HomeMy WebLinkAboutCityofEdinaFloodResilienceFactSheets-02242020_CouncilWorkSessionActions for Flood Resilient Homes:
Actions and Programs Overview
Surface water ooding
Sanitary back ow
Groundwater seepage
Where does the water in my home come from?
Flood waters come from di erent sources. No matter the source, all can cause extensive damage to your home. Depending
on the situation, di erent strategies will work better than others to prevent damage to your property from the excess water.
Gathering more information about how the water is entering your home, such as through a home drainage assessment, will
help you choose the correct solution. Typical scenarios can include:
Sanitary back ow ooding can be caused by a blockage in the city’s sewer system.
This normally occurs when the sewer pipes are ooded with stormwater. When
this happens, wastewater can ow backwards—into your home.
Severe storms or prolonged periods of wet weather can cause water levels in creeks,
ponds, lakes, and rivers to rise and over ow their banks. If your home is near these water
bodies or in a low-lying area, it can be at risk of ooding. Surface water can also cause
what’s known as “ ash ooding.” Because it occurs with little notice, ash ooding can catch
people o guard. This normally occurs when existing drainage systems are overwhelmed by
extremely heavy rain. Instead of soaking into the ground or draining through stormwater
sewers, the water ows over the land surface, collecting in low-lying areas. Urban areas can
be particularly vulnerable to ash ooding due to a greater amount of impervious surface.
Groundwater can also be a source of ooding. This tends to occur after long periods
of heavy rain or snowmelt, when more water in ltrates the ground and causes the
groundwater to rise above the home’s foundation level.
There’s no doubt about it. No matter where you live in the Twin Cities area, it’s been tough to stay dry. In fact, the years
between 2015 and 2019 were the wettest in Minnesota history. And, with our changing climate, we can expect more wet
years, more powerful storms—and more ooding.
The City of Edina is committed to making this a ood-resilient community. That’s why we’ve adopted a ood-risk-reduction
strategy that includes helping our residents make their homes and property ood resilient. To encourage you to do what you
can to minimize your ood risk, we’ve developed factsheets on ood prevention and mitigation strategies. These factsheets, on
topics ranging from sump pumps to sandbags, are now available on our website. They’re designed to get you thinking about
ways to protect your home and provide you with information about available resources.
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
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Surface water ooding
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Surface water ooding
Where does the water in my home come from?D
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Where does the water in my home come from?
Flood waters come from di erent sources. No matter the source, all can cause extensive damage to your home. Depending
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Flood waters come from di erent sources. No matter the source, all can cause extensive damage to your home. Depending
on the situation, di erent strategies will work better than others to prevent damage to your property from the excess water.
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on the situation, di erent strategies will work better than others to prevent damage to your property from the excess water.
Gathering more information about how the water is entering your home, such as through a home drainage assessment, will
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Gathering more information about how the water is entering your home, such as through a home drainage assessment, will
help you choose the correct solution. Typical scenarios can include:
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help you choose the correct solution. Typical scenarios can include:
Sanitary back ow ooding can be caused by a blockage in the city’s sewer system.
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Sanitary back ow ooding can be caused by a blockage in the city’s sewer system.
This normally occurs when the sewer pipes are ooded with stormwater. When
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This normally occurs when the sewer pipes are ooded with stormwater. When
Severe storms or prolonged periods of wet weather can cause water levels in creeks,
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Severe storms or prolonged periods of wet weather can cause water levels in creeks,
ponds, lakes, and rivers to rise and over ow their banks. If your home is near these water
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ponds, lakes, and rivers to rise and over ow their banks. If your home is near these water
bodies or in a low-lying area, it can be at risk of ooding. Surface water can also cause
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bodies or in a low-lying area, it can be at risk of ooding. Surface water can also cause
what’s known as “ ash ooding.” Because it occurs with little notice, ash ooding can catch
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what’s known as “ ash ooding.” Because it occurs with little notice, ash ooding can catch
people o guard. This normally occurs when existing drainage systems are overwhelmed by
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people o guard. This normally occurs when existing drainage systems are overwhelmed by
extremely heavy rain. Instead of soaking into the ground or draining through stormwater
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extremely heavy rain. Instead of soaking into the ground or draining through stormwater
sewers, the water ows over the land surface, collecting in low-lying areas. Urban areas can
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sewers, the water ows over the land surface, collecting in low-lying areas. Urban areas can
be particularly vulnerable to ash ooding due to a greater amount of impervious surface.
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be particularly vulnerable to ash ooding due to a greater amount of impervious surface.
strategy that includes helping our residents make their homes and property ood resilient. To encourage you to do what you
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strategy that includes helping our residents make their homes and property ood resilient. To encourage you to do what you
can to minimize your ood risk, we’ve developed factsheets on ood prevention and mitigation strategies. These factsheets, on
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can to minimize your ood risk, we’ve developed factsheets on ood prevention and mitigation strategies. These factsheets, on
topics ranging from sump pumps to sandbags, are now available on our website. They’re designed to get you thinking about D
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topics ranging from sump pumps to sandbags, are now available on our website. They’re designed to get you thinking about
ways to protect your home and provide you with information about available resources.D
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ways to protect your home and provide you with information about available resources.
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Actions can reduce exposure or vulnerabilityHome retro tting and
ood prevention devices
The table below provides a quick overview of some
common actions you can take to create more ood
resilient buildings and landscapes. The fact sheets
that follow provide in-depth information on how,
when, and where to use these actions and additional
resources for residents.
Building action Yard action
Intervention action City permit requiredDNR permit requiredWatershed permit requiredGroundwater oodingSurface water oodingSanitary back owRelative
Cost Before oodDuring oodAfter oodReduceexposureReduces vulnerabilitySump pump x x x
Low x x
Sanitary back ow prevention x x Medium x x
Dry oodproo ng x x x
Med-High x x
Sandbags x Low x x
Wet oodproo ng x x x
High x x x
Basement and low-level area pumping x x x
Low x
Rain gardens and landscape changes1,2 x*x*x Medium x x
Shoreline restoration3 x*x x High x x
Backyard element siting4 x*x x Low x x
Actions for Flood Resilient Homes:
Actions and Programs Overview
Reduces vulnerabilityReduces exposure
The extent to which property,
homes, buildings, infrastructure,
and other assets come into
contact with ood water.
The extent to which an
exposed asset is able to
resist ood-related damage.
1Rain gardens may require a City permit if grading over 10 cubic yards
2Rain gardens may require a permit from the watershed district. To learn more about your
watershed visit: http://www.ninemilecreek.org or http://www.minnehahacreek.org
3DNR permit may be required, visit https://www.dnr.state.mn.us/rys/index.html for more info.
4Setbacks and structure count may apply, contact the City Planning Department for more info.
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Actions can reduce exposure or vulnerability
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Actions can reduce exposure or vulnerabilityHome retro tting and
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Home retro tting and
ood prevention devices
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ood prevention devices
The table below provides a quick overview of some
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The table below provides a quick overview of some
common actions you can take to create more ood
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common actions you can take to create more ood
resilient buildings and landscapes. The fact sheets
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resilient buildings and landscapes. The fact sheets
that follow provide in-depth information on how,
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that follow provide in-depth information on how,
when, and where to use these actions and additional
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when, and where to use these actions and additional
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TSurface water D
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Relative
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TexposureReduces D
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TReduces Low
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Reduces exposure
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Reduces exposure
The extent to which property,
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The extent to which property,
homes, buildings, infrastructure,
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homes, buildings, infrastructure,
and other assets come into
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and other assets come into
contact with ood water.
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contact with ood water.
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Take Action!
The following factsheets describe
actions that can protect your home
from damage related to ooding. Not
all actions will bene t your home; a
proper home drainage assessment can
help you understand which measures
will be best for your situation. Many
measures will require assistance
from professional contractors and
may require city permits. Please
refer to each factsheet for additional
information.
Flood Insurance
The City of Edina participates in the National Flood
Insurance Program which enables anyone residing in
Edina to purchase a National Flood Insurance Program
ood insurance policy.
Your homeowners or renters insurance agent may also
be able to help you purchase ood insurance. A list of
participating providers can be found here: https://www.
oodsmart.gov/ nd
Home Drainage Assessment
Improper drainage can cause water damage during even minor rain or
snow melt events. Whether you’re an owner or a renter, the “Home
Drainage Basics” factsheet can help you assess problem areas where
you live.
Adopt-A-Drain
By committing to keep drains clear of trash, leaves, grass,
snow, and ice you can help prevent ooding—not to
mention keeping Minnesota’s lakes, streams, and rivers free
of pollutants. For greater impact, consider working with a
friend or your neighbors to adopt multiple drains.
More information on the Adopt-A-Drain program can be found
by visiting: https://www.adopt-a-drain.org/
Actions for Flood Resilient Homes:
Programs and Assessments
Described below are a few ways to take action in the ght against ooding. Consider ood insurance and a home drainage
assessment to protect your home; consider adopting a drain to protect the environment and your community.
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
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Take Action!
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Take Action!
The following factsheets describe
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The following factsheets describe
actions that can protect your home
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actions that can protect your home
from damage related to ooding. Not
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from damage related to ooding. Not
all actions will bene t your home; a
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all actions will bene t your home; a
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The City of Edina participates in the National Flood
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The City of Edina participates in the National Flood
Insurance Program which enables anyone residing in
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Insurance Program which enables anyone residing in
Edina to purchase a National Flood Insurance Program
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Edina to purchase a National Flood Insurance Program
Adopt-A-Drain
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Adopt-A-Drain
By committing to keep drains clear of trash, leaves, grass,
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By committing to keep drains clear of trash, leaves, grass,
snow, and ice you can help prevent ooding—not to
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snow, and ice you can help prevent ooding—not to
mention keeping Minnesota’s lakes, streams, and rivers free
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mention keeping Minnesota’s lakes, streams, and rivers free
of pollutants. For greater impact, consider working with a
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of pollutants. For greater impact, consider working with a
friend or your neighbors to adopt multiple drains.
