# Relationship history for MSHA mine 1900333

Current hierarchy: **Gilbert  Lopes → G Lopes Construction Inc → G Lopes Construction Inc**

- 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:** Mc Cabe Sand & Gravel Company Inc → G Lopes Construction Inc; 1950-01-01 to 2006-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Robert P  Murphy → G Lopes Construction Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert P  Murphy → Mc Cabe Sand & Gravel Company Inc; 1950-01-01 to 2006-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Gilbert  Lopes et al → G Lopes Construction Inc; 1994-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G Lopes Construction Inc → G Lopes Construction Inc; 2006-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gilbert  Lopes et al → G Lopes Construction Inc; 2006-11-12 to current/open; source msha-controller-operator-history