# Relationship history for MSHA mine 4003136

Current hierarchy: **Wayne  Craig; Tom  McLemore → North Benton Gravel Llc → BIG SANDY MINE**

- 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:** North Benton Gravel Llc → BIG SANDY MINE; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom  McLemore et al → BIG SANDY MINE; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom  McLemore et al → North Benton Gravel Llc; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Craig et al → North Benton Gravel Llc; 1998-10-01 to current/open; source msha-controller-operator-history