# Relationship history for MSHA mine 1516579

Current hierarchy: **Hogg Don → Dbl 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:** Chambers Coal Company → Mine No 1; 1989-03-01 to 1990-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Hamilton Scottie → Mine No 1; 1989-03-01 to 1990-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Hamilton Scottie → Chambers Coal Company; 1989-03-01 to 1990-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Patty Coal Inc → Mine No 1; 1990-03-08 to 1992-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Goble Rowland → Mine No 1; 1990-03-08 to 1992-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Goble Rowland → Patty Coal Inc; 1990-03-08 to 1992-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Hogg Don → Mine No 1; 1991-10-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dbl Inc → Mine No 1; 1992-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hogg Don → Dbl Inc; 1992-02-18 to current/open; source msha-controller-operator-history