# Relationship history for MSHA mine 0405180

Current hierarchy: **Mitchell  Brown → PORTERVILLE ROCK AND RECYCLE INC → FOUNTAIN SPRINGS**

- 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:** Granite Construction Inc → FOUNTAIN SPRINGS; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bluestone Aggretate → FOUNTAIN SPRINGS; 1992-03-01 to 1996-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Uny → FOUNTAIN SPRINGS; 1992-03-01 to 1996-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Uny → Bluestone Aggretate; 1992-03-01 to 1996-03-24; source msha-controller-operator-history
- **operator_operates_mine:** California Iss Inc → FOUNTAIN SPRINGS; 1996-03-25 to 2003-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → FOUNTAIN SPRINGS; 1996-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → California Iss Inc; 1996-03-25 to 2003-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Mitchell  Brown → FOUNTAIN SPRINGS; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → FOUNTAIN SPRINGS; 2001-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Intermountain Slurry Seal Inc → FOUNTAIN SPRINGS; 2003-06-20 to 2009-04-27; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Intermountain Slurry Seal Inc; 2003-06-20 to 2009-04-27; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → FOUNTAIN SPRINGS; 2009-04-28 to 2017-12-25; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 2009-04-28 to 2017-12-25; source msha-controller-operator-history
- **operator_operates_mine:** Porterville Rock and Recycle Inc → FOUNTAIN SPRINGS; 2017-12-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell  Brown → Porterville Rock and Recycle Inc; 2017-12-26 to current/open; source msha-controller-operator-history