# Relationship history for MSHA mine 3301070

Current hierarchy: **ACNR Holdings, Inc → Belmont County Coal Resources, Inc. → Century 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:** Youghiogheny & Ohio Coal Company → Century Mine; 1950-01-01 to 2000-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Panhandle Eastern Corp → Century Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Panhandle Eastern Corp → Youghiogheny & Ohio Coal Company; 1950-01-01 to 2000-11-05; source msha-controller-operator-history
- **operator_operates_mine:** American Energy Corporation → Century Mine; 2000-11-06 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Century Mine; 2000-11-06 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → American Energy Corporation; 2000-11-06 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** ACNR Holdings, Inc → Century Mine; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → American Energy Corporation; 2020-09-17 to 2020-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Belmont County Coal Resources, Inc. → Century Mine; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → Belmont County Coal Resources, Inc.; 2020-09-17 to current/open; source msha-controller-operator-history