Blog · October 14, 2026 · North Dakota
Using the Slope County Flood Map
The zone on FEMA's map affects insurance, building and resale near Amidon.
Main page: Slope County, ND GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any purchase around Marmarth, check the Slope County flood map: the zone on that map shapes insurance, building rules and resale. This Slope County guide covers: finding the address on FEMA's map, decoding A, AE and X, and matching it with the county parcel viewer.
Where the Slope County flood map lives
For a more interactive look, try the National Flood Hazard Layer viewer, which lets you click a spot and read its zone, whether the land is near White Lake National Wildlife Refuge or elsewhere in the county. Vacant ground around Little Missouri National Grassland can still be found: search the nearest road then click the parcel area.
Where the parcel data lives
Begin with the Slope County parcel viewer; it includes each tax parcel in the county, Stewart Lake National Wildlife Refuge included. When a rural tract has no street number, follow the nearest road on the aerial and select the outline, for land near Little Missouri National Grassland included. For land near White Lake National Wildlife Refuge, the parcel card normally shows the owner of record, assessed acreage, the parcel number and in many cases the last transfer.
Reading A, AE and X
For a parcel near Amidon, A and V zones are Special Flood Hazard Areas, meaning a 1% or greater chance of flooding each year. For a home near Amidon, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; plain X, or C on older maps, is minimal risk.
Questions to ask before you buy
For a tract near Amidon, request about past flood claims before closing; an insurance quote early keeps the budget honest.
Use the county map alongside FEMA
FEMA's map shows zones but not ownership, so check the Slope County parcel viewer too for the outline of the tract near Amidon.
Sections, lots and bearings
North Dakota follows the Public Land Survey System, which means a tract near Little Missouri National Grassland is described by section, township and range. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though real sections near White Lake National Wildlife Refuge vary in size. Copy the legal description from the record for the parcel near Marmarth before you request a deed or survey.
Low spots and local drainage
Creeks and ditches near White Lake National Wildlife Refuge may not have detailed mapping, so look for water marks and debris lines. Wet ground around Amidon is a separate issue from flood zones; the National Wetlands Inventory mapper shows mapped wetlands.
A quick look at the area
Amidon is the county seat, which is where the courthouse records live. You'll also find Marmarth, Little Missouri National Grassland, Stewart Lake National Wildlife Refuge, and White Lake National Wildlife Refuge, where town lots give way to larger tracts. Roughly 674 people live in Slope County (Census Bureau estimate, 2023) on about 1,215 square miles. Slope County was formed in 1914, and some chains of title near Marmarth are long. Features like Little Missouri National Grassland help you orient on the aerial around Stewart Lake National Wildlife Refuge.
Who handles what
Deeds, mortgages and recorded plats for land near Stewart Lake National Wildlife Refuge are with the County Recorder, usually searchable by name or document number. Zoning, permits and septic questions near Little Missouri National Grassland go to planning, building or health offices, town or county, depending on location.
When a parcel crosses a boundary
Slope County touches Fallon County, MT, Adams County, Billings County, Bowman County, and Golden Valley County, all with their own assessor records. Ground near Little Missouri National Grassland that runs to the line can show up across two assessors' files, so open the neighboring map as well. With a lot near Amidon, the Platbookmapper state page links every bordering county map for North Dakota.
Money questions tied to the zone
If a building sits in a Special Flood Hazard Area and the loan is federally backed or regulated, mandatory purchase rules apply where the community participates in the National Flood Insurance Program, for land near White Lake National Wildlife Refuge included. Remodeling a house in a zone near Marmarth usually means extra permit review; ask the local floodplain administrator early.
Slope County: common questions
Does the county parcel map show flood zones near Stewart Lake National Wildlife Refuge?
In most cases, the parcel map near Stewart Lake National Wildlife Refuge might show FEMA zones, though it can lag behind FEMA's current panels.
What is the difference between Zone A and AE around White Lake National Wildlife Refuge?
On ground around White Lake National Wildlife Refuge, AE is a Special Flood Hazard Area with a published base flood elevation; unnumbered A zones don't list one.
Why did my flood zone near Stewart Lake National Wildlife Refuge change?
It depends, but a new study can move a zone line near Little Missouri National Grassland; your community is notified before changes take effect.
What if the flood map is wrong for my lot near Stewart Lake National Wildlife Refuge?
In most cases, FEMA's LOMA process is the usual route when a building near White Lake National Wildlife Refuge sits above the base flood elevation; a surveyor's elevation data supports it.
Does the parcel map work on a phone around Stewart Lake National Wildlife Refuge?
Most viewers run in a mobile browser; load it before you lose coverage near Little Missouri National Grassland.
Open the official Slope County, ND parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.