# Relationship history for MSHA mine 4608407

Current hierarchy: **Long Branch Energy Corporation → Long Branch Energy → No 13 Mine**

- 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:** White Mountain Mining Co., LLC → No 13 Mine; 1978-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Long Branch Energy Corporation → No 13 Mine; 1989-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Banner Coal & Land Company → No 13 Mine; 1994-05-01 to 1997-07-13; source msha-controller-operator-history
- **controller_controls_operator:** White Mountain Mining Co., LLC → Banner Coal & Land Company; 1994-05-01 to 1997-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Carroll D  Simpkins → No 13 Mine; 1997-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Banner Coal & Land Co. → No 13 Mine; 1997-07-14 to 2003-08-21; source msha-controller-operator-history
- **controller_controls_operator:** Carroll D  Simpkins → Banner Coal & Land Co.; 1997-07-14 to 2003-08-21; source msha-controller-operator-history
- **operator_operates_mine:** Long Branch Energy → No 13 Mine; 2003-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Long Branch Energy Corporation → Long Branch Energy; 2003-08-22 to current/open; source msha-controller-operator-history