# Relationship history for MSHA mine 0503083

Current hierarchy: **British Petroleum Company PLC → Bear Creek Mining Company → Golconda**

- 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:** Golconda Mines → Golconda; 1950-01-01 to 1981-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Alice Consolidated Mines Inc Et Al → Golconda; 1950-01-01 to 1981-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Alice Consolidated Mines Inc Et Al → Golconda Mines; 1950-01-01 to 1981-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Bear Creek Mining Company → Golconda; 1981-03-18 to 1981-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Kennecott Copper Corp → Golconda; 1981-03-18 to 1981-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Kennecott Copper Corp → Bear Creek Mining Company; 1981-03-18 to 1981-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Bear Creek Mining Company → Golconda; 1981-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** British Petroleum Company PLC → Golconda; 1981-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** British Petroleum Company PLC → Bear Creek Mining Company; 1981-06-04 to current/open; source msha-controller-operator-history