# Relationship history for MSHA mine 2200492

Current hierarchy: **Kenneth  Laird → Loflin Sand & Gravel Company Inc → LOFLIN 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:** Loflin Sand & Gravel Company → LOFLIN PIT; 1979-01-01 to 1994-11-30; source msha-controller-operator-history
- **controller_controls_mine:** John  Loflin → LOFLIN PIT; 1979-01-01 to 1994-11-30; source msha-controller-operator-history
- **controller_controls_operator:** John  Loflin → Loflin Sand & Gravel Company; 1979-01-01 to 1994-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Loflin Sand & Gravel Company Inc → LOFLIN PIT; 1994-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Laird → LOFLIN PIT; 1994-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Laird → Loflin Sand & Gravel Company Inc; 1994-12-01 to current/open; source msha-controller-operator-history