# Relationship history for MSHA mine 3606296

Current hierarchy: **Kukuk Jack → K & T Coal Company → No 3 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:** K & T Coal Company → No 3 Slope; 1976-12-01 to 1977-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Tobin Allen & Randy--Jack Kukuk → No 3 Slope; 1976-12-01 to 1977-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Tobin Allen & Randy--Jack Kukuk → K & T Coal Company; 1976-12-01 to 1977-07-14; source msha-controller-operator-history
- **operator_operates_mine:** K & T Coal Company → No 3 Slope; 1977-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kukuk Jack Et Al → No 3 Slope; 1977-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kukuk Jack Et Al → K & T Coal Company; 1977-07-15 to current/open; source msha-controller-operator-history