# Relationship history for MSHA mine 3608966

Current hierarchy: **David Eugene  Rumage → David Rumage → H.B. Williams 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:** H B Williams Inc → H.B. Williams Quarry; 2001-04-01 to 2016-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Donna  Williams → H.B. Williams Quarry; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna  Williams → H B Williams Inc; 2001-04-01 to 2016-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Roburt C  Whittemore → H.B. Williams Quarry; 2009-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Enrique E  Vasquez → H.B. Williams Quarry; 2014-10-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Decker Quarries → H.B. Williams Quarry; 2016-12-01 to 2019-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Douglas P  Decker → H.B. Williams Quarry; 2016-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas P  Decker → Decker Quarries; 2016-12-01 to 2019-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Whittemore Quarries → H.B. Williams Quarry; 2019-06-19 to 2020-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Roburt C  Whittemore → Whittemore Quarries; 2019-06-19 to 2020-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Vasquez Stone Supply LLC → H.B. Williams Quarry; 2020-03-26 to 2025-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Enrique E  Vasquez → Vasquez Stone Supply LLC; 2020-03-26 to 2025-04-06; source msha-controller-operator-history
- **operator_operates_mine:** David Rumage → H.B. Williams Quarry; 2025-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David Eugene  Rumage → H.B. Williams Quarry; 2025-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Eugene  Rumage → David Rumage; 2025-04-07 to current/open; source msha-controller-operator-history