# Relationship history for MSHA mine 2902076

Current hierarchy: **Larson Family Enterprises LLC; BRose Holdings LLC → Vernon Hamilton Construction Company → Tampico 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Vernon  Hamilton → Tampico Pit; 1990-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vernon Hamilton Construction Company Inc. → Tampico Pit; 1991-03-01 to 2020-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Vernon  Hamilton → Vernon Hamilton Construction Company Inc.; 1991-03-01 to 2020-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Vernon Hamilton Construction Company → Tampico Pit; 2020-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** BRose Holdings LLC et al → Tampico Pit; 2020-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BRose Holdings LLC et al → Vernon Hamilton Construction Company; 2020-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larson Family Enterprises LLC et al → Vernon Hamilton Construction Company; 2020-05-01 to current/open; source msha-controller-operator-history