# Relationship history for MSHA mine 4407162

Current hierarchy: **Ramaco Resources Inc → Ramaco Resources Land Holdings, LLC → Big Creek Surface**

- 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:** Kenneth L  Stacy → Big Creek Surface; 2001-08-01 to 2006-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Surface Minerals Company → Big Creek Surface; 2006-02-10 to 2008-05-20; source msha-controller-operator-history
- **controller_controls_mine:** United  Company → Big Creek Surface; 2006-02-10 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Surface Minerals Company; 2006-02-10 to 2008-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Stacy → Surface Minerals Company; 2006-02-10 to 2006-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Terry T  McGaffee → Big Creek Surface; 2008-02-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Excavating Company LLC → Big Creek Surface; 2008-05-21 to 2011-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Terry T  McGaffee → Mountain Excavating Company LLC; 2008-05-21 to 2011-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Metinvest B V → Big Creek Surface; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Metinvest B V → Surface Minerals Company; 2009-04-30 to 2008-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Omega Surface Mining, LLC → Big Creek Surface; 2011-08-24 to 2020-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Omega Holdings LLC → Big Creek Surface; 2011-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Omega Holdings LLC → Omega Surface Mining, LLC; 2011-08-24 to 2020-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Michael D Bauersachs → Big Creek Surface; 2016-07-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Ramaco Resources Inc → Big Creek Surface; 2017-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ramaco Resources Land Holdings, LLC → Big Creek Surface; 2020-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael D Bauersachs → Ramaco Resources Land Holdings, LLC; 2020-08-06 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Ramaco Resources Inc → Ramaco Resources Land Holdings, LLC; 2020-08-06 to current/open; source msha-controller-operator-history