# Relationship history for MSHA mine 1511887

Current hierarchy: **Iracoal Incorporated → Lodestar Energy Incorporated → Caseyville Dock**

- 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:** Costain Group PLC → Caseyville Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pyro Energy Corp → Caseyville Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pyro Mining Company → Caseyville Dock; 1979-07-01 to 1982-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Pyro Energy Corp → Pyro Mining Company; 1979-07-01 to 1982-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Costain Coal Inc → Caseyville Dock; 1982-01-25 to 1997-07-20; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Costain Coal Inc; 1982-01-25 to 1997-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Iracoal Incorporated → Caseyville Dock; 1997-01-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lodestar Energy Incorporated → Caseyville Dock; 1997-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Iracoal Incorporated → Lodestar Energy Incorporated; 1997-07-21 to current/open; source msha-controller-operator-history