# Relationship history for MSHA mine 1516812

Current hierarchy: **Metinvest B V → Sapphire Coal Company → Buck Creek No. 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

- **controller_controls_mine:** Ricky D  Kirk  et al → Buck Creek No. 1; 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William B  Sturgill → Buck Creek No. 1; 1987-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Elk Creek Coal Company Inc → Buck Creek No. 1; 1990-01-01 to 1990-12-09; source msha-controller-operator-history
- **controller_controls_operator:** William B  Sturgill → Big Elk Creek Coal Company Inc; 1990-01-01 to 1990-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Poley Coal Corp → Buck Creek No. 1; 1990-12-10 to 2000-01-27; source msha-controller-operator-history
- **controller_controls_mine:** William K  Ison et al → Buck Creek No. 1; 1990-12-10 to 2000-01-27; source msha-controller-operator-history
- **controller_controls_operator:** William K  Ison et al → Poley Coal Corp; 1990-12-10 to 2000-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Carbon River Coal Corp → Buck Creek No. 1; 2000-01-28 to 2003-12-16; source msha-controller-operator-history
- **controller_controls_operator:** Ricky D  Kirk  et al → Carbon River Coal Corp; 2000-01-28 to 2003-12-16; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Wells Jr  et al → Carbon River Coal Corp; 2000-01-28 to 2003-12-16; source msha-controller-operator-history
- **controller_controls_mine:** Randy A  Cook et al → Buck Creek No. 1; 2000-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sapphire Mining, Inc. → Buck Creek No. 1; 2003-12-17 to 2004-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Randy A  Cook et al → Sapphire Mining, Inc.; 2003-12-17 to 2004-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Michael K  Cook et al → Sapphire Mining, Inc.; 2003-12-17 to 2004-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Coal Extraction LLC → Buck Creek No. 1; 2004-04-26 to 2004-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth L  Stacy → Buck Creek No. 1; 2004-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Stacy → Coal Extraction LLC; 2004-04-26 to 2004-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Sapphire Coal Company → Buck Creek No. 1; 2004-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** United  Company → Buck Creek No. 1; 2004-11-15 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Sapphire Coal Company; 2004-11-15 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Metinvest B V → Buck Creek No. 1; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Metinvest B V → Sapphire Coal Company; 2009-04-30 to current/open; source msha-controller-operator-history