# Relationship history for MSHA mine 4202129

Current hierarchy: **Donald J  Larkin → Southwest Stone Inc → SHIVWIT PIT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Southwest Stone Inc → SHIVWIT PIT; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald J  Larkin → SHIVWIT PIT; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald J  Larkin → Southwest Stone Inc; 1996-04-01 to current/open; source msha-controller-operator-history