# Relationship history for MSHA mine 4202613

Current hierarchy: **Jeff V  Anderson → StoneRiver Materials → Erda**

- 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:** Rhine Construction → Erda; 2013-09-05 to 2026-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Kolby  Anderson et al → Erda; 2013-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kolby  Anderson et al → Rhine Construction; 2013-09-05 to 2026-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Sharkol LLC et al → Rhine Construction; 2013-09-05 to 2026-03-30; source msha-controller-operator-history
- **operator_operates_mine:** StoneRiver Materials → Erda; 2026-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeff V  Anderson → Erda; 2026-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff V  Anderson → StoneRiver Materials; 2026-03-31 to current/open; source msha-controller-operator-history