# Relationship history for MSHA mine 4608834

Current hierarchy: **David A  Betscher; Bobby J  Adkins → B & A Excavating Inc → Mine No 1**

- 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:** Howard J  Wells → Mine No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Edmonds Mining Inc → Mine No 1; 2000-05-01 to 2000-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Edmonds → Mine No 1; 2000-05-01 to 2000-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Edmonds → Edmonds Mining Inc; 2000-05-01 to 2000-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Grace Mining Inc → Mine No 1; 2000-06-19 to 2000-09-12; source msha-controller-operator-history
- **controller_controls_mine:** Simpkins Gregory → Mine No 1; 2000-06-19 to 2000-09-12; source msha-controller-operator-history
- **controller_controls_operator:** Simpkins Gregory → Grace Mining Inc; 2000-06-19 to 2000-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Wells Auger Mining Inc → Mine No 1; 2000-09-13 to 2001-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Howard J  Wells → Wells Auger Mining Inc; 2000-09-13 to 2001-03-25; source msha-controller-operator-history
- **operator_operates_mine:** B & A Excavating Inc → Mine No 1; 2001-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David A  Betscher et al → Mine No 1; 2001-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David A  Betscher et al → B & A Excavating Inc; 2001-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby J  Adkins et al → B & A Excavating Inc; 2001-03-26 to current/open; source msha-controller-operator-history