# Relationship history for MSHA mine 1302255

Current hierarchy: **David S  Smith → R. D. Smith Enterprises L.L.C. → Crusher #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** R. D. Smith Enterprises L.L.C. → Crusher #1; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David S  Smith Et Al → Crusher #1; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David S  Smith Et Al → R. D. Smith Enterprises L.L.C.; 2001-04-01 to current/open; source msha-controller-operator-history