# Relationship history for MSHA mine 1509910

Current hierarchy: **Susie A  Smith; Elmer  Fuller → A B & J Coal Company 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:** Bowling Charles D Et Al → Mine No 1; 1973-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kiser Jimmy → Mine No 1; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Debbie Carol Coal Company → Mine No 1; 1976-08-01 to 1977-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Roy D & James K--Thomas J Tabor → Mine No 1; 1976-08-01 to 1977-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Roy D & James K--Thomas J Tabor → Debbie Carol Coal Company; 1976-08-01 to 1977-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Crystal Coal Company → Mine No 1; 1977-03-03 to 1986-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Bowling Charles D Et Al → Crystal Coal Company; 1977-03-03 to 1986-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Kiser Brothers Coal Company Inc → Mine No 1; 1986-09-16 to 1994-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Kiser Jimmy → Kiser Brothers Coal Company Inc; 1986-09-16 to 1994-09-05; source msha-controller-operator-history
- **operator_operates_mine:** A B & J Coal Company Inc → Mine No 1; 1994-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Susie A  Smith et al → Mine No 1; 1994-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susie A  Smith et al → A B & J Coal Company Inc; 1994-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmer  Fuller et al → A B & J Coal Company Inc; 1994-09-06 to current/open; source msha-controller-operator-history