# Relationship history for MSHA mine 0405190

Current hierarchy: **Walter  Koenig; Christian  Koenig → Asta Construction Company Inc → McCormick 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:** Asta Construction Company Inc → McCormick Pit; 1992-05-01 to 1995-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Al Johnson Construction Company → McCormick Pit; 1992-05-01 to 1995-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Al Johnson Construction Company → Asta Construction Company Inc; 1992-05-01 to 1995-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Asta Construction Company Inc → McCormick Pit; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Boyd  Mc Millan  et al → McCormick Pit; 1995-06-01 to 2025-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Boyd  Mc Millan  et al → Asta Construction Company Inc; 1995-06-01 to 2025-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Walter  Koenig → McCormick Pit; 2025-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter  Koenig → Asta Construction Company Inc; 2025-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian  Koenig → Asta Construction Company Inc; 2025-10-05 to current/open; source msha-controller-operator-history