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Why can't I build a flood wall around my property?
Floodwalls are illegal under the Issaquah Municipal Code. Floodwalls alter flood patterns, causing impacts to neighboring properties. However, floodwalls are allowed immediately adjacent to buildings, to protect structures only.

Flooding

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1. What is a 100-year flood?
2. Why is the City prone to flooding?
3. Why can't I build a flood wall around my property?
4. Can I remove fallen trees from the stream since they may cause flooding?