# Relationship history for MSHA mine 0501014

Current hierarchy: **Mc Connell Lee W → Precision Cast Structures Inc → P C S Greeley Pit**

- 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:** Ramsour Brothers Inc → P C S Greeley Pit; 1950-01-01 to 1984-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Glen R  Ramsour → P C S Greeley Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glen R  Ramsour → Ramsour Brothers Inc; 1950-01-01 to 1984-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Greeley Excavation Company → P C S Greeley Pit; 1984-03-27 to 1989-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Leone John C → P C S Greeley Pit; 1984-03-27 to 1989-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Leone John C → Greeley Excavation Company; 1984-03-27 to 1989-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Precision Cast Structures Inc → P C S Greeley Pit; 1989-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Connell Lee W → P C S Greeley Pit; 1989-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Connell Lee W → Precision Cast Structures Inc; 1989-09-01 to current/open; source msha-controller-operator-history