# Relationship history for MSHA mine 1519075

Current hierarchy: **Blackhawk Mining LLC → Spurlock Mining LLC → Spurlock #5 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Clearwater Natural Resources LP → Spurlock #5 Surface Mine; 2005-08-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Miller Bros Coal LLC → Spurlock #5 Surface Mine; 2007-01-09 to 2011-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Clearwater Natural Resources LP → Miller Bros Coal LLC; 2007-01-09 to 2011-09-27; source msha-controller-operator-history
- **controller_controls_mine:** John M  Potter et al → Spurlock #5 Surface Mine; 2010-07-16 to 2013-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Blackhawk Mining LLC → Spurlock #5 Surface Mine; 2011-09-28 to 2015-06-30; source msha-controller-operator-history
- **controller_controls_operator:** John M  Potter et al → Blackhawk Mining LLC; 2011-09-28 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Potter et al → Blackhawk Mining LLC; 2011-09-28 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Blackhawk Mining LLC → Spurlock #5 Surface Mine; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blackhawk Mining LLC → Blackhawk Mining LLC; 2013-07-01 to 2015-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Spurlock Mining LLC → Spurlock #5 Surface Mine; 2015-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blackhawk Mining LLC → Spurlock #5 Surface Mine; 2015-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blackhawk Mining LLC → Spurlock Mining LLC; 2015-07-01 to current/open; source msha-controller-operator-history