Can you pour concrete in a sinkhole?

You can pour concrete in a sinkhole in some situations, but it is generally not recommended as permanent solution without proper investigation, because sinkholes are caused by underlying geological instability and simply filling with concrete may not address root cause and can cause problems elsewhere. Small shallow sinkholes caused by decaying organic material or broken pipe might be filled with concrete after proper compaction and engineering advice, but large or active sinkholes related to karst geology, limestone dissolution, or groundwater issues require geotechnical investigation, soil testing, and engineered remediation that may involve grouting, compacted fill, drainage improvements, and professional assessment. Pouring concrete into large sinkhole without understanding cause can divert water flow and cause new sinkholes nearby, and may not be structurally stable. In many states like Florida and Missouri, sinkhole repair must be done by licensed professionals and may require permits. For safety and legal reasons, if you have sinkhole on property, contact geotechnical engineer, insurance company, and local authorities before attempting to fill it yourself with concrete.