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friend or your neighbors to adopt multiple drains.
More information on the Adopt-A-Drain program can be found
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More information on the Adopt-A-Drain program can be found
by visiting: https://www.adopt-a-drain.org/
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by visiting: https://www.adopt-a-drain.org/
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Actions for Flood Resilient Homes:
Flood Insurance
According to the Federal Emergency Management Agency (FEMA), ooding is the most common natural disaster in the United
States and the consequences can be costly. Even 1 inch of water can cause $25,000 damage to your home.
While homeowner’s insurance policies do not typically cover ood damage, the good news is that you can purchase separate
protection. Because the City of Edina participates in the National Flood Insurance Program (NFIP), all of its residents are eligible to
purchase ood insurance.
Who needs ood insurance?
Under federal law, if your home is within, or touches, a high-risk ood area and you have a mortgage on the property, you will be
required to purchase ood insurance. Homes considered to be at high risk are those located within the 100-year oodplain—areas
where there is a 1% annual risk of water rising above the base ood elevation.
If you live near an area of past ooding you should consider purchasing ood insurance. Even if you don’t live in or near a high-
risk area, ood insurance can be a wise investment. In fact, more than 20 percent of ood insurance claims come from properties
outside of high-risk ood zones. And, compared to the cost of paying back a disaster loan, ood insurance is a bargain. The
Minnesota Commerce Department calculates that the average payment on a $50,000 disaster loan is $240 per month ($2,880) for
30 years, while a $100,000 ood insurance premium is about $400 per year ($33 per month).
Flood insurance is not limited to homeowners; it is also available to renters and owners of non-residential buildings.
How do I nd out about my risk of ooding?
To learn about your speci c risk of ooding, go to the City of
Edina’s interactive ood risk map or visit FEMA’s Flood Map
Service Area (https://msc.fema.gov/portal/home). is required
to drain sump water to the storm sewer.
How do I buy insurance?
You can start by contacting the agent who provides your
auto, homeowner’s, or renter’s insurance. He or she may be
able to help you purchase ood insurance. If your insurance
agent does not sell ood insurance, you can contact the NFIP
Help Center at 800-427-4661.
What does ood insurance cover?
You can purchase separate coverage for your home and its
contents; both are recommended for the best protection.
Make sure your policy contains a comprehensive list of items
covered.
Almost all walled and roofed buildings above ground can be
covered. Coverage available for basements typically includes
foundation elements (including posts or other support
systems), utility connections, and necessary mechanical
equipment (e.g., furnace, hot water heater, clothes washer
and dryer, food freezer, air conditioner, electrical junction).
Items typically found in nished basements—paneling,
carpeting, furniture—are not covered.
You must normally wait 30 days after you’ve paid your
premium before your policy will be e ective.
Other considerations
Losses from sewer backup are not covered by ood
insurance unless the backup occurs as a result of surface
water ooding. You may want to consider purchasing a rider
on your homeowner’s policy to protect you from sewer
backups not related to ooding.
COST: $150-$12,0001
Costs are variable based on whether the location of the
structure being insured above or below the base ood elevation,
if the policy holder is a home-owner or renter, and many other
factors. Due to the numerous variables, the best way to learn
what your costs would be is to contact multiple providers and
utilize the resources at the bottom of this page.
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
1According to the Minnesota Department of Commerce, the average cost for a ood insurance policy is $500 per year. In low-to-moderate risk areas insurance
can cost just over $100 per year. A Renters’ policy can range from $150-900 according to the Policygenius website:
https://www.policygenius.com/renters-insurance/what-renters-need-to-know-about- ood-insurance/
Other Resources: FEMA National Flood Insurance Program: www. oodsmart.gov
Minnesota Department of Commerce Flood Insurance Basics: https://mn.gov/commerce/consumers/your-home/protect/other/ oods/basics.jsp
Minnesota Department of Natural Resources Flood Insurance FAQs: https:// les.dnr.state.mn.us/publications/waters/ oodplain_management_fact_sheet_8.pdf
Before ood action During ood action After ood action
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purchase ood insurance.
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purchase ood insurance.
Who needs ood insurance?
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Who needs ood insurance?
Under federal law, if your home is within, or touches, a high-risk ood area and you have a mortgage on the property, you will be D
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Under federal law, if your home is within, or touches, a high-risk ood area and you have a mortgage on the property, you will be
required to purchase ood insurance. Homes considered to be at high risk are those located within the 100-year oodplain—areas D
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required to purchase ood insurance. Homes considered to be at high risk are those located within the 100-year oodplain—areas
where there is a 1% annual risk of water rising above the base ood elevation.D
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where there is a 1% annual risk of water rising above the base ood elevation.
If you live near an area of past ooding you should consider purchasing ood insurance. Even if you don’t live in or near a high-D
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If you live near an area of past ooding you should consider purchasing ood insurance. Even if you don’t live in or near a high-
risk area, ood insurance can be a wise investment. In fact, more than 20 percent of ood insurance claims come from properties
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risk area, ood insurance can be a wise investment. In fact, more than 20 percent of ood insurance claims come from properties
outside of high-risk ood zones. And, compared to the cost of paying back a disaster loan, ood insurance is a bargain. The
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outside of high-risk ood zones. And, compared to the cost of paying back a disaster loan, ood insurance is a bargain. The
Minnesota Commerce Department calculates that the average payment on a $50,000 disaster loan is $240 per month ($2,880) for
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Minnesota Commerce Department calculates that the average payment on a $50,000 disaster loan is $240 per month ($2,880) for
30 years, while a $100,000 ood insurance premium is about $400 per year ($33 per month).
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30 years, while a $100,000 ood insurance premium is about $400 per year ($33 per month).
Flood insurance is not limited to homeowners; it is also available to renters and owners of non-residential buildings.
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Flood insurance is not limited to homeowners; it is also available to renters and owners of non-residential buildings.
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How do I nd out about my risk of ooding?
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How do I nd out about my risk of ooding?
To learn about your speci c risk of ooding, go to the City of
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To learn about your speci c risk of ooding, go to the City of
What does ood insurance cover?
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What does ood insurance cover?
You can purchase separate coverage for your home and its
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You can purchase separate coverage for your home and its
contents; both are recommended for the best protection.
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contents; both are recommended for the best protection.
Make sure your policy contains a comprehensive list of items
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Make sure your policy contains a comprehensive list of items
covered.
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covered.
Almost all walled and roofed buildings above ground can be
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Almost all walled and roofed buildings above ground can be
covered. Coverage available for basements typically includes
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covered. Coverage available for basements typically includes
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foundation elements (including posts or other support
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foundation elements (including posts or other support
systems), utility connections, and necessary mechanical
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systems), utility connections, and necessary mechanical
equipment (e.g., furnace, hot water heater, clothes washer
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equipment (e.g., furnace, hot water heater, clothes washer
and dryer, food freezer, air conditioner, electrical junction).
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and dryer, food freezer, air conditioner, electrical junction).
Items typically found in nished basements—paneling,
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Items typically found in nished basements—paneling,
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During ood action
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During ood action
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Actions for Flood Resilient Homes:
Home Drainage Basics
The graphic below shows common home drainage issues and solutions. Basic measures such as repositioning downspouts, grading
away from your foundation, and seasonal home maintenance routines can help keep your home dry during heavy rainfall events.
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
http://www.ashireporter.org/HomeInspection/Articles/Keeping-Basements-Dry/1048
Turf to native
planting conversion
helps in ltrate stormwater
and prevents ooding.
The conversion can also
be a money and water
saver; native plants often
require less water than
turf lawns.
Clearing stormsewer
drains helps them perform
e ectively. Drains frequently
become clogged with
stormwater debris, or blocked
by snow and ice, which can
cause water to accumulate and
result in an over ow of water
in the road and in lawns.
Sump pump
discharge pipe
locations should follow
the guidance provided
on the Sump Pump
Factsheet, following
similar guidance for
downspout to ensure
water drains away from
the home.
Gutter installation is
the key to directing water
from your roof away from
your home’s foundation. Too
much water falling too close
to your home can cause
soil erosion, foundation
problems, and water in the
basement.
Installing shields can
prevent ooding through
low-level windows. To
protect window wells,
create a gravel reservoir
that allows water to
slowly dissipate into the
ground and install a cover.
Rain gardens
can provide areas for
stormwater in ltration
on your property. See
Rain Garden Factsheet
for details
Proper downspout alignment helps to drain water away from
the home. Make sure the downspout extension is at least 4–6 feet
long and properly positioned to avoid water backup.
Grading away from your home
provides water with a path away
from your home’s foundation,
decreasing the likelihood of ooding.
Inset images courtesy of: http://www.ashireporter.org/HomeInspection/Articles/Keeping-Basements-Dry/1048
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helps them perform
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in the road and in lawns.
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Rain gardens
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can provide areas for
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stormwater in ltration
on your property.
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on your property.
Rain Garden Factsheet
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Rain Garden Factsheet
for details
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for details
helps to drain water away from
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helps to drain water away from
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the home. Make sure the downspout extension is at least 4–6 feet
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Actions for Flood Resilient Homes:
Sump Pumps
What is a sump pump?
