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Indiana Code 13-18-22 — State Regulated Wetlands Permit (IDEM) (IN)

Tracked preemption from the Indiana overlay bundle.

Overview

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Effective
2004-07-01
Sunset
—
Authority
state
Scope
state:IN
Other Indiana preemptions
Indiana HB 1001 (2026) — Statewide Housing-and-Zoning Reform (Default By-Right with Annual Local Opt-Out)Indiana HEA 1210 (2025) — Strengthened STR Preemption / No Numeric Rental CapsIndiana HEA 1005 (2025) — RIF Loan Priority Conditioned on Pro-Housing Land-Use PoliciesIndiana Code 5-1.2-15.5 — Residential Housing Infrastructure Assistance Program (RHIAP / RIF, created by HEA 1005 of 2023)Indiana Code 32-31-1-20 — Rent Control & Mandatory Inclusionary Zoning PreemptionIndiana Code 36-1-24 — Short-Term Rental Preemption (Owner-Occupied as Permitted Residential Use)Indiana Code 13-19 — Environmental Management Generally / IFA Brownfields ProgramIndiana Lake Michigan Coastal Program — NOAA-Networked Coastal Zone

Trigger predicate

When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.

AND
  • parcel.geometry geographic match
  • parcel.wetland_class ∈ {II, III}

Preempted fields

2 fields on the base district schema are rewritten when the trigger fires.

FieldOpValueNote
review_typerequireIDEM_State_Regulated_Wetlands_permitActivity in a state-regulated (non-WOTUS) wetland requires IDEM permit; Class III protections strongest, Class II reduced post-2021, Class I largely deregulated by SB 389 (2021).
base_districts[*].wetland_impact_findingsrequireavoidance_minimization_mitigation_sequencePermit applicant must demonstrate avoidance, minimization, and mitigation per IDEM rule. Class I exemption broadened by SB 389.

Citation

Authority source
Ind. Code § 13-18-22 (State Regulated Wetlands); permit core at § 13-18-22-1; class system at § 13-18-22-2; amended by SB 389 (2021)
§ §13-18-22-1 (permit); §13-18-22-2 (classes)
https://iga.in.gov/laws/2025/ic/titles/13#13-18-22

Research notes

Per-parcel geographic predicate against IDEM-classified wetlands (Class I, II, III). State program covers wetlands NOT regulated under federal Clean Water Act §404 (post-Sackett v. EPA, this universe expanded). SB 389 (2021) substantially reduced state protection for Class I and exempted Class II wetlands smaller than ¼ acre. Federal conflict check enabled because federal jurisdiction floor (WOTUS) determines which wetlands fall to the state program.