BORDER TAP
Substation-AdjacentSan Diego, California · CAISO
At a glance
BORDER TAP is a substation-adjacent datacenter candidate site in San Diego, California, scoring 49.9/100 DC Readiness — 112th of 550 scored sites in the county. Its nearest substation is BORDER TAP (0 mi, 69 kV). It sits in the CAISO grid region and the SAN DIEGO GAS & ELECTRIC CO service territory, where interconnection has averaged 7.6 years from request to operation. GridCensus catalogs 50 MW of candidate capacity here.
Power & interconnection
Speed to power
Deep queue and long historical waits — plan for a multi-year interconnection timeline and engage the utility early.
Connectivity
Site characteristics
Risk & environment
Location context
Regulatory climate
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Site location
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How does BORDER TAP compare with other sites in San Diego?
BORDER TAP ranks 112th of 550 scored candidate sites in San Diego. Its 49.9/100 is roughly in line with the county average of 47.7. It is roughly in line with the California average of 45.4 and roughly in line with the national average of 53.2.
Against the California average, its strongest sub-score is fiber connectivity (79 vs 66) and its weakest is water (24 vs 27). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is BORDER TAP to power, fiber and other datacenters?
The nearest mapped substation, BORDER TAP, is about 0 miles away and operates at 69 kV. The nearest located transmission bottleneck is MIGUEL_BKs_MXFLW_NG (CAISO), 6 miles away. For connectivity, the nearest internet exchange facility is Border Crossing Pop 1 at 6.4 miles. 19 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Border Crossing Pop 1, 6.4 miles away.
What are the flood, water and hazard risks at BORDER TAP?
At the county level, FEMA's National Risk Index rates San Diego "Relatively High".
Full DC Readiness breakdown
All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.
Nearby comparable sites
Other scored datacenter candidate sites in San Diego, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| MIGUEL | Substation-Adjacent | 500 kV | 1,000 MW | 7.6 yrs | 60.6 |
| SUNCREST | Substation-Adjacent | 500 kV | 1,000 MW | 7.6 yrs | 58.0 |
| PENASQUITOS | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.7 |
| FRIARS | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.6 |
| MISSION | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.6 |
| OLD TOWN | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.4 |
| STATION F | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.4 |
| CALPEAK PE 7 | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.1 |
BORDER TAP: common questions
What is the DC Readiness score of BORDER TAP?
BORDER TAP scores 49.9/100 on the GridCensus DC Readiness scale, rated fair. It ranks 112th of 550 scored sites in San Diego. The San Diego average is 47.7 and the California average is 45.4.
What is the nearest substation to BORDER TAP?
The nearest mapped substation is BORDER TAP, about 0 miles away, at 69 kV. GridCensus catalogs 50 MW of candidate capacity for the site.
Which electric utility serves BORDER TAP?
SAN DIEGO GAS & ELECTRIC CO (investor owned) holds the retail service territory that contains the site; its holding company is SEMPRA ENERGY.
What grid region is BORDER TAP in?
BORDER TAP is in the CAISO region. Projects interconnecting there have averaged a 7.6-year wait from queue request to operation.
How far is BORDER TAP from an internet exchange?
The nearest internet exchange facility is Border Crossing Pop 1, about 6.4 miles away; 19 fiber providers report service at the location.
Related pages
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “BORDER TAP, San Diego, CA”, https://gridcensus.com/datacenter-sites/california/san-diego/border-tap-d6ce1333 (data as of October 10, 2026).
Dataset updated . Screening estimates derived from public data sources.
Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.
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