# Relationship history for MSHA mine 4605449

Current hierarchy: **Ramaco Resources Inc → Ramaco Resources, LLC → Berwind Preparation Plant**

- 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:** CONSOL Energy Inc → Berwind Preparation Plant; 1950-01-01 to 2013-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Consolidation Coal Company → Berwind Preparation Plant; 1977-03-01 to 2013-12-05; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Consolidation Coal Company; 1977-03-01 to 2013-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Michael D Bauersachs → Berwind Preparation Plant; 2012-04-27 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Berwind Preparation Plant; 2013-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Consolidation Coal Company; 2013-12-05 to 2013-12-05; source msha-controller-operator-history
- **operator_operates_mine:** CONSOL Amonate Facility LLC → Berwind Preparation Plant; 2013-12-06 to 2017-09-04; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Berwind Preparation Plant; 2013-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → CONSOL Amonate Facility LLC; 2013-12-06 to 2017-09-04; source msha-controller-operator-history
- **controller_controls_mine:** Coronado Coal LLC → Berwind Preparation Plant; 2016-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ramaco Resources Inc → Berwind Preparation Plant; 2017-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Buchanan Minerals, LLC → Berwind Preparation Plant; 2017-09-05 to 2021-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Coronado Coal LLC → Buchanan Minerals, LLC; 2017-09-05 to 2021-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Ramaco Resources, LLC → Berwind Preparation Plant; 2021-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael D Bauersachs → Ramaco Resources, LLC; 2021-12-03 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Ramaco Resources Inc → Ramaco Resources, LLC; 2021-12-03 to current/open; source msha-controller-operator-history