# Relationship history for MSHA mine 0505112

Current hierarchy: **Barbara J  Boor; Gerald J  Boor Sr → KME LLC → Blister Horn 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

- **operator_operates_mine:** KME LLC → Blister Horn Mine; 2019-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gerald J  Boor Sr et al → Blister Horn Mine; 2019-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald J  Boor Sr et al → KME LLC; 2019-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barbara J  Boor et al → KME LLC; 2019-08-21 to current/open; source msha-controller-operator-history