# Relationship history for MSHA mine 3102307

Current hierarchy: **Jerry Keith Adams → Tarheel Sand & Stone Inc. → Benchmark Mine 1**

- 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:** Jerry Keith Adams → Benchmark Mine 1; 1995-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tarheel Sand & Stone Inc. → Benchmark Mine 1; 2016-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry Keith Adams → Tarheel Sand & Stone Inc.; 2016-11-08 to current/open; source msha-controller-operator-history