# Relationship history for MSHA mine 0503134

Current hierarchy: **Larsen L Dale → Peerless Resources Inc → Coal Gulch**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Arness & Mc Griffin Coal Company → Coal Gulch; 1977-12-01 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Arness Sam K → Coal Gulch; 1977-12-01 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Arness Sam K → Arness & Mc Griffin Coal Company; 1977-12-01 to 1985-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Peerless Resources Inc → Coal Gulch; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larsen L Dale → Coal Gulch; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larsen L Dale → Peerless Resources Inc; 1986-01-01 to current/open; source msha-controller-operator-history