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1. 2012 Moving Iowa Forward Conference
Tuesday, April 24, 2012
Sheraton, West Des Moines
Mitchell Dillavou, Engineering Bureau Director
Iowa Department of Transportation
3. Iowa Department
2011 Missouri River Flood
of 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 27th
Daily 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 Transportation
Impact 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
22. Iowa Department
2011 Missouri River Flood
of Transportation
Communication 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 Transportation
Communication 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 Transportation
Iowa 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 Transportation
Iowa 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 Valley
Installation of TrapBags on south side of US 30 27
28. Iowa Department
2011 Missouri River Flood
of Transportation
Iowa 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 Transportation
Multi-state Global Detour
June 13 – June 17
I-29 Detour
I-29 in Iowa
150 Extra Miles
152 Miles
(Kansas City – Sioux Falls)
31. Iowa Department
2011 Missouri River Flood
of Transportation
Iowa 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 Transportation
Iowa 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
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
39. Iowa Department
2011 Missouri River Flood
of Transportation
Flood 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 Flood
of Transportation
QUESTIONS?
40
Notas del editor
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\\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.