This paper considers the interaction of two key flood policy instruments commonly used in the US: levees and flood insurance, and measures how much flood insurance demand changes in response to levee provision. Levees are critical infrastructure that reduce expected flood damage in a protected area. Flood insurance, primarily provided through the National Flood Insurance Program, allows households to smooth consumption in the event of flood damage. When a levee is constructed, and later accredited by the Federal Emergency Management Agency (FEMA), it alters inherent flood risk, flood insurance prices, and insurance mandate requirements. Using a novel panel dataset drawing from the National Levee Database, manually collected levee accreditation documentation, and FEMA flood insurance data, we leverage variation in levee construction and accreditation timing within a DID design. Construction timing allows us to examine insurance take-up as a result of decreased flood risk, while accreditation causes changes in insurance prices and mandatory purchase requirements. Consistent with this understanding of levee accreditation, we find that levee construction is not associated with a change in insurance premia, but levee accreditation is associated with decreased flood map risk zoning, and decreases in both offered insurance rates and average purchased insurance premia. Following both levee construction and accreditation, insurance take-up decreases up to a one-third of baseline take-up percent.