# Relationship history for MSHA mine 0301793

Current hierarchy: **Scott H  Kaufman → Pyramid Rock Llc → FAULKNER COUNTY 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:** Pyramid Rock Llc → FAULKNER COUNTY QUARRY; 1998-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott H  Kaufman  et al → FAULKNER COUNTY QUARRY; 1998-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott H  Kaufman  et al → Pyramid Rock Llc; 1998-03-01 to current/open; source msha-controller-operator-history