# Relationship history for MSHA mine 1513511

Current hierarchy: **Gentry Eugene-Sam Whitt → G & W Construction Company → Strip #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:** G & W Construction Company → Strip #1; 1982-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gentry Eugene-Sam Whitt Et Al → Strip #1; 1982-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gentry Eugene-Sam Whitt Et Al → G & W Construction Company; 1982-05-01 to current/open; source msha-controller-operator-history