# Relationship history for MSHA mine 2600438

Current hierarchy: **Wes  Adams → Spec Aggregates → IWS BRQ**

- 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:** Gornowich Sand & Gravel Inc → IWS BRQ; 1950-01-01 to 2002-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Robert S  Martinez → IWS BRQ; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert S  Martinez → Gornowich Sand & Gravel Inc; 1950-01-01 to 2002-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Wadley → IWS BRQ; 1999-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ISN Aggregates LLC → IWS BRQ; 2002-02-06 to 2007-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Wadley → IWS BRQ; 2002-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Wadley → ISN Aggregates LLC; 2002-02-06 to 2007-08-31; source msha-controller-operator-history
- **operator_operates_mine:** CTC Crushing → IWS BRQ; 2007-09-01 to 2010-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Wadley → CTC Crushing; 2007-09-01 to 2010-05-31; source msha-controller-operator-history
- **operator_operates_mine:** North Brown Properties → IWS BRQ; 2010-06-01 to 2010-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Wadley → IWS BRQ; 2010-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Wadley → North Brown Properties; 2010-06-01 to 2010-09-13; source msha-controller-operator-history
- **operator_operates_mine:** CTC Crushing, LLC → IWS BRQ; 2010-09-14 to 2025-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Wadley → CTC Crushing, LLC; 2010-09-14 to 2025-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Wes  Adams → IWS BRQ; 2018-10-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Spec Aggregates → IWS BRQ; 2025-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wes  Adams → Spec Aggregates; 2025-07-17 to current/open; source msha-controller-operator-history