# Relationship history for MSHA mine 3800753

Current hierarchy: **O L  Thompson → O.L. Thompson Construction Co → Edisto Oaks**

- 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:** O L  Thompson → Edisto Oaks; 1994-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** O.L. Thompson Construction Co → Edisto Oaks; 2019-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** O L  Thompson → O.L. Thompson Construction Co; 2019-06-14 to current/open; source msha-controller-operator-history