# Relationship history for MSHA mine 0102911

Current hierarchy: **William  Mc Leod → Friese Hauling Inc → FREISE #225**

- 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:** William  Mc Leod → FREISE #225; 1983-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 225 Sand & Gravel Company → FREISE #225; 1991-06-01 to 1991-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Grady C  Glover → FREISE #225; 1991-06-01 to 1991-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Grady C  Glover → 225 Sand & Gravel Company; 1991-06-01 to 1991-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Friese Hauling Inc → FREISE #225; 1991-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Mc Leod → Friese Hauling Inc; 1991-08-01 to current/open; source msha-controller-operator-history