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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.

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Presentation on theme: "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."— Presentation transcript:

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 Advisory Council Meeting Wednesday, March 31 st 2010

2 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 feet on Sunday, March 21 st. This was the 7 th 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 years 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

3 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 ESRIs ArcGIS API for FLEX – ProWest and Associates

4 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

5 Emergency Measures feet36.99 feet Clay levees 71,500 cubic yards10,000 cubic yards 8 miles1 mile Sandbag levees 2.5 million300,000 9 miles 2.7 miles Storm & Sanitary sewers 62 manholes with temporary plugs emergency pumps rented 28

6 Lessons Learned from 2009 & 2010 Interim measures are needed: o o Less dependent on external resources that take time to mobilize o o More permanent measures for quicker implementation (flood gates, pump stations, short levees, etc) Long-term measures are needed: o o Comprehensive flood risk management for the Moorhead & Fargo metro area o o US Corps of Engineers working with Moorhead and Fargo on Diversion Channel Alternatives

7 Interim Infrastructure Projects & Property Acquisition Funding Source Interim Infrastructure Property Acquisitions Total DNR FDR agreement $19.1M$19.7M$38.8M Funds committed Federal($0.0M)($0.2M) State($0.6M)($7.4M)($8.0M) Local($7.1M)($1.1M)($8.2M) Total($7.7M)($8.7M) [49]($16.4M) Balance to complete $11.4M $11.0M [48] $22.4M DNR FDR Agreement signed mid-July, 2009

8 Flood Mitigation Projects in the City of Moorhead Green dots signify Projects that were completed in 2009 Overall, there are approximately 80 flood mitigation projects that will improve city infrastructure and result in much higher levels of protection from flooding

9 Fargo-Moorhead Metro Project (35K) Diversion Project alignment MNMNND Estimated cost $1,143M$1,143M$1,295M Maximum Federal cost-share NED65%NED Federal cost-share $566M$743M$566M Local cost-share $577M$400M$729M ND cost-share (90%) $519M$360M$656M MN cost-share (10%) $58M$40M$73M Maximum eligible for State bonding Full cost $50M$50M Required from State General Fund, Local, or other? $0$0 $23M$23M

10 Alignment Alternatives released by the US Army Corps of Engineers for the Fargo – Moorhead Metro Area Feasibility Study. ( October 19 th 2009 ) Fargo, ND Moorhead, MN

11 Moorheads Old Emergency Flood Plan > 65 Action Steps o o Storm & Sanitary sewer gate closures & plugs o o Activate pump stations o o Deploy emergency pumps o o Road closures o o Short levees, etc… Measures designed for o o Typical spring flood event with significant warning o o Methodical implementation Expanded to 180 actions after the flood of 2009

12 First Action Steps of the Old Emergency Flood Manual

13 New Action Steps for Emergency Flood Manual added during the flood of 2009

14 Old (Pre 2009) Emergency Flood manual in GIS

15 New\Updated Emergency Flood manual in GIS

16 Moorheads New Eight Neighborhood Flood Zones City staff from Engineering, Police and Fire stationed in each Zone throughout the day and night Established Neighborhood liaisons for more effective communication with the public

17 Map Books for Zone Staff – Sub Zone Maps with Labeled Flood Plan Steps

18 ArcGIS API for FLEX Developed by ProWest and Associates

19 Interactive ½ Foot River Stages and which stage may affect structures

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21 ArcGIS Server Internal Application - Flood 2010 Information for City Staff

22 GIS Data Layers in Moorhead WebFusion

23 GPS Collected Data before and after Sandbag and Levee Construction

24 River Modeling Cross Sections with Profile Elevations & 1 Foot Contours

25 Historical Information – 1997 and 2009 Crest Orthoimagery

26 Post Flood - Call Center Records Mapped for Documentation of Event

27 City of Moorhead Geographic Information Systems Brad Anderson, GISP City of Moorhead GIS

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33 City of Moorhead Geographic Information Systems Brad Anderson, GISP City of Moorhead GIS


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