# Relationship history for MSHA mine 4104226

Current hierarchy: **Michael B  Debault → Mine Service Inc. → Mine Service Ltd.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Keith  Debault → Mine Service Ltd.; 1997-12-01 to 2025-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Mine Service LTD → Mine Service Ltd.; 2000-03-01 to 2010-11-07; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Debault → Mine Service LTD; 2000-03-01 to 2010-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Genesis Aggregate Sales & Construction LLC → Mine Service Ltd.; 2010-11-08 to 2012-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Dave R  Pettingill → Mine Service Ltd.; 2010-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave R  Pettingill → Genesis Aggregate Sales & Construction LLC; 2010-11-08 to 2012-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Mine Service Inc. → Mine Service Ltd.; 2012-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Debault → Mine Service Inc.; 2012-08-10 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Michael B  Debault → Mine Service Ltd.; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael B  Debault → Mine Service LTD; 2025-02-10 to 2010-11-07; source msha-controller-operator-history
- **controller_controls_operator:** Michael B  Debault → Mine Service Inc.; 2025-02-10 to current/open; source msha-controller-operator-history