# Relationship history for MSHA mine 4608575

Current hierarchy: **Everett Gordon Justice → Ed Coal, Inc. → Skinned Poplar Strip**

- 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:** Donn A  Chickering → Skinned Poplar Strip; 1994-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wyoming Pocahontas Land Company → Skinned Poplar Strip; 1996-05-01 to 2019-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → Wyoming Pocahontas Land Company; 1996-05-01 to 2019-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Everett Gordon Justice → Skinned Poplar Strip; 2006-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amber Lea Contractors LLC → Skinned Poplar Strip; 2019-02-25 to 2021-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Austin B  Kirk et al → Skinned Poplar Strip; 2019-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Austin B  Kirk et al → Amber Lea Contractors LLC; 2019-02-25 to 2021-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Tim B  Young et al → Amber Lea Contractors LLC; 2019-02-25 to 2021-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Ed Coal, Inc. → Skinned Poplar Strip; 2021-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Everett Gordon Justice → Ed Coal, Inc.; 2021-03-24 to current/open; source msha-controller-operator-history