# Relationship history for MSHA mine 1103134

Current hierarchy: **David K  Stark → Stark Materials Company, Inc. → Mahomet Gravel 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** David K  Stark → Mahomet Gravel Pit; 1989-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stark Materials Company, Inc. → Mahomet Gravel Pit; 2004-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David K  Stark → Stark Materials Company, Inc.; 2004-08-01 to current/open; source msha-controller-operator-history