# Relationship history for MSHA mine 4101334

Current hierarchy: **Timothy Dean Word III; Suzanne  Word; Forrest  Word; Bryan  Word → Dean Word Company → DOW QUARRY**

- 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

- **operator_operates_mine:** Dean Word Company → DOW QUARRY; 1978-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy D  Word et al → DOW QUARRY; 1978-09-01 to 2019-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Timothy D  Word et al → Dean Word Company; 1978-09-01 to 2019-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Bryan  Word et al → DOW QUARRY; 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
- **controller_controls_operator:** Suzanne  Word et al → Dean Word Company; 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