# Relationship history for MSHA mine 4605426

Current hierarchy: **Toler Floyd D → High Quality Coal Packing Company Inc → Perry Branch 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:** Venable & Billups Corp → Perry Branch Mine; 1977-02-01 to 1981-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Venable James T → Perry Branch Mine; 1977-02-01 to 1981-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Venable James T → Venable & Billups Corp; 1977-02-01 to 1981-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Corvette Coal Company → Perry Branch Mine; 1981-04-22 to 1983-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Moffitt Earl E → Perry Branch Mine; 1981-04-22 to 1984-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Moffitt Earl E → Corvette Coal Company; 1981-04-22 to 1983-07-21; source msha-controller-operator-history
- **operator_operates_mine:** High Quality Coal Packing Company Inc → Perry Branch Mine; 1983-07-22 to 1984-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Toler Floyd D → Perry Branch Mine; 1983-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Toler Floyd D → High Quality Coal Packing Company Inc; 1983-07-22 to 1984-04-09; source msha-controller-operator-history
- **operator_operates_mine:** Corvette Coal Company → Perry Branch Mine; 1984-04-10 to 1984-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Moffitt Earl E → Corvette Coal Company; 1984-04-10 to 1984-06-27; source msha-controller-operator-history
- **operator_operates_mine:** High Quality Coal Packing Company Inc → Perry Branch Mine; 1984-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Toler Floyd D → High Quality Coal Packing Company Inc; 1984-06-28 to current/open; source msha-controller-operator-history