# Relationship history for MSHA mine 1505496

Current hierarchy: **Tolliver Wilma → M T S Leasing Inc → Amanda 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

- **operator_operates_mine:** L & L Coal Company → Amanda No 1 Mine; 1950-01-01 to 1974-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Sexton Landon & Lenville → Amanda No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sexton Landon & Lenville → L & L Coal Company; 1950-01-01 to 1974-06-05; source msha-controller-operator-history
- **operator_operates_mine:** M T S Leasing Inc → Amanda No 1 Mine; 1974-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tolliver Wilma → Amanda No 1 Mine; 1974-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tolliver Wilma → M T S Leasing Inc; 1974-06-06 to current/open; source msha-controller-operator-history