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Rocky Ridge, Ohio
Inside Rocky Ridge's city limits, a shallow water table limits basements on 88% of mapped land, the highest of 8 cities in Ottawa County. Shrink-swell clay limits houses without basements on 65%, the highest of 8 cities in Ottawa County.
That water-table share is above Ottawa County's 75%. FEMA's flood data list no flood losses since 2016 in ZIP code 43458 overlapping the city. Of its 122 homes, 74% were built before 1980; the median dates from 1955.
Data as of October 13, 2026 · sources · in Ottawa 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 Rocky Ridge
Basement waterproofing in Rocky Ridge: a shallow water table limits basements on 88% of Rocky Ridge's mapped land, more than in 76% of Ohio cities.
In Ottawa County, 9% of the 75 flood-loss buildings with a recorded foundation type had basements.
About 100 of Rocky Ridge's 122 homes are detached houses.
Soil under Rocky Ridge city limits
| Expansive clay (limits slab homes) | 65.2% |
| High water table (limits basements) | 88.3% |
| Septic fields very limited | 94.4% |
| Clay swell (LEP, by area) | 5.3% |
| High-swell land (LEP 6%+) | 19.3% |
| Mapped soil | 651 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Hoytville | 41% | 99% |
| Nappanee | 25% | n/a |
| Toledo | 19% | n/a |
| Milton | 6% | n/a |
| Haskins | 2% | n/a |
| Millsdale | 2% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 5.3% by land area here, and 19% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 65% of the mapped land.
On 88% of Rocky Ridge's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 94% of the land very limited for septic absorption fields.
Drought in Ottawa County
0% of Ottawa 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 Rocky Ridge. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43458 | 99% | 0 | $0 |
Homes in Rocky Ridge
| Housing units | 122 |
| Median year built | 1955 |
| Built before 1980 | 74% |
| Built 2000 or later | 10% |
| Owner-occupied | 78% |
| Median value, owner-occupied | $97,100 |
| Single-family detached | 97% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Oak Harbor | 4 mi | 51% | 77% |
| Elmore | 6 mi | 4% | 76% |
| Lindsey | 8 mi | 3% | 91% |
| Genoa | 8 mi | 55% | 78% |
| Clay Center | 8 mi | 49% | 65% |
| Woodville | 10 mi | 47% | 81% |
| Millbury | 11 mi | 49% | 89% |
| Gibsonburg | 11 mi | 30% | 47% |
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