# Relationship history for MSHA mine 2900502

Current hierarchy: **Oren  Matthews; Jimmy  Matthews → Rocky Road Gravel Products → Rocky Road**

- 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:** Rocky Road Gravel Products → Rocky Road; 1986-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Oren  Matthews et al → Rocky Road; 1986-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oren  Matthews et al → Rocky Road Gravel Products; 1986-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy  Matthews et al → Rocky Road Gravel Products; 1986-03-01 to current/open; source msha-controller-operator-history