# Relationship history for MSHA mine 4407281

Current hierarchy: **Ramaco Resources Inc → Ramaco Resources Land Holdings, LLC → Kennedy #3 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:** Massey Energy Company → Kennedy #3 Surface; 1997-08-26 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Knox Creek Coal Corp → Kennedy #3 Surface; 2011-02-23 to 2016-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Knox Creek Coal Corp; 2011-02-23 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Kennedy #3 Surface; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Knox Creek Coal Corp; 2011-06-01 to 2016-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Michael D Bauersachs → Kennedy #3 Surface; 2016-07-01 to 2016-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Ramaco Resources Land Holdings, LLC → Kennedy #3 Surface; 2016-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael D Bauersachs → Ramaco Resources Land Holdings, LLC; 2016-07-14 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Ramaco Resources Inc → Kennedy #3 Surface; 2017-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ramaco Resources Inc → Ramaco Resources Land Holdings, LLC; 2017-01-01 to current/open; source msha-controller-operator-history