# Relationship history for MSHA mine 4703340

Current hierarchy: **Matthew M Koenig → Koenig's Sand & Stone LLC → Risner 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:** Mike's Materials → Risner Pit; 2003-04-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael J Koenig → Risner Pit; 2003-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J Koenig → Mike's Materials; 2003-04-01 to 2016-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Koenig's Sand & Stone LLC → Risner Pit; 2016-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew M Koenig → Risner Pit; 2016-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew M Koenig → Koenig's Sand & Stone LLC; 2016-04-01 to current/open; source msha-controller-operator-history