Wisconsin Floodplain Zoning — Wis. Stat. § 87.30 + NR 116 (WI)
Tracked preemption from the Wisconsin overlay bundle.
Overview
← All state preemptionsWisconsin overlay roll-upWisconsin zoning wikiWisconsin building codesFederal overlaysGlossaryFederal-conflict: Yes
Effective
1965-01-01
Sunset
—
Authority
state
Scope
state:WI
Other Wisconsin preemptions
Wisconsin Livestock Facility Siting — Wis. Stat. § 93.90 + ATCP 51 (CAFO preemption)Wisconsin Nonmetallic Mining (Frac Sand) Reclamation — Wis. Stat. Ch. 295 + NR 135Lower Wisconsin State Riverway — Wis. Stat. § 30.40 et seq.Wisconsin Local Historic Preservation — Wis. Stat. § 44.44 (Certified Ordinance)Fort McCoy / Volk Field AICUZ + Military Influence Area — federal/local coordinationWisconsin Brownfield Response / Spill Law — Wis. Stat. § 292.11 + DNR RR ProgramWisconsin Farmland Preservation — Wis. Stat. Ch. 91Wisconsin Tax Increment Law (TIF) — Wis. Stat. § 66.1105
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
parcel.in_designated_floodplain == TruePreempted fields
3 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
review_type | require | local_floodplain_zoning_per_NR_116 | §87.30 requires counties, cities, and villages to adopt floodplain zoning consistent with NR 116 within one year of adequate hydraulic data. Once DNR adopts a floodplain ordinance for a non-compliant locality, local officials must administer it as if locally adopted; local modifications require DNR written consent. |
base_districts[*].min_finished_floor_elevation_ft | floor_at | base_flood_elevation_plus_2_ft_freeboard | NR 116 establishes a 2-ft freeboard requirement above the base flood elevation for residential construction in the floodway fringe; structures generally prohibited in the floodway. |
base_districts[*].allowed_uses | restrict | subject_to_floodway_and_floodfringe_use_tables |
Citation
Authority source
Wis. Stat. § 87.30; Wis. Admin. Code NR 116
Research notes
State-mandated floodplain regime coordinated with FEMA NFIP. Local participation in NFIP is conditioned on adoption of an NR 116-compliant ordinance. DNR has a state-substitution remedy if a local unit fails to act (§87.30(1)(b)). Federal conflict check enabled for NFIP coordination.