# Relationship history for MSHA mine 5100193

Current hierarchy: **Nan Inc → Grace Pacific Corp → Kalaeloa Sand Processing Plant**

- 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

- **controller_controls_mine:** Grace Pacific Corp → Kalaeloa Sand Processing Plant; 1984-04-17 to 2013-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Grace Pacific Corp → Kalaeloa Sand Processing Plant; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grace Pacific Corp → Grace Pacific Corp; 1988-08-01 to 2013-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Alexander & Baldwin Incorporated → Kalaeloa Sand Processing Plant; 2013-10-01 to 2023-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Alexander & Baldwin Incorporated → Grace Pacific Corp; 2013-10-01 to 2023-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Nan Inc → Kalaeloa Sand Processing Plant; 2023-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nan Inc → Grace Pacific Corp; 2023-11-15 to current/open; source msha-controller-operator-history