# Relationship history for MSHA mine 0103028

Current hierarchy: **Roberts Sharon → Roberts Materials Inc → PLANT 1 GAMBLE 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:** Hubert Lamar  Sikes → PLANT 1 GAMBLE PIT; 1983-09-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & S Materials Inc → PLANT 1 GAMBLE PIT; 1994-10-01 to 1995-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Hubert Lamar  Sikes → S & S Materials Inc; 1994-10-01 to 1995-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Roberts Materials Inc → PLANT 1 GAMBLE PIT; 1995-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roberts Sharon → PLANT 1 GAMBLE PIT; 1995-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roberts Sharon → Roberts Materials Inc; 1995-01-16 to current/open; source msha-controller-operator-history