A sump pump is a small pump installed in the lowest part of your
basement. Its purpose is to collect subsurface water from the ground
near your home’s foundation and pump it out to your yard to keep your
basement dry.
Who needs a sump pump?
According to the American Society of Home Inspectors, 60% of homes
in the United States have wet basements. If yours is one of them—or
if one of the conditions below applies—you should consider installing a
sump pump.
• Your basement has ooded
• You live in a low-lying area (see the interactive ood risk map )
• You have a nished basement where you store valuables
(including appliances such as a washer/dryer)
• You live in an area that receives signi cant amounts of rain or
experiences rapid snow melt
How does a sump pump work?
The sump pump usually stands in a “sump
pit,” which is a hole about 2 feet deep
and 18 inches wide. Water from the soil
around your home’s foundation ows into
the sump pit through drains. Once that
water reaches a certain level in the pit a
pressure sensor or oat activator (similar
to the one in your toilet), turns the
pump on. The activated pump moves the
water out of the pit through a pipe that
should empty onto the ground at least
20 feet away from your home. In the
City of Edina a utility connection permit
is required to drain sump water to the
storm sewer.
Reduces vulnerability
Reduces exposure
COST: $400 (median MN)1
Sump tank
Sump pump
3/4” Clear gravel
Foundation drain tile pipe
Interior drainage system
2” Discharge pipe
Check valve
FINISHED FLOOR ELEVATION
BASEMENT FLOOR
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
1According to improvenet.com (2020) for cost of replacement sump pump installation. May be substantially higher for new pumps, depending on type of pump/ ooring and location.
Groundwater
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in the United States have wet basements. If yours is one of them—or
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sump pump.
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interactive ood risk map
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(including appliances such as a washer/dryer)
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2” Discharge pipe
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Sump pump standards can be found at: https://www.edinamn.gov/DocumentCenter/View/397/Sump-Pump-Discharge-Connection-Policy-PDF
Information on utility connection permits can be found at: https://epermits2.logis.org/home.aspx?city=ed
Sump Drain Detail: https://www.edinamn.gov/DocumentCenter/View/848/310---Sump-Drain-PDF
Sump Drain Connection Detail: https://www.edinamn.gov/DocumentCenter/View/849/311---Sump-Drain-Service-Connection-PDFInstalling sump pump require a permit: https://www.edinamn.gov/209/Building-Permits-Resources
Actions for Flood Resilient Homes:
Sump Pumps
Connecting your sump pump
to City of Edina storm sewers:
• The pipe exiting the house should have an air gap and
drain to an area that slopes away from your home’s
foundation. Direct the drainage away from your home
toward green areas that in ltrate water or toward public
drainage paths.
• Sump drain lines can connect your sump pump directly
to the storm sewer. This is best done by a licensed
professional and requires a permit from the City of Edina.
Other Considerations
• Gutters can signi cantly a ect the water that gets into your basement. Make sure your gutters are well maintained and large
enough to handle heavy rains. Downspouts should be directed away from the home. Similarly, make sure that the land next to
your home is properly graded—directing water away from the foundation.
• Sump pumps should be checked regularly, particularly in early spring and when heavy rains are forecast. To test your pump,
pour a bucket of water into the pit to make sure it starts automatically and that the water pumps out quickly.
• Pump maintenance should include removing the pump from the pit and cleaning the grate on the bottom. You should also
make sure that if you are using a discharge pipe, the air gap is clear. The air gap is located outside your home, where the sump
pump’s internal discharge line exits the basement and connects to the external discharge line. Its purpose is to provide an
outlet for ows in the event there is a problem with the discharge line or the stormwater system.
• A standard 15-amp, 110-volt, three-pronged grounded electrical outlet can handle a sump pump. The outlet should be an
isolated line, with no other connections between the breaker and the outlet. Because the pump is located near water you may
want to plug it into a working ground fault circuit interrupter (GFCI). However, keep in mind that lightening has been known
to trigger GFCIs and could shut o power to your pump during a heavy rainstorm. Make certain to check on the pump during
the storm so you can reset the GFCI if necessary.
• Consider replacing your sump pump every 10 years.
Make sure your sump pump is ready for whatever water comes its way …
Sump pumps often come with water-level or ood alarms to alert you if the pump fails. Some can even call your cell phone
or notify your alarm company. To minimize the risk of ooding, test your sump pump periodically to make sure it is in good
operating condition. Your user’s manual should specify when and how to test your pump. You can also consider investing
in a backup pump to operate if the primary pump fails or becomes overwhelmed with water from a large storm. Similarly,
because sump pumps operate on electricity, they are vulnerable to power outages. Pumps with backup battery power are
available, or a generator can be used.
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your home is properly graded—directing water away from the foundation.
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your home is properly graded—directing water away from the foundation.
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Pump maintenance should include removing the pump from the pit and cleaning the grate on the bottom. You should also D
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Pump maintenance should include removing the pump from the pit and cleaning the grate on the bottom. You should also
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make sure that if you are using a discharge pipe, the air gap is clear. The air gap is located outside your home, where the sump
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pump’s internal discharge line exits the basement and connects to the external discharge line. Its purpose is to provide an
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outlet for ows in the event there is a problem with the discharge line or the stormwater system.
A standard 15-amp, 110-volt, three-pronged grounded electrical outlet can handle a sump pump. The outlet should be an
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A standard 15-amp, 110-volt, three-pronged grounded electrical outlet can handle a sump pump. The outlet should be an
isolated line, with no other connections between the breaker and the outlet. Because the pump is located near water you may
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isolated line, with no other connections between the breaker and the outlet. Because the pump is located near water you may
want to plug it into a working ground fault circuit interrupter (GFCI). However, keep in mind that lightening has been known
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want to plug it into a working ground fault circuit interrupter (GFCI). However, keep in mind that lightening has been known
to trigger GFCIs and could shut o power to your pump during a heavy rainstorm. Make certain to check on the pump during
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to trigger GFCIs and could shut o power to your pump during a heavy rainstorm. Make certain to check on the pump during
the storm so you can reset the GFCI if necessary.
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the storm so you can reset the GFCI if necessary.
Consider replacing your sump pump every 10 years.
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Consider replacing your sump pump every 10 years.
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
1According to HomeAdvisor (2020). Costs to install a back ow preventer (including device) depend on the size and type of system. Note that many insurance companies o er
discounts to homeowners who install sanitary back ow prevention devices.
What is a sanitary back ow prevention device/
back ow valve?
A sanitary back ow prevention device is a valve attached to your
plumbing system. It is designed to prevent over ow waste water
from the city’s sewer system from backing up into your home.
Who needs a sanitary back ow prevention device?
Because sanitary back ow prevention devices can prevent the
signi cant damage caused by sewer backup, the city of Edina
recommends them for all homes. If you have a newer home a
valve may have been installed during construction. Back ow valves
are usually located in the oor; if you have a sump pump the valve
is likely to be close by.
Note that many insurance companies o er discounts to homeowners
who install sanitary back ow prevention devices. The city recommends
that back ow prevention devices be installed by a licensed plumber. A
permit is required for this installation.
How do sanitary back ow
prevention devices work?
A back ow valve has a ap with small
oaters on both sides that allow the
ap to open and close. Under normal
conditions, the ap is open—allowing
water from your home to ow into the
main sewer system. However, if a large
storm or snow melt overwhelms the
sewer system, causing water or sewage to
back ow toward the house, the oaters
will close the ap, e ectively shutting your
home o from the street sewer system
(see detail above). Once the street sewer
system has chance to drain and return
to normal functioning, the ap opens
again to discharge waste water. Due to
the potential for clogging, occasional
inspection of the device is needed.
Reduces vulnerability
Reduces exposure
COST: $135-$10001
Backfl ow preventer location Sewer lateral
Sewer main
BASEMENT Water level
House sanitary sewer line
Sanitary back ow
prevention device detail
(Image Credit: Mainline
Back ow Products)
Sanitary back ow prevention devices overview
Actions for Flood Resilient Homes:
Sanitary Back ow Prevention Devices
Before ood action During ood action After ood action
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Who needs a sanitary back ow prevention device?
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signi cant damage caused by sewer backup, the city of Edina
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recommends them for all homes. If you have a newer home a
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valve may have been installed during construction. Back ow valves
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are usually located in the oor; if you have a sump pump the valve
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is likely to be close by.
Note that many insurance companies o er discounts to homeowners
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Note that many insurance companies o er discounts to homeowners
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who install sanitary back ow prevention devices. The city recommends
that back ow prevention devices be installed by a licensed plumber. A
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that back ow prevention devices be installed by a licensed plumber. A
permit is required for this installation.
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permit is required for this installation.
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Actions for Flood Resilient Homes:
Sanitary Back ow Prevention Devices
Make sure you’re ready for sewer backups …
Back ow prevention devices can function automatically or be operated manually. To protect your home, the valve must be
closed during overload periods—which will vary with the size of the storm, but typically last from 2 to 6 hours. Be aware that
during the time the valve is closed you will not be able to use your plumbing.
Other Considerations
• You should have your back ow prevention
device cleaned and checked annually, preferably
by the licensed plumber that installed it.
• To avoid back ow in your home plumbing
system, keep your plumbing free of materials
such as diapers, sanitary napkins, and cigarette
butts.
