# Relationship history for MSHA mine 2600464

Current hierarchy: **Craig C  Whiting; Michael T  Huntington → Whiting Huntington, LLC → Nipton Pit**

- 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:** Whiting Brothers Construction Company Inc → Nipton Pit; 1950-01-01 to 1986-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Mark C  Whiting → Nipton Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark C  Whiting → Whiting Brothers Construction Company Inc; 1950-01-01 to 1986-11-11; source msha-controller-operator-history
- **operator_operates_mine:** Whiting Brothers Inc → Nipton Pit; 1986-11-12 to 2003-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Phil M  Whiting et al → Nipton Pit; 1986-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phil M  Whiting et al → Whiting Brothers Inc; 1986-11-12 to 2003-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Whiting Huntington, LLC → Nipton Pit; 2003-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig C  Whiting Et Al → Nipton Pit; 2003-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig C  Whiting Et Al → Whiting Huntington, LLC; 2003-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael T  Huntington Et Al → Whiting Huntington, LLC; 2003-04-02 to current/open; source msha-controller-operator-history