# Relationship history for MSHA mine 3601793

Current hierarchy: **Petersville Sleigh Ltd → Birnen Coal Company Inc → Birnen Coal Company Incorporated**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Blue Bell Enterprises → Birnen Coal Company Incorporated; 1950-01-01 to 1976-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Butcavage John W → Birnen Coal Company Incorporated; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Butcavage John W → Blue Bell Enterprises; 1950-01-01 to 1976-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Breslin John → Birnen Coal Company Incorporated; 1976-10-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Con Eng Coal Corp Inc → Birnen Coal Company Incorporated; 1976-12-07 to 1977-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Breslin John → Con Eng Coal Corp Inc; 1976-12-07 to 1977-02-22; source msha-controller-operator-history
- **operator_operates_mine:** Birnen Coal Company Inc → Birnen Coal Company Incorporated; 1977-02-23 to 1980-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Mucklow Russell → Birnen Coal Company Incorporated; 1977-02-23 to 1980-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Mucklow Russell → Birnen Coal Company Inc; 1977-02-23 to 1980-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Petersville Sleigh Ltd Et Al → Birnen Coal Company Incorporated; 1980-07-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Birnen Coal Company Inc → Birnen Coal Company Incorporated; 1980-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Petersville Sleigh Ltd Et Al → Birnen Coal Company Inc; 1980-07-11 to current/open; source msha-controller-operator-history