# Relationship history for MSHA mine 3607388

Current hierarchy: **Lytle William F Jr → Greenwood Mining → No 1 Slope**

- 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:** Twin Oaks Coal Company → No 1 Slope; 1982-10-01 to 1985-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Allen Robert Et Al → No 1 Slope; 1982-10-01 to 1985-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Allen Robert Et Al → Twin Oaks Coal Company; 1982-10-01 to 1985-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Greenwood Mining → No 1 Slope; 1985-07-08 to 1986-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Yost William S → No 1 Slope; 1985-07-08 to 1986-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Yost William S → Greenwood Mining; 1985-07-08 to 1986-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Greenwood Mining → No 1 Slope; 1986-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lytle William F Jr Et Al → No 1 Slope; 1986-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lytle William F Jr Et Al → Greenwood Mining; 1986-03-17 to current/open; source msha-controller-operator-history