# Relationship history for MSHA mine 1202090

Current hierarchy: **Wallace Larry → Wallace Enterprises Inc → Middle Fork Mine**

- 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

- **controller_controls_mine:** Garrison James B → Middle Fork Mine; 1981-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bar Construction Inc → Middle Fork Mine; 1990-11-01 to 1992-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Garrison James B → Bar Construction Inc; 1990-11-01 to 1992-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Wallace Enterprises Inc → Middle Fork Mine; 1992-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wallace Larry → Middle Fork Mine; 1992-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wallace Larry → Wallace Enterprises Inc; 1992-03-20 to current/open; source msha-controller-operator-history