# Relationship history for MSHA mine 2200646

Current hierarchy: **Anthony L  King → AKT MATERIALS, INC. → KING 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:** AKT MATERIALS, INC. → KING PIT; 1992-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anthony L  King → KING PIT; 1992-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony L  King → AKT MATERIALS, INC.; 1992-12-01 to current/open; source msha-controller-operator-history