# Relationship history for MSHA mine 1513274

Current hierarchy: **Frazier Robert B → Beaver Mining Inc → No 1**

- 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:** El Paso Energy Corp → No 1; 1980-10-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Caney Coal Company → No 1; 1981-12-01 to 1984-06-06; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Mc Coy Caney Coal Company; 1981-12-01 to 1984-06-06; source msha-controller-operator-history
- **operator_operates_mine:** Dog Fork Coal Company Inc → No 1; 1984-06-07 to 1984-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Fields Mason & Larry Ratliff → No 1; 1984-06-07 to 1984-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Fields Mason & Larry Ratliff → Dog Fork Coal Company Inc; 1984-06-07 to 1984-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Caney Coal Company → No 1; 1984-11-09 to 1986-11-09; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Mc Coy Caney Coal Company; 1984-11-09 to 1986-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Zephyer Coal Company Inc → No 1; 1986-11-10 to 1989-02-14; source msha-controller-operator-history
- **controller_controls_mine:** James A  Comyns → No 1; 1986-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Comyns → Zephyer Coal Company Inc; 1986-11-10 to 1989-02-14; source msha-controller-operator-history
- **controller_controls_mine:** B W  McDonald → No 1; 1988-10-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Colonial Coal Company Inc → No 1; 1989-02-15 to 1989-10-18; source msha-controller-operator-history
- **controller_controls_operator:** B W  McDonald → Colonial Coal Company Inc; 1989-02-15 to 1989-10-18; source msha-controller-operator-history
- **operator_operates_mine:** Beaver Mining Inc → No 1; 1989-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frazier Robert B → No 1; 1989-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frazier Robert B → Beaver Mining Inc; 1989-10-19 to current/open; source msha-controller-operator-history