Chalk Mountain Powerhouse
BrownfieldShasta County, California · CAISO
At a glance
Chalk Mountain Powerhouse is a brownfield datacenter candidate site in Shasta County, California, scoring 43.2/100 DC Readiness — 63rd of 152 scored sites in the county. Its nearest substation is PIT 3 (1.3 mi, 230 kV). 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. GridCensus catalogs 2 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 Chalk Mountain Powerhouse compare with other sites in Shasta County?
Chalk Mountain Powerhouse ranks 63rd of 152 scored candidate sites in Shasta County. Its 43.2/100 is roughly in line with the county average of 42.6. It is roughly in line with the California average of 45.4 and about 19% below the national average of 53.2.
Against the California average, its strongest sub-score is power availability (45 vs 36) and its weakest is natural hazard (32 vs 51). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Chalk Mountain Powerhouse to power, fiber and other datacenters?
The nearest mapped substation, PIT 3, is about 1.3 miles away and operates at 230 kV. For connectivity, the nearest internet exchange facility is Data Center West Medford at 109.2 miles. 6 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Data Center West Medford, 109.2 miles away.
What are the flood, water and hazard risks at Chalk Mountain Powerhouse?
The site is in FEMA flood zone D, where flood risk has not been determined. WRI rates baseline water stress at 3.80 on a 0–5 scale. No mapped wetlands are recorded on the parcel. The parcel overlaps designated critical habitat (Northern spotted owl (Final)). At the county level, FEMA's National Risk Index rates Shasta 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 Shasta County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| ROUND MOUNTAIN | Substation-Adjacent | 500 kV | 1,000 MW | 7.6 yrs | 55.1 |
| FLANNIGAN | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 50.7 |
| PIT 1 | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 50.7 |
| SHASTA | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 50.7 |
| PIT 7 TAP | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 50.7 |
| KESWICK | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 50.6 |
| SPRING CREEK | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 50.5 |
| PIT 7 | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 50.5 |
Chalk Mountain Powerhouse: common questions
What is the DC Readiness score of Chalk Mountain Powerhouse?
Chalk Mountain Powerhouse scores 43.2/100 on the GridCensus DC Readiness scale, rated fair. It ranks 63rd of 152 scored sites in Shasta County. The Shasta County average is 42.6 and the California average is 45.4.
What is the nearest substation to Chalk Mountain Powerhouse?
The nearest mapped substation is PIT 3, about 1.3 miles away, at 230 kV. GridCensus catalogs 2 MW of candidate capacity for the site.
Which electric utility serves Chalk Mountain Powerhouse?
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 Chalk Mountain Powerhouse in?
Chalk Mountain Powerhouse is in the CAISO region. Projects interconnecting there have averaged a 7.6-year wait from queue request to operation.
Is Chalk Mountain Powerhouse in a flood zone?
The site is in FEMA flood zone D, where flood risk has not been determined.
Who owns Chalk Mountain Powerhouse?
Parcel records list the owner as Pacific Gas & Electric Co. (private land).
How far is Chalk Mountain Powerhouse from an internet exchange?
The nearest internet exchange facility is Data Center West Medford, about 109.2 miles away; 6 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, “Chalk Mountain Powerhouse, Shasta County, CA”, https://gridcensus.com/datacenter-sites/california/shasta-county/chalk-mountain-powerhouse-73dc5321 (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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