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Blue Earth County, MN Environmental Rules: Flood Zones (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

FEMA flood zone rules in Blue Earth County, MN, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.

Key Facts

Permit authority: County zoning administrator
Regulated districts: Floodway, flood fringe, general floodplain
Exempt: Farm fences, gardening, mailboxes
Max penalty: $1,000 fine or 90 days jail
Map source: FEMA FIRM panels dated Feb 22, 2024

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in Blue Earth County, MN.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up Blue Earth County, MN on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

In unincorporated Blue Earth County, a zoning administrator permit is required before building, filling, fencing, or otherwise developing land in the floodway, flood fringe or general floodplain district. Farm fences are exempt, but pools, decks and utility work are not. Violations become a public nuisance and misdemeanor prosecuted under Code Sec. 8-153.

These county ordinances apply to unincorporated areas of Blue Earth County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

A permit must be obtained from the zoning administrator to verify compliance with all applicable standards outlined in this chapter prior to the following uses or activities: (1)The erection, addition, modification, rehabilitation, repair, or alteration of any building, structure, or portion thereof. ... (2)The construction of a fence, pool, deck, or placement of a permanent object that may cause a potential obstruction. Farm fences, as defined in section 8-41 of this chapter, are not considered to be an obstruction, and as such, do not require a permit.

View official code

Full Breakdown

Chapter 8 of the Blue Earth County Code creates three overlay floodplain districts: the floodway, flood fringe, and general floodplain district, mapped on FEMA's Flood Insurance Rate Map panels 27013CIND1A and 27013CIND2A dated February 22, 2024 (Sec. 8-52). Under Sec. 8-61, anyone in unincorporated Blue Earth County must obtain a permit from the zoning administrator before erecting, modifying, or repairing any building or structure; constructing a fence, pool, deck, or other object that could obstruct floodwaters; changing a nonconforming use; repairing flood, fire or tornado damage; placing fill, excavation, utilities or a septic system; storing materials; or altering a watercourse.

Farm fences are excluded from the obstruction permit trigger. Sec. 8-62 exempts minor activities such as gardening, farming, or installing a mailbox or flagpole, and lets existing uses continue without a permit if they do not encroach further on the regulated floodplain. Permit applications are reviewed through the Property and Environmental Resources Department, which also administers the shoreland and SSTS standards in Chapters 6 and 14. Disputes over where the mapped floodplain boundary falls on the ground go to the county Board of Adjustment for a hearing under Sec.

8-51(3). Any structure, fill, or other unpermitted floodplain use is declared a public nuisance under Sec. 8-151 and can be enjoined by the county or the Department of Natural Resources under Sec. 8-152.

Violations & Fines

A floodplain violation is a misdemeanor under Sec. 8-153, punishable by a fine up to $1,000.00, imprisonment up to 90 days, or both, and each day the violation continues is a separate offense. The zoning administrator can pursue prosecution, injunctions, after-the-fact permits, corrective-measure orders, or ask the National Flood Insurance Program to deny flood insurance on the property.

Frequently Asked Questions

Do I need a permit to build a fence near a floodplain in Blue Earth County?

Only if the fence could obstruct floodwaters. Sec. 8-61(2) requires a zoning administrator permit for fences, pools, decks or other objects that pose a potential obstruction, but it specifically exempts farm fences as defined in Sec. 8-41 from that requirement.

What maps define the floodplain in unincorporated Blue Earth County?

The county incorporated FEMA's Flood Insurance Study and Flood Insurance Rate Map panels 27013CIND1A and 27013CIND2A, dated February 22, 2024, by reference under Sec. 8-52. Those maps, on file with the Property and Environmental Resources Department, control the floodway, flood fringe and general floodplain district boundaries.

What happens if I develop in the floodplain without a permit?

Unpermitted structures, fill, or other floodplain uses are declared a public nuisance under Sec. 8-151. The county or the Department of Natural Resources can sue to abate it, and Sec. 8-153 makes the violation a misdemeanor carrying up to a $1,000.00 fine, 90 days in jail, or both.

Sources & Official References

[1]Blue Earth County Code of Ordinances (Municode)

Other rules in Blue Earth County

Erosion ControlSome Restrictions Stormwater ManagementSome Restrictions Flood Elevation RequirementsSome Restrictions Noise Ordinances: Amplified Music & Outdoor SoundLight Restrictions Parking Rules: Snow Removal Parking RulesSome Restrictions Parking Rules: Loading ZonesSome Restrictions Parking Rules: Driveway RulesSome Restrictions Parking Rules: Commercial & Oversized VehiclesSignificant Restrictions Parking Rules: Abandoned VehiclesSignificant Restrictions

All Blue Earth County rules

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