# Relationship history for MSHA mine 4604510

Current hierarchy: **Freeman  Lambert → Indian Creek Coal Company → No 1 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Indian Creek Coal Company → No 1 Mine; 1975-01-01 to 1976-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Graybeal Carl N Et Al → No 1 Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Graybeal Carl N Et Al → Indian Creek Coal Company; 1975-01-01 to 1976-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Indian Creek Coal Company → No 1 Mine; 1976-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Freeman  Lambert → No 1 Mine; 1976-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Freeman  Lambert → Indian Creek Coal Company; 1976-10-14 to current/open; source msha-controller-operator-history