# Relationship history for MSHA mine 3901437

Current hierarchy: **Michael B  Watson; Christina  Watson → Tri State Construction LLC → Crusher #1**

- 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:** Colony Construction Inc → Crusher #1; 1999-12-01 to 2008-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Marvin  Grandalen  et al → Crusher #1; 1999-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin  Grandalen  et al → Colony Construction Inc; 1999-12-01 to 2008-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Chuck  Watson  et al → Colony Construction Inc; 1999-12-01 to 2008-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Tri State Construction LLC → Crusher #1; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christina  Watson et al → Crusher #1; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christina  Watson et al → Tri State Construction LLC; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael B  Watson et al → Tri State Construction LLC; 2009-01-01 to current/open; source msha-controller-operator-history