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Southside Flood Protection Levees Between I-94 and Cass Hwy. 81 and Mini-Bypass Meeting September 15, 2008 PowerPoint Presentation
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Southside Flood Protection Levees Between I-94 and Cass Hwy. 81 and Mini-Bypass Meeting September 15, 2008. 25 th Street South. St. Benedict. Cass Co Hwy 16. Wild Rice River. Interstate 29. 1997 Spring Flood – South of Fargo. Fargo. Moorhead. Interstate 29. Rose Coulee. Frontier.

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Presentation Transcript
slide1

Southside Flood

Protection

Levees Between I-94 and Cass Hwy. 81

and Mini-Bypass Meeting

September 15, 2008

slide2

25th Street South

St. Benedict

Cass Co Hwy 16

Wild Rice River

Interstate 29

1997 Spring Flood – South of Fargo

slide3

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

slide4

Interstate Hwy 94

Fargo

West Fargo

Southside Flood

Control

Moorhead

Preliminary

100 & 500 Year

Floodplains

Horace

Interstate Hwy 29

Oxbow

slide5
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 region’s economy healthy

Southside Flood Control

slide6

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

southside flood control
Southside Flood Control

North Dakota State Climate Office

slide9

Southside Flood

Control

Wild Rice River Levee

Alternative

Base Project

slide10

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
slide11

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)

slide13

SOUTHSIDE FLOOD CONTROL

Wild Rice River Levees Alternative – Red River Impacts

slide14

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

slide15

Wild Rice River Area Options

Option 1 – No Wild Rice

River Crossing

Option 1: No Wild Rice River Crossing ($5.5 Million)

Option 2 (Base): Wild Rice River Crossing ($15.5 Million)

Option 3: Mini-Bypass

($29.4 Million)

Option 2 – Wild Rice

River Crossing

Option 3 – Mini-Bypass

slide17

Southside Flood Control

Technical Committee Preferred Option

“Mini-Bypass”

slide18

Southside Flood Control

Wild Rice “Mini-Bypass” Fly-Through

slide19

Southside Flood Control

Wild Rice Levee Option

With Red River Channel Extension Options

slide20

Southside Flood

Control

SE Cass Preliminary

Assessment District

Boundary

slide21

Preliminary Assessment Analysis

Completed by Southeast Cass WRD

  • Agricultural Property
  • Total cost per acre – $89.00
  • Total cost per quarter – $14,240.00
  • Average annual cost per acre – $7.30
  • Total cost per quarter – $1,168.00
  • Assumed a 25 year payment schedule at 6.50% interest
slide24

Water Resource District

Assessment District Process

  • Send ballots to all property owners on assessment list.
  • (One ballot per parcel owned)
  • Conduct a project hearing
  • Ballots returned by mail
  • Count all ballots returned
  • (Weighted by amount you pay)
  • If more than 50% of ballots returned vote yes
      • Project proceeds
slide25

Preliminary Assessment Analysis

Completed by Southeast Cass WRD

Reassessment of Benefits

As the undeveloped properties in the assessment district get developed, the WRD can reassess the benefits so all properties pay for similar benefits.

slide26

88th Avenue

Wild Rice River

Highway 81

1997 Spring Flood – South of Fargo

slide28

Southside Flood Control

Questions / Discussion