# Relationship history for MSHA mine 2103472

Current hierarchy: **Jon A  Long → Long Aggregate → Olson 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:** Long Sand & Gravel → Olson Pit; 2004-11-23 to 2013-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Jon A  Long → Olson Pit; 2004-11-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon A  Long → Long Sand & Gravel; 2004-11-23 to 2013-08-21; source msha-controller-operator-history
- **operator_operates_mine:** Long Aggregate → Olson Pit; 2013-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jon A  Long → Olson Pit; 2013-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon A  Long → Long Aggregate; 2013-08-22 to current/open; source msha-controller-operator-history