# Relationship history for MSHA mine 4103435

Current hierarchy: **Materials Marketing Ltd → A J Brauer Stone Inc → Morgan 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:** A J Brauer Stone Inc → Morgan Pit; 1986-09-01 to 2012-07-26; source msha-controller-operator-history
- **controller_controls_mine:** A J  Brauer III → Morgan Pit; 1986-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A J  Brauer III → A J Brauer Stone Inc; 1986-09-01 to 2012-07-26; source msha-controller-operator-history
- **operator_operates_mine:** A J Brauer Stone Inc → Morgan Pit; 2012-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Materials Marketing Ltd → Morgan Pit; 2012-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Materials Marketing Ltd → A J Brauer Stone Inc; 2012-07-27 to current/open; source msha-controller-operator-history