# Relationship history for MSHA mine 3200162

Current hierarchy: **Steve  Farden → Farden Construction Inc → Portable Unit #5**

- 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:** Don Harris Gravel Company Inc → Portable Unit #5; 1950-01-01 to 1987-05-10; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Harris → Portable Unit #5; 1950-01-01 to 1987-05-10; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Harris → Don Harris Gravel Company Inc; 1950-01-01 to 1987-05-10; source msha-controller-operator-history
- **operator_operates_mine:** Harris Graveling Inc → Portable Unit #5; 1987-05-11 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kirk J  Harris et al → Portable Unit #5; 1987-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kirk J  Harris et al → Harris Graveling Inc; 1987-05-11 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Timothy A  Harris et al → Harris Graveling Inc; 1987-05-11 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Farden et al → Portable Unit #5; 1993-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Farden Construction Inc → Portable Unit #5; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Farden et al → Farden Construction Inc; 2014-01-01 to current/open; source msha-controller-operator-history