Simpson County Sinkhole KY

Central Kentucky is known for its sinkholes. This is because of its karst landscape. Karst is made of soluble bedrock like limestone that dissolves over time. The Kentucky Geological Survey says 40% of the state has rock layers that can form karst features. The Western Pennyroyal region is one of the most active areas.

Rainwater mixed with carbon dioxide makes weak carbonic acid. This acid slowly eats away at underground limestone. It creates voids that can collapse under weight, forming sinkholes.

There are two main types of sinkholes. Dissolution sinkholes form from gradual erosion. Collapse sinkholes happen when the ground fails suddenly. Both types are common where the soil is thin over fractured bedrock.

Historical maps show 92 Kentucky counties have karst activity. Simpson County is in the Western Pennyroyal, a high-risk area. Geological surveys show that underground drainage systems are active here, redirecting surface water.

Knowing about these geological processes helps us understand why the ground is unstable. Researchers say sinkhole frequency is linked to bedrock and human activities. It’s important for communities built on karst terrain to monitor the ground closely.

Recent & Notable Sinkhole Incidents / Case Studies

In June 2025, a sinkhole opened up on Interstate 65’s southbound lanes at Mile Marker 3. It was a big deal for Simpson County. Crews quickly put 23 concrete barrels around the 10-foot-deep hole to keep drivers safe. They also checked the karst formations below.

Fixing the road took 19 days. But, KYTC kept traffic diverted for another week to make sure everything was stable.

Wes Watt from KYTC said, “Nearly 80% of Simpson County sinkholes occur within 48 hours of heavy rainfall.” This sinkhole happened after 4.3 inches of rain in Franklin the week before. It shows how water can erode limestone.

KYTC has a plan for sinkholes:

• They control traffic right away with barriers and signs.
• They check the ground within 6 hours of finding a sinkhole.
• They work with other agencies to check utility lines.

KYTC says sinkholes in Simpson County are “very common” because of the bedrock. They have 12 incidents on roads every year, with most on big roads like I-65.

After 2025, they made some changes:

1. They scan the ground with radar every quarter.
2. They improved stormwater drainage.
3. They watch for vibrations near fault lines.

Risk Factors & What Homeowners Should Do

Simpson County, KY, is at high risk for sinkholes because of its karst geology and weather. The Kentucky Geological Survey says groundwater changes and bad land use are main causes. Homeowners should watch for ground depressions near homes or sudden well water level changes, which happen a lot after heavy rain.

Good drainage systems are key for homes in Simpson County. KYTC data shows that French drains or downspout redirection can cut soil moisture by 45% in storms. It’s important not to fill in sinkholes without a pro’s advice – it can make damage worse. Getting a licensed geotechnical check is a must when buying a home or building in areas prone to sinkholes.

Keeping septic systems in good shape is also important for Kentucky’s rock areas. The KGS suggests yearly checks and no chemicals in drains. Homes with strong foundations have 60% less damage from sinkholes, studies show. Homeowners should take photos of land changes and get soil testing kits from the Simpson County Extension Office.

Insurance in KY usually doesn’t cover sinkhole damage without special coverage. Getting professional help is important – 40% of DIY fixes fail in two years, making costs higher. Keeping soil stable with plants and avoiding heavy machines helps. Talking to certified geologists can give specific advice for Simpson County’s unique geology.

• Author
• Recent Posts

Sinkholemaps.com Team

We are a team passionate about providing sinkhole related information to the public.

Latest posts by Sinkholemaps.com Team (see all)

• Wayne County Sinkhole KY - September 29, 2025
• Woodford County Sinkhole KY - September 29, 2025
• Washington County Sinkhole KY - September 29, 2025