# Relationship history for MSHA mine 1507350

Current hierarchy: **Asbury Harold F → Denco 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

- **operator_operates_mine:** Childs Creek Coal Company → Mine No 1; 1974-01-01 to 1975-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Flannary Curtis & Robert S Jones → Mine No 1; 1974-01-01 to 1975-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Flannary Curtis & Robert S Jones → Childs Creek Coal Company; 1974-01-01 to 1975-11-02; source msha-controller-operator-history
- **operator_operates_mine:** J & F Coals Inc → Mine No 1; 1975-11-03 to 1984-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Flannary Curtis & Harold Jones → Mine No 1; 1975-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Flannary Curtis & Harold Jones → J & F Coals Inc; 1975-11-03 to 1984-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Amvest Corporation → Mine No 1; 1981-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky Darby Coal Company Inc → Mine No 1; 1984-07-11 to 1986-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Elkins Charles C & Wm R--Roger Sutherland Et Al → Mine No 1; 1984-07-11 to 1986-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Elkins Charles C & Wm R--Roger Sutherland Et Al → Kentucky Darby Coal Company Inc; 1984-07-11 to 1986-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Laran Coal Company Inc → Mine No 1; 1986-01-15 to 1986-11-12; source msha-controller-operator-history
- **controller_controls_mine:** Napier Clarence R Jr → Mine No 1; 1986-01-15 to 1988-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Napier Clarence R Jr → Laran Coal Company Inc; 1986-01-15 to 1986-11-12; source msha-controller-operator-history
- **operator_operates_mine:** Powell Mountain Coal Company Inc → Mine No 1; 1986-11-13 to 1989-12-28; source msha-controller-operator-history
- **controller_controls_operator:** Amvest Corporation → Powell Mountain Coal Company Inc; 1986-11-13 to 1989-12-28; source msha-controller-operator-history
- **operator_operates_mine:** Denco Inc → Mine No 1; 1989-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Harold F Et Al → Mine No 1; 1989-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Harold F Et Al → Denco Inc; 1989-12-29 to current/open; source msha-controller-operator-history