• Backwater from a public sewer system is
hazardous to your health. If sewer water enters
your home you should hire a licensed and
trained professional cleaning service
(Top) Image of sewer backup in bathroom, courtesy of https://
blueskyplumbing .com/wp-content/uploads/2016/10/sewer-
backup-in-bathroom.jpg
(Right) Sanitary back ow prevention device install, image
courtesy of https://www. ickr.com/photos/69302634@
N02/16327005228/in/photostream/
Sanitary back ow preventer installation
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such as diapers, sanitary napkins, and cigarette
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hazardous to your health. If sewer water enters
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your home you should hire a licensed and
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trained professional cleaning service
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
1The cost of dry oodproo ng varies depending on the building size, depth of required protection, types of material used, and number of openings. Examples of general cost estimates can be found in FEMA publications,
Homeowner’s Guide to Retro tting: Six Ways to Protect Your House from Flooding and Engineering Principles and Practices of Retro tting Floodprone Residential Structures.
What is dry oodproo ng?
Dry oodproo ng describes a range of strategies to seal the
exterior of a building from ood waters.
Who should use dry oodproo ng?
Dry oodproo ng is only viable for buildings that are structurally
sound in areas with low-velocity, relatively shallow ooding (below
3 feet). It is most appropriate for slab-on-grade buildings with
concrete or solid masonry walls. Due to risk of structural failure
from excessive ood forces, dry oodproo ng is not advised for
homes with basements or homes comprising weaker construction
materials (e.g...., wood frame with siding).
Note that dry oodproo ng residential structures will not reduce ood insurance premiums.
What are dry oodproo ng
methods?
• Temporary installation of waterproof
membranes: Heavy plastic sheeting or
a waterproof membrane along a wall’s
exterior can be e ective in preventing
water from entering the home.
• Use of sealants: Waterproof sealants
can be applied to building walls,
structural joints, and openings for utility
lines. Cement and asphalt-based coatings
are e ective, but can drastically change
the appearance of the home and may
be susceptible to puncturing. Clear
coatings (e.g.., epoxies or polyurethanes)
can be applied to exterior walls without
changing appearance but tend to be less
e ective.
(continued on next page)
Reduces exposure
Reduces vulnerability
COST: VARIES1
Actions for Flood Resilient Homes:
Dry Floodproo ng
(Above) “A way to seal an existing brick-faced wall is to add an additional layer of brick with
a seal in between. Please note that weep holes (drainage) and wick drains are moved up to
prevent moisture from getting inside the walls.” Images and descriptions provided by FEMA
P-312, Homeowner’s Guide to Retro tting 3rd Edition (2014)
(Left) Example of exterior application of asphalt membrane
(courtesy of https://staydrywaterproo ng.com/)
(Right) an interior application of a ber reinforced polymer
wrap, image provided by FEMA P-312, Homeowner’s Guide
to Retro tting 3rd Edition (2014)
Before ood action During ood action After ood action
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Dry oodproo ng is only viable for buildings that are structurally
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3 feet). It is most appropriate for slab-on-grade buildings with
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from excessive ood forces, dry oodproo ng is not advised for
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materials (e.g...., wood frame with siding).
Note that dry oodproo ng residential structures will not reduce ood insurance premiums.
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Note that dry oodproo ng residential structures will not reduce ood insurance premiums.
What are dry oodproo ng
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What are dry oodproo ng
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Before ood action
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During ood action
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During ood action
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Other Considerations
• The Federal Emergency Management Agency recommends that dry oodproo ng should be designed by licensed professionals.
Failure to anticipate hydrostatic forces may result in extensive damage.
• Placement of ood shields or waterproof membranes is not feasible during ash oods or when warning times are short.
• Ongoing maintenance is required.
• Flood shields and sealants may not be aesthetically pleasing.
• Dry oodproo ng does not mitigate the potential impact of high-velocity ood ow, wave action, erosion, or debris.
Actions for Flood Resilient Homes:
Dry Floodproo ng
• Addressing closures: Openings in the walls need
to be either temporarily or permanently sealed
shut. For example, low window openings at ground
level can either have a pre-sized closure tted over
their surface or a low wall constructed around the
opening. Similarly, all or part of a low window could
be replaced with brick or glass block.
• Using ood shields: Temporary watertight
shields can be placed over windows or doors in
anticipation of ooding. Most residential shields can
be stored in the home and installed when needed
by bolting them into place or securing them in
permanently installed brackets or tracks.
• Addressing interior drainage: A good interior
drainage system to collect leaking water (e.g., a
sump pump with an emergency power source) is
an important component of a dry oodproo ng
system. Sanitary back ow prevention is also
recommended.
(Above) Metal shields installed with bolts or permanently installed
tracks. image courtesy of:www.ps oodbarriers.com/wp-content/uploads/
sites/4/2016/09/Flood-Plank-21.jpg
(Left) Low window raised and original opening lled with brick, image provided
by FEMA P-312, Homeowner’s Guide to Retro tting 3rd Edition (2014)
What are dry oodproo ng methods? (continued)D
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Ongoing maintenance is required.
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Ongoing maintenance is required.
Flood shields and sealants may not be aesthetically pleasing.
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Flood shields and sealants may not be aesthetically pleasing.
Dry oodproo ng does not mitigate the potential impact of high-velocity ood ow, wave action, erosion, or debris.D
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Dry oodproo ng does not mitigate the potential impact of high-velocity ood ow, wave action, erosion, or debris.D
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Addressing closures
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Addressing closures: Openings in the walls need
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: Openings in the walls need
to be either temporarily or permanently sealed
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to be either temporarily or permanently sealed
shut. For example, low window openings at ground
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shut. For example, low window openings at ground
level can either have a pre-sized closure tted over
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level can either have a pre-sized closure tted over
their surface or a low wall constructed around the
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their surface or a low wall constructed around the
opening. Similarly, all or part of a low window could
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opening. Similarly, all or part of a low window could
be replaced with brick or glass block.
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be replaced with brick or glass block.
Temporary watertight
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Temporary watertight
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shields can be placed over windows or doors in
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shields can be placed over windows or doors in
anticipation of ooding. Most residential shields can
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anticipation of ooding. Most residential shields can
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What are dry oodproo ng methods?
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
1Costs vary depending on the size of the area to be protected.
Under severe ood conditions, it may be necessary to build a sandbag dike to protect your home from water damage. Sandbags
that are properly lled and placed can successfully divert water—moving it around buildings rather than allowing it to ow through
them. The information below outlines the materials and steps necessary to build a sandbag dike.
Sandbag materials
Sandbags themselves are generally made of treated
burlap or woven polypropylene and measure
approximately 24 inches by 14 inches. A sandy
soil is best for lling sandbags, but other available
materials (silt, clay, gravels, or a mixture) may be
used. Sandbags can be found online and in hardware
stores. Some local sources of sand or gravel include:
• Bjorklund & Companies, 763-444-9301
• D-Rock Center, 651-639-0446
• Hage Concrete Works, 612-861-4243
• Hedberg Supply, Landscape & Masonry,
763-545-4400
• Marshall Concrete Products, 612-789-4303
• North Star Packaging, 952-249-0661
• Plaisted Companies, 763-441-1100
Filling a sandbag
Filling and deploying sandbags is usually a three-
person job: one person to hold the bag open, one
person to shovel sand, and a third person to position
the bag. The use of gloves is advised, as well as safety
goggles.
Bags should be lled about one-half to two-thirds full
and will weigh approximately 35-40 pounds. Untied
bags are recommended for most applications.
Reduces exposure
Reduces vulnerability
COST: VARIES1
Actions for Flood Resilient Homes:
Sandbags
Placing sandbags
Remove any debris from the area before placing sandbags. To
avoid placing stress on walls, you should leave at least 8 feet
between the dike and the building you want to protect.
Place the rst layer of bags lengthwise, parallel to the
direction of the water ow. The bags should be “lapped” so
that the lled portion of one bag lies on the un lled portion
of the next. The untied end should be facing downstream.
Similar to brick laying, o set adjacent rows or layers by one-
half bag length to eliminate continuous joints. To form a tight
seal, walk on the bags as they are placed and continue walking
on them as succeeding layers are added. Because bags may
remain untied, make certain to fold under all loose ends.
image: https://www.disaster.qld.gov.au/dmp/sandbagging/Pages/default.aspx
Before ood action During ood action After ood action
How to make a request
• During regular business hours, requests can be made by
calling in to the Public Works utility line, 952-826-0375.
• On weekends, requests can be made by calling in to the
non-emergency police to get routed to the on-call person.
• Leave name, address, and the quantity of sandbags desired.
If you’re unsure, describe the size of the area and Public
Works can help to determine how many are needed.
City provided sandbags:
Public Works delivers sand bags to residents when requested,
and will leave sand bag pallets at the end of the property
driveway. Requests are typically ful lled within 24 hours.
Residents must place the sand bags themselves – Public Works
sta does not place sandbags.
When sandbags are no longer needed, residents may keep
the sandbags or place them back on the pallet and call Public
Works for pick-up.
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Public Works delivers sand bags to residents when requested,
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Public Works delivers sand bags to residents when requested,
and will leave sand bag pallets at the end of the property
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and will leave sand bag pallets at the end of the property
driveway. Requests are typically ful lled within 24 hours. D
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driveway. Requests are typically ful lled within 24 hours.
Residents must place the sand bags themselves – Public Works D
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Residents must place the sand bags themselves – Public Works
sta does not place sandbags.D
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sta does not place sandbags.
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Sandbags themselves are generally made of treated
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Sandbags themselves are generally made of treated
Placing sandbags
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Placing sandbags
Remove any debris from the area before placing sandbags. To
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Remove any debris from the area before placing sandbags. To
avoid placing stress on walls, you should leave at least 8 feet
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avoid placing stress on walls, you should leave at least 8 feet
between the dike and the building you want to protect.
