# Relationship history for MSHA mine 1510150

Current hierarchy: **Taylor Larry → Whitley Sunshine Coal Company → Mine #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:** Alley Gene → Mine #1; 1973-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Whitley Sunshine Coal Company → Mine #1; 1976-12-01 to 1979-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Alley Gene → Whitley Sunshine Coal Company; 1976-12-01 to 1979-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Whitley Sunshine Coal Company → Mine #1; 1979-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Larry → Mine #1; 1979-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Larry → Whitley Sunshine Coal Company; 1979-03-01 to current/open; source msha-controller-operator-history