# Relationship history for MSHA mine 2902181

Current hierarchy: **Montana  Levacy → Rock Solid Materials LLC → Portales**

- 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:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Portales; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Calmat Company Of New Mexico → Portales; 1999-04-01 to 2002-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Calmat Company Of New Mexico; 1999-04-01 to 2002-09-05; source msha-controller-operator-history
- **operator_operates_mine:** Gilman Rock Crushing Service → Portales; 2002-09-06 to 2017-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Ralph  Gilman → Portales; 2002-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Gilman → Gilman Rock Crushing Service; 2002-09-06 to 2017-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Portales; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Calmat Company Of New Mexico; 2007-11-16 to 2002-09-05; source msha-controller-operator-history
- **operator_operates_mine:** White Rock Crushing LLC → Portales; 2017-01-11 to 2022-10-03; source msha-controller-operator-history
- **controller_controls_mine:** Tina  Dziuk et al → Portales; 2017-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tina  Dziuk et al → White Rock Crushing LLC; 2017-01-11 to 2022-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Maldonado et al → White Rock Crushing LLC; 2017-01-11 to 2022-10-03; source msha-controller-operator-history
- **operator_operates_mine:** A-1 Crushing LLC → Portales; 2022-10-04 to 2024-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Maldonado → Portales; 2022-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Maldonado → A-1 Crushing LLC; 2022-10-04 to 2024-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Rock Solid Materials LLC → Portales; 2024-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Montana  Levacy → Portales; 2024-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Montana  Levacy → Rock Solid Materials LLC; 2024-04-15 to current/open; source msha-controller-operator-history