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between the dike and the building you want to protect.
Place the rst layer of bags lengthwise, parallel to the
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Place the rst layer of bags lengthwise, parallel to the
direction of the water ow. The bags should be “lapped” so
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direction of the water ow. The bags should be “lapped” so
that the lled portion of one bag lies on the un lled portion
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that the lled portion of one bag lies on the un lled portion
of the next. The untied end should be facing downstream.
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of the next. The untied end should be facing downstream.
Similar to brick laying, o set adjacent rows or layers by one-
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Similar to brick laying, o set adjacent rows or layers by one-
half bag length to eliminate continuous joints. To form a tight
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half bag length to eliminate continuous joints. To form a tight
seal, walk on the bags as they are placed and continue walking
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seal, walk on the bags as they are placed and continue walking
on them as succeeding layers are added. Because bags may
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on them as succeeding layers are added. Because bags may
remain untied, make certain to fold under all loose ends.
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remain untied, make certain to fold under all loose ends.
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Before ood action
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Before ood action
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During ood action
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During ood action
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the sandbags or place them back on the pallet and call Public
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the sandbags or place them back on the pallet and call Public
Works for pick-up.
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Works for pick-up.
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Other Considerations
Sandbags can become contaminated with bacteria and other pathogens from polluted ood waters. The sand from these bags
should never be used in children’s sandboxes.
Full sandbags may be stored for short periods of time and reused for same-season ood ghting. However, prolonged storage can
lead to mold. According to the Minnesota Pollution Control Agency, the safest place to dispose of full sandbags is a sanitary land ll.
Sandbags may also be disposed in a demolition land ll. Be aware, however, that not all land lls will accept sandbags, so call rst.
Actions for Flood Resilient Homes:
Sandbags
How high and how wide should my dike be?
The U.S. Army Corps of Engineers recommends that your dike should
have a base three times wider than its height, although a ratio of 2:1 is
also commonly recommended. A triangular pyramid shape should be
used for a dike that is higher than 1 foot. For heights less than a foot,
support the wall of sandbags every 5 feet with clusters of bags; this will
stabilize the structure.
How many bags will I need?
The North Dakota State Extension Service o ers the following
estimates for the number of sandbags needed per 100 linear feet of
dike.
Dike Height 3:1 base to height 2:1 base to height
2 foot 2,100 bags 1,700 bags
3 foot 4,500 bags 3,000 bags
4 foot 7,800 bags 5,500 bags
5 foot 12,000 bags 9,000 bags
Sealing the dike
To improve water tightness, your nished dike should be sealed with
a sheet of plastic at least 6 mils thick. First, spread a loose layer of soil
or sand about 1 inch deep and 1 foot wide along the bottom of the
dike on the water side. Then, lay the plastic sheeting so the upper
edge extends over the top of the dike and the bottom extends 1 foot
beyond the bottom of the dike (over the layer of soil and sand). Be
careful not to stretch the plastic too tight; this could lead to puncturing.
Finally, put a row of sandbags on the bottom and top edges of the
plastic to form a watertight seal and hold it in place. Be careful to avoid
puncturing the plastic by walking on it.
Sandbag alternatives
Alternatives to sandbags include “sandless” sandbags and Hydrabarriers, which can be purchased online or at some hardware
stores. The sandless bags are made of an absorbent polymer that swells on contact with water—basically self-in ating the bags
to form a water barrier. The Hydrabarrier is a tube (available in di erent sizes) that you ll with water to form a barrier. The
advantage of these systems is that they are lighter weight, reusable, and do not pose a disposal problem. The disadvantage is
that these systems can be expensive to purchase
image: http://goldenlake.co/
Even when properly installed, water can leak and rain may fall inside the
barrier. Be prepared with a pump to remove water from inside the barrier.
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lead to mold. According to the Minnesota Pollution Control Agency, the safest place to dispose of full sandbags is a sanitary land ll.
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lead to mold. According to the Minnesota Pollution Control Agency, the safest place to dispose of full sandbags is a sanitary land ll.
Sandbags may also be disposed in a demolition land ll. Be aware, however, that not all land lls will accept sandbags, so call rst.
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Sandbags may also be disposed in a demolition land ll. Be aware, however, that not all land lls will accept sandbags, so call rst.
How high and how wide should my dike be?D
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How high and how wide should my dike be?
The U.S. Army Corps of Engineers recommends that your dike should D
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The U.S. Army Corps of Engineers recommends that your dike should
have a base three times wider than its height, although a ratio of 2:1 is D
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have a base three times wider than its height, although a ratio of 2:1 is
also commonly recommended. A triangular pyramid shape should be
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also commonly recommended. A triangular pyramid shape should be
used for a dike that is higher than 1 foot. For heights less than a foot,
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used for a dike that is higher than 1 foot. For heights less than a foot,
support the wall of sandbags every 5 feet with clusters of bags; this will
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support the wall of sandbags every 5 feet with clusters of bags; this will
How many bags will I need?
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How many bags will I need?
The North Dakota State Extension Service o ers the following
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The North Dakota State Extension Service o ers the following
estimates for the number of sandbags needed per 100 linear feet of
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estimates for the number of sandbags needed per 100 linear feet of
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2:1 base to height
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2:1 base to height
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
1Costs of wet oodproo ng vary with the methods adopted. Major costs are associated with rearrangement of utility systems, installation of
ood vents, and replacement of materials that are not resistant to oods. Note that wet oodproo ng residential structures will not
reduce ood insurance premium rates on residential structures.
What is wet oodproo ng?
Wet oodproo ng refers to a range of
strategies used to prevent or provide
resistance to ood damage—while allowing
water into the uninhabited portion of
a building (e.g., un nished basement,
crawlspace, garage). Allowing oodwater
to enter the enclosed areas of a home
equalizes pressure, which can prevent
structural damage. Successful wetproo ng
involves (1) ensuring that oodwaters inside
the home rise and fall at the same rate as
oodwaters outside the home, (2) reducing
damage through the use of ood-resistant
materials, (3) protecting service equipment
inside and outside of the home, and (4)
relocating any high-value items stored below
the designed ood elevation (DFE).
• Elevate appliances and utilities or install
barriers: Items that should be elevated or protected
with a barrier include your furnace and air-conditioning
unit, outside air-conditioner compressor, washer and
dryer, water heater, freezer, and electrical outlets and
switches. You can also relocate these to a place in your
home that is higher than the DFE (e.g., an attic), or build
a small addition that would serve as a utility room and
as storage for valuable furnishings during a ood.
• Use ood-resistant materials: The Federal
Emergency Management Agency (FEMA) publishes
ood-resistant classi cations for ooring, wall, and
ceiling materials, as well as the adhesives used to install
them (Technical Bulletin 2-08). Carpeting, paneling, and
gypsum wallboard can all be replaced with materials that
would require cleaning rather than replacement.A table
on the following page lists materials that are acceptable
in wet oodproo ng home projects.
(continued on next page)
Actions for Flood Resilient Homes:
Wet Floodproo ng
Reduces exposure
Reduces vulnerability
COST: VARIES1
Before ood action During ood action After ood action
Wet oodproo ng techniques for a house. Image from FEMA P-259 (Figure -10)
https://www.restoration1greaterminneapolis.com/how-to-deal-with-a- ooded-basement
What are wet oodproo ng methods?
An advantage of wet oodproo ng is that it is exible; it can be done in stages—many of them relatively inexpensively.
A good time to employ wet oodproo ng strategies is when you remodel your home. The following are some wet
oodproo ng methods:
Base fl ood elevation
Who should use wet oodproo ng?
If you are at risk of ooding and cannot elevate your home or build reliable
ood barriers, wet oodproo ng of non-living spaces is an option. It is most
suitable for shallow ooding that inundates uninhabited space. It is not practical
for most slab-on-grade structures that have the living space at or near
ground level. Also, it is not a reasonable approach if the duration of a ood is
expected to be more than one day.
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a building (e.g., un nished basement,
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a building (e.g., un nished basement,
crawlspace, garage). Allowing oodwater
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crawlspace, garage). Allowing oodwater
to enter the enclosed areas of a home D
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to enter the enclosed areas of a home
equalizes pressure, which can prevent D
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equalizes pressure, which can prevent
structural damage. Successful wetproo ng D
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structural damage. Successful wetproo ng
involves (1) ensuring that oodwaters inside D
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involves (1) ensuring that oodwaters inside
the home rise and fall at the same rate as
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the home rise and fall at the same rate as
oodwaters outside the home, (2) reducing
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oodwaters outside the home, (2) reducing
damage through the use of ood-resistant
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damage through the use of ood-resistant
materials, (3) protecting service equipment
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materials, (3) protecting service equipment
inside and outside of the home, and (4)
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inside and outside of the home, and (4)
relocating any high-value items stored below
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relocating any high-value items stored below
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During ood action
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https://www.restoration1greaterminneapolis.com/how-to-deal-with-a- ooded-basement
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https://www.restoration1greaterminneapolis.com/how-to-deal-with-a- ooded-basement
An advantage of wet oodproo ng is that it is exible; it can be done in stages—many of them relatively inexpensively.
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An advantage of wet oodproo ng is that it is exible; it can be done in stages—many of them relatively inexpensively.
A good time to employ wet oodproo ng strategies is when you remodel your home. The following are some wet
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A good time to employ wet oodproo ng strategies is when you remodel your home. The following are some wet
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Other Considerations
• Ongoing maintenance is required to minimize ood
risks.
• Pumping water from a basement too soon after a
ood may lead to structural damage.
