# Relationship history for MSHA mine 1516464

Current hierarchy: **Charles  Collins → Calvary Coal Company Inc → Calvary #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Great Western Resources Inc → Calvary #1; 1987-02-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crockett Collieries (Ky) Inc → Calvary #1; 1988-08-01 to 1995-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Great Western Resources Inc → Crockett Collieries (Ky) Inc; 1988-08-01 to 1995-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Collins → Calvary #1; 1992-02-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Good Coal Company → Calvary #1; 1995-09-11 to 1997-06-17; source msha-controller-operator-history
- **controller_controls_mine:** James  Goodwin → Calvary #1; 1995-09-11 to 1997-06-17; source msha-controller-operator-history
- **controller_controls_operator:** James  Goodwin → Good Coal Company; 1995-09-11 to 1997-06-17; source msha-controller-operator-history
- **operator_operates_mine:** Good Coal Company → Calvary #1; 1997-06-18 to 1998-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Stacy → Calvary #1; 1997-06-18 to 1998-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Stacy → Good Coal Company; 1997-06-18 to 1998-08-02; source msha-controller-operator-history
- **operator_operates_mine:** Calvary Coal Company Inc → Calvary #1; 1998-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Collins → Calvary Coal Company Inc; 1998-08-03 to current/open; source msha-controller-operator-history