NORTH MARE ISLAND
SubstationCalifornia
At a glance
NORTH MARE ISLAND is an electric transmission substation in California. It is classified as unclassified and connects 0 transmission lines. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Ownership
No owner is recorded for the lines that connect here.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of NORTH MARE ISLAND, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| Hunters Point | Brownfield | CA | San Mateo County | 115 kV | 427 MW | 7.6 yrs | 61.3 |
| EMBARCADERO | Substation-Adjacent | CA | Contra Costa County | 230 kV | 300 MW | 7.6 yrs | 59.8 |
| VACA-DIXON | Substation-Adjacent | CA | Solano County | 500 kV | 1,000 MW | 7.6 yrs | 58.3 |
| STATION G | Substation-Adjacent | CA | Marin County | 230 kV | 300 MW | 7.6 yrs | 57.9 |
| Richmond Refinery TG800 | Brownfield | CA | Marin County | 115 kV | 21 MW | 7.6 yrs | 56.8 |
| SAN RAMON | Substation-Adjacent | CA | Alameda County | 230 kV | 300 MW | 7.6 yrs | 56.7 |
| LAKEVILLE | Substation-Adjacent | CA | Marin County | 230 kV | 300 MW | 7.6 yrs | 56.7 |
| SOBRANTE | Substation-Adjacent | CA | Contra Costa County | 230 kV | 300 MW | 7.6 yrs | 56.5 |
How do candidate sites near NORTH MARE ISLAND score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 61 on the 0–100 DC Readiness scale. They fall in San Mateo County, Contra Costa County, Solano County, Marin County. The California average across 8,490 scored sites is 45.4. 1,573 of those California sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to NORTH MARE ISLAND substation?
0 transmission lines terminate at or pass through NORTH MARE ISLAND in the HIFLD line data.
Where is NORTH MARE ISLAND substation located?
NORTH MARE ISLAND is in California at 38.1145, -122.2896. The datacenter candidate sites closest to it are in San Mateo County, Contra Costa County, Solano County.
Are there datacenter candidate sites near NORTH MARE ISLAND substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of NORTH MARE ISLAND. The highest-scoring is Hunters Point at 61/100. Across California, the average DC Readiness score is 45.4.
More in California
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “NORTH MARE ISLAND substation, California”, https://gridcensus.com/substations/california/north-mare-island-60648c66 (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
Every site and score for NORTH MARE ISLAND substation, California is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.