# Relationship history for MSHA mine 3401550

Current hierarchy: **Moore Michael → Moore Of Arkansas → Moore Of Arkansas**

- 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

- **operator_operates_mine:** M & M Sand & Gravel Company → Moore Of Arkansas; 1986-02-01 to 1987-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Myers James & Leo Mathis → Moore Of Arkansas; 1986-02-01 to 1987-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Myers James & Leo Mathis → M & M Sand & Gravel Company; 1986-02-01 to 1987-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Moore Of Arkansas → Moore Of Arkansas; 1987-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Moore Michael → Moore Of Arkansas; 1987-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moore Michael → Moore Of Arkansas; 1987-08-26 to current/open; source msha-controller-operator-history