# Relationship history for MSHA mine 4605588

Current hierarchy: **Consolidated Energy Systems Of Maryland Inc → Maidsville Coal Mining Partnership → Barbour County Job**

- 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:** Laurita Trucking & Excavating Company Inc → Barbour County Job; 1977-08-01 to 1978-03-13; source msha-controller-operator-history
- **controller_controls_mine:** James L  Laurita → Barbour County Job; 1977-08-01 to 1978-03-13; source msha-controller-operator-history
- **controller_controls_operator:** James L  Laurita → Laurita Trucking & Excavating Company Inc; 1977-08-01 to 1978-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Maidsville Coal Mining Partnership → Barbour County Job; 1978-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Consolidated Energy Systems Of Maryland Inc → Barbour County Job; 1978-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Consolidated Energy Systems Of Maryland Inc → Maidsville Coal Mining Partnership; 1978-03-14 to current/open; source msha-controller-operator-history