# Relationship history for MSHA mine 4604320

Current hierarchy: **Henry Paul  Kizer → Amigo Smokeless Coal Company → Amigo No 3 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Pittston Company → Amigo No 3 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amigo Smokeless Coal Company → Amigo No 3 Mine; 1974-10-31 to 1980-08-21; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Amigo Smokeless Coal Company; 1974-10-31 to 1980-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Stepp Gale B → Amigo No 3 Mine; 1977-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine Tree Coal Company → Amigo No 3 Mine; 1980-08-22 to 1986-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Stepp Gale B → Pine Tree Coal Company; 1980-08-22 to 1986-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Amigo Smokeless Coal Company → Amigo No 3 Mine; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Henry Paul  Kizer et al → Amigo No 3 Mine; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry Paul  Kizer et al → Amigo Smokeless Coal Company; 1986-12-01 to current/open; source msha-controller-operator-history