# Relationship history for MSHA mine 3503607

Current hierarchy: **David G  Gould; Donna L  Gould → COOS BAY TIMBER OPERATORS INC → PEGSON MAXTRAK 1300 CONE**

- 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:** David G  Gould et al → PEGSON MAXTRAK 1300 CONE; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** COOS BAY TIMBER OPERATORS INC → PEGSON MAXTRAK 1300 CONE; 2004-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David G  Gould et al → COOS BAY TIMBER OPERATORS INC; 2004-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna L  Gould et al → COOS BAY TIMBER OPERATORS INC; 2004-10-18 to current/open; source msha-controller-operator-history