# Relationship history for MSHA mine 4405236

Current hierarchy: **Ramaco Resources Inc → Ramaco Resources Land Holdings, LLC → Coal Creek Prep 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:** E H  Lester → Coal Creek Prep Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sandy Ridge Energy Corp → Coal Creek Prep Plant; 1979-06-01 to 1980-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Republic Steel Corp → Coal Creek Prep Plant; 1979-06-01 to 1980-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Republic Steel Corp → Sandy Ridge Energy Corp; 1979-06-01 to 1980-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Knox Creek Coal Corp → Coal Creek Prep Plant; 1980-07-30 to 1985-09-30; source msha-controller-operator-history
- **controller_controls_operator:** E H  Lester → Knox Creek Coal Corp; 1980-07-30 to 1985-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Knox Creek Coal Corp → Coal Creek Prep Plant; 1985-10-01 to 1987-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Coal Creek Prep Plant; 1985-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Knox Creek Coal Corp; 1985-10-01 to 1987-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Knox Creek Coal Corp → Coal Creek Prep Plant; 1987-04-16 to 1997-08-25; source msha-controller-operator-history
- **controller_controls_mine:** United  Company → Coal Creek Prep Plant; 1987-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Knox Creek Coal Corp; 1987-04-16 to 1997-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Knox Creek Coal Corporation → Coal Creek Prep Plant; 1997-08-26 to 2016-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Coal Creek Prep Plant; 1997-08-26 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Knox Creek Coal Corporation; 1997-08-26 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Coal Creek Prep Plant; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Knox Creek Coal Corporation; 2011-06-01 to 2016-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Ramaco Resources Land Holdings, LLC → Coal Creek Prep Plant; 2016-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael D Bauersachs → Coal Creek Prep Plant; 2016-07-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael D Bauersachs → Ramaco Resources Land Holdings, LLC; 2016-07-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Ramaco Resources Inc → Coal Creek Prep Plant; 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