# Relationship history for MSHA mine 3200973

Current hierarchy: **Brenda  Guthmiller → GUTHMILLER EARTHMOVING, INC. → CEC ROADRUNNER PORTABLE**

- 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:** Guthmiller Earthmoving, Inc. → CEC ROADRUNNER PORTABLE; 2012-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brenda  Guthmiller → CEC ROADRUNNER PORTABLE; 2012-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brenda  Guthmiller → Guthmiller Earthmoving, Inc.; 2012-05-23 to current/open; source msha-controller-operator-history