# Relationship history for MSHA mine 3402240

Current hierarchy: **Summit Materials LLC → SCS Materials → Coleman Quarry-SCS Materials**

- 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

- **controller_controls_mine:** Mark  Buster et al → Coleman Quarry-SCS Materials; 1994-03-01 to 2011-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Coleman Quarry-SCS Materials; 2011-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sun Mining → Coleman Quarry-SCS Materials; 2024-06-21 to 2026-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Larry L  Stewart et al → Coleman Quarry-SCS Materials; 2024-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry L  Stewart et al → Sun Mining; 2024-06-21 to 2026-01-06; source msha-controller-operator-history
- **operator_operates_mine:** SCS Materials → Coleman Quarry-SCS Materials; 2026-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → SCS Materials; 2026-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Buster et al → SCS Materials; 2026-01-07 to 2011-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Eddie G  Smith et al → SCS Materials; 2026-01-07 to 2011-01-31; source msha-controller-operator-history