# Relationship history for MSHA mine 0103526

Current hierarchy: **Joshua  Seawright; Kendall W Robison Sr → Seawright & Robison Construction, Inc. → Mitchell Mtn Quarry Hwy 144**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Scott Johnson Construction → Mitchell Mtn Quarry Hwy 144; 2019-01-02 to 2023-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Scott A Johnson → Mitchell Mtn Quarry Hwy 144; 2019-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott A Johnson → Scott Johnson Construction; 2019-01-02 to 2023-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Joshua  Seawright et al → Mitchell Mtn Quarry Hwy 144; 2021-05-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Seawright & Robison Construction, Inc. → Mitchell Mtn Quarry Hwy 144; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joshua  Seawright et al → Seawright & Robison Construction, Inc.; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kendall W Robison Sr et al → Seawright & Robison Construction, Inc.; 2024-01-01 to current/open; source msha-controller-operator-history