# Relationship history for MSHA mine 3607250

Current hierarchy: **Benjamin T  Elkin → East Run Coal Company → Puyda 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

- **controller_controls_mine:** Benjamin T  Elkin → Puyda 1; 1980-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** East Run Coal Company → Puyda 1; 1981-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin T  Elkin → East Run Coal Company; 1981-12-01 to current/open; source msha-controller-operator-history