# Relationship history for MSHA mine 3200993

Current hierarchy: **Jay  Smith → Las Vegas Paving Corp. → River Basin #1 Myer/Trenton Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Robert L  Mendenhall → River Basin #1 Myer/Trenton Pit; 1998-09-11 to 2018-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Las Vegas Paving Corp. → River Basin #1 Myer/Trenton Pit; 2012-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Mendenhall → Las Vegas Paving Corp.; 2012-09-12 to 2018-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Jay  Smith et al → River Basin #1 Myer/Trenton Pit; 2018-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jay  Smith et al → Las Vegas Paving Corp.; 2018-06-03 to current/open; source msha-controller-operator-history