# Relationship history for MSHA mine 4606419

Current hierarchy: **Stauffer Sam-F Ray Payne → Stauffer Payne Assoc → No 1 Strip**

- 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:** Dirt-Works Inc → No 1 Strip; 1981-10-01 to 1982-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Strawser Bruno → No 1 Strip; 1981-10-01 to 1982-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Strawser Bruno → Dirt-Works Inc; 1981-10-01 to 1982-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Stauffer Payne Assoc → No 1 Strip; 1982-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stauffer Sam-F Ray Payne Et Al → No 1 Strip; 1982-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stauffer Sam-F Ray Payne Et Al → Stauffer Payne Assoc; 1982-04-05 to current/open; source msha-controller-operator-history