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Troutdale introduces floodplain code change to require habitat assessments under FEMA pre‑implementation measures
Summary
City staff proposed adding a floodplain habitat assessment report as a required submittal for all floodplain development permits to meet FEMA's pre‑implementation compliance measures (PICMs); staff recommended a permit‑by‑permit habitat assessment pathway to avoid wide prohibitions on development.
The Troutdale City Council held a public hearing to introduce an ordinance amending Chapter 14 (flood management) of the Troutdale Development Code to add a requirement that applicants submit a floodplain habitat assessment report with floodplain development permits. Dakota Meyer, associate planner for the City of Troutdale, presented the staff report and explained the amendment is intended to meet Federal Emergency Management Agency (FEMA) pre‑implementation compliance measures tied to a National Marine Fisheries Service biological opinion.
The amendment matters because FEMA's PICM requirement affects communities that participate in the National Flood Insurance Program (NFIP); Troutdale staff said adopting a compliant option preserves the city's participation in NFIP and avoids broad prohibitions that would bar nearly all development in mapped floodplain areas.
Meyer explained the city evaluated three FEMA‑recognized pathways. Option 1 would prohibit development in special flood hazard areas; option 2 would adopt FEMA's 2024 model ordinance requiring no‑net‑loss mitigation through blanket standards; option 3 requires a special habitat assessment and mitigation plan on a permit‑by‑permit basis to achieve no‑net‑loss standards. Staff recommended option 3, the permit‑by‑permit habitat assessment approach, because Troutdale already processes floodplain development permits on a case‑by‑case basis and staff judged the pathway would impose the least community‑wide disruption while meeting no‑net‑loss goals.
Meyer outlined background from the administrative record: a 2016 National Marine Fisheries Service biological opinion raising concerns about NFIP impacts on threatened species; a 2021 FEMA draft implementation plan; litigation by environmental groups in 2023; and FEMA's July 2024 rollout of PICMs with a December 1, 2024, deadline for communities to select a compliance pathway. Meyer told the council that if a community failed to choose an option, it would default to permit‑by‑permit review as of January 1, 2025.
Councilors asked practical questions about the amendment's scope and cost. Staff said the required habitat assessment must be prepared by a qualified professional and that cost will vary with project scale — a small backyard shed would require a much smaller assessment than a large industrial building or riverfront trail alignment. Councilors also asked whether uncertainty at FEMA about program details could alter requirements; staff said they had heard little additional guidance from FEMA and were proceeding to adopt a locally feasible compliance approach to protect community access to the NFIP.
No vote or ordinance adoption occurred; the item was introduced and staff said the council would consider adoption at a future meeting (staff indicated a May 27 date for adoption). Dakota Meyer said the proposed text inserts the habitat assessment requirement into section 14.035 (floodplain development permit submittal requirements) and that the amendment was initiated by the city with a Planning Commission recommendation in favor.
The council opened and closed the public hearing after limited public comment. Staff emphasized the amendment is flexible in scope because the city retains existing permit triggers and exemptions; if future FEMA guidance changes, the city can revisit the code text.
