# Relationship history for MSHA mine 3610494

Current hierarchy: **Timothy Bryan  Girts → GIRTS SAND & GRAVEL, LLC → GIRTS SAND & GRAVEL, LLC PIT #4**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Timothy Bryan  Girts → GIRTS SAND & GRAVEL, LLC PIT #4; 2020-06-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** GIRTS SAND & GRAVEL, LLC → GIRTS SAND & GRAVEL, LLC PIT #4; 2026-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy Bryan  Girts → GIRTS SAND & GRAVEL, LLC; 2026-03-16 to current/open; source msha-controller-operator-history