# Relationship history for MSHA mine 2902437

Current hierarchy: **William J Sweatt Revocable Trust; Brad G Larson; Nancy E Larson → Sweatt Construction Inc. → Mobile Crusher 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:** William J  Sweatt → Mobile Crusher 2; 2012-08-01 to 2022-03-29; source msha-controller-operator-history
- **operator_operates_mine:** Sweatt Construction Inc. → Mobile Crusher 2; 2013-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William J  Sweatt → Sweatt Construction Inc.; 2013-12-31 to 2022-03-29; source msha-controller-operator-history
- **controller_controls_mine:** William J Sweatt Revocable Trust et al → Mobile Crusher 2; 2022-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William J Sweatt Revocable Trust et al → Sweatt Construction Inc.; 2022-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad G Larson et al → Sweatt Construction Inc.; 2022-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nancy E Larson et al → Sweatt Construction Inc.; 2022-03-30 to current/open; source msha-controller-operator-history