# Relationship history for MSHA mine 1515586

Current hierarchy: **Sexton Neal → Sexton Contracting → No 1 Site**

- 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:** Sexton Contracting → No 1 Site; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sexton Neal → No 1 Site; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sexton Neal → Sexton Contracting; 1986-04-01 to current/open; source msha-controller-operator-history