# Relationship history for MSHA mine 3608127

Current hierarchy: **Brian A  Dwyer II; Brian A  Dwyer; Dennis J  Dwyer → Erie Aggregates, Inc. → HANAS PIT #1**

- 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:** Hanas Gravel Company → HANAS PIT #1; 1989-10-01 to 2020-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Carol J  Hanas  et al → HANAS PIT #1; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carol J  Hanas  et al → Hanas Gravel Company; 1989-10-01 to 2020-06-03; source msha-controller-operator-history
- **controller_controls_operator:** John R  Hanas  et al → Hanas Gravel Company; 1989-10-01 to 2020-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Deborah A  Will → HANAS PIT #1; 1992-04-02 to 2017-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Brian A  Dwyer et al → HANAS PIT #1; 2017-05-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Erie Aggregates, Inc. → HANAS PIT #1; 2020-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian A  Dwyer et al → Erie Aggregates, Inc.; 2020-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis J  Dwyer et al → Erie Aggregates, Inc.; 2020-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian A  Dwyer II et al → Erie Aggregates, Inc.; 2020-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Deborah A  Will → Erie Aggregates, Inc.; 2020-06-04 to 2017-05-23; source msha-controller-operator-history