# Relationship history for MSHA mine 1001802

Current hierarchy: **Brian L  Wood → Wood's Crushing & Hauling, Inc. → Colburn 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

- **controller_controls_mine:** Brian L  Wood → Colburn Pit; 1984-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ronald E May → Colburn Pit; 1987-07-01 to 2002-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Ronald E  May → Colburn Pit; 1987-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald E  May → Ronald E May; 1987-07-01 to 2002-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Diversified Industries & Investments Inc → Colburn Pit; 2002-07-08 to 2005-12-31; source msha-controller-operator-history
- **controller_controls_mine:** John  Oliveira → Colburn Pit; 2002-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Oliveira → Diversified Industries & Investments Inc; 2002-07-08 to 2005-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Wood's Crushing & Hauling, Inc. → Colburn Pit; 2006-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian L  Wood → Wood's Crushing & Hauling, Inc.; 2006-01-01 to current/open; source msha-controller-operator-history