# Relationship history for MSHA mine 0202254

Current hierarchy: **Monte Vista Aggregates → Monte Vista Aggregates → Golden Dam 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:** Monte Vista Aggregates → Golden Dam Pit; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Monte Vista Aggregates → Golden Dam Pit; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Monte Vista Aggregates → Monte Vista Aggregates; 1985-06-01 to current/open; source msha-controller-operator-history