# Relationship history for MSHA mine 4605272

Current hierarchy: **Frye Charles E → Shireton Company → Mine 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:** Cherokee Solid Fuels Inc → Mine No 1; 1976-08-01 to 1978-01-24; source msha-controller-operator-history
- **controller_controls_mine:** Hatfield Tennis R → Mine No 1; 1976-08-01 to 1978-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Hatfield Tennis R → Cherokee Solid Fuels Inc; 1976-08-01 to 1978-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Shireton Company → Mine No 1; 1978-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frye Charles E → Mine No 1; 1978-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frye Charles E → Shireton Company; 1978-01-25 to current/open; source msha-controller-operator-history