# Relationship history for MSHA mine 1800690

Current hierarchy: **Mattingly James T → K & J Development Corp → Carlos Strip**

- 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:** C J Merlo Inc → Carlos Strip; 1982-05-01 to 1984-12-17; source msha-controller-operator-history
- **controller_controls_mine:** Merlo Charles J Jr → Carlos Strip; 1982-05-01 to 1984-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Merlo Charles J Jr → C J Merlo Inc; 1982-05-01 to 1984-12-17; source msha-controller-operator-history
- **operator_operates_mine:** K & J Development Corp → Carlos Strip; 1984-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mattingly James T → Carlos Strip; 1984-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mattingly James T → K & J Development Corp; 1984-12-18 to current/open; source msha-controller-operator-history