# Relationship history for MSHA mine 3610078

Current hierarchy: **David T  Baker; Michael D  Decker → B & D Stone → Meyer 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:** B & D Stone → Meyer Quarry; 2013-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael D  Decker et al → Meyer Quarry; 2013-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael D  Decker et al → B & D Stone; 2013-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David T  Baker et al → B & D Stone; 2013-08-15 to current/open; source msha-controller-operator-history