# Relationship history for MSHA mine 4002105

Current hierarchy: **Muse Charles O--Venis Anderson → Barley Branch Mining → 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

- **operator_operates_mine:** B & L Coal Company → No 1; 1976-08-01 to 1977-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Brumette Floyd A & Robert T Lamb → No 1; 1976-08-01 to 1977-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Brumette Floyd A & Robert T Lamb → B & L Coal Company; 1976-08-01 to 1977-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Larry & Michael L Et Al → No 1; 1977-01-12 to 1981-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Coal Company → No 1; 1977-09-01 to 1981-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Larry & Michael L Et Al → Johnson Coal Company; 1977-09-01 to 1981-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Bolton Mining Company → No 1; 1981-08-04 to 1984-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Bolton Howard → No 1; 1981-08-04 to 1984-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Bolton Howard → Bolton Mining Company; 1981-08-04 to 1984-03-11; source msha-controller-operator-history
- **operator_operates_mine:** Barley Branch Mining → No 1; 1984-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Muse Charles O--Venis Anderson Et Al → No 1; 1984-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Muse Charles O--Venis Anderson Et Al → Barley Branch Mining; 1984-03-12 to current/open; source msha-controller-operator-history