• Work on electrical systems, gas systems, or air-
conditioning compressors requires a licensed
contractor, and permits may be required.
Actions for Flood Resilient Homes:
Wet Floodproo ng
What are wet oodproo ng methods? (continued)
Materials that are acceptable in wet oodproo ng home project:
Material Type Acceptable Unacceptable
Structural Flooring Materials • Concrete
• Naturally decay-resistant lumber
• Pressure-treated plywood
• Oriented-strand board (OSB)
Finish Flooring Materials • Clay tile
• Ceramic or porcelain tile
• Terrazzo tile
• Vinyl tile or sheets
• Engineered wood or laminate ooring
• Carpeting
• Wood ooring
Structural Wall and Ceiling Materials • Brick face, concrete, or concrete block
• Cement board / ber-cement board
• Pressure-treated plywood
• Solid, standard structural lumber (2x4)
• Non-paper-faced gypsum board
• Fiberglass insulation
• Paper-faced gypsum board
• OSB
Finish Wall and Ceiling Materials • Glass blocks
• Metal cabinets or doors
• Latex paint
• Wood cabinets and doors
• Non-latex paint
• Particleboard cabinets and doors
• Wallpaper
FEMA P-312, Homeowner’s Guide to Retro tting 3rd Edition (2014)
• Sewage back ow prevention is important; a back ow valve
should be installed.
• Because wet oodproo ng allows your home to ood,
extensive cleanup may be necessary to remove potential
chemical and biological contamination and prevent mold
growth and decay.
• Install ood vents: Flood vents (permanent openings)
allow water into the structure, equalizing interior and
exterior pressures to avoid structural damage.
(Above) “Wall openings must allow oodwaters not only to enter the home, but also
to rise and fall at the same rate as oodwaters outside the home.” Images provided
by FEMA P-312, Homeowner’s Guide to Retro tting 3rd Edition (2014)
(Left) Base ood elevation and location of ood vents. Images provided by FEMA
Technical Bulletin 2, 2008, Openings in Foundation Walls and Walls of
Enclosures.
Base fl ood elevation
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ood may lead to structural damage.
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ood may lead to structural damage.
Work on electrical systems, gas systems, or air-
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conditioning compressors requires a licensed D
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conditioning compressors requires a licensed
contractor, and permits may be required.D
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contractor, and permits may be required.
What are wet oodproo ng methods? (continued)D
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What are wet oodproo ng methods? (continued)
Materials that are acceptable in wet oodproo ng home project:
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Materials that are acceptable in wet oodproo ng home project:
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Material Type
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Material Type Acceptable
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Acceptable
Structural Flooring Materials
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Structural Flooring Materials •
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• Concrete
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Concrete
•
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• Naturally decay-resistant lumber
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Naturally decay-resistant lumber
•
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• Pressure-treated plywood
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Pressure-treated plywood
•
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• Clay tile
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Clay tile
Ceramic or porcelain tile
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Ceramic or porcelain tile
Terrazzo tile
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Terrazzo tile
Vinyl tile or sheets
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Vinyl tile or sheets
•
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•
Brick face, concrete, or concrete block
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Brick face, concrete, or concrete block
Cement board / ber-cement board
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Cement board / ber-cement board
Pressure-treated plywood
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Pressure-treated plywood
Solid, standard structural lumber (2x4)
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Solid, standard structural lumber (2x4)
Non-paper-faced gypsum board
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Non-paper-faced gypsum board
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• Fiberglass insulation
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Fiberglass insulation
•
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• Paper-faced gypsum board
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Paper-faced gypsum board
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• OSB
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OSB
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• Wood cabinets and doors
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Wood cabinets and doors
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• Non-latex paint
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Non-latex paint
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• Particleboard cabinets and doors
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Particleboard cabinets and doors
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• Wallpaper
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Wallpaper
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FEMA P-312, Homeowner’s Guide to Retro tting 3rd Edition (2014)
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FEMA P-312, Homeowner’s Guide to Retro tting 3rd Edition (2014)
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Actions for Flood Resilient Homes:
Pumping Guidance
If dry oodproo ng methods fail during a large storm or you’ve chosen wet oodproo ng, you may end up with a signi cant
amount of water in your basement. Though your impulse may be to remove the water as soon as possible, it’s important
to remember that moving too quickly may cause structural damage to your home. Even though ood waters may have
receded, there is still water in the ground that may be exerting force against your basement walls. If that force is greater
than the force of water inside your basement, the foundation, basement walls, or oors may rupture or crack.
Pumping Procedure—when and how much to pump?
If you need to pump water out of your basement or house, the Federal Emergency Management Agency (FEMA)
recommends taking the following steps to avoid serious damage to your home.
1. Begin pumping only when oodwaters are no longer covering the ground outside.
2. Pump out 1 foot of water, mark the water level, and wait overnight.
3. Check the water level the next day. If the level rose to the previous mark, it is still too early to drain the basement.
4. Wait 24 hours, pump the water down 1 foot, and mark the water level. Check the level the next day.
5. When the water level stops returning to your mark, pump out 2 to 3 feet and wait overnight. Repeat this process.
daily until all of the water is out of the basement.
Safety First!
Remember that water conducts electricity. Before walking into
a ooded basement make certain the power is turned o and
wear heavy rubber boots and rubber gloves that do not leak.
Reduces vulnerability
Reduces exposure
COST: VARIES1
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
1Costs rely on a number of factors—including the amount of water and whether you choose to do the pumping yourself. You can contract with a water-removal service, but you
may have to wait several days for assistance.
After ood action During ood action Before ood action
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Pumping Procedure—when and how much to pump?
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Pumping Procedure—when and how much to pump?
If you need to pump water out of your basement or house, the Federal Emergency Management Agency (FEMA)
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If you need to pump water out of your basement or house, the Federal Emergency Management Agency (FEMA)
recommends taking the following steps to avoid serious damage to your home.
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recommends taking the following steps to avoid serious damage to your home.
1. Begin pumping only when oodwaters are no longer covering the ground outside.
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1. Begin pumping only when oodwaters are no longer covering the ground outside.
3. Check the water level the next day. If the level rose to the previous mark, it is still too early to drain the basement.
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3. Check the water level the next day. If the level rose to the previous mark, it is still too early to drain the basement.
4. Wait 24 hours, pump the water down 1 foot, and mark the water level. Check the level the next day.
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4. Wait 24 hours, pump the water down 1 foot, and mark the water level. Check the level the next day.
5. When the water level stops returning to your mark, pump out 2 to 3 feet and wait overnight. Repeat this process.
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5. When the water level stops returning to your mark, pump out 2 to 3 feet and wait overnight. Repeat this process.
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During ood action
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During ood action
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Actions for Flood Resilient Homes:
Pumping Guidance
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Pumping Procedure—Equipment
A submersible pump is needed to remove water from a
ooded basement. You can rent this type of equipment
from a construction rental store or a hardware store; this
will be less expensive than purchasing professional pumping
equipment. The pump is encased in a waterproof shell with a
sealed electrical cord; it connects to a regular garden hose or
a sump hose. The power source for the pump will depend
on whether or not you have electricity.
If you don’t have electricity you will need to connect to a
generator. Be careful! Do not use gasoline-powered pumps
or generators indoors; these can produce deadly carbon
monoxide exhaust fumes. Note: opening doors and windows
does not provide su cient ventilation. Another option is
a pump that runs on a 12-volt marine or car battery or a
petrol/diesel driven pump.
If you do have power, you can use a heavy-duty extension
cord to run the pump on standard electricity—provided
you have a place to plug it in. If your fuse box isolates your
basement and you are absolutely sure you can disable the
power in the basement, you can use electricity on the
ground oor or higher. No matter what energy source you
use, you will need to be careful to keep the connection
between the extension cord and the pump cord away from
water. You can do this by looping the cords around a ceiling
joist or another heavy object.
Other Considerations
• A second pump should be considered to provide increased capacity and act as a backup.
• Strainers should be used to protect pumps from large debris.
• Use clean, fresh fuel in your pump or generator and make sure you have enough available to act in a ood.
• Be careful around oodwater that may have been contaminated by sewage. Tetanus shots are recommended when cleaning
ooded areas.
Pumping Procedure—Pumping out the water
To pump water, a garden or sump hose should be attached to the tting on the top of the pump. The end of the hose is
then pointed away from the house to drain away to the street or storm sewer If the water is low enough, you can place
the pump in the lowest part of the basement, making sure to wear rubber boots. In the event of very high water, you can
lower the pump into the basement using rope. Once the pump is in place, start the generator, plug the extension cord in,
and turn the pump on. If you’re using electricity, plug the extension cord into an upstairs wall socket.
If your water is less than an inch deep, a wet-dry vacuum can be used. These work well, but can be very labor intensive;
the tank on a wet-dry vacuum generally holds only 4 to 5 gallons of water and will need to be emptied frequently. 1 inch
of water in a 1500-2000 square foot home would be 1000-1200 gallons and would require approximately 250 empties!
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Pumping Procedure—Equipment
A submersible pump is needed to remove water from a D
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A submersible pump is needed to remove water from a
ooded basement. You can rent this type of equipment
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ooded basement. You can rent this type of equipment
from a construction rental store or a hardware store; this
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from a construction rental store or a hardware store; this
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will be less expensive than purchasing professional pumping
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will be less expensive than purchasing professional pumping
equipment. The pump is encased in a waterproof shell with a
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equipment. The pump is encased in a waterproof shell with a
sealed electrical cord; it connects to a regular garden hose or
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sealed electrical cord; it connects to a regular garden hose or
a sump hose. The power source for the pump will depend
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a sump hose. The power source for the pump will depend
on whether or not you have electricity.
