# Relationship history for MSHA mine 4103389

Current hierarchy: **Timothy Dean Word III; Suzanne  Word; Forrest  Word; Bryan  Word → Dean Word Company → #5 Portable Rock Crusher**

- 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:** Joe R  Williams Jr → #5 Portable Rock Crusher; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy D  Word et al → #5 Portable Rock Crusher; 1978-09-01 to 2019-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Texas Architectural Aggregate Inc → #5 Portable Rock Crusher; 1986-03-01 to 1988-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Joe R  Williams Jr → Texas Architectural Aggregate Inc; 1986-03-01 to 1988-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Dean Word Company → #5 Portable Rock Crusher; 1988-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy D  Word et al → Dean Word Company; 1988-12-14 to 2019-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Timothy Dean Word III et al → #5 Portable Rock Crusher; 2019-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy Dean Word III et al → Dean Word Company; 2019-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Suzanne  Word et al → Dean Word Company; 2019-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryan  Word et al → Dean Word Company; 2019-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Forrest  Word et al → Dean Word Company; 2019-04-01 to current/open; source msha-controller-operator-history