# Relationship history for MSHA mine 0102535

Current hierarchy: **Vulcan Materials Company → Mc Cartney Construction Company Inc → SIMS PIT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Mc Cartney Construction Company Inc → SIMS PIT; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** M B  McCartney → SIMS PIT; 1983-03-01 to 2018-03-09; source msha-controller-operator-history
- **controller_controls_operator:** M B  McCartney → Mc Cartney Construction Company Inc; 1983-03-01 to 2018-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → SIMS PIT; 2018-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Mc Cartney Construction Company Inc; 2018-03-10 to current/open; source msha-controller-operator-history