# Relationship history for MSHA mine 5001322

Current hierarchy: **O'Malley Sales & Luther Trust J V → O'Malley Sales/Luther Trust J V → Pioneer 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:** Lake Otis Gravel Sales Inc → Pioneer Pit; 1980-05-01 to 1991-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Luther Stephen-Charles Spencer Et Al → Pioneer Pit; 1980-05-01 to 1991-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Luther Stephen-Charles Spencer Et Al → Lake Otis Gravel Sales Inc; 1980-05-01 to 1991-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Lake Otis Gravel Sales Inc → Pioneer Pit; 1991-10-10 to 1992-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Martinez Felix & Joseph Sheldon → Pioneer Pit; 1991-10-10 to 1992-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Martinez Felix & Joseph Sheldon → Lake Otis Gravel Sales Inc; 1991-10-10 to 1992-07-14; source msha-controller-operator-history
- **operator_operates_mine:** O'Malley Sales/Luther Trust J V → Pioneer Pit; 1992-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** O'Malley Sales & Luther Trust J V → Pioneer Pit; 1992-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** O'Malley Sales & Luther Trust J V → O'Malley Sales/Luther Trust J V; 1992-07-15 to current/open; source msha-controller-operator-history