# Relationship history for MSHA mine 1102723

Current hierarchy: **Michael N  Cullinan; James P  Bruner → Riverside Materials Inc → Riverside Materials Incorporated**

- 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:** Riverside Materials Inc → Riverside Materials Incorporated; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James P  Bruner et al → Riverside Materials Incorporated; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Bruner et al → Riverside Materials Inc; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael N  Cullinan et al → Riverside Materials Inc; 1980-02-01 to current/open; source msha-controller-operator-history