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FEMA floodplain remap: lower Mill Creek & Dockside

FEMA's draft flood maps expand the mapped floodplain by ~40 parcels; an appeal window is expected this fall.

Updated Thu, June 18· Decided by: FEMA (maps); City Council (local floodplain code response)
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What is happening

FEMA is updating Alder Creek's flood insurance rate maps for the first time since 2009. Preliminary maps released in May add roughly 40 parcels to the mapped 100-year floodplain, mostly in lower Mill Creek and the eastern edge of the Dockside District. The city hosts an open house July 30; a formal 90-day appeal period is expected to open in the fall, with final maps in late 2027.

Why it might matter

Being mapped into the floodplain changes what owners can build and typically requires flood insurance for mortgaged homes — often $800–$2,500 per year. It also feeds directly into the Dockside rezone: the two lowest parcels there may face stricter standards. The maps aren't final, and the appeal window is the point where owners with better elevation data can contest them.

What is known

  • Preliminary maps were issued May 12 and are viewable on FEMA's Map Service Center and at City Hall.
  • The remap incorporates the new Mill Creek culvert's capacity — one reason some parcels came *out* of the floodplain even as others went in.
  • City floodplain administrator holds walk-in hours Tuesdays 2–5 PM through September.
  • Elevation certificates from a licensed surveyor (typically $600–$1,200) are the main basis for a successful appeal.

Still uncertain

  • Exact appeal window dates — FEMA has said "fall 2026" but not published the start date.
  • Whether the city will fund group elevation surveys for affected blocks (council has discussed it once, no motion).
  • Final parcel count; preliminary lines typically shift somewhat after appeals.

Open questions are listed on purpose. Treat certainty claims you see elsewhere against this list.

Who or what may be affected

Owners of the ~40 newly mapped parcels

Flood insurance requirements and stricter rebuild/remodel standards if maps finalize as drafted.

Buyers and sellers in lower Mill Creek

Pending map status already shows up in disclosures and is affecting negotiations, per local agents.

The Dockside rezone

Final map lines determine developable envelope on the district's two lowest parcels.

Thoughtful actions available

Check whether your parcel is affected

Get oriented · 5 minutes

Look up your address on the preliminary map viewer, or bring your address to the July 30 open house. Five minutes of checking beats a surprise at refinance time.

Open house, July 30

Show up · 30 minutes · by Thu, July 30

FEMA and city staff at map tables. If your parcel is near a line, this is where to learn about elevation certificates and the appeal process.

Sources

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