# Relationship history for MSHA mine 0202672

Current hierarchy: **Marvin  Teter → D S Mine & Development LLC → Excelisor**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Dolan Springs Mining & Milling Development Llc → Excelisor; 1996-07-01 to 1998-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Henry  Carter  et al → Excelisor; 1996-07-01 to 1998-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Carter  et al → Dolan Springs Mining & Milling Development Llc; 1996-07-01 to 1998-03-31; source msha-controller-operator-history
- **operator_operates_mine:** D S Mine & Development LLC → Excelisor; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marvin  Teter → Excelisor; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin  Teter → D S Mine & Development LLC; 1998-04-01 to current/open; source msha-controller-operator-history