Frankfort, Kentucky: what the ground under the city is like
Frankfort sits in Franklin County, on bluegrass karst plateau. The soil mapped here is predominantly classified well drained — and that classification, not the rainfall total, is what decides how a basement behaves.
25% of the mapped soil area around Frankfort is wet enough that the USDA describes it as needing artificial drainage.
Linear extensibility 5.4% — moderate.
Shallowest annual water table around 145 cm (4.8 ft).
Values are for Franklin County, which is what the soil survey resolves to. Full county report · soil map for a specific address.
The ground under Frankfort
Bluegrass karst plateau. Phosphatic limestone residuum with well-developed karst
Karst can keep a basement dry for decades and then flood it in an hour when an underground route surcharges. A pump sized for the average is not sized for that.
When it shows up here
| Water | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ground movement | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
Water peaks in April and May with the spring rains. The dry late summer is when soil movement shows up instead, so the two problems take turns.
Climate pattern for this physiographic region, not a forecast for your house and not from the soil survey. It answers a question homeowners actually ask: when does this show up.
What repairs cost in Kentucky
| Reference job | Modelled range |
|---|---|
| Interior drain along two walls + sump pump | $4,550–$9,750 |
| Exterior excavation of one 40 ft wall | $3,400–$9,700 |
| Underpinning on 10 piers | $13,500–$28,800 |
Regional factor for KY: ×0.90. Full cost breakdown for Kentucky · run your own dimensions.
ZIP codes in Frankfort
40601, 40602, 40603, 40604, 40618, 40619, 40620, 40621, 40622
Soil does not stop at a city boundary, and neither does this data — every ZIP code above resolves to the same county soil survey. For the individual survey polygons around one address, use the soil map.
Questions about Frankfort
Is the soil the same everywhere in Frankfort?
No. These values describe Franklin County as a whole, which is the unit the soil survey publishes. Within a city, map units change over a few hundred metres — the soil map draws the actual polygons around a point and is the honest answer for one address.
Which contractor should I call in Frankfort?
We do not rank or recommend individual firms and we are not one. What this page is for is knowing which kind of work the ground here points to before anyone quotes you, and which claim to check. If you want quotes, the form below passes your request to the named networks.
Does this replace an inspection?
No. It tells you what the ground is; an inspection tells you what your building is doing on it. The useful order is: read this, print the brief for your county, then have someone look.
Get quotes in Frankfort
We pass what you enter to the contractor networks listed below. You choose whether to hire anyone.
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