# Relationship history for MSHA mine 4104540

Current hierarchy: **Michael B  Debault → Mine Service LTD → Mine Service LTD Jarrell 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

- **controller_controls_mine:** Keith  Debault → Mine Service LTD Jarrell Pit; 1997-12-01 to 2025-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Mine Service LTD → Mine Service LTD Jarrell Pit; 2005-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Debault → Mine Service LTD; 2005-07-01 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Michael B  Debault → Mine Service LTD Jarrell Pit; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael B  Debault → Mine Service LTD; 2025-02-10 to current/open; source msha-controller-operator-history