# Relationship history for MSHA mine 4608825

Current hierarchy: **Parkstone Energy LLC → Asset Mining LLC → Tacoma No 1 Surface Mine**

- 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:** Hanover Resources, LLC → Tacoma No 1 Surface Mine; 2000-03-01 to 2008-12-28; source msha-controller-operator-history
- **controller_controls_mine:** Douglas M  Epling et al → Tacoma No 1 Surface Mine; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas M  Epling et al → Hanover Resources, LLC; 2000-03-01 to 2008-12-28; source msha-controller-operator-history
- **operator_operates_mine:** Asset Mining LLC → Tacoma No 1 Surface Mine; 2008-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Parkstone Energy LLC → Tacoma No 1 Surface Mine; 2008-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Parkstone Energy LLC → Asset Mining LLC; 2008-12-29 to current/open; source msha-controller-operator-history