North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street...
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Transcript of North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street...
![Page 1: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/1.jpg)
2nd Street/Downtown Flood Control Improvement Project
Commission UpdateSeptember 3, 2013
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North Section 1st Avenue to
RR
North Section NP
to RR
South Section
1st Avenue to 4th Street
Levee
South Section
1st Avenue to 4th Street
Levee
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Project Considerations• Flood protection capability• Geotechnical
stability/sustainability• Private property impacts• Traffic/transportation impacts• Parking impacts• Utility impacts• Environmental impacts• River connectivity• Public green space
opportunities• Economic development
opportunities• Operation/maintenance
requirements• Costs
![Page 4: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/4.jpg)
Early Concept Plan Development• Numerous alignments• Multiple methods• Varied levels of protection• Geotechnical evaluation• Traffic analysis• Environmental
assessments• Project costs estimates• Preliminary design
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Options for Consideration• Option 1A – Floodwall Base
Option
• Option 1B – Floodwall with Additional 2nd Street Relocation
• Option 1C – Floodwall with 2nd Street Abandonment
• Option 2 – Floodwall with 2nd Street Tunnel / Grade Separation Structure
![Page 6: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/6.jpg)
Option 1A – Floodwall Base Option
• Realignment of 2nd Street• Floodwall with 3 closures• 3 Private property
acquisitions
Cost - $23.2M
(Construction Only)
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Option 1B – Floodwall – Added 2nd Street Relocation
• Additional 2nd Street Realignment
• Added removable floodwall section
• Increased dryside green-space/ connectivity opportunity (location will vary)
Cost - $23.5M
(Construction Only)
Pedestrian overpass opportunity – actual
location to be determined as part of redevelopment
planning
![Page 8: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/8.jpg)
Option 1C – Floodwall – 2nd Street Abandonment
• 2nd Street abandonment (12,500 ADT)
• Reduced private property impacts
• Increased redevelopment opportunities
Cost - $21.8M
(Construction Only)
![Page 9: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/9.jpg)
Option 2 – Floodwall – 2nd Street Tunnel/Grade Separation
• Tunnel – Increased redevelopment opportunities
• Improved river visibility/connectivity
• Additional private property impacts
Cost - $44.1M
(Construction Only)
![Page 10: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/10.jpg)
Option Consideration Comparison
Num
ber
of s
truc
ture
ac
quis
ition
s A
ppro
x. A
sses
sed
Valu
e
Out
side
LD
ZS/M
DZS
with
in L
DZS
(450
-ft)
with
in M
DZS
(350
-ft)
Option 1A Floodwall Base Option
Good 2.5
$2.8
M
Low Low High Low Low 2.8
0.96
1.35
0.49 Low $23.2M
Option 1B Floodwall with Additional
2nd Street RelocationGood 2.5
$2.8
M
Low High High Low Medium 2.6
1.00
1.40
0.20 Medium $23.5M
Option 1C Floodwall with 2nd Street
AbandonmentGood 2
$2.2
M
High Low High Low High 3.5
0.94
1.47
1.09 Low $21.8M
Option 2 Floodwall with 2nd Street
TunnelGood 3
$4.8
M
Low High High Low High 4.2*
2.34
*
1.73
0.13 High $44.1M
Rive
r con
necti
vity
/ vi
sibilit
y
Publ
ic gr
een
spac
e op
port
uniti
es (a
cres
)
Ope
ratio
n/m
aint
enan
ce re
quire
men
ts
Cost
s (m
illion
s - C
onst
ructi
on O
nly)
Priv
ate
prop
erty
im
pact
s
Rede
velo
pmen
t op
port
uniti
es (a
cres
)
Envi
ronm
enta
l impa
cts
Option Floo
d pr
otec
tion
capa
bilit
y
Traffi
c/tr
ansp
orta
tion
impa
cts
Park
ing
impa
cts
Util
ity im
pact
s
“all options meet flood protection needs and are technically feasible”
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Redevelopment/Setback Requirements
Geotechnical Stability Requirements• Soil Borings• Slope Stability Evaluation• Foundation Bearing Capacity• Seepage Analysis• Settlement Analysis• Minimum Design Requirements
(USACE and FEMA)
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Redevelopment/Setback Requirements
River Setback Requirements – Stability Concerns• Minimal Disturbance Zone Setback (MDZS) –
350ft• ESSENTIALLY NO “DISRUPTIVE” ACTIVITY ALLOWED
• Limited Disturbance Zone Setback (LDZS) – 450ft• ONLY LIMITED “DISRUPTIVE” ACTIVITY ALLOWED• Development would require wavier
• No Impact to Floodwall Stability would be required.
MDZS
LDZS
![Page 13: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/13.jpg)
Redevelopment/Setback Requirements
River Setback Requirements – Stability Concerns• Minimal Disturbance Zone Setback (MDZS) –
350ft• ESSENTIALLY NO “DISRUPTIVE” ACTIVITY ALLOWED
• Limited Disturbance Zone Setback (LDZS) – 450ft• ONLY LIMITED “DISRUPTIVE” ACTIVITY ALLOWED• Development would require wavier
• No Impact to Floodwall Stability would be required.
MDZS
LDZS
![Page 14: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/14.jpg)
Option Consideration Comparison
Num
ber
of s
truc
ture
ac
quis
ition
s A
ppro
x. A
sses
sed
Valu
e
Out
side
LD
ZS/M
DZS
with
in L
DZS
(450
-ft)
with
in M
DZS
(350
-ft)
Option 1A Floodwall Base Option
Good 2.5
$2.8
M
Low Low High Low Low 2.8
0.96
1.35
0.49 Low $23.2M
Option 1B Floodwall with Additional
2nd Street RelocationGood 2.5
$2.8
M
Low High High Low Medium 2.6
1.00
1.40
0.20 Medium $23.5M
Option 1C Floodwall with 2nd Street
AbandonmentGood 2
$2.2
M
High Low High Low High 3.5
0.94
1.47
1.09 Low $21.8M
Option 2 Floodwall with 2nd Street
TunnelGood 3
$4.8
M
Low High High Low High 4.2*
2.34
*
1.73
0.13 High $44.1M
Rive
r con
necti
vity
/ vi
sibilit
y
Publ
ic gr
een
spac
e op
port
uniti
es (a
cres
)
Ope
ratio
n/m
aint
enan
ce re
quire
men
ts
Cost
s (m
illion
s - C
onst
ructi
on O
nly)
Priv
ate
prop
erty
im
pact
s
Rede
velo
pmen
t op
port
uniti
es (a
cres
)
Envi
ronm
enta
l impa
cts
Option Floo
d pr
otec
tion
capa
bilit
y
Traffi
c/tr
ansp
orta
tion
impa
cts
Park
ing
impa
cts
Util
ity im
pact
s
![Page 15: North Section 1 st Avenue to RR North Section NP to RR South Section 1 st Avenue to 4 th Street Levee South Section 1 st Avenue to 4 th Street Levee.](https://reader030.fdocuments.net/reader030/viewer/2022032612/56649f095503460f94c1dd77/html5/thumbnails/15.jpg)
Additional Aesthetic Enhancement Opportunities Covington KY –
Adjacent Development
Example
East Grand Forks –
Removable Panel Example
Grand Forks – Aesthetic Treatment
Example
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Questions?
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Website & Public Commentwww.CityofFargo.com/2ndStFloodProtection