# Relationship history for MSHA mine 5002007

Current hierarchy: **Steven C  Foster; Rebecca J  Foster → Foster Construction, Inc → Nordberg SV40**

- 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:** Foster Construction, Inc → Nordberg SV40; 2014-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven C  Foster et al → Nordberg SV40; 2014-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven C  Foster et al → Foster Construction, Inc; 2014-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rebecca J  Foster et al → Foster Construction, Inc; 2014-04-17 to current/open; source msha-controller-operator-history