# Relationship history for MSHA mine 3606030

Current hierarchy: **Bruce J Howard → Bradys Bend Dock Inc → Blue Row Tipple**

- 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:** Blue Row Tipple → Blue Row Tipple; 1976-03-01 to 1988-04-26; source msha-controller-operator-history
- **controller_controls_mine:** Lewis Henry J & Howard Bruce → Blue Row Tipple; 1976-03-01 to 1988-04-26; source msha-controller-operator-history
- **controller_controls_operator:** Lewis Henry J & Howard Bruce → Blue Row Tipple; 1976-03-01 to 1988-04-26; source msha-controller-operator-history
- **operator_operates_mine:** Bradys Bend Dock Inc → Blue Row Tipple; 1988-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bruce J Howard → Blue Row Tipple; 1988-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce J Howard → Bradys Bend Dock Inc; 1988-04-27 to current/open; source msha-controller-operator-history