southside flood protection red river channel extension clay county courthouse september 8, 2008
TRANSCRIPT
Southside FloodProtection
Red River Channel ExtensionClay County Courthouse
September 8, 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
Base Project withChannel Extensions
& Recoverable Storage
Southside Flood
Control
Wild Rice River Levee
Alternative
Rose CouleePump Station
& Closure Structure
North Dakota
Minnesota
Red River
Red RiverChannel
Extension
Typical Red River Cross-Section
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
STORAGE
Southside Flood
Control
100 Year Frequency - Red River Stage Changes in Inches
Base Project with Channel Extensions & Supplemental Storage
LocationWild Rice
River Levees
70th Ave So Outlet
Rose Coulee Outlet
Wild Rice River
Diversion
Wild Rice River
BypassInterstate 94 0 0 0 0 0
Rose Coulee 0 0 0 0 0
Briarwood -6 -6 -8 -6 -6
76th Avenue -7 -7 -11 -7 -7
Wild Rice River -8 -5 -12 -8 -8
Cass Hwy 16 -4 -4 -9 -4 -5
Oxbow -1 -1 -2 -1 -2
Cass Hwy 18 -1 -1 -2 -1 -1
SOUTHSIDE FLOOD CONTROL
Wild Rice River Levees Alternative – Red River Impacts
SOUTHSIDE FLOOD CONTROLIn
ters
tate
94
Ros
e C
oule
e
Bria
rwoo
d
76th
Ave
Wild
Ric
e R
iver
Cas
s H
wy
16 B
ridge
Cas
s H
wy
18 B
ridge
-10.0
-8.0
-6.0
-4.0
-2.0
0.0
2.0
4.0
6.0
8.0
10.0
12.0
455 460 465 470 475 480 485 490
Sta
ge
Ch
ang
e (I
nch
es)
River Mile
Southside Flood ControlRed River Stage Change - 100 Year Event
Wild Rice River Levees Alternative
w/ Supplemental Storage w/ Levees East of Hwy 81
Zero Impact Line
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 - 32nd Ave So./River Oaks Park
880
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
Existing
Project
Red River - 100 Year Flood - 32nd Ave So./River Oaks Park
904.00
904.25
904.50
904.75
905.004/
2
4/4
4/6
4/8
Wat
er S
urfa
ce E
leva
tion
Existing
Levees Only
Project
0.72 Inches
26 Hours
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 FloodProtection
Red River Channel Extension Fly Through
1997 Spring Flood – South of Fargo
Interstate 29
Cass
Co
Hw
y 81
25th Street S
outh
Project ScheduleDevelopment of options east of University DriveDevelopment of options east of University Drive April-June 2008April-June 2008
City Commission Selection of preferred base City Commission Selection of preferred base alternativealternative
July 14, 2008July 14, 2008
Public input meetingsPublic input meetings April 15 - September 2008April 15 - September 2008
Environmental AssessmentEnvironmental Assessment July – December 2008July – December 2008
Consultant SelectionConsultant Selection July - September 2008July - September 2008
Begin DesignBegin Design October 2008October 2008
CLOMR SubmittalCLOMR Submittal July – October 2008July – October 2008
CLOMR ApprovalCLOMR Approval December 2008December 2008
ROW AcquisitionsROW Acquisitions October 2008 – October 2009October 2008 – October 2009
PermittingPermitting September 2008 – April 2009September 2008 – April 2009
Special Assessment DistrictSpecial Assessment District September – December 2008September – December 2008
Begin ConstructionBegin Construction June 2009June 2009
Functional CompletionFunctional Completion March 2011March 2011
Final CompletionFinal Completion July 2012July 2012
Questions / Discussion
Southside Flood Control