# Relationship history for MSHA mine 1401613

Current hierarchy: **Brent B  Bayer; Benjamin  Retter; Kent  Barnow → US Stone Industries, LLC → Middle Creek**

- 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:** US Stone Industries, LLC → Middle Creek; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brent B  Bayer et al → Middle Creek; 2001-06-01 to 2026-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Brent B  Bayer et al → US Stone Industries, LLC; 2001-06-01 to 2026-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Kent  Barnow et al → US Stone Industries, LLC; 2001-06-01 to 2026-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Kent  Barnow et al → Middle Creek; 2026-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kent  Barnow et al → US Stone Industries, LLC; 2026-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin  Retter et al → US Stone Industries, LLC; 2026-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brent B  Bayer et al → US Stone Industries, LLC; 2026-01-08 to current/open; source msha-controller-operator-history