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on whether or not you have electricity.
you will need to connect to a
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you will need to connect to a
generator. Be careful! Do not use gasoline-powered pumps
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generator. Be careful! Do not use gasoline-powered pumps
or generators indoors; these can produce deadly carbon
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or generators indoors; these can produce deadly carbon
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monoxide exhaust fumes. Note: opening doors and windows
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monoxide exhaust fumes. Note: opening doors and windows
Be careful around oodwater that may have been contaminated by sewage. Tetanus shots are recommended when cleaning
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Be careful around oodwater that may have been contaminated by sewage. Tetanus shots are recommended when cleaning
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
1According to the Rain Garden Alliance: do-it-yourself rain garden will cost about $3–$5 a square foot. If you use a landscaper to plan and install the garden, the cost will be
$10–$15 a square foot or more. Plants are the most costly consideration in a rain garden. Parts of the city of Edina are within the Nine Mile Creek Watershed District, which
o ers cost-share grants for rain gardens. The minimum grant is $500 and requires a 25% match. To see if your home is located within the district and to learn more about the
grant program, go to https://www.ninemilecreek.org/
What is a rain garden?
A rain garden is a tool used to decrease runo and lter
pollutants from stormwater. These gardens, built in shallow
depressions, are lled with long-rooted grasses and plants
that soak up rainwater from impervious surfaces—before
the polluted ow enters lakes, rivers, and wetlands. Because
they decrease runo , rain gardens are also useful in ood
prevention. Once established, they require little watering and
minimal maintenance.
In addition to decreasing runo and ltering pollutants, rain
gardens also create habitat for birds and butter ies, recharge
groundwater, reduce mosquito breeding, and enhance
property value.
Actions for Flood Resilient Homes:
Rain Gardens
How do I plant a rain garden?
There are many online resources that provide guidance on the
construction and maintenance of rain gardens. Please see the reference
section at the bottom of this factsheet for resources.
Other Considerations:
• Rain gardens require partial to full sun. They should be built at
least 10 feet away from your home to prevent water damage to
foundations and basements.
• Rain gardens are typically 100 to 300 square feet, depending on the
slope of the surrounding landscape and the size of the area draining
into it; gardens will typically handle runo from an impervious area
three times its size. More than one garden may be needed to handle
runo from large surfaces (e.g., large rooftops).
• To prevent plants from drowning and mosquitoes from breeding,
a rain garden requires soil that is porous enough to soak up water
within 48 hours of a rainstorm. You can test your soil by digging a
wide 10-inch-deep hole, lling it with water, and observing it to see
whether the water disappears within 48 hours.
• Before you dig, contact Gopher State One Call (811) or visit http://
www.gopherstateonecall.org/to locate electrical, gas, or telephone
lines.
Who should use a rain garden?
Rain gardens are particularly bene cial for those who have a large amount of nearby impervious surface (rooftops, walkways,
driveways), have downspouts running into the lawn, or areas downhill from a downspout. They may also be helpful if you have
soil erosion. (With deep-rooted plants, rain gardens hold soil in place and prevent erosion).
image courtesy Minnehahacreek.org
image courtesy Natural Shore:
http://www.naturalshore.com/rain-garden-project-album/
Reduces vulnerability
COST: VARIES1
Reduces exposure
Before ood action During ood action After ood action
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that soak up rainwater from impervious surfaces—before
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that soak up rainwater from impervious surfaces—before
the polluted ow enters lakes, rivers, and wetlands. Because
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the polluted ow enters lakes, rivers, and wetlands. Because
they decrease runo , rain gardens are also useful in ood
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they decrease runo , rain gardens are also useful in ood
prevention. Once established, they require little watering and D
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prevention. Once established, they require little watering and
minimal maintenance. D
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minimal maintenance.
In addition to decreasing runo and ltering pollutants, rain D
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In addition to decreasing runo and ltering pollutants, rain
gardens also create habitat for birds and butter ies, recharge D
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gardens also create habitat for birds and butter ies, recharge
groundwater, reduce mosquito breeding, and enhance
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groundwater, reduce mosquito breeding, and enhance
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construction and maintenance of rain gardens. Please see the reference
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construction and maintenance of rain gardens. Please see the reference
Who should use a rain garden?
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Who should use a rain garden?
Rain gardens are particularly bene cial for those who have a large amount of nearby impervious surface (rooftops, walkways,
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Rain gardens are particularly bene cial for those who have a large amount of nearby impervious surface (rooftops, walkways,
driveways), have downspouts running into the lawn, or areas downhill from a downspout. They may also be helpful if you have
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driveways), have downspouts running into the lawn, or areas downhill from a downspout. They may also be helpful if you have
soil erosion. (With deep-rooted plants, rain gardens hold soil in place and prevent erosion).
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soil erosion. (With deep-rooted plants, rain gardens hold soil in place and prevent erosion).
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During ood action
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For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
What is shoreline restoration?
Shoreline restoration involves the use of native vegetation to
provide a bu er between your yard and the water’s edge. This
bu er (10–50 feet) replaces turf grass.
Although shoreline restoration does not reduce your exposure
to ooding, it can reduce your vulnerability. Unlike turf grass,
native trees, shrubs, forbs, and grasses have long roots that better
withstand the e ects of ooding. Under lengthy, high-water
conditions, this may prevent the need to replace ooded turf.
Actions for Flood Resilient Homes:
Shoreline Restoration
How do I restore my lakeshore?
“Restore Your Shores,” o ered by the Minnesota Department of Natural Resources (DNR) (https://www.dnr.state.mn.us/rys/index.
html) provides online guidance for implementing shoreland restoration projects, including steps and techniques, a plant guide, and
references and resources. Comprehensive guidance, pertinent to Minnesota landscapes, is also available in the book, “Lakescaping
for Wildlife and Water Quality,” published by the Minnesota DNR. Or, consult a local landscaper who specializes in shoreline
restoration.
Reduces exposure
COST: VARIES1
Reduces vulnerability
Before ood action During ood action After ood action
In addition to reducing ood vulnerability, shoreland
restoration has a number of ecological bene ts:
• Deep-rooted native plants are more resistant to wave
and ice erosion and reduce the likelihood of slope
failure.
• Native plantings improve water quality by slowing and
ltering runo before it enters the lake.
• A mixture of native vegetation provides diverse habitat
for sh and wildlife.
• A bu er prevents wave action from stirring up sediment
that can cause the lake to become murky.
• A bu er area provides privacy and aesthetic views while
discouraging nuisance geese.
Other Considerations:
• Some shoreline restoration projects will require a local
or Minnesota Department of Natural Resources permit.
Helpful websites:
https://www.dnr.state.mn.us/lakescaping/index.html
https://www.dnr.state.mn.us/publications/waters/shoreline_alteration.html
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Although shoreline restoration does not reduce your exposure
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Although shoreline restoration does not reduce your exposure
to ooding, it can reduce your vulnerability. Unlike turf grass,
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to ooding, it can reduce your vulnerability. Unlike turf grass,
native trees, shrubs, forbs, and grasses have long roots that better D
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native trees, shrubs, forbs, and grasses have long roots that better
withstand the e ects of ooding. Under lengthy, high-water D
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withstand the e ects of ooding. Under lengthy, high-water
conditions, this may prevent the need to replace ooded turf.D
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conditions, this may prevent the need to replace ooded turf.D
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During ood action
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Reduces vulnerability
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Reduces vulnerability
In addition to reducing ood vulnerability, shoreland
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In addition to reducing ood vulnerability, shoreland
restoration has a number of ecological bene ts:
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restoration has a number of ecological bene ts:
•
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• Deep-rooted native plants are more resistant to wave
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Deep-rooted native plants are more resistant to wave
and ice erosion and reduce the likelihood of slope
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and ice erosion and reduce the likelihood of slope
failure.
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failure.
•
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• Native plantings improve water quality by slowing and
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Native plantings improve water quality by slowing and
ltering runo before it enters the lake.
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ltering runo before it enters the lake.
•
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• A mixture of native vegetation provides diverse habitat
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A mixture of native vegetation provides diverse habitat
for sh and wildlife.
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for sh and wildlife.
A bu er prevents wave action from stirring up sediment
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A bu er prevents wave action from stirring up sediment
that can cause the lake to become murky.
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that can cause the lake to become murky.
A bu er area provides privacy and aesthetic views while
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A bu er area provides privacy and aesthetic views while
discouraging nuisance geese.
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discouraging nuisance geese.
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Helpful websites
https://www.epa.gov/green-infrastructure/manage- ood-risk
https://www.homeadvisor.com/r/ ood-proof-landscaping/
https://www.owntheyard.com/how-to- x-backyard- ooding/
https://aibd.org/6-backyard- ooding-solutions-landscaping-storm-proof-yard/
The damage that can be caused by ood water doesn’t stop at your front door. The way you care for your yard and how you site
and construct accessory structures can reduce both ood exposure and vulnerability.
Actions for Flood Resilient Homes:
Floodproo ng Accessory Structures And Yards
Floodproo ng yards
There are many options you can consider to reduce ooding in your yard.
• Make sure your yard is properly graded: Patios, driveways, walkways, owerbeds—if possible, they should all be graded
so that the water ows away from the house.
• Install a rain garden: Rain gardens protect your yard from ooding by allowing runo water to pool and slowly
percolate into the ground. See the City’s factsheet for more information on rain gardens.
• Install dry wells: Dry wells are underground structures that help rainwater dissipate into the ground. They can be used
for wet spots or small, ood-prone areas on your property.
