# Relationship history for MSHA mine 2602552

Current hierarchy: **Elizabeth M  Smith; Ira J  Smith → Desert Deco Rock Inc → Eldorado**

- 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:** Elizabeth M  Smith  et al → Eldorado; 2004-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fromm Construction → Eldorado; 2004-12-15 to 2005-11-21; source msha-controller-operator-history
- **controller_controls_mine:** Jeff E  Fromm → Eldorado; 2004-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff E  Fromm → Fromm Construction; 2004-12-15 to 2005-11-21; source msha-controller-operator-history
- **operator_operates_mine:** Rock Eagle LLC → Eldorado; 2005-11-22 to 2007-05-02; source msha-controller-operator-history
- **controller_controls_mine:** Andrew J  Farley → Eldorado; 2005-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew J  Farley → Rock Eagle LLC; 2005-11-22 to 2007-05-02; source msha-controller-operator-history
- **operator_operates_mine:** Crescent Peak Quarries LLC → Eldorado; 2007-05-03 to 2014-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Elizabeth M  Smith  et al → Crescent Peak Quarries LLC; 2007-05-03 to 2014-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Ira J  Smith  et al → Crescent Peak Quarries LLC; 2007-05-03 to 2014-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Desert Deco Rock Inc → Eldorado; 2014-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ira J  Smith  et al → Eldorado; 2014-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ira J  Smith  et al → Desert Deco Rock Inc; 2014-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elizabeth M  Smith  et al → Desert Deco Rock Inc; 2014-03-17 to current/open; source msha-controller-operator-history