# Relationship history for MSHA mine 4400031

Current hierarchy: **Charles S  Luck IV → Luck Stone Corporation → Culpeper 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

- **operator_operates_mine:** Culpeper Stone Company Inc → Culpeper Plant; 1950-01-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Koppers Company Inc → Culpeper Plant; 1950-01-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Koppers Company Inc → Culpeper Stone Company Inc; 1950-01-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Culpeper Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles S  Luck IV  et al → Culpeper Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Culpeper Stone Company Inc → Culpeper Plant; 1984-05-30 to 1992-04-12; source msha-controller-operator-history
- **controller_controls_mine:** W H  Hurt Jr  et al → Culpeper Plant; 1984-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** W H  Hurt Jr  et al → Culpeper Stone Company Inc; 1984-05-30 to 1992-04-12; source msha-controller-operator-history
- **controller_controls_operator:** A G  Willis Jr  et al → Culpeper Stone Company Inc; 1984-05-30 to 1992-04-12; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Aggregates → Culpeper Plant; 1992-04-13 to 2002-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Aggregates; 1992-04-13 to 2002-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Luck Stone Corporation → Culpeper Plant; 2002-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles S  Luck IV  et al → Luck Stone Corporation; 2002-05-02 to current/open; source msha-controller-operator-history