# Relationship history for MSHA mine 4104353

Current hierarchy: **Michael B  Debault → Mine Service LTD → Little River Materials**

- 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 → Little River Materials; 1997-12-01 to 2025-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Mine Service LTD → Little River Materials; 2002-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Debault → Mine Service LTD; 2002-04-02 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Michael B  Debault → Little River Materials; 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