# Relationship history for MSHA mine 1800588

Current hierarchy: **Redland Plc → Genstar Stone Products Company → Davidsonville 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Davidsonville Eastern Aggregates → Davidsonville Plant; 1950-01-01 to 1986-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Owens John E → Davidsonville Plant; 1950-01-01 to 1986-01-23; source msha-controller-operator-history
- **controller_controls_operator:** Owens John E → Davidsonville Eastern Aggregates; 1950-01-01 to 1986-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Cimenteries Cbr Cementbedrijven → Davidsonville Plant; 1980-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Genstar Stone Products Company → Davidsonville Plant; 1986-01-24 to 1986-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Cimenteries Cbr Cementbedrijven → Genstar Stone Products Company; 1986-01-24 to 1986-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Genstar Stone Products Company → Davidsonville Plant; 1986-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → Davidsonville Plant; 1986-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Genstar Stone Products Company; 1986-11-04 to current/open; source msha-controller-operator-history