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Flood Management Projects
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See what we're working on:
MMSD started its flood management work in 1998 after flooding caused millions of dollars in
destruction that summer and the previous year.
By protecting homes and businesses from flooding, the projects also help keep flood water out of
the sewer system: reducing the risk of sewer overflows and water pollution. Most buildings have
floor drains that are direct connections to the sanitary sewer system. When a basement floods,
floor drains funnel all that water into the sanitary sewer system.
All District flood management projects are designed to provide a level of protection for the
one-percent probability flood, commonly referred to as the 100-year flood.
Flood management projects include structural measures (or things we build) and nonstructural
measures (or land we acquire and practices we adopt). Some examples include:
- Floodwater basins
- Property acquisitions and easements
- Property floodproofing
- Earthen berms and floodwalls
- Stream corridor improvements
- Stormwater best management practices (BMPs)
- In cooperation with agency partners and with input from the general public, MMSD has
planned, designed, and constructed about $200 million worth of flood management projects
to date with more than $300 million additional work planned for the future. This work
protects investments in sewer infrastructure and pollution prevention.
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