# Relationship history for MSHA mine 5001794

Current hierarchy: **Curtis  Fesler; William  Prosser → Knik Management, LLC → Knik 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Denali Materials, Inc. → Knik Gravel Pit; 2004-06-07 to 2009-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Gerald J  Desjarlais → Knik Gravel Pit; 2004-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald J  Desjarlais → Denali Materials, Inc.; 2004-06-07 to 2009-06-08; source msha-controller-operator-history
- **operator_operates_mine:** Knik Aggregates, LLC → Knik Gravel Pit; 2009-06-09 to 2015-04-21; source msha-controller-operator-history
- **controller_controls_mine:** William  Prosser et al → Knik Gravel Pit; 2009-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Prosser et al → Knik Aggregates, LLC; 2009-06-09 to 2015-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Jack M  Hayden et al → Knik Aggregates, LLC; 2009-06-09 to 2015-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Knik Management, LLC → Knik Gravel Pit; 2015-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Curtis  Fesler et al → Knik Gravel Pit; 2015-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Fesler et al → Knik Management, LLC; 2015-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Prosser et al → Knik Management, LLC; 2015-04-22 to current/open; source msha-controller-operator-history