# Relationship history for MSHA mine 4105207

Current hierarchy: **Steve  Galmor → Galmor's/G&G Steam Services, Inc → Rock Crusher #1**

- 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:** Steve  Galmor → Rock Crusher #1; 2012-03-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Galmor's/G&G Steam Services, Inc → Rock Crusher #1; 2016-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Galmor → Galmor's/G&G Steam Services, Inc; 2016-07-06 to current/open; source msha-controller-operator-history