# Relationship history for MSHA mine 0504061

Current hierarchy: **Daniel  Robins; Greg  Fulfer → Center Redi Mix Inc → CENTER REDI MIX 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Center Redi Mix Inc → CENTER REDI MIX INC; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Smith → CENTER REDI MIX INC; 1985-06-01 to 2022-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Smith → Center Redi Mix Inc; 1985-06-01 to 2022-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Daniel  Robins et al → CENTER REDI MIX INC; 2022-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Robins et al → Center Redi Mix Inc; 2022-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Fulfer et al → Center Redi Mix Inc; 2022-07-20 to current/open; source msha-controller-operator-history