# Relationship history for MSHA mine 5001647

Current hierarchy: **Kelly M  Heck; Jade A  Laughlin → Central Gravel Products → Central Gravel Products**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Central Gravel Products → Central Gravel Products; 1999-05-01 to 2016-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Nicolene  Jordan → Central Gravel Products; 1999-05-01 to 2015-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Nicolene  Jordan → Central Gravel Products; 1999-05-01 to 2015-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Loomis et al → Central Gravel Products; 2015-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Loomis et al → Central Gravel Products; 2015-08-11 to 2016-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Nicolene  Jordan et al → Central Gravel Products; 2015-08-11 to 2016-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Central Gravel Products → Central Gravel Products; 2016-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jade A  Laughlin et al → Central Gravel Products; 2016-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jade A  Laughlin et al → Central Gravel Products; 2016-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly M  Heck et al → Central Gravel Products; 2016-03-01 to current/open; source msha-controller-operator-history