# Relationship history for MSHA mine 1511060

Current hierarchy: **Pamela J  Allen → P B & C Energy Inc → 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:** Co-Op Mining Company → No 2; 1978-02-01 to 1980-08-07; source msha-controller-operator-history
- **controller_controls_mine:** Barnett Bernard H → No 2; 1978-02-01 to 1980-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Barnett Bernard H → Co-Op Mining Company; 1978-02-01 to 1980-08-07; source msha-controller-operator-history
- **operator_operates_mine:** Old Style Mining Company Inc → No 2; 1980-08-08 to 1981-09-28; source msha-controller-operator-history
- **controller_controls_mine:** Horn Donald R → No 2; 1980-08-08 to 1981-09-28; source msha-controller-operator-history
- **controller_controls_operator:** Horn Donald R → Old Style Mining Company Inc; 1980-08-08 to 1981-09-28; source msha-controller-operator-history
- **operator_operates_mine:** Bush & Burchett Inc → No 2; 1981-09-29 to 1984-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Burchett Joseph → No 2; 1981-09-29 to 1984-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Burchett Joseph → Bush & Burchett Inc; 1981-09-29 to 1984-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Uptown Mining Corp → No 2; 1984-08-13 to 1989-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Clifton J W → No 2; 1984-08-13 to 1989-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Clifton J W → Uptown Mining Corp; 1984-08-13 to 1989-06-06; source msha-controller-operator-history
- **operator_operates_mine:** Courtney-Cory Collieries Inc → No 2; 1989-06-07 to 1992-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Branham Gary A → No 2; 1989-06-07 to 1992-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Branham Gary A → Courtney-Cory Collieries Inc; 1989-06-07 to 1992-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Pamela J  Allen → No 2; 1991-02-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** P B & C Energy Inc → No 2; 1992-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pamela J  Allen → P B & C Energy Inc; 1992-01-14 to current/open; source msha-controller-operator-history