# Relationship history for MSHA mine 0504697

Current hierarchy: **Kenneth  Tunstall; Thomas Paul  Moltz; Eric  Moltz → ACA Products Inc → 50-3-03 PORTABLE WASH PLANT II**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Vincent Paul  Moltz → 50-3-03 PORTABLE WASH PLANT II; 1987-10-01 to 2016-12-31; source msha-controller-operator-history
- **operator_operates_mine:** ACA Products Inc → 50-3-03 PORTABLE WASH PLANT II; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent Paul  Moltz → ACA Products Inc; 2001-01-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Tunstall et al → 50-3-03 PORTABLE WASH PLANT II; 2017-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Tunstall et al → ACA Products Inc; 2017-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric  Moltz et al → ACA Products Inc; 2017-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Paul  Moltz et al → ACA Products Inc; 2017-01-01 to current/open; source msha-controller-operator-history