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Hollansburg, Ohio
Inside Hollansburg's city limits, a shallow water table limits basements on 100% of mapped land, the 3rd-highest of 18 cities in Darke County. Shrink-swell clay limits houses without basements on 15%.
That water-table share is close to Darke County's 96%. FEMA's flood data list no flood losses since 2016 in ZIP code 45332 overlapping the city. Of its 141 homes, 90% were built before 1980; the median dates from 1939 or earlier.
Data as of October 13, 2026 · sources · in Darke County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
of homes built before 1980
Basement waterproofing in Hollansburg
Basement waterproofing in Hollansburg: a shallow water table limits basements on 100% of Hollansburg's mapped land, more than in 98% of Ohio cities.
About 100 of Hollansburg's 141 homes are detached houses.
Soil under Hollansburg city limits
| Expansive clay (limits slab homes) | 15.4% |
| High water table (limits basements) | 100.0% |
| Septic fields very limited | 100.0% |
| Clay swell (LEP, by area) | 4.7% |
| High-swell land (LEP 6%+) | 0.5% |
| Mapped soil | 78 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 4.7% by land area here, and 1% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 15% of the mapped land.
On 100% of Hollansburg's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 100% of the land very limited for septic absorption fields.
Drought in Darke County
0% of Darke County is in drought (D1 or worse) on the October 13, 2026 map. County detail.
Flood losses by ZIP code
FEMA flood records since 2016 in the ZIP codes that overlap Hollansburg. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45332 | 100% | 0 | $0 |
Homes in Hollansburg
| Housing units | 141 |
| Median year built | 1939 or earlier |
| Built before 1980 | 90% |
| Built 2000 or later | 0% |
| Owner-occupied | 63% |
| Median value, owner-occupied | $69,700 |
| Single-family detached | 78% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Palestine | 4 mi | 1% | 94% |
| New Madison | 5 mi | 3% | 61% |
| Wayne Lakes | 7 mi | under 1% | 14% |
| Eldorado | 9 mi | 20% | 99% |
| New Paris | 10 mi | 9% | 35% |
| Castine | 10 mi | 20% | over 99% |
| West Manchester | 11 mi | 24% | 91% |
| Greenville | 12 mi | 9% | 92% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · Census ACS 2020-2024. Methods · Data status