# Relationship history for MSHA mine 3303658

Current hierarchy: **Benjamin A  Erb → Myers Mining Co. LTD → Harlem Mine #7**

- 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:** Burrier Sales → Harlem Mine #7; 1977-10-01 to 1979-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Harold L  Burrier → Harlem Mine #7; 1977-10-01 to 1979-01-23; source msha-controller-operator-history
- **controller_controls_operator:** Harold L  Burrier → Burrier Sales; 1977-10-01 to 1979-01-23; source msha-controller-operator-history
- **controller_controls_mine:** James L  Myers → Harlem Mine #7; 1978-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Myers Mining → Harlem Mine #7; 1979-01-24 to 1997-11-03; source msha-controller-operator-history
- **controller_controls_operator:** James L  Myers → Myers Mining; 1979-01-24 to 1997-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Myers Mining Co. LTD → Harlem Mine #7; 1997-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Benjamin A  Erb → Harlem Mine #7; 1997-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin A  Erb → Myers Mining Co. LTD; 1997-11-04 to current/open; source msha-controller-operator-history