# Relationship history for MSHA mine 1700927

Current hierarchy: **Timothy H Gott → Doug Gott & Sons, Inc. → Bass Harbor Portable Plant**

- 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

- **controller_controls_mine:** Douglas A  Gott  et al → Bass Harbor Portable Plant; 1978-03-09 to 2012-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Timothy  Gott et al → Bass Harbor Portable Plant; 2012-07-27 to 2024-11-04; source msha-controller-operator-history
- **operator_operates_mine:** Doug Gott & Sons, Inc. → Bass Harbor Portable Plant; 2014-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Gott et al → Doug Gott & Sons, Inc.; 2014-04-23 to 2024-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Peter  Gott et al → Doug Gott & Sons, Inc.; 2014-04-23 to 2024-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Gott et al → Doug Gott & Sons, Inc.; 2014-04-23 to 2024-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Douglas A  Gott  et al → Doug Gott & Sons, Inc.; 2014-04-23 to 2012-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Timothy H Gott → Bass Harbor Portable Plant; 2024-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy H Gott → Doug Gott & Sons, Inc.; 2024-11-05 to current/open; source msha-controller-operator-history