# Relationship history for MSHA mine 0504051

Current hierarchy: **Ron  Hitti; Mike  Hitti → Commercial Rock Products Inc → HALVERSON 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:** Garcia Construction Inc → HALVERSON PIT; 1985-06-01 to 1987-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Francis  Garcia → HALVERSON PIT; 1985-06-01 to 1987-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Francis  Garcia → Garcia Construction Inc; 1985-06-01 to 1987-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Commercial Rock Products Inc → HALVERSON PIT; 1987-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Hitti  et al → HALVERSON PIT; 1987-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Hitti  et al → Commercial Rock Products Inc; 1987-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Hitti  et al → Commercial Rock Products Inc; 1987-07-29 to current/open; source msha-controller-operator-history