# Relationship history for MSHA mine 0203389

Current hierarchy: **Raymond  Ames → Ames Construction → Mineral Park Crush and Screen**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Richard  Ames → Mineral Park Crush and Screen; 1991-05-01 to 2019-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Ames Construction → Mineral Park Crush and Screen; 2017-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Ames → Ames Construction; 2017-10-24 to 2019-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Ames → Mineral Park Crush and Screen; 2019-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Ames → Ames Construction; 2019-01-31 to current/open; source msha-controller-operator-history