City of Fargo,

1
City of Fargo, Southeast Cass Water Resource
District, Southside Flood Protection Environm
ental Assessment Agency Scoping Meeting December
9, 2008
2
Moorhead
Fargo
50th Avenue South
Rose Coulee
Red River
University Drive
1997 Spring Flood Fargo, Moorhead
3
Fargo
University Drive
Rose Coulee
Cass Co Drain 53
25th Street South
1997 Spring Flood South of Fargo
4
Fargo
Moorhead
Rose Coulee
Interstate 29
25th Street South
Red River
Cass Co Hwy 81
Wild Rice River
1997 Spring Flood South of Fargo
5
25th Street South
St. Benedict
Cass Co Hwy 16
Wild Rice River
Interstate 29
1997 Spring Flood South of Fargo
6
Interstate 29
St. Benedict
Cass Co Hwy 16
Cass Co Drain 47
Wild Rice River
1997 Spring Flood South of Fargo
7
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, helping to keep our regions
  economy healthy.

8
Fargo
Interstate Hwy 94
Southside Flood Control
West Fargo
Moorhead
Red River
Cass Co Hwy 6
1997 Spring Flood Areas Inundated With
Floodwater and Estimate of Areas Protected
by Emergency Measures
Interstate Hwy 29
Horace
Cass Co Hwy 14
Wild Rice River
Sheyenne River
Cass Co Hwy 16
Red River
Oxbow
Cass Co Hwy 18
9
Fargo
Interstate Hwy 94
West Fargo
Southside Flood Control
Moorhead
Preliminary 100 500 Year Floodplains Red and
Wild Rice Rivers
Horace
Interstate Hwy 29
Oxbow
10
(No Transcript)
11
Southside Flood Control
North Dakota State Climate Office
12
Project Flood Control Methods

• FEMA levees floodwalls
• Channel extensions
• (Red River drain improvements)
• Floodwater storage inside of project
• Pump stations
• Control structures

13
Southside Flood Control
Wild Rice River Levee Alternative
Base Project
14
Issues Raised With Base Alternatives

• Red River Wild Rice River impacts (Higher flood
  levels)
• Lost storage (Concern storage impact will simply
  move impacts upstream)
• Properties east of Hwy 81 and upstream receive no
  protection

15
Southside Flood Control
Wild Rice River Levee Alternative with Channel
Extensions Supplemental Storage
16
Wild Rice River Levees Alternative Red River
Impacts
17
Southside Flood Control
Wild Rice River Levee Alternative Selected
Plan River Stage Changes 100 Year Flood
18
Interstate Hwy 94
Southside Flood Control
Interstate Hwy 29
Preliminary 100 Year Floodplain
Horace
19
Interstate Hwy 94
Southside Flood Control
Interstate Hwy 29
Preliminary 100 Year Floodplain with Line of
Protection
Horace
20
Interstate Hwy 94
Southside Flood Control
Interstate Hwy 29
After Project Preliminary 100 Year Floodplain
Horace
21
Fargo
Moorhead
Red River
1997 Spring Flood Burritt Kennedy, Lemke and
Harwood Groves Area
22
Modifications to Base Project

• 32nd to 40th Avenue South
• Pursue primary protection through backyards
• South Acres
• Include in primary protection alignment
• Channel Extension Alignment
• Chrisan West
• Include in primary protection alignment
• Maple Prairie
• Include in primary protection alignment

23
Modifications to Base Project

• Mini Bypass (Wild Rice River)
• Pursue mini bypass alignment
• to protect additional properties
• Storage Plan Drain Improvements
• Pursue storage along Drain 27
• Chrisan East
• Pursue secondary protection

24
Option 1 - River Side Permanent FW
32nd to 40th Avenue Backyard Options
25
Wild Rice River Area Options
Option 1 No Wild Rice River Crossing
Option 1 No Wild Rice River Crossing Option 2
(Base) Wild Rice River Crossing Option 3
Mini-Bypass
Option 2 Wild Rice River Crossing
Option 3 Mini-Bypass
26
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
27
Southside Flood Control
Red River Channel Extension Options
28
North Dakota
Minnesota
Red River Channel Extension
Red River
Typical Red River Cross-Section
29
Southside Flood Control
Wild Rice River Levee Alternative with Preferred
Alignments
30
Fargo
Moorhead
25th Street South
University Drive
Rose Coulee
Red River
1997 Spring Flood South of Fargo
31
Project Schedule Next Steps

• Environmental Assessment
• Conditional Letter of Map Revision (CLOMR)
• Permitting
• Special Assessment Process
• Development of Final Design

32
Southside Flood Control
Questions / Discussion