# Relationship history for MSHA mine 0405284

Current hierarchy: **Darren  Morehead → Butte Sand & Gravel → West Butte 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Darren  Morehead → West Butte Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** West Butte Aggregate → West Butte Pit; 1996-04-01 to 2001-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Charles R  Jeffries → West Butte Pit; 1996-04-01 to 2001-01-25; source msha-controller-operator-history
- **controller_controls_operator:** Charles R  Jeffries → West Butte Aggregate; 1996-04-01 to 2001-01-25; source msha-controller-operator-history
- **operator_operates_mine:** Butte Sand & Gravel → West Butte Pit; 2001-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darren  Morehead → Butte Sand & Gravel; 2001-01-26 to current/open; source msha-controller-operator-history