Phelps County sits on karst, so sinkholes are a real question

A pretty spring or wooded hollow in Phelps County can be part of a larger karst system. In this Ozark landscape, water can dissolve underground channels and create sinkholes, springs, and caves.

The same geology that feeds nearby springs can also matter at home. Sinkholes can affect drainage and stormwater. They can also complicate building, septic siting, and well protection.

Before buying land or building, ask whether the parcel has mapped sinkhole or karst features. Also ask how stormwater moves after a hard rain. The Missouri Geological Survey is headquartered in Rolla and maintains geologic and karst data, including GeoSTRAT. That is the place to begin before guessing from a driveway, pasture, or pretty dry-weather view.