Southside FloodProtection

Red River Channel Extension

September 15, 2008

1997 Spring Flood –Fargo, Moorhead

Rose Coulee

Red River

Fargo

50th Avenue South

Moorhead

Univ

ers

ity D

rive

1997 Spring Flood – South of Fargo

Rose CouleeRed River

25th S

treet

Sou

th

Fargo

University DriveMoorhead

60th Ave. SW

Preliminary 100 & 500 Year

Floodplains

Oxbow

Horace

MoorheadWest Fargo

FargoInterstate Hwy 94

Inte

rsta

te H

wy 2

9

Southside Flood

Control

RED RIVER AT FARGO - USGS GAGING STATIONHISTORICAL FLOOD DATA

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

1880 1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000

Years of Record

50 Year Discharge - 22,300 CFS

10 Year Discharge - 10,300 CFS

100 Year Discharge - 29,300 CFS

Pea

k D

isch

arge

(CFS)

1997 Spring Flood - 28,000 CFS

Southside Flood Control

North Dakota State Climate Office

• FEMA levees with and without diversion channels

• Channel extensions(Red River & drain improvements)

• Storage inside of project

• Storage in upstream watershed

Project Flood Control Methods

Base Project

Southside Flood

Control

Wild Rice River Levee Alternative

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

CHANNEL EXTENSION AND

STORAGE SUMMARYExisting effective storage 6,000 Acre-Ft

Base project 0 Acre-Ft

Channel extension/storage 2,000 Acre-Ft

Supplemental storage 4,000 Acre-Ft

Southside Flood

Control

North Dakota

Minnesota

Red River

Red RiverChannel

Extension

Typical Red River Cross-Section

SOUTHSIDE FLOOD CONTROL

Wild Rice River Levees Alternative – Red River Impacts

SOUTHSIDE FLOOD CONTROL

Wild Rice River Levees Alternative – Red River Impacts

Red River Flood Timing

Red River - Average Channel Velocity Comparison

Wild

Ric

e R

iver

Cas

s H

wy

16 B

ridge

Mai

n A

ve B

ridge

Inte

rsta

te 9

4

Ros

e C

oule

e

Bria

rwoo

d

76th

Ave

nue

Sou

th

Cas

s H

wy

18 B

ridge

52nd

Ave

Bri

dge

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

450.00 455.00 460.00 465.00 470.00 475.00 480.00 485.00 490.00

River Miles

Ave

rag

e C

han

nel

Vel

oci

tyProject Existing

0.36 fps

Red River - Average Channel Velocity Change

Wild

Ric

e R

iver

Cas

s H

wy

16 B

ridge

Mai

n A

ve B

ridge

Inte

rsta

te 9

4

Ros

e C

oule

e

Bria

rwoo

d

76th

Ave

nue

Sou

th

Cas

s H

wy

18 B

ridge

52nd

Ave

Bri

dge

-0.100

0.000

0.100

0.200

0.300

0.400

0.500

0.600

0.700

0.800

450.00 455.00 460.00 465.00 470.00 475.00 480.00 485.00 490.00

River Miles

Vel

oci

ty C

han

ge

- F

eet

per

Sec

on

d

Red River - 100 Year Flood - 52nd Ave So.

885

890

895

900

905

9103/

24

3/26

3/28

3/30 4/

1

4/3

4/5

4/7

4/9

4/11

4/13

4/15

4/17

Wat

er S

urfa

ce E

leva

tion

ExistingProject

Red River - 100 Year Flood - 52nd Ave S./60th Avenue SW

906.0

906.5

907.0

907.5

908.04/

1

4/3

4/5

4/7

4/9

Wat

er S

urfa

ce E

leva

tion

Existing

Levees Only

Project26 Hours

3.2 Inches

1997 Spring Flood – South of Fargo

Rose CouleeRed River

25th S

treet

Sou

th

Fargo

University DriveMoorhead

Southside Flood Control

Red River Channel

Extension Options

Southside Flood Control

Technical Committee Preferred Option:

North Dakota Alignment

Southside FloodProtection

Red River Channel Extension Fly Through

Southside Flood

Control

Technical Committee Preferred

Alignments

1997 Spring Flood – South of Fargo

Interstate 29

Cass

Co

Hw

y 81

25th Street S

outh

Project ScheduleDevelopment of options east of University Drive April-June 2008

City Commission Selection of preferred base alternative

July 14, 2008

Public input meetings April 15 - September 2008

Environmental Assessment July – December 2008

Consultant Selection July - December 2008

Begin Design December 2008

CLOMR Submittal July – December 2008

CLOMR Approval March 2009

ROW Acquisitions October 2008 – October 2009

Permitting September 2008 – April 2009

Special Assessment District September – December 2008

Begin Construction June 2009

Functional Completion March 2011

Final Completion July 2012

Questions / Discussion

Southside Flood Control