RISER307770
SubstationCalifornia · PACIFIC GAS & ELECTRIC COMPANY
At a glance
RISER307770 is an electric transmission substation in California, on PACIFIC GAS & ELECTRIC COMPANY's transmission network. It is classified as sub-transmission (115 kv) and connects 2 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #312112 | 115 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 0.5 mi |
| #312835 | 115 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 1.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of RISER307770, 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 |
|---|---|---|---|---|---|---|---|
| TESLA Power Project | Brownfield | CA | Alameda County | 500 kV | 1,322 MW | 7.6 yrs | 66.5 |
| METCALF 1 | Substation-Adjacent | CA | Santa Clara County | 500 kV | 1,000 MW | 7.6 yrs | 62.4 |
| NEWARK DISTRIBUTION | Substation-Adjacent | CA | Alameda County | 230 kV | 300 MW | 7.6 yrs | 59.3 |
| TESLA | Substation-Adjacent | CA | Alameda County | 500 kV | 1,000 MW | 7.6 yrs | 59.2 |
| S.L.A.C. | Substation-Adjacent | CA | San Mateo County | 230 kV | 300 MW | 7.6 yrs | 58.8 |
| EASTSHORE | Substation-Adjacent | CA | Alameda County | 230 kV | 300 MW | 7.6 yrs | 58.7 |
| LOS ESTEROS | Substation-Adjacent | CA | Alameda County | 230 kV | 300 MW | 7.6 yrs | 58.6 |
| TRACY | Substation-Adjacent | CA | San Joaquin County | 500 kV | 1,000 MW | 7.6 yrs | 58.6 |
Who owns the transmission lines at RISER307770?
The 2 connected lines listed above are owned by PACIFIC GAS & ELECTRIC COMPANY. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 2.3 miles.
How do candidate sites near RISER307770 score?
The 8 highest-scoring candidate sites within about 25 miles range from 59 to 67 on the 0–100 DC Readiness scale. They fall in Alameda County, Santa Clara County, San Mateo County, San Joaquin 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
What voltage is RISER307770 substation?
RISER307770 has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so RISER307770 is at the national midpoint.
How many transmission lines connect to RISER307770 substation?
2 transmission lines terminate at or pass through RISER307770 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 2.3 miles.
Who owns RISER307770 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at RISER307770 belong to PACIFIC GAS & ELECTRIC COMPANY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is RISER307770 substation located?
RISER307770 is in California at 37.4235, -121.9540. The datacenter candidate sites closest to it are in Alameda County, Santa Clara County, San Mateo County.
Are there datacenter candidate sites near RISER307770 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of RISER307770. The highest-scoring is TESLA Power Project at 67/100. 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, “RISER307770 substation, California”, https://gridcensus.com/substations/california/riser307770-43dc1825 (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 RISER307770 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.