# Relationship history for MSHA mine 2302218

Current hierarchy: **BMC Enterprises Inc → MC Materials, LLC → SPRING CREEK MATERIALS, INC.**

- 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:** Spring Creek Materials Inc → SPRING CREEK MATERIALS, INC.; 2000-11-01 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Travis  Morrison → SPRING CREEK MATERIALS, INC.; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis  Morrison → Spring Creek Materials Inc; 2000-11-01 to 2021-06-30; source msha-controller-operator-history
- **operator_operates_mine:** MC Materials, LLC → SPRING CREEK MATERIALS, INC.; 2021-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Holdings et al → SPRING CREEK MATERIALS, INC.; 2021-12-31 to 2024-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Holdings et al → MC Materials, LLC; 2021-12-31 to 2024-04-25; source msha-controller-operator-history
- **controller_controls_operator:** MC-HVP Inc et al → MC Materials, LLC; 2021-12-31 to 2024-04-25; source msha-controller-operator-history
- **controller_controls_mine:** BMC Enterprises Inc → SPRING CREEK MATERIALS, INC.; 2024-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BMC Enterprises Inc → MC Materials, LLC; 2024-04-26 to current/open; source msha-controller-operator-history