Diagnosing Deep Yard Cracks: Tree Roots vs. Subsoil Settlement

36-inch deep cracks appearing months after cottonwood removal are too sudden and deep for root decomposition. Subsoil settlement or utility leaks are more likely.

Elimination Process

1. Tree roots: cause gradual settling over years, not sudden 3-ft cracks.
2. Contact utility company: check for water/sewer line leaks.
3. Consult county geologist or university extension for soil stability assessment.
4. Review contamination plume maps: TCE plume may correlate, but cracks suggest physical void, not chemical.

Urgent Actions

• Document cracks with photos and measurements.
• Notify landlord in writing; cracks may threaten foundation.
• If groundwater contamination is confirmed, lease obligations may be voidable.

Professional geotechnical evaluation is critical for safety and liability.