# Relationship history for MSHA mine 3609880

Current hierarchy: **Scott L Timothy; Todd  Brown; Jason  Holmberg → North Penn Supply Quarries, LLC → Watson #1 & Watson #2**

- 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:** Jerome J  Eckert → Watson #1 & Watson #2; 2010-04-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** North Penn Supply → Watson #1 & Watson #2; 2010-09-13 to 2017-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Jerome J  Eckert → North Penn Supply; 2010-09-13 to 2017-08-23; source msha-controller-operator-history
- **operator_operates_mine:** North Penn Supply Quarries, LLC → Watson #1 & Watson #2; 2017-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Brown et al → Watson #1 & Watson #2; 2017-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Brown et al → North Penn Supply Quarries, LLC; 2017-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott L Timothy et al → North Penn Supply Quarries, LLC; 2017-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Holmberg et al → North Penn Supply Quarries, LLC; 2017-08-24 to current/open; source msha-controller-operator-history