water, water everywhere
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TRANSCRIPT
2012 Moving Iowa Forward ConferenceTuesday, April 24, 2012
Sheraton, West Des Moines
Mitchell Dillavou, Engineering Bureau DirectorIowa Department of Transportation
Iowa Departmentof Transportation
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The 2011 Missouri River Flood:Coordinating Response and
Recovery
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Iowa Departmentof Transportation 2011 Missouri River Flood
The Missouri River Basin
IowaNebraska
Wyoming
Montana
North Dakota
South Dakota
Missouri
Colorado
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• 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.
Overview of Flood Event
Iowa Departmentof Transportation 2011 Missouri River Flood
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4077
1
-
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
47
51
23
55
33
17
27
14
49
20
37
43
12
31
57
15
34
47
40
25
57
20
55
48
33
28
43
40
18
37
17
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2011 Missouri River Flood Timeline - Iowa Transportation Impacts
2011 Release Rate Typical Year Release Rate
Daily
Ave
rage
Rel
ease
from
Gav
ins P
oint
Dam
- Cu
bic F
eet p
er S
econ
d
6
4077
1
-
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
47
51
23
55
33
17
27
14
49
20
37
43
12
31
57
15
34
47
40
25
57
20
55
48
33
28
43
40
18
37
17
27
2011 Missouri River Flood Timeline - Iowa Transportation Impacts
2011 Release Rate Typical Year Release Rate
Daily
Ave
rage
Rel
ease
from
Gav
ins P
oint
Dam
- Cu
bic F
eet p
er S
econ
d
7
• 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.
Impact upon Iowa’s Primary Roads
Iowa Departmentof Transportation 2011 Missouri River Flood
8Southbound exit / entrance ramps closed
I-29 Hamilton Blvd Interchange - Sioux City
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Iowa Highway 175 Bridge: 1950’s
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Iowa Highway 175 Bridge: 2009
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Iowa Highway 175 Bridge: Summer 2011
Iowa Highway 175 Bridge
13I-29 / I-680 Interchange looking west to Omaha
I-29 / I-680 north of Omaha-Council Bluffs
14I-29 / I-680 Interchange looking southwest to Omaha
I-29 / I-680 north of Omaha-Council Bluffs
15I-29 Looking Southwest toward Council Bluffs
I-29 north of Omaha-Council Bluffs
Levee Breech in Fremont County
17I-29 looking north at MP 15
I-29 in Southwest Iowa
18Water and debris on roadway at MP 1
I-29 in Southwest Iowa
19Drainage ditch under mainline at MP 1 - Two months after flooding began
I-29 in Southwest Iowa
Rail line looking north from Iowa 2 east of I-29
Rail damage in Fremont County
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Looking north from the Missouri border
I-29 at Hamburg
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Communication and Coordination
Iowa Departmentof Transportation 2011 Missouri River Flood
• 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…)
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• 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.
Communication and Coordination
Iowa Departmentof Transportation 2011 Missouri River Flood
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• 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
Iowa DOT Response: District Level
Iowa Departmentof Transportation 2011 Missouri River Flood
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Iowa DOT Response: District Level
Iowa Departmentof Transportation 2011 Missouri River Flood
• 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
26TrapBag installation on southbound I-29 bridge
I-29 MP 107 in Monona County
27Installation of TrapBags on south side of US 30
US 30 West of Missouri Valley
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• 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.
Iowa DOT Response: HQ Level
Iowa Departmentof Transportation 2011 Missouri River Flood
I-29 in Iowa152 Miles
I-29 Detour 150 Extra Miles(Kansas City – Sioux Falls)
Multi-state Global DetourJune 13 – June 17
Iowa Departmentof Transportation 2011 Missouri River Flood
Iowa DOT Website:Multi-state Global Detour
June 17 – October 8
Nebraska
Kansas
Missouri
Iowa
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• 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.
Iowa DOT Response: Local Impacts
Iowa Departmentof Transportation 2011 Missouri River Flood
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• 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.
Iowa DOT Response: Regional Impacts
Iowa Departmentof Transportation 2011 Missouri River Flood
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Receding water reveals damage
I-680 in Western Iowa
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Debris on roadway after water receded
I-29 in Southwest Iowa
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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
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• 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
Iowa Departmentof Transportation 2011 Missouri River Flood
Flood Recovery
Iowa Departmentof Transportation 2011 Missouri River Flood
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