# Relationship history for MSHA mine 4405333

Current hierarchy: **Elkins William R-Hursel H → Elkins Energy Corp → No 10a**

- 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:** Hurshel  Bowers et al → No 10a; 1977-09-19 to 1981-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Roberts Thomas W Et Al → No 10a; 1978-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Flat Gap Mining Company Inc → No 10a; 1979-11-01 to 1980-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Hurshel  Bowers et al → Flat Gap Mining Company Inc; 1979-11-01 to 1980-12-11; source msha-controller-operator-history
- **controller_controls_mine:** Elkins William R-Hursel H Et Al → No 10a; 1980-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Roberts & Bennett Mining → No 10a; 1980-12-12 to 1981-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Roberts Thomas W Et Al → Roberts & Bennett Mining; 1980-12-12 to 1981-08-04; source msha-controller-operator-history
- **operator_operates_mine:** Elkins Energy Corp → No 10a; 1981-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elkins William R-Hursel H Et Al → Elkins Energy Corp; 1981-08-05 to current/open; source msha-controller-operator-history