# Relationship history for MSHA mine 2402036

Current hierarchy: **L A Construction--Dick Anderson Construction-J V → L A Construction--Dick Anderson Construction-J V → Rip Rap Quarry**

- 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:** L A Construction--Dick Anderson Construction-J V → Rip Rap Quarry; 1993-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** L A Construction--Dick Anderson Construction-J V → Rip Rap Quarry; 1993-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L A Construction--Dick Anderson Construction-J V → L A Construction--Dick Anderson Construction-J V; 1993-11-01 to current/open; source msha-controller-operator-history