Something keeps digging a huge tunnel under the concrete slab of my garden shed

The structural damage caused by burrowing animals can range from minor to severe. Groundhog tunnels can extend 8 to 66 feet long and go as deep as 5 feet, which can undermine the stability of the concrete slab. Over time, this can lead to cracks in the foundation, misaligned doors, and even tilting of the entire structure.
It's essential to inspect the slab regularly for signs of stress such as visible cracks, unevenness, or gaps between the slab and the shed structure. Early detection of these issues can prevent more extensive damage and costly repairs.
4. Stop the Nightly Re-Digging With Immediate, Temporary Fixes
To immediately stop the groundhog from re-digging, consider temporary solutions such as placing heavy rocks or paving stones over the entrance hole. Alternatively, use a strong wire mesh or hardware cloth to cover the area, ensuring it's buried at least 1 foot deep and extends outward to prevent tunneling.
These measures are meant to be short-term solutions while you explore more permanent methods of relocating or deterring the animal.
5. Use Humane Harassment Tactics to Make the Burrow Less Appealing
Groundhogs can be discouraged from returning to their burrow by making the area less appealing. One method is to employ motion-activated sprinklers, which scare the animal away with sudden bursts of water. Another effective tactic is to use predator urine or commercial repellents around the burrow entrance.
Creating noise or vibrations, such as with wind chimes or ultrasonic devices, can also deter groundhogs. The goal is to make the environment uncomfortable so the groundhog will naturally seek a new location.
6. Deploy Live Traps the Right Way (And Check Local Wildlife Laws) 

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