PAHRUMP – VISTA 138 kV (ckt 1) is a transmission line operating at 138 kVthat appears as a congestion constraint in the California ISO market. When power flow reaches this element's operating limit, CAISO's market optimization assigns it a shadow price — the cost to the system of that limit binding — which in turn drives locational price separation around it.
Across the market intervals retained in this dataset, it has bound 19 times, with the largest shadow price observed at $22.86/MWh on 2026-09-01. Prices are shown with the sign CAISO publishes; magnitude is the severity signal.
Data comes from CAISO OASIS (PRC_NOMOGRAM) for both the day-ahead and real-time markets, refreshed automatically. This page is informational only and is not trading, financial, or operational advice.