MnGeo State Government Geospatial Advisory Council Meeting Wednesday, September 26, 2012
City of Moorhead Geographic Information Systems The City of Moorhead and the Flood of 2010 Brad...
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![Page 1: City of Moorhead Geographic Information Systems The City of Moorhead and the Flood of 2010 Brad Anderson, GISP City of Moorhead GIS MnGeo Statewide Geospatial.](https://reader034.fdocuments.us/reader034/viewer/2022050819/56649b55550346318e8d2200/html5/thumbnails/1.jpg)
City of MoorheadCity of MoorheadGeographic Information SystemsGeographic Information Systems
The City of MoorheadThe City of Moorheadand the Flood of 2010and the Flood of 2010
Brad Anderson, GISPBrad Anderson, GISP
City of Moorhead GISCity of Moorhead GISMnGeo Statewide Geospatial Advisory Council MeetingMnGeo Statewide Geospatial Advisory Council Meeting
Wednesday, March 31Wednesday, March 31stst 2010 2010
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The Flood of 2010 at the City of Moorhead
The spring flood of 2010 crested in the Moorhead and Fargo metro area at a river stage of 36.99 feet on Sunday, March 21st. This was the 7th highest crest on record.
This event was easier for the City to manage not only because it was 4 feet lower than the record crest of 2009, but for the experience gained from last year’s event and actions implemented to mitigate future floods.
• Aggressive flood mitigation infrastructure projects• Emergency Flood Plan Manual updated with the goal of protecting Moorhead to a river stage of 43 feet• Division of the City into eight zones, with Engineering, Police and Fire staff committed to each Zone• Zone Map Books – Flood Plan steps and stage elevations
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The Flood of 2010 at the City of Moorhead
There were also two new GIS applications that assisted city staff and residents during the 2010 flood
• ArcGIS Server interactive flood website displaying ½ foot incremental river stages from 18 feet to 43 feet
• Difficult to estimate the number of telephone calls to City Hall that were eliminated as a result of this new website
• Property and Structure flood stage information• Spatial geoprocessing provides critical river stage information for all property and structures in the city
ESRI’s ArcGIS API for FLEX – ProWest and Associates
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The Flood of 2010 at the City of Moorhead
An internal ArcGIS Server website to provide flood related information to city staff
WebFusion - Developed by ProWest and Associates
The surprising early crest prediction and rapid rise of the Red River prevented deployment before the flood; now in place as a post flood information application
These web-based GIS applications proved extremely useful and efficient in disseminating flood related information and GIS data to city staff and to the public
Both applications utilize GIS data hosted locally and from the Moorhead & Clay County shared SDE geodatabase
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Emergency Measures
2009 2010 40.84 feet 36.99 feet
Clay levees71,500 cubic yards 10,000 cubic
yards8 miles 1 mile
Sandbag levees2.5 million 300,000≈ 9 miles ≈ 2.7 miles
Storm & Sanitary sewers 62 manholes with temporary plugs 20 61 emergency pumps rented 28
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Lessons Learned from 2009 & 2010
• Interim measures are needed:o Less dependent on external resources that
take time to mobilizeo More permanent measures for quicker
implementation (flood gates, pump stations, short levees, etc)
• Long-term measures are needed:o Comprehensive flood risk management for the
Moorhead & Fargo metro areao US Corps of Engineers working with Moorhead
and Fargo on Diversion Channel Alternatives
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Interim Infrastructure Projects & Property AcquisitionInterim Infrastructure Projects & Property Acquisition
Funding SourceFunding SourceInterim Interim
InfrastructurInfrastructuree
Property Property AcquisitionsAcquisitions TotalTotal
DNR FDR agreementDNR FDR agreement $19.1M$19.1M $19.7M$19.7M $38.8M$38.8M
Funds committedFunds committed
FederalFederal ($0.0M) ($0.2M) ($0.2M)
StateState ($0.6M) ($7.4M) ($8.0M)
Local Local ($7.1M) ($1.1M) ($8.2M)
TotalTotal ($7.7M)($8.7M)
[49]($16.4M)
Balance to completeBalance to complete $11.4M$11.4M $11.0M $11.0M [48][48] $22.4M$22.4M
DNR FDR Agreement signed mid-July, 2009DNR FDR Agreement signed mid-July, 2009
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Flood Mitigation Projectsin the City of Moorhead
Green dots signifyProjects that werecompleted in 2009
Overall, there areapproximately 80 floodmitigation projects thatwill improve cityinfrastructure and resultin much higher levels ofprotection from flooding
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Fargo-Moorhead Metro Project Fargo-Moorhead Metro Project (35K)(35K)
Diversion Project Diversion Project alignmentalignment
MNMN MNMN NDND
Estimated costEstimated cost $1,143$1,143MM
$1,143M$1,143M $1,295M$1,295M
Maximum Federal cost-Maximum Federal cost-shareshare
NEDNED 65%65% NEDNED
Federal cost-shareFederal cost-share $566M$566M $743M$743M $566M$566M
Local cost-shareLocal cost-share $577M$577M $400M$400M $729M$729M
ND cost-share (90%)ND cost-share (90%) $519M$519M $360M$360M $656M$656M
MN cost-share (10%)MN cost-share (10%) $58M$58M $40M$40M $73M$73M
Maximum eligible for Maximum eligible for State bondingState bonding Full Full
costcostFull costFull cost ≈≈$50M$50M
Required from State Required from State General Fund, Local, or General Fund, Local, or other?other?
$0$0 $0$0 ≈≈$23M$23M
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Alignment Alternatives released by the US Army
Corps of Engineers for the Fargo – Moorhead Metro
Area Feasibility Study.
( October 19th 2009 )Fargo, ND
Moorhead, MN
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Moorhead’s Old Emergency Flood Plan
• > 65 Action Stepso Storm & Sanitary sewer
gate closures & plugso Activate pump stationso Deploy emergency pumpso Road closureso Short levees, etc…
• Measures designed foro Typical spring flood event
with significant warningo Methodical implementation
• Expanded to 180 actions after the flood of 2009
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First Action Steps of the Old Emergency Flood Manual
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New Action Steps for Emergency Flood Manual added during the flood of 2009
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Old (Pre 2009) Emergency Flood manual in GIS
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New\Updated Emergency Flood manual in GIS
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Moorhead’s New EightNeighborhood FloodZones
City staff fromEngineering, Police andFire stationed in eachZone throughout the dayand night
Established Neighborhood
liaisons for more effective
communication with thepublic
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Map Books for Zone Staff – Sub Zone Maps with Labeled Flood Plan Steps
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ArcGIS API for FLEX Developed by ProWest and Associates
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Interactive ½ Foot River Stages and which stage may affect structures
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http://gis.cityofmoorhead.com/floodstages/index.html
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ArcGIS Server Internal Application - Flood 2010 Information for City Staff
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GIS Data Layers in Moorhead WebFusion
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GPS Collected Data before and after Sandbag and Levee Construction
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River Modeling Cross Sections with Profile Elevations & 1 Foot Contours
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Historical Information – 1997 and 2009 Crest Orthoimagery
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Post Flood - Call Center Records Mapped for Documentation of Event
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City of MoorheadCity of MoorheadGeographic Information SystemsGeographic Information Systems
Brad Anderson, GISPBrad Anderson, GISPCity of Moorhead GISCity of Moorhead GIS
219.299.5125219.299.5125
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City of MoorheadCity of MoorheadGeographic Information SystemsGeographic Information Systems
Brad Anderson, GISPBrad Anderson, GISP
City of Moorhead GISCity of Moorhead GIS219.299.5125219.299.5125