presentation summary

PRESENTATION SUMMARYPRESENTATION SUMMARY• IntroductionIntroduction

– Overview (Overview (M. RyanM. Ryan))• GeographyGeography

– Living with the Red (Living with the Red (M. ClamenM. Clamen))• Conclusions and RecommendationsConclusions and Recommendations

• Accomplishment'sAccomplishment's– Improvements in Flood Forecasting (Improvements in Flood Forecasting (D. LunaD. Luna))

• Mitigation Mitigation (Structural/non-structural/Policy/Legislation changes)(Structural/non-structural/Policy/Legislation changes)– North of the BorderNorth of the Border

• Manitoba (Manitoba (D. McNeilD. McNeil))– South of the BorderSouth of the Border

• US Federal (US Federal (J. DeHarnaisJ. DeHarnais))

• US State—Minnesota US State—Minnesota (Dale Frink)(Dale Frink)• Summary Summary

– What’s next? (What’s next? (M. RyanM. Ryan))

• QuestionsQuestions

Mitigation – US StateMitigation – US State

MinnesotaMinnesota Flood Flood Response and RecoveryResponse and Recovery

Red River ValleyRed River Valley

Mitigation – US StateMitigation – US State

Prepared by: Kent LokkesmoeDirectorDivision of WatersMinnesota Department of Natural Resources

Presented by: Dale Frink

The 1997 flood changed attitudes.

Minnesota Flood Hazard Mitigation Program began in 1989.

It provides 50% state cost share for projects that will reduce flood damages.

(For large projects in small communities, the state has picked up most of the local

share.)

Mitigation – US StateMitigation – US State

Funding History for Minnesota’s Flood Funding History for Minnesota’s Flood Hazard Mitigation ProgramHazard Mitigation Program

0

10

20

30

40

50

$ in Millions

1988

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

Years

Mitigation – US StateMitigation – US State

Mitigation – US StateMitigation – US State

April 24, 1997April 24, 1997Flood Control Projects WorkFlood Control Projects Work

Oslo, MNOslo, MN

Cost $2 million in 1983.Cost $2 million in 1983.Avoided $30 million in damages thru 2001.Avoided $30 million in damages thru 2001.

Mitigation – US StateMitigation – US State

Farmstead Ring DikesFarmstead Ring Dikes

Ring Dike in Red River ValleyRing Dike in Red River Valley

Constructed over 225 Farm

Ring Dikes

Mitigation – US StateMitigation – US State

Floodplain ManagementFloodplain Management

Minnesota requires 1 foot of freeboard above the regulatory flood..

Typical water level

> 15 ft

Regulatory Flood Protection Elevation (RFPE)

100-Year Flood level (including stage increase)1-foot freeboard (minimum)

Top of Bank of Channel or OHWL

Original Ground

Floodway

Flood Fringe

> 15 ft

Fill

Figure 2. Key Standards for Structures in the Flood Fringe

NOTE: NOT TO SCALE!

Mitigation – US StateMitigation – US State

Level of ProtectionLevel of Protection

U.S. – 100 year flood elevation

MN – 100 year +1 foot

Netherlands

Rivers with gradient – 250 yr

Rivers – 1250 yr

North Sea – 10,000 yr

Mitigation – US StateMitigation – US State

ObservationsObservations

Money flows to disasters.

Recovery will take longer and cost more than you estimate.

Requiring a higher level of protection should be considered.

Flood Hazard Mitigation is cost effective.

Mitigation – US StateMitigation – US State