21 helical piers, 2-story residence
- Site finding
- Bearing soil saturated silty clay above till. Original footing 28″ — well above the 42″ frost line. Differential settlement 1.4″ at NW corner.
- Outcome
- Piers driven to 27 ft, torque-verified to 6,400 ft-lb. Recovered 1.1″ on lift survey. Engineer's report issued.