# Relationship history for MSHA mine 1510410

Current hierarchy: **Collier James--James Hall & James Sizemore → Collier 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Lewis Lonnie B & Estill Blair → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lonnie Lewis Coal Company Inc → No 1 Mine; 1977-05-01 to 1977-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Lewis Lonnie B & Estill Blair → Lonnie Lewis Coal Company Inc; 1977-05-01 to 1977-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Collier Coal Company → No 1 Mine; 1977-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Collier James--James Hall & James Sizemore → No 1 Mine; 1977-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Collier James--James Hall & James Sizemore → Collier Coal Company; 1977-12-14 to current/open; source msha-controller-operator-history