# Relationship history for MSHA mine 0102321

Current hierarchy: **Terry Larry → Larry Terry Contractors Inc → Mccormick Pit No 1**

- 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

- **controller_controls_mine:** Terry Larry → Mccormick Pit No 1; 1976-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R J Coal Company Inc → Mccormick Pit No 1; 1981-05-01 to 1981-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Summerville James & Gary → Mccormick Pit No 1; 1981-05-01 to 1981-10-08; source msha-controller-operator-history
- **controller_controls_operator:** Summerville James & Gary → R J Coal Company Inc; 1981-05-01 to 1981-10-08; source msha-controller-operator-history
- **operator_operates_mine:** Larry Terry Contractors Inc → Mccormick Pit No 1; 1981-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry Larry → Larry Terry Contractors Inc; 1981-10-09 to current/open; source msha-controller-operator-history