# Relationship history for MSHA mine 2901855

Current hierarchy: **Hale Embree H Jr → Embree H Hale Jr → Poco A Poco**

- 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:** Ken  Barnett et al → Poco A Poco; 1950-01-01 to 2015-03-30; source msha-controller-operator-history
- **operator_operates_mine:** K Barnett & Sons Inc → Poco A Poco; 1981-02-01 to 1987-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Ken  Barnett et al → K Barnett & Sons Inc; 1981-02-01 to 1987-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Black Range Exploration Inc → Poco A Poco; 1987-05-06 to 1988-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Evatt Rex L Iii → Poco A Poco; 1987-05-06 to 1988-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Evatt Rex L Iii → Black Range Exploration Inc; 1987-05-06 to 1988-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Embree H Hale Jr → Poco A Poco; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hale Embree H Jr → Poco A Poco; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hale Embree H Jr → Embree H Hale Jr; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Eliason et al → Poco A Poco; 2015-03-31 to 2026-01-13; source msha-controller-operator-history
- **controller_controls_operator:** James  Eliason et al → K Barnett & Sons Inc; 2015-03-31 to 1987-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Crawley et al → K Barnett & Sons Inc; 2015-03-31 to 1987-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Bryce  Kidd et al → Poco A Poco; 2026-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryce  Kidd et al → K Barnett & Sons Inc; 2026-01-14 to 1987-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Travis  Cline et al → K Barnett & Sons Inc; 2026-01-14 to 1987-05-05; source msha-controller-operator-history