# Relationship history for MSHA mine 4604337

Current hierarchy: **Reading & Bates Corp → Belva Coal Company Inc → No 5-C Mine**

- 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:** Impco-International Mining & Petroleum Co → No 5-C Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Belva Coal Company Inc → No 5-C Mine; 1974-09-30 to 1977-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Impco-International Mining & Petroleum Co → Belva Coal Company Inc; 1974-09-30 to 1977-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Reading & Bates Corp → No 5-C Mine; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Belva Coal Company Inc → No 5-C Mine; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reading & Bates Corp → Belva Coal Company Inc; 1977-04-01 to current/open; source msha-controller-operator-history