# Relationship history for MSHA mine 4405232

Current hierarchy: **Shelton Donald Lee → Terrie Lynn Coal Company Inc → No 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:** E S Coal Company Inc → No 1; 1979-06-01 to 1980-08-04; source msha-controller-operator-history
- **controller_controls_mine:** Salyers Emory → No 1; 1979-06-01 to 1980-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Emory → E S Coal Company Inc; 1979-06-01 to 1980-08-04; source msha-controller-operator-history
- **operator_operates_mine:** Terrie Lynn Coal Company Inc → No 1; 1980-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shelton Donald Lee → No 1; 1980-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shelton Donald Lee → Terrie Lynn Coal Company Inc; 1980-08-05 to current/open; source msha-controller-operator-history