If the soakaway crate wasn't wrapped in a non-woven geotextile membrane , surrounding soil can migrate into the void and clog it over time.
While rainwater soakaways shouldn't smell, a blockage can trap organic matter that rots, creating a distinct "drain" smell. Common Causes of Mud and Silt Build-Up soakaway blocked with mud
Unlike a standard pipe blockage, a soakaway failure often shows up in your landscaping first: If the soakaway crate wasn't wrapped in a