# Relationship history for MSHA mine 1505387

Current hierarchy: **Cyprus Amax Minerals Company → Brownies Creek Collieries Inc → Mathel Mine**

- 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:** Mathel Coal Company Inc → Mathel Mine; 1950-01-01 to 1976-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Collette Fred → Mathel Mine; 1950-01-01 to 1976-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Collette Fred → Mathel Coal Company Inc; 1950-01-01 to 1976-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Mathel Coal Company Inc → Mathel Mine; 1976-04-08 to 1976-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Wilder Hugh → Mathel Mine; 1976-04-08 to 1976-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Wilder Hugh → Mathel Coal Company Inc; 1976-04-08 to 1976-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Brownies Creek Collieries Inc → Mathel Mine; 1976-08-01 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Harbert Construction Corp → Mathel Mine; 1976-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harbert Construction Corp → Brownies Creek Collieries Inc; 1976-08-01 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Mathel Mine; 1981-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brownies Creek Collieries Inc → Mathel Mine; 1981-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Brownies Creek Collieries Inc; 1981-09-15 to current/open; source msha-controller-operator-history