# Relationship history for MSHA mine 1512892

Current hierarchy: **Bradley Equipment Company Inc → C R S Energy Inc → Crs No 2**

- 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:** Cindall Coal Company Inc → Crs No 2; 1981-05-01 to 1984-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Napier Clayton & Paul Hensley → Crs No 2; 1981-05-01 to 1984-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Napier Clayton & Paul Hensley → Cindall Coal Company Inc; 1981-05-01 to 1984-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Bradley Equipment Company Inc → Crs No 2; 1983-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C R S Energy Inc → Crs No 2; 1984-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley Equipment Company Inc → C R S Energy Inc; 1984-04-20 to current/open; source msha-controller-operator-history