# Relationship history for MSHA mine 1401809

Current hierarchy: **Louis J  Robelli; Peter J  Molitor → Air Capitol Materials → Air Capitol Materials**

- 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:** Air Capitol Materials → Air Capitol Materials; 2019-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter J  Molitor et al → Air Capitol Materials; 2019-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter J  Molitor et al → Air Capitol Materials; 2019-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis J  Robelli et al → Air Capitol Materials; 2019-10-30 to current/open; source msha-controller-operator-history