# Relationship history for MSHA mine 1515859

Current hierarchy: **John  Harris → Bull Creek Coal Corporation → Mine #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Circle A & G Coal Company Inc → Mine #1; 1986-12-01 to 1993-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Ward Glen → Mine #1; 1986-12-01 to 1993-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Ward Glen → Circle A & G Coal Company Inc; 1986-12-01 to 1993-07-18; source msha-controller-operator-history
- **controller_controls_mine:** John  Harris → Mine #1; 1992-10-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & S Coal Inc → Mine #1; 1993-07-19 to 1994-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Stewart Benjie → Mine #1; 1993-07-19 to 1994-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Stewart Benjie → B & S Coal Inc; 1993-07-19 to 1994-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Bull Creek Coal Corporation → Mine #1; 1994-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Harris → Bull Creek Coal Corporation; 1994-03-03 to current/open; source msha-controller-operator-history