# Relationship history for MSHA mine 0504627

Current hierarchy: **EMSU LLC → Nuvemco LLC → Last Chance 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:** L S C Mining Company → Last Chance Mine; 1998-09-01 to 1999-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Carter Linda Sue → Last Chance Mine; 1998-09-01 to 1999-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Carter Linda Sue → L S C Mining Company; 1998-09-01 to 1999-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Excel Mining Company Inc → Last Chance Mine; 1999-02-01 to 2007-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Godfrey Jim Et Al → Last Chance Mine; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Godfrey Jim Et Al → Excel Mining Company Inc; 1999-02-01 to 2007-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Nuvemco LLC → Last Chance Mine; 2007-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** EMSU LLC et al → Last Chance Mine; 2007-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** EMSU LLC et al → Nuvemco LLC; 2007-04-20 to current/open; source msha-controller-operator-history