# Relationship history for MSHA mine 3503699

Current hierarchy: **Eric D  Kuenzi; John L  Kuenzi; Kerry D  Kuenzi → K&E Excavating Inc → High Bar**

- 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

- **operator_operates_mine:** Meridian Western Inc → High Bar; 2008-07-07 to 2016-04-11; source msha-controller-operator-history
- **controller_controls_mine:** John H  Cogswell → High Bar; 2008-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John H  Cogswell → Meridian Western Inc; 2008-07-07 to 2016-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Todd R  Hoffman → High Bar; 2015-09-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 316 Mining, L.L.C. → High Bar; 2016-04-12 to 2026-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Todd R  Hoffman → 316 Mining, L.L.C.; 2016-04-12 to 2026-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Kerry D  Kuenzi et al → High Bar; 2018-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K&E Excavating Inc → High Bar; 2026-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerry D  Kuenzi et al → K&E Excavating Inc; 2026-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John L  Kuenzi et al → K&E Excavating Inc; 2026-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric D  Kuenzi et al → K&E Excavating Inc; 2026-07-16 to current/open; source msha-controller-operator-history