# Relationship history for MSHA mine 4105877

Current hierarchy: **Johnston & McLeod Holdings LLC; Core247 LLC → Aggrecore Materials → Knott**

- 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:** Aggrecore Materials → Knott; 2026-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnston & McLeod Holdings LLC et al → Knott; 2026-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnston & McLeod Holdings LLC et al → Aggrecore Materials; 2026-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Core247 LLC et al → Aggrecore Materials; 2026-05-13 to current/open; source msha-controller-operator-history