# Relationship history for MSHA mine 2003291

Current hierarchy: **Brian  Hoffman; Dan R  Eriksson → Hoffman Bros inc → Seybert Pit**

- 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:** Seybert's Excavating → Seybert Pit; 2004-04-15 to 2016-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Terry L  Seybert → Seybert Pit; 2004-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry L  Seybert → Seybert's Excavating; 2004-04-15 to 2016-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Hoffman Bros inc → Seybert Pit; 2016-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dan R  Eriksson et al → Seybert Pit; 2016-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan R  Eriksson et al → Hoffman Bros inc; 2016-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Hoffman et al → Hoffman Bros inc; 2016-03-22 to current/open; source msha-controller-operator-history