# Relationship history for MSHA mine 3200944

Current hierarchy: **Fredrick L Noll; Elaine M Noll → Noll Construction, LLC → Noll Construction #1**

- 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

- **operator_operates_mine:** Noll Construction → Noll Construction #1; 2012-03-13 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Fredrick L  Noll → Noll Construction #1; 2012-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fredrick L  Noll → Noll Construction; 2012-03-13 to 2014-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Noll Construction, LLC → Noll Construction #1; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fredrick L Noll et al → Noll Construction #1; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fredrick L Noll et al → Noll Construction, LLC; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elaine M Noll et al → Noll Construction, LLC; 2015-01-01 to current/open; source msha-controller-operator-history