# Relationship history for MSHA mine 3608470

Current hierarchy: **Ryan  Ruark; William  Ruark → SCRANTON MATERIALS LLC → SCRANTON MATERIALS LLC**

- 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:** Scranton Materials Inc → SCRANTON MATERIALS LLC; 1994-06-01 to 2012-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Haines & Kibblehouse Inc et al → SCRANTON MATERIALS LLC; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haines & Kibblehouse Inc et al → Scranton Materials Inc; 1994-06-01 to 2012-03-07; source msha-controller-operator-history
- **controller_controls_operator:** West Mountain Sand & Gravel Inc et al → Scranton Materials Inc; 1994-06-01 to 2012-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Scranton Materials LLC → SCRANTON MATERIALS LLC; 2012-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ryan  Ruark et al → SCRANTON MATERIALS LLC; 2012-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan  Ruark et al → Scranton Materials LLC; 2012-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Ruark et al → Scranton Materials LLC; 2012-03-08 to current/open; source msha-controller-operator-history