# Relationship history for MSHA mine 4605738

Current hierarchy: **James L  Laurita Jr; Thomas A  Laurita → Mepco Inc → Sierra 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:** Maidsville Coal Company Inc → Sierra Mine; 1977-04-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Electra Fuels Inc → Sierra Mine; 1978-03-01 to 1982-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Maidsville Coal Company Inc → Electra Fuels Inc; 1978-03-01 to 1982-11-08; source msha-controller-operator-history
- **controller_controls_mine:** James L  Laurita → Sierra Mine; 1979-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sierra Mining Company Inc → Sierra Mine; 1982-11-09 to 1986-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Petitte James → Sierra Mine; 1982-11-09 to 1986-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Petitte James → Sierra Mining Company Inc; 1982-11-09 to 1986-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Yukon Resources Inc → Sierra Mine; 1986-03-27 to 1986-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Jasper  Petitte et al → Sierra Mine; 1986-03-27 to 1990-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Jasper  Petitte et al → Yukon Resources Inc; 1986-03-27 to 1986-07-23; source msha-controller-operator-history
- **operator_operates_mine:** Laurita Energy Corp → Sierra Mine; 1986-07-24 to 1986-07-31; source msha-controller-operator-history
- **controller_controls_operator:** James L  Laurita → Laurita Energy Corp; 1986-07-24 to 1986-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Mepco Inc → Sierra Mine; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas A  Laurita  et al → Sierra Mine; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Laurita  et al → Mepco Inc; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Laurita Jr  et al → Mepco Inc; 1986-08-01 to current/open; source msha-controller-operator-history