# Relationship history for MSHA mine 4407291

Current hierarchy: **Charles S  Luck IV → Luck Stone Corporation → Rivanna Plant**

- 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

- **controller_controls_mine:** Charles S  Luck IV  et al → Rivanna Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David D  Willis → Rivanna Plant; 1950-01-01 to 2016-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Rockydale Quarries Corporation → Rivanna Plant; 2011-11-07 to 2018-01-11; source msha-controller-operator-history
- **controller_controls_operator:** David D  Willis → Rockydale Quarries Corporation; 2011-11-07 to 2016-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Willis Trust et al → Rivanna Plant; 2016-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Willis Trust et al → Rockydale Quarries Corporation; 2016-05-18 to 2018-01-11; source msha-controller-operator-history
- **operator_operates_mine:** Luck Stone Corporation → Rivanna Plant; 2018-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles S  Luck IV  et al → Luck Stone Corporation; 2018-01-12 to current/open; source msha-controller-operator-history