# Relationship history for MSHA mine 0301866

Current hierarchy: **James W  Barfield → Sevier County Aggregates → Sevier County Aggregates**

- 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:** Sevier County Aggregates → Sevier County Aggregates; 2002-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ray  Hunt Et Al → Sevier County Aggregates; 2002-07-16 to 2002-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Hunt Et Al → Sevier County Aggregates; 2002-07-16 to 2002-08-23; source msha-controller-operator-history
- **controller_controls_mine:** James W  Barfield → Sevier County Aggregates; 2002-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James W  Barfield → Sevier County Aggregates; 2002-08-24 to current/open; source msha-controller-operator-history