Blog · October 14, 2026 · South Dakota
Fall River County Flood Zone Map: checking a property's flood zone
The zone on FEMA's map affects insurance, building and resale near Angostura.
Main page: Fall River County, SD GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Ahead of any purchase around Ardmore, pull up the Fall River County flood zone map: the zone on that map shapes insurance, permits and resale. In this Fall River County guide: finding the address on FEMA's map, reading the zone codes, and pairing it with the Fall River County CAMAvision map.
Getting started with the Fall River County flood zone map
If the land is near Black Hills National Forest, the official source is FEMA's Flood Map Service Center: enter the street address, and choose the dynamic map. Vacant ground around Black Hills National Forest is still easy to locate: zoom in from US Route 18 then click the parcel area.
The free map to start with
Begin with the Fall River County CAMAvision map; it maps each tax parcel in the county, Hot Springs included. If you only know roughly where the land is, follow US Route 18 on the aerial until the lines appear, then click inside the one you want, for land near Edgemont included. If the land is near Dudley, the parcel card usually lists the owner of record, acreage on the tax roll, a parcel ID and sometimes recent sales.
Neighboring parcel maps
The county touches Dawes County, NE, Sioux County, NE, Custer County, Oglala Lakota County, and Niobrara County, WY, and each of those keeps its own parcel map for land near Cheyenne River. Ground near Oelrichs that runs to the line may show up across two assessors' files, so open the adjacent map too. For a parcel near Dudley, our state page links each bordering county map across South Dakota.
Sections, lots and bearings
South Dakota follows the Public Land Survey System, which means a tract near Cheyenne River is described by section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though sections near Angostura Recreation Area can be irregular. Write down the legal description for the tract near Dudley before you request a deed or survey.
Beyond the mapped zones
Creeks and ditches near Oelrichs aren't always studied in detail, so look for water marks and debris lines. Marshy spots near Oelrichs can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
Backing up the map with records
When the details count, request the recorded deed from the Register of Deeds; the parcel line is a drawing of it, for land near Maverick Junction included. For land near Oral, have ready the document number shown in the record panel to skip a name search.
Reading A, AE and X
Closer to Hot Springs, any A or V zone mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. If you're looking near Dudley, a shaded X area is moderate risk, roughly the 100- to 500-year range; plain X, or C on older maps, means minimal mapped risk.
Limits of the parcel data
On ground around Ardmore, listed acreage is an assessed number; only a licensed surveyor establishes the real corners on the ground. If you're looking near Edgemont, records update in batches, so a deed recorded last month might lag behind.
Matching the zone to the lot lines
Where a floodplain cuts across acreage near Oelrichs, the structure's footprint is the key question.
Getting your bearings
Hot Springs holds the county offices, home to the main records offices. You'll also find Edgemont, Oelrichs, Angostura, and Ardmore, each with its own cluster of lots. Around 7,393 people live in this county (Census Bureau estimate, 2023) across about 1,740 square miles for land near Black Hills National Forest. The county dates to 1883, so old deeds can run back a long way for land near Black Hills National Forest. Features like Cheyenne River and Angostura Recreation Area are easy to spot when you zoom out.
What to request from a seller
If the land is near Angostura, ask the listing agent whether the home has flooded before closing; getting a quote early avoids surprises.
What a flood zone means for a buyer
For property near Ardmore, an Elevation Certificate from a surveyor helps: it can change the insurance price a lot. Remodeling a house in a zone near Hot Springs usually means extra permit review; check with the county or town building office early.
Fall River County: common questions
Where do I find the BFE for a lot near Cheyenne River?
For a tract near Ardmore, the BFE is printed in AE zones on FEMA's map; local rules may require building above it.
Can I see flood zones on the Fall River County CAMAvision map?
A flood layer may appear in the county CAMAvision map layer list; confirm a lot near Black Hills National Forest on FEMA's map either way.
What is the difference between Zone A and AE in Fall River County?
Out toward Angostura Recreation Area, both are high-risk zones, but only AE has a base flood elevation; unnumbered A zones don't list one.
How often are flood maps updated in Fall River County?
If the land is near Angostura, FEMA revises flood maps panel by panel as new studies finish; your community is notified before changes take effect.
What's a legal description near Angostura Recreation Area?
If the land is near Oelrichs, Deeds use lot and block, metes and bounds or survey descriptions, and the parcel record often summarizes it.
Open the official Fall River County, SD 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.