# Relationship history for MSHA mine 4403715

Current hierarchy: **Ridings Billy Joe → Stacy Mining 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:** Lanningham W L → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lanningham W L & Royce Moore → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lanningham Coal Company → No 1 Mine; 1974-01-01 to 1974-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Lanningham W L → Lanningham Coal Company; 1974-01-01 to 1974-07-31; source msha-controller-operator-history
- **operator_operates_mine:** L & M Coal Corp → No 1 Mine; 1974-08-01 to 1978-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Lanningham W L & Royce Moore → L & M Coal Corp; 1974-08-01 to 1978-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Harber & Muse Coal Company Inc → No 1 Mine; 1978-06-26 to 1981-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Harber Carl → No 1 Mine; 1978-06-26 to 1981-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Harber Carl → Harber & Muse Coal Company Inc; 1978-06-26 to 1981-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Stacy Mining Company → No 1 Mine; 1981-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ridings Billy Joe Et Al → No 1 Mine; 1981-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ridings Billy Joe Et Al → Stacy Mining Company; 1981-04-20 to current/open; source msha-controller-operator-history