Dewey County property record for 509 N Madison Ave, Isabel, SD 57633
| Property Type | Vacant Land |
|---|---|
| Lot Size | 2 acres (87,120 sqft) |
| Owner | 2 Individual Names on File |
| APN | 02-0000-009-0024-000-0-0-00001 |
| Primary APN | 02-0000-009-0024-000-0-0-00001 |
|---|---|
| Alternative APN |
|
| Lot Area | 87,120 sqft (2 acres) |
|---|
| Street Address | 509 N MADISON AVE |
|---|---|
| City | ISABEL |
| State | SD |
| Zip | 57633-6223 |
| Property Category | Vacant Land |
| Property Type | Vacant Land > Uncategorized |
| Legal Description | LOTS 9 & 10, BLOCK 24, MILWAUKEE LAND COMPANY'S FIRST ADDITION, ISABEL CITY PARKING: IC 100% |
| Legal Subdivision | MILWAUKEE LAND COMPANYS FIRST ADDITION |
| Legal Block | 24 |
| Legal Lot Number | 9-10 |
| Jurisdiction | DEWEY SD |
| Township / Civil Division | ISABEL |
| Census Block Group | 2 |
| Census Block | 2131 |
| Census Tract | 941700 |
Source: Dewey County assessment roll, as of November 1, 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Co-owner | Verified Secondary Owner |
| Mailing Address | PO BOX 22, ISABEL, SD 57633-0022 |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Record Updated | Jun 8, 2026 |
Source: Dewey County assessment roll, as of November 1, 2025
| Type | Name |
|---|---|
| State | South Dakota |
| County | Dewey County |
| Municipality | Isabel Town |
| Unified School District | Timber Lake School District 20-3 (PK - 12) |
Source: FEMA National Flood Hazard Layer · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Not on file |
|---|---|
| Nearby Flood Policies | 1 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 46% of the US · lower than 66% of South Dakota |
|---|---|
| Wildfire Likelihood | 0.07% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | ISABEL serves 145 people · EPA ID SD4600175 |
|---|---|
| Water Source | Purchased surface water from TRI-COUNTY RURAL WATER SYSTEM |
| Last State Inspection | Nov 2023 |
| Lead | 2 ppb (2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 64 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Starlink Satellite | 280 / 30 |
| CRST Telephone Authority Fiber | 250 / 100 |
5G and 4G LTE (outdoors only)
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