NARROWS
SubstationCalifornia · SAN DIEGO GAS & ELECTRIC
At a glance
NARROWS is an electric transmission substation in California, on SAN DIEGO GAS & ELECTRIC's transmission network. It is classified as distribution (69–115 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 |
|---|---|---|---|---|
| #313956 | 92 kV | IMPRERIAL IRRIGATION DSITRICT | IN SERVICE | 11.0 mi |
| #304666 | 69 kV | SAN DIEGO GAS & ELECTRIC | IN SERVICE | 11.3 mi |
| #304971 | 69 kV | SAN DIEGO GAS & ELECTRIC | IN SERVICE | 25.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of NARROWS, 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 |
|---|---|---|---|---|---|---|---|
| SUNCREST | Substation-Adjacent | CA | San Diego County | 500 kV | 1,000 MW | 7.6 yrs | 58.0 |
| UNKNOWN301886 | Substation-Adjacent | CA | Imperial County | 345 kV | 600 MW | 7.6 yrs | 53.2 |
| SANTA YSABEL | Substation-Adjacent | CA | San Diego County | 69 kV | 50 MW | 7.6 yrs | 47.2 |
| DESCANSO | Substation-Adjacent | CA | San Diego County | 69 kV | 50 MW | 7.6 yrs | 47.2 |
| TAP302553 | Substation-Adjacent | CA | Riverside County | 92 kV | 50 MW | 7.6 yrs | 47.0 |
| BOULDER CREEK | Substation-Adjacent | CA | San Diego County | 69 kV | 50 MW | 7.6 yrs | 46.9 |
| TAP308035 | Substation-Adjacent | CA | San Diego County | 69 kV | 50 MW | 7.6 yrs | 46.2 |
| NARROWS | Substation-Adjacent | CA | San Diego County | 88 kV | 50 MW | 7.6 yrs | 45.2 |
How does NARROWS compare with other substations in California?
California has 4,260 substation records in HIFLD, of which 3,003 carry a station name; the rest are unnamed tap points, risers and line ends. 379 named substations in the state are in NARROWS's 69–114 kV band (13% of named stations). 1,125 sit in a higher band. 44 named substations in California operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 69 kV.
Who owns the transmission lines at NARROWS?
The 3 connected lines listed above are owned by IMPRERIAL IRRIGATION DSITRICT, SAN DIEGO GAS & ELECTRIC. Line voltages range from 69 kV to 92 kV. Their combined recorded length is about 47.5 miles.
How do candidate sites near NARROWS score?
The 8 highest-scoring candidate sites within about 25 miles range from 45 to 58 on the 0–100 DC Readiness scale. They fall in San Diego County, Imperial County, Riverside 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 NARROWS substation?
NARROWS has a maximum voltage of 88 kV and a minimum of 69 kV. That places it in the 69–114 kV band. The median named US substation in this dataset is 115 kV, so NARROWS is below the national midpoint.
How many transmission lines connect to NARROWS substation?
2 transmission lines terminate at or pass through NARROWS in the HIFLD line data. The connected lines listed here run at 92 kV, 69 kV. Together the listed lines cover about 47.5 miles.
Who owns NARROWS substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at NARROWS belong to SAN DIEGO GAS & ELECTRIC, and others to IMPRERIAL IRRIGATION DSITRICT. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is NARROWS substation located?
NARROWS is in California at 33.1372, -116.2945. The datacenter candidate sites closest to it are in San Diego County, Imperial County, Riverside County.
Are there datacenter candidate sites near NARROWS substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of NARROWS. The highest-scoring is SUNCREST at 58/100. 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, “NARROWS substation, California”, https://gridcensus.com/substations/california/narrows-133d8a8f (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 NARROWS 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.