# Relationship history for MSHA mine 1514422

Current hierarchy: **Great Western Resources Inc → Crockett Collieries (Ky) Inc → Mine #4**

- 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:** Vandagriff Glen Doil → Mine #4; 1983-06-02 to 1984-08-02; source msha-controller-operator-history
- **operator_operates_mine:** V & W Coal Company Inc → Mine #4; 1984-01-01 to 1984-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Vandagriff Glen Doil → V & W Coal Company Inc; 1984-01-01 to 1984-08-02; source msha-controller-operator-history
- **operator_operates_mine:** V & W Coal Company Inc → Mine #4; 1984-08-03 to 1984-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Williams Paul F → Mine #4; 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 #4; 1984-12-21 to 1990-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Ellis Danny R → Mine #4; 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 #4; 1986-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Great Western Resources Inc → Mine #4; 1987-02-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Four Aces Mining Inc → Mine #4; 1990-03-01 to 1995-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Wagner → Four Aces Mining Inc; 1990-03-01 to 1995-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Crockett Collieries (Ky) Inc → Mine #4; 1995-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Great Western Resources Inc → Crockett Collieries (Ky) Inc; 1995-04-01 to current/open; source msha-controller-operator-history