• Create or take advantage of natural swales: Swales are depressions in the landscape that redirect water ow, normally
to a dry well or a garden bed with good drainage. You can slow the ow by lining the lowest point with rocks or adding
deep-rooted plants on the slope.
• Use heavier mulch: Light-weight mulch can spread under ooding conditions, clogging drains. If using mulch near your
home’s exterior, make sure the mulch is at least six inches from your siding to prevent moisture wicking and rotting.
• Replace impervious surfaces: Impervious (non-porous) surfaces increase runo . Replace them with pervious materials
or landscaping.
• Drain your driveway: Driveways are a big contributor to stormwater runo . You can mitigate the impact of that
stormwater by adding drainage on the sides of the pavement—or by replacing the pavement with a pervious surface.
• Plant a tree: Trees create a leafy canopy that intercepts rainfall and reduces runo . According to the Chesapeake Bay
Foundation, a typical street tree can intercept from 500 to 760 gallons of water per year, depending on the species.
Before ood action During ood action After ood action
Floodproo ng accessory structures
Your yard is an extension of your living space, which needs
to be protected. The rst step in oodproo ng is to site
the accessory structures on your property—your patio, re
table/pit, garden shed, gazebo—on high ground. You can
also reduce your vulnerability by building these structures
with ood-resistant materials. See the City’s factsheet on
Wet Floodproo ng for a list of ood-resistant materials.
You should also secure yard items to prevent them from
being damaged or swept away. Anchor them or attach
them to more stable structures.
Other considerations:
Parts of the city of Edina are within the Nine Mile Creek
Watershed District, which o ers cost-share grants for rain gardens.
The minimum grant is $500 and requires a 25% match. To see if
your home is located within the district and to learn more about
the grant program, go to https://www.ninemilecreek.org/
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Floodproo ng accessory structures
Your yard is an extension of your living space, which needs D
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Your yard is an extension of your living space, which needs
to be protected. The rst step in oodproo ng is to site D
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to be protected. The rst step in oodproo ng is to site
the accessory structures on your property—your patio, re D
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the accessory structures on your property—your patio, re D
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There are many options you can consider to reduce ooding in your yard.
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There are many options you can consider to reduce ooding in your yard.
Patios, driveways, walkways, owerbeds—if possible, they should all be graded
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Patios, driveways, walkways, owerbeds—if possible, they should all be graded
: Rain gardens protect your yard from ooding by allowing runo water to pool and slowly
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: Rain gardens protect your yard from ooding by allowing runo water to pool and slowly
percolate into the ground. See the City’s factsheet for more information on rain gardens.
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percolate into the ground. See the City’s factsheet for more information on rain gardens.
Dry wells are underground structures that help rainwater dissipate into the ground. They can be used
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Dry wells are underground structures that help rainwater dissipate into the ground. They can be used
Swales are depressions in the landscape that redirect water ow, normally
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Swales are depressions in the landscape that redirect water ow, normally
to a dry well or a garden bed with good drainage. You can slow the ow by lining the lowest point with rocks or adding
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to a dry well or a garden bed with good drainage. You can slow the ow by lining the lowest point with rocks or adding
Light-weight mulch can spread under ooding conditions, clogging drains. If using mulch near your
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Light-weight mulch can spread under ooding conditions, clogging drains. If using mulch near your
home’s exterior, make sure the mulch is at least six inches from your siding to prevent moisture wicking and rotting.
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home’s exterior, make sure the mulch is at least six inches from your siding to prevent moisture wicking and rotting.
table/pit, garden shed, gazebo—on high ground. You can D
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table/pit, garden shed, gazebo—on high ground. You can
also reduce your vulnerability by building these structures
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also reduce your vulnerability by building these structures
with ood-resistant materials. See the City’s factsheet on
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with ood-resistant materials. See the City’s factsheet on
Wet Floodproo ng for a list of ood-resistant materials.
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Wet Floodproo ng for a list of ood-resistant materials.
You should also secure yard items to prevent them from
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You should also secure yard items to prevent them from
being damaged or swept away. Anchor them or attach
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being damaged or swept away. Anchor them or attach
For more information on fl ood resilience, contact the Engineering Department at 952-826-0371.
Even if you don’t own a home, your property may be at risk during a ood. Below are some simple steps you can take to reduce
that risk. In addition to decreasing runo and ltering pollutants, rain gardens also create habitat for birds and butter ies, recharge
groundwater, reduce mosquito breeding, and enhance property value.
Actions for Flood Resilient Homes:
Reducing Risk as a Renter or Condo-Owner
Consider buying ood insurance:
It’s important to know that your regular renter’s insurance
policy does not cover ooding. But, ood insurance is
available for renters and condo owners through the National
Flood Insurance Program (NFIP). The policy covers your
personal property and contents during a ood. It does not
include “loss-of-use” coverage or any additional expenses
caused by a ood.
Flood insurance premiums are based on a number of factors
including ood risk, year of building construction, building
occupancy, the number of oors, the location of your
contents, and the deductible and amount of coverage you
choose. Even if you live in a low-to-moderate risk area, it’s
worth considering ood insurance. According to the NFIP,
nearly 26 percent of all ood claims occur in these areas.
Also, you may be eligible for a “preferred risk policy,” which
carries the lowest premiums. The cost for renters’ ood
insurance generally ranges from $150 to $900 per year.
Though ood insurance is provided by the NFIP and prices
are set by the NFIP, it is sold by private insurance companies.
Contact your insurance agent to nd out whether he/she
can provide coverage. If not, call the NFIP at 800-427-4661
to request an agent referral.
If you decide to buy insurance, don’t wait for the next
storm. There’s typically a 30-day waiting period between
when the policy is purchased and when coverage applies.
Consider the low spaces—including
underground garages
If you have personal items in the basement or garage, put
them in covered, plastic containers and store them on
shelving—o the oor. Similarly, don’t leave valuables in
your car if ood waters are predicted.
Get the facts
First, nd out if the building where you live is in a high-risk ood area. You can check by going to the Federal Emergency
Management Agency (FEMA) website https://msc.fema.gov/portal/search and entering your address. It’s also helpful to know
what steps your landlord/association has taken to decrease the building’s exposure and vulnerability. Here are some questions
you might ask:
• Does the building structure have ood insurance? This may be important because it could in uence your landlord’s ability
to recover following a ood—and your ability to continue living in the property.
• Has the landlord/association taken ood resilience measures (wet oodproo ng, dry oodproo ng)?
• Is there a sump pump in the building? Is there a sewer back ow prevention device? This is particularly important if you
store personal items in the basement of the building.
• Is there available above-ground storage in the event ood waters are predicted?
• In the event of an impending ood will the landlord/association be responsible for sandbagging? If not, will you be allowed
to sandbag? (See City factsheet on sandbagging for more information.)
Helpful websites
https://www.fema.gov/national- ood-insurance-program/How-Buy-Flood-Insurance
https://www.policygenius.com/renters-insurance/what-renters-need-to-know-
about- ood-insurance/
Floodwater
level
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It’s important to know that your regular renter’s insurance
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It’s important to know that your regular renter’s insurance
Consider the low spaces—including
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Consider the low spaces—including
underground garages
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underground garages
If you have personal items in the basement or garage, put
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If you have personal items in the basement or garage, put
them in covered, plastic containers and store them on
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them in covered, plastic containers and store them on
shelving—o the oor. Similarly, don’t leave valuables in
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shelving—o the oor. Similarly, don’t leave valuables in
your car if ood waters are predicted.
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your car if ood waters are predicted.
First, nd out if the building where you live is in a high-risk ood area. You can check by going to the Federal Emergency
D
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A
F
T
First, nd out if the building where you live is in a high-risk ood area. You can check by going to the Federal Emergency
Management Agency (FEMA) website https://msc.fema.gov/portal/search and entering your address. It’s also helpful to know D
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Management Agency (FEMA) website https://msc.fema.gov/portal/search and entering your address. It’s also helpful to know
what steps your landlord/association has taken to decrease the building’s exposure and vulnerability. Here are some questions D
R
A
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T
what steps your landlord/association has taken to decrease the building’s exposure and vulnerability. Here are some questions
you might ask:D
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you might ask:
Does the building structure have ood insurance? This may be important because it could in uence your landlord’s ability D
R
A
F
T
Does the building structure have ood insurance? This may be important because it could in uence your landlord’s ability
to recover following a ood—and your ability to continue living in the property.
D
R
A
F
T
to recover following a ood—and your ability to continue living in the property.
Has the landlord/association taken ood resilience measures (wet oodproo ng, dry oodproo ng)?
D
R
A
F
T
Has the landlord/association taken ood resilience measures (wet oodproo ng, dry oodproo ng)?
Is there a sump pump in the building? Is there a sewer back ow prevention device? This is particularly important if you
D
R
A
F
T
Is there a sump pump in the building? Is there a sewer back ow prevention device? This is particularly important if you
store personal items in the basement of the building.
D
R
A
F
T
store personal items in the basement of the building.
Is there available above-ground storage in the event ood waters are predicted?
D
R
A
F
T
Is there available above-ground storage in the event ood waters are predicted?
In the event of an impending ood will the landlord/association be responsible for sandbagging? If not, will you be allowed
D
R
A
F
T
In the event of an impending ood will the landlord/association be responsible for sandbagging? If not, will you be allowed
to sandbag? (See City factsheet on sandbagging for more information.)
D
R
A
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to sandbag? (See City factsheet on sandbagging for more information.)
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Floodwater
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Floodwater
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level
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