# Relationship history for MSHA mine 4604291

Current hierarchy: **Hirbuck Hiram B → Claytex Coal Company Inc → Claytex 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:** Five Block Coal Company → Claytex No 1; 1974-08-27 to 1976-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Bailes Harold → Claytex No 1; 1974-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bailes Harold → Five Block Coal Company; 1974-08-27 to 1976-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Claytex Coal Company Inc → Claytex No 1; 1976-11-01 to 1977-04-24; source msha-controller-operator-history
- **controller_controls_mine:** Barber Timothy N → Claytex No 1; 1976-11-01 to 1977-04-24; source msha-controller-operator-history
- **controller_controls_operator:** Barber Timothy N → Claytex Coal Company Inc; 1976-11-01 to 1977-04-24; source msha-controller-operator-history
- **operator_operates_mine:** Claytex Coal Company Inc → Claytex No 1; 1977-04-25 to 1978-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Dempsey Jack A → Claytex No 1; 1977-04-25 to 1978-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Dempsey Jack A → Claytex Coal Company Inc; 1977-04-25 to 1978-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Claytex Coal Company Inc → Claytex No 1; 1978-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hirbuck Hiram B → Claytex No 1; 1978-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hirbuck Hiram B → Claytex Coal Company Inc; 1978-03-06 to current/open; source msha-controller-operator-history