Fargo Flood Control

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Fargo Flood Control Southside
Flood Protection Forest River Subdivision
Public Meeting July 21, 2008
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Fargo
Moorhead
Interstate 29
Rose Coulee
Frontier
25th Street South
Red River
Cass Co Hwy 81
Wild Rice River
1997 Spring Flood South of Fargo
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Fargo
Interstate Hwy 94
West Fargo
Southside Flood Control
Moorhead
Preliminary 100 Year Floodplain
Horace
Interstate Hwy 29
Oxbow
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Fargo
Interstate Hwy 94
West Fargo
Southside Flood Control
Moorhead
After Project Preliminary 100 Year
Floodplain With Internal 100 Year Floodplain
Horace
Interstate Hwy 29
Oxbow
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Southside Flood Control

• Provide Protection from overland flooding that
  threatens the majority of properties south of
  I-94.
• Prevent extensive expansion of South Fargo
  Floodplain and mandatory flood insurance
  requirement.
• Provide growth area for Fargo, helping to keep
  our regions economy healthy

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Project Flood Control Methods

• FEMA levees with and without diversion channels
• Channel extensions
• (Red River drain improvements)
• Storage inside of project
• Storage in upstream watershed

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Southside Flood Control
STORAGE SUMMARY Existing effective storage
6,000 Acre-Ft Base project 0
Acre-Ft Channel extension/storage 2,000
Acre-Ft Supplemental storage 4,000
Acre-Ft Upstream dams 75,000 Acre-Ft (External
storage)
STORAGE
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Southside Flood Control
Wild Rice Levee Option Including Mini-Bypass
Alternative
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Southside Flood Control
Levees east of Cass Co. Hwy 81
Forest River
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76th Avenue
Cass Co Hwy 81
1997 Spring Flood South of Fargo
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West Fargo
Fargo
Southside Flood Control
Forest River Existing 100 yr Floodplain
Horace
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West Fargo
Fargo
Southside Flood Control
Forest River Preliminary 100 yr Floodplain
Horace
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West Fargo
Southside Flood Control
Fargo
Forest River Existing and Preliminary 100
yr Floodplains
Horace
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Forest River Subdivision Options Considered

• Option 1
• East and West Levees
• North and South Sandbag Protection Plan
• Option 2
• East and West Levees
• North and South Sandbag Protection Plan
• North and South Road Raises

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Forest River Subdivision

• Option 1
• Components
• Earthen Levee (BFE 4ft)
• East Side
• West Side
• Sandbag Protection Plan (BFE 1ft)
• North Side
• South Side
• Prelim. Geotechnical Completed

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Option 1 - Cost Estimate

• Construction 161K
• Real Estate 25K
• Total Project Cost 186K
• Total Number of Homes Protected 12
• Total Cost / Home 15,500

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Forest River Subdivision

• Option 2
• Components
• Earthen Levee (BFE 4ft)
• East Side
• West Side
• Road Raise (BFE 1ft)
• North Side
• South Side
• Sandbag Protection Plan (BFE 1ft)
• North Side
• South Side
• Prelim. Geotechnical Completed

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Option 2 - Cost Estimate

• Construction 674K
• Real Estate 52K
• Total Project Cost 726K
• Total Number of Homes Protected 12
• Total Cost of Protection / Home - 60,500

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Forest River Floodplain Comparison
Note Options do not provide certified flood
protection.
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Forest River Subdivision
Cost Estimate
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Additional Issues / Next Steps

• Other Options Considered
• Rapid deployment
• 30-320/lf
• Level Surface
• Cleanup

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Additional Issues / Next Steps

• Other Options Considered
• Flood proofing
• 90-100K / per home
• Does not remove need for interior protection
• Proposed Project Hydraulic Benefits (3-6 inches)
• Geotechnical Issues - NTI
• County/Emergency Operations
• Flood Insurance Rates

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Project Schedule
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Southside Flood Control
Wild Rice River Levee Alternative
Base Project w/ Alternatives
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Southside Flood Control
Comment Sheet
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Southside Flood Control
Questions / Discussion
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• Forest River Site Photos

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