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Power Operations
Western's Sierra Nevada Region operates approximately 1,200 miles of high voltage transmission line in the
Central Valley Project (CVP) and California-Oregon Transmission Project (COTP).
Information about Western's transmission systems are available through OASIS, which stands for
Open Access-Same Time Information Systems. Four OASIS operate in Western's area. OASIS access is for
transmission system users and is not available to the general public.
- OASIS Site's
- Maintenance Data
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