closes 40,000 IA-2 lane closure IA-2 closed west of I-29 20,000 - 27-May 3-Jun 1-Jul 8-Jul 5-Aug 12-Aug 19-Aug 26-Aug 10-Jun 17-Jun 24-Jun 15-Jul 22-Jul 29-Jul 2011 Release Rate Typical Year Release Rate 5
  • 6. 180,000 2011 Missouri River Flood Timeline - Iowa Transportation Impacts USACE: "Peak flow of 160kcfsreduced to 150kcfs USACE: "Flow USACE: "Peak flow of 150kcfs byAugust" on August 1st" through USACE annouces plan to step- 160,000 mid-June" down to 90kcfs by Aug 27thDaily Average Release from Gavins Point Dam - Cubic Feet per Second USACE: "Peak flow of 130- 150kcfs by late I-680 north interchange I-29 / June" Waters begin to recede, exposing closes USACE announces peak flow of/ I-680 north interchange I-29 140,000 extensive debris and damage 110kcfs by late June mitigation project I-29 / I-680 north Letting for I-680 re-construction interchange re-opens 120,000 TrapBag installation on US-30 Letting for IA-175 Decatur bridge west of Missouri Valley project I-29 and IA-333 closed in I-680 in Council Bluffs area Hamburg area (MP 1-10) (MP 1-3) re-opens 100,000 I-29 / Hamilton Blvd I-29 closed exit closes (exit 24) exit Bartlett I-29 / Hamilton Blvd exit re- (exit 149) mitigation on I-29 near TrapBag opens (exit 149) Blencoe (MP 107-109) I-29 in Council Bluffs area I-680 closed in Council Bluffs area IA-333 near Hamburg re- 80,000 (MP 55-71) re-opens (MP 1-3)IA-175 Decatur bridge opens embankment mitigation project Gavins Point exceeds all-time record flow of 70kcfs 60,000 IA-175 shoulder protection mitigation project using 12" I-29 project ACC overlay (MP 103.5) I-29 near Hamburg (MP 0- I-29 Closed in Council Bluffs area IA-175 Decatur bridge re- 32) re-opens (MP 55-71) opens IA-175 Decatur bridge closes 40,000 IA-2 lane closure IA-2 closed west of I-29 20,000 - 7-Nov 14-Nov 15-Aug 22-Aug 29-Aug 5-Sep 12-Sep 19-Sep 26-Sep 3-Oct 10-Oct 17-Oct 24-Oct 31-Oct 2011 Release Rate Typical Year Release Rate 6
  • 7. Iowa Department 2011 Missouri River Flood of TransportationImpact upon Iowa’s Primary Roads • I-29, I-680 and other primary routes were impacted. – Approximately 60 miles of roads were closed – I-29 closed in two segments covering almost 50 miles • 12 mitigation sites – 7 closures – 5 open sites had mitigation measures in place – 3 of 12 Western Iowa river crossings were closed from June to November • Emergency projects to keep sections of I-29 and US 30 open. 7
  • 8. I-29 Hamilton Blvd Interchange - Sioux City Southbound exit / entrance ramps closed 8
  • 9. Iowa Highway 175 Bridge: 1950’s 9
  • 10. Iowa Highway 175 Bridge: 2009 10
  • 11. Iowa Highway 175 Bridge: Summer 2011 11
  • 12. Iowa Highway 175 Bridge
  • 13. I-29 / I-680 north of Omaha-Council Bluffs I-29 / I-680 Interchange looking west to Omaha 13
  • 14. I-29 / I-680 north of Omaha-Council Bluffs I-29 / I-680 Interchange looking southwest to Omaha 14
  • 15. I-29 north of Omaha-Council Bluffs I-29 Looking Southwest toward Council Bluffs 15
  • 16. Levee Breech in Fremont County
  • 17. I-29 in Southwest Iowa I-29 looking north at MP 15 17
  • 18. I-29 in Southwest IowaWater and debris on roadway at MP 1 18
  • 19. I-29 in Southwest IowaDrainage ditch under mainline at MP 1 - Two months after flooding began 19
  • 20. Rail damage in Fremont County Rail line looking north from Iowa 2 east of I-29 20
  • 21. I-29 at HamburgLooking north from the Missouri border 21
  • 22. Iowa Department 2011 Missouri River Flood of TransportationCommunication and Coordination • Initial coordination between 6 states (South Dakota, Minnesota, Nebraska, Iowa, Missouri and Kansas) • Iowa DOT hosted a daily partner conference call / webinar starting in June, became weekly in August and lasted into October. • Included neighboring states, Iowa state agencies, Federal officials and facilitated key decision-making discussions. • Heavy use of GIS provided partners a common operating picture. Used Google Earth with custom layers (inundation levels, LIDAR, historical imagery, etc…) 22
