# Relationship history for MSHA mine 1200696

Current hierarchy: **Adam  Lucas; Kevin B.  Lucas → Mauckport Sand & Gravel → Mauckport Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Lucas Corporation → Mauckport Sand & Gravel; 1950-01-01 to 2009-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Patrick N  Lucas et al → Mauckport Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick N  Lucas et al → Lucas Corporation; 1950-01-01 to 2009-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Allen  Edwards et al → Mauckport Sand & Gravel; 2009-01-26 to 2012-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Mauckport Sand & Gravel → Mauckport Sand & Gravel; 2009-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen  Edwards et al → Mauckport Sand & Gravel; 2009-07-01 to 2012-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Lucas et al → Mauckport Sand & Gravel; 2009-07-01 to 2012-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Kevin B.  Lucas et al → Mauckport Sand & Gravel; 2012-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin B.  Lucas et al → Mauckport Sand & Gravel; 2012-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adam  Lucas et al → Mauckport Sand & Gravel; 2012-08-14 to current/open; source msha-controller-operator-history