# Relationship history for MSHA mine 3002408

Current hierarchy: **Sylvester W  Santos → SANTOS CONSTRUCTION CORP. → RANDALL 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

- **controller_controls_mine:** Sylvester W  Santos → RANDALL PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Santos Construction Corp. → RANDALL PIT; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sylvester W  Santos → Santos Construction Corp.; 1979-01-01 to current/open; source msha-controller-operator-history