  • 23. Iowa Department 2011 Missouri River Flood of TransportationCommunication and Coordination • Iowa DOT opened a flood call center for the public – Open from June 9 - July 12. – Anywhere from 2 - 8 operators at any one time, close to 50,000 calls were received from the public. • A Missouri River Flood Website was hosted by Iowa DOT. – Contains press releases, detour maps and other information resources. • The Iowa 511 site had approximately 650,000 visits during peak flooding in June and July. 23
  • 24. Iowa Department 2011 Missouri River Flood of TransportationIowa DOT Response: District Level • Flooding in 2 of 6 DOT Districts • Resources from other Districts moved to Western Iowa • State Disaster Proclamation issued • State resources used to support local flood fight • Missions assigned from State Emergency Operations Center • High degree of coordination between DOT Districts and HQ 24
  • 25. Iowa Department 2011 Missouri River Flood of TransportationIowa DOT Response: District Level • Mitigation Measures employed: – Installation of TrapBags on shoulders and medians – Raised roadway elevations with HMA overlay – Used pumps and pipe jacking to keep water off roads • Coordination with local officials – Setting up local detour routes – DOT access to local resources, e.g. quarries – Providing information to affected residents 25
  • 26. I-29 MP 107 in Monona County TrapBag installation on southbound I-29 bridge 26
  • 27. US 30 West of Missouri ValleyInstallation of TrapBags on south side of US 30 27
  • 28. Iowa Department 2011 Missouri River Flood of TransportationIowa DOT Response: HQ Level • Implemented Incident Command System (ICS). • Daily conference calls / webinars with local-state-federal partners, documented with Situation Reports • Weekly detour coordination conference calls with neighboring states (Kansas, Missouri, Nebraska). • Participated in multiple US Army Corps conference calls. • External Communications managed thru Public Information Officer (PIO) in DOT’s Office of Multimedia Services. • DOT’s 24/7 Operations Center posted information via the Iowa 511, e-mail, Twitter and other subscription services. 28
  • 29. Iowa Department 2011 Missouri River Flood of TransportationMulti-state Global DetourJune 13 – June 17 I-29 Detour I-29 in Iowa 150 Extra Miles 152 Miles (Kansas City – Sioux Falls)
  • 30. Iowa DOT Website:Multi-state Global Detour June 17 – October 8 Iowa Nebraska Missouri Kansas
  • 31. Iowa Department 2011 Missouri River Flood of TransportationIowa DOT Response: Local Impacts • A 75 mile stretch of the Missouri River had no open highway crossings. • Detours forced Interstate traffic on to local roads. • The decreased flow of goods and services led to economic displacement in communities along the river. • One of the three Interstate crossings in Omaha-Council Bluffs was closed on June 9. • Movement of large amounts of materials (sand and rock) adversely impacted local roads and residents. 31
  • 32. Iowa Department 2011 Missouri River Flood of TransportationIowa DOT Response: Regional Impacts • The scope and duration of the flooding required substantial coordination between Iowa, Kansas, Missouri and Nebraska. • Coordination between the states and Federal agencies (FHWA, Army Corps of Engineers) aided the response. • Increased efforts were made between the four states to maintain a consistent message and coordinate detours. • A global detour was in place starting in June to address the closure of I-29 in Western Iowa. Detour map hosted by Iowa DOT. 32
  • 33. 33
  • 34. I-680 in Western Iowa 34Receding water reveals damage
  • 35. I-29 in Southwest Iowa 35Debris on roadway after water receded
  • 36. I-680 Reconstruction Project Timeline•Pre-Bid Meeting September 14th•Bid Letting September 23rd•PCI & Reilly Construction $19,239,000•Open to Traffic November 2nd 36
  • 37. 37
  • 38. 38
  • 39. Iowa Department 2011 Missouri River Flood of TransportationFlood Recovery • First road closed June 4th (I-29 SB Hamilton Blvd exit in Sioux City) • I-29 in Council Bluffs opened September 23rd • I-29 in Southern Iowa opened October 8th • I-680 and IA-175 opened November 2nd • Last road opened November 11th (IA-333) Projects Awarded $ 37.8 million Future Projects 2.6 million Total $ 40.4 million 39
  • 40. Iowa Department 2011 Missouri River Floodof Transportation QUESTIONS? 40