# Relationship history for MSHA mine 4609493

Current hierarchy: **Daniel W  Bunn → Dalton Enterprise, Inc → Highwall Miner  #20**

- 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:** Mark Devoe  Osborne → Highwall Miner  #20; 2013-09-17 to 2013-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Dalton  Hopkins → Highwall Miner  #20; 2013-10-19 to 2014-03-04; source msha-controller-operator-history
- **controller_controls_mine:** Daniel W  Bunn → Highwall Miner  #20; 2014-03-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dalton Enterprise, Inc → Highwall Miner  #20; 2014-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel W  Bunn → Dalton Enterprise, Inc; 2014-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark Devoe  Osborne → Dalton Enterprise, Inc; 2014-06-16 to 2013-10-18; source msha-controller-operator-history
- **controller_controls_operator:** Dalton  Hopkins → Dalton Enterprise, Inc; 2014-06-16 to 2014-03-04; source msha-controller-operator-history