# Relationship history for MSHA mine 3003805

Current hierarchy: **Eldon M  King → D&H Materials, Inc. → Delevan 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:** Eldon M  King → Delevan Pit; 2006-07-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glacial Materials, LLC → Delevan Pit; 2011-04-26 to 2017-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Keith J  Scheetz et al → Delevan Pit; 2011-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith J  Scheetz et al → Glacial Materials, LLC; 2011-04-26 to 2017-05-31; source msha-controller-operator-history
- **controller_controls_operator:** John  Clarey et al → Glacial Materials, LLC; 2011-04-26 to 2017-05-31; source msha-controller-operator-history
- **operator_operates_mine:** D&H Materials, Inc. → Delevan Pit; 2017-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eldon M  King → D&H Materials, Inc.; 2017-06-01 to current/open; source msha-controller-operator-history