# Relationship history for MSHA mine 3503985

Current hierarchy: **Bryan  Brown; Marc  Rickabaugh → Rickabaugh Construction → Metolius 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:** Rickabaugh Construction → Metolius Quarry; 2026-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marc  Rickabaugh et al → Metolius Quarry; 2026-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marc  Rickabaugh et al → Rickabaugh Construction; 2026-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryan  Brown et al → Rickabaugh Construction; 2026-04-06 to current/open; source msha-controller-operator-history