# Relationship history for MSHA mine 5000713

Current hierarchy: **Hayes Howard C & Michael R → Bedrock Mining Company → A-J Mill Reclaim**

- 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:** Hanson & Mann Construction → A-J Mill Reclaim; 1950-01-01 to 1979-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Alaska Electric Light & Power Company → A-J Mill Reclaim; 1950-01-01 to 1978-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Alaska Electric Light & Power Company → A-J Mill Reclaim; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alaska Electric Light & Power Company → Alaska Electric Light & Power Company; 1950-01-01 to 1978-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Hanson & Mann Construction → A-J Mill Reclaim; 1978-04-01 to 1979-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Hanson & Mann Construction → Hanson & Mann Construction; 1978-04-01 to 1979-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Bedrock Mining Company → A-J Mill Reclaim; 1979-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hayes Howard C & Michael R → A-J Mill Reclaim; 1979-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hayes Howard C & Michael R → Bedrock Mining Company; 1979-04-24 to current/open; source msha-controller-operator-history