# Relationship history for MSHA mine 3503600

Current hierarchy: **Darrel A  Nelson → FREEMAN ROCK INC → FREEMAN BROOKINGS WASH PLANT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Ted L  Freeman Jr → FREEMAN BROOKINGS WASH PLANT; 1977-04-01 to 2016-02-25; source msha-controller-operator-history
- **operator_operates_mine:** FREEMAN ROCK INC → FREEMAN BROOKINGS WASH PLANT; 2004-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ted L  Freeman Jr → FREEMAN ROCK INC; 2004-10-19 to 2016-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Darrel A  Nelson → FREEMAN BROOKINGS WASH PLANT; 2016-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrel A  Nelson → FREEMAN ROCK INC; 2016-02-26 to current/open; source msha-controller-operator-history