Greenfield (ELROY - HOSENSACK (500 KV SUB))
GreenfieldMontgomery County, Pennsylvania · PJM
At a glance
Greenfield (ELROY - HOSENSACK (500 KV SUB)) is a greenfield datacenter candidate site in Montgomery County, Pennsylvania, scoring 61.5/100 DC Readiness — 25th of 124 scored sites in the county. Its nearest substation is ELROY. It sits in the PJM grid region, where interconnection has averaged 3.6 years from request to operation. GridCensus catalogs 1,000 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
Risk & environment
Location context
Regulatory climate
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Incentive detail: Keystone Opportunity Zone/KOEZ sales and property tax exemptions in designated areas.
Site location
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How does Greenfield (ELROY - HOSENSACK (500 KV SUB)) compare with other sites in Montgomery County?
Greenfield (ELROY - HOSENSACK (500 KV SUB)) ranks 25th of 124 scored candidate sites in Montgomery County. Its 61.5/100 is roughly in line with the county average of 57.2. It is about 19% above the Pennsylvania average of 51.8 and about 16% above the national average of 53.2.
Against the Pennsylvania average, its strongest sub-score is power availability (72 vs 34) and its weakest is speed to power (37 vs 37). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (ELROY - HOSENSACK (500 KV SUB)) to power, fiber and other datacenters?
The nearest mapped substation, ELROY, is the closest grid connection point on record and operates at 500 kV. The nearest located transmission bottleneck is STEELCTY 500/230 XF H 500 KV (PJM), 22 miles away. For connectivity, the nearest internet exchange facility is Flexential - Philadelphia/Collegeville (PHL01) at 11.7 miles. 13 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Flexential Philadelphia - Collegeville, 11.7 miles away.
What are the flood, water and hazard risks at Greenfield (ELROY - HOSENSACK (500 KV SUB))?
At the county level, FEMA's National Risk Index rates Montgomery County "Relatively Moderate".
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 Montgomery County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| CROMBY | Substation-Adjacent | 230 kV | 300 MW | 3.6 yrs | 69.8 |
| WHITPAIN | Substation-Adjacent | 500 kV | 1,000 MW | 3.6 yrs | 68.6 |
| LIMERICK (500KV SUB) | Substation-Adjacent | 500 kV | 1,000 MW | 3.6 yrs | 68.5 |
| CENTERPOINT | Substation-Adjacent | 500 kV | 1,000 MW | 3.6 yrs | 68.3 |
| ELROY | Substation-Adjacent | 500 kV | 1,000 MW | 3.6 yrs | 68.0 |
| BETZWOOD | Substation-Adjacent | 230 kV | 300 MW | 3.6 yrs | 65.6 |
| Ambler Pennsylvania Boiler House (GSHP) | Brownfield | 230 kV | — | 3.6 yrs | 65.5 |
| UNKNOWN123442 | Substation-Adjacent | 230 kV | 300 MW | 3.6 yrs | 65.4 |
Greenfield (ELROY - HOSENSACK (500 KV SUB)): common questions
What is the DC Readiness score of Greenfield (ELROY - HOSENSACK (500 KV SUB))?
Greenfield (ELROY - HOSENSACK (500 KV SUB)) scores 61.5/100 on the GridCensus DC Readiness scale, rated good. It ranks 25th of 124 scored sites in Montgomery County. The Montgomery County average is 57.2 and the Pennsylvania average is 51.8.
What is the nearest substation to Greenfield (ELROY - HOSENSACK (500 KV SUB))?
The nearest mapped substation is ELROY, at 500 kV. GridCensus catalogs 1,000 MW of candidate capacity for the site.
What grid region is Greenfield (ELROY - HOSENSACK (500 KV SUB)) in?
Greenfield (ELROY - HOSENSACK (500 KV SUB)) is in the PJM region. Projects interconnecting there have averaged a 3.6-year wait from queue request to operation.
How far is Greenfield (ELROY - HOSENSACK (500 KV SUB)) from an internet exchange?
The nearest internet exchange facility is Flexential - Philadelphia/Collegeville (PHL01), about 11.7 miles away; 13 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, “Greenfield (ELROY - HOSENSACK (500 KV SUB)), Montgomery County, PA”, https://gridcensus.com/datacenter-sites/pennsylvania/montgomery-county/greenfield-elroy-hosensack-500-kv-sub-e39291d0 (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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Every site and score for Greenfield (ELROY - HOSENSACK (500 KV SUB)), Montgomery County 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.