# Relationship history for MSHA mine 3605486

Current hierarchy: **James L  Laurita → Concorde Corp → Bald Hill Strip**

- 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:** Energy Resources Corp Of America → Bald Hill Strip; 1975-01-01 to 1978-03-13; source msha-controller-operator-history
- **controller_controls_mine:** James L  Laurita → Bald Hill Strip; 1975-01-01 to 1978-03-13; source msha-controller-operator-history
- **controller_controls_operator:** James L  Laurita → Energy Resources Corp Of America; 1975-01-01 to 1978-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Maidsville Coal Mining Partnership → Bald Hill Strip; 1978-03-14 to 1980-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Consolidated Energy Systems Of Maryland Inc → Bald Hill Strip; 1978-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Consolidated Energy Systems Of Maryland Inc → Maidsville Coal Mining Partnership; 1978-03-14 to 1980-02-06; source msha-controller-operator-history
- **controller_controls_mine:** James L  Laurita → Bald Hill Strip; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Concorde Corp → Bald Hill Strip; 1980-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Laurita → Concorde Corp; 1980-02-07 to current/open; source msha-controller-operator-history