Former Mine site at 39.504, -120.715
Former MineSierra County, California · CAISO
At a glance
Former Mine site at 39.504, -120.715 is a former mine datacenter candidate site in Sierra County, California, scoring 41.2/100 DC Readiness — 41st of 50 scored sites in the county. It sits in the CAISO grid region and the PACIFIC GAS & ELECTRIC CO. service territory, where interconnection has averaged 7.6 years from request to operation.
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 Former Mine site at 39.504, -120.715 compare with other sites in Sierra County?
Former Mine site at 39.504, -120.715 ranks 41st of 50 scored candidate sites in Sierra County. Its 41.2/100 is roughly in line with the county average of 44.2. It is roughly in line with the California average of 45.4 and about 23% below the national average of 53.2.
Against the California average, its strongest sub-score is natural hazard (52 vs 51) and its weakest is fiber connectivity (53 vs 66). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Former Mine site at 39.504, -120.715 to power, fiber and other datacenters?
The nearest located transmission bottleneck is 32218_DRUM _115_32244_BRNSWKT2_115_BR_2 _1 (CAISO), 21 miles away. For connectivity, the nearest internet exchange facility is CENTRA RNO01 - Reno Nevada (200 S. Virginia) at 48.2 miles. 1 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Switch Tahoe Reno, 48 miles away.
What are the flood, water and hazard risks at Former Mine site at 39.504, -120.715?
At the county level, FEMA's National Risk Index rates Sierra County "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 Sierra County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| BORDERTOWN | Substation-Adjacent | 345 kV | 600 MW | 7.6 yrs | 56.9 |
| FORT SAGE | Substation-Adjacent | 345 kV | 600 MW | 3.5 yrs | 54.8 |
| N. TRUCKEE | Substation-Adjacent | 120 kV | 100 MW | 7.6 yrs | 49.0 |
| STAMPEDE DAM | Substation-Adjacent | 69 kV | 50 MW | 7.6 yrs | 47.3 |
| HOBART | Substation-Adjacent | 69 kV | 50 MW | 7.6 yrs | 47.2 |
| Portola | Brownfield | 60 kV | 6 MW | 7.6 yrs | 47.1 |
| UNKNOWN308926 | Substation-Adjacent | 69 kV | 50 MW | 7.6 yrs | 47.0 |
| SIERRA BROOKS | Substation-Adjacent | 69 kV | 50 MW | 7.6 yrs | 46.8 |
Former Mine site at 39.504, -120.715: common questions
What is the DC Readiness score of Former Mine site at 39.504, -120.715?
Former Mine site at 39.504, -120.715 scores 41.2/100 on the GridCensus DC Readiness scale, rated fair. It ranks 41st of 50 scored sites in Sierra County. The Sierra County average is 44.2 and the California average is 45.4.
Which electric utility serves Former Mine site at 39.504, -120.715?
PACIFIC GAS & ELECTRIC CO. (investor owned) holds the retail service territory that contains the site; its holding company is PACIFIC GAS & ELECTRIC CORPORATION.
What grid region is Former Mine site at 39.504, -120.715 in?
Former Mine site at 39.504, -120.715 is in the CAISO region. Projects interconnecting there have averaged a 7.6-year wait from queue request to operation.
How far is Former Mine site at 39.504, -120.715 from an internet exchange?
The nearest internet exchange facility is CENTRA RNO01 - Reno Nevada (200 S. Virginia), about 48.2 miles away; 1 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, “Former Mine site at 39.504, -120.715, Sierra County, CA”, https://gridcensus.com/datacenter-sites/california/sierra-county/mine-site-df8ecb3c (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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