# Relationship history for MSHA mine 1513359

Current hierarchy: **Darrell  Wagner → Four Aces Mining Inc → Mine #4a**

- 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

- **controller_controls_mine:** Bow Valley Industries Ltd → Mine #4a; 1980-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bow Valley Coal (Ky) Inc → Mine #4a; 1982-02-01 to 1983-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Bow Valley Industries Ltd → Bow Valley Coal (Ky) Inc; 1982-02-01 to 1983-06-01; source msha-controller-operator-history
- **operator_operates_mine:** V & W Coal Company Inc → Mine #4a; 1983-06-02 to 1984-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Vandagriff Glen Doil → Mine #4a; 1983-06-02 to 1984-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Vandagriff Glen Doil → V & W Coal Company Inc; 1983-06-02 to 1984-08-02; source msha-controller-operator-history
- **operator_operates_mine:** V & W Coal Company Inc → Mine #4a; 1984-08-03 to 1984-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Williams Paul F → Mine #4a; 1984-08-03 to 1984-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Williams Paul F → V & W Coal Company Inc; 1984-08-03 to 1984-12-20; source msha-controller-operator-history
- **operator_operates_mine:** Walker Coal Company Inc → Mine #4a; 1984-12-21 to 1990-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Ellis Danny R → Mine #4a; 1984-12-21 to 1990-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Ellis Danny R → Walker Coal Company Inc; 1984-12-21 to 1990-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Darrell  Wagner → Mine #4a; 1986-04-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Four Aces Mining Inc → Mine #4a; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Wagner → Four Aces Mining Inc; 1990-03-01 to current/open; source msha-controller-operator-history