HARTFORD AVENUE
SubstationRhode Island
At a glance
HARTFORD AVENUE is an electric transmission substation in Rhode Island. It is classified as sub-transmission (115 kv) and connects 6 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
No owner is recorded for the lines that connect here.
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #104318 | 115 kV | — | IN SERVICE | 2.8 mi |
| #123441 | 115 kV | — | IN SERVICE | 1.1 mi |
| #137561 | 115 kV | — | IN SERVICE | 1.1 mi |
| #146192 | 115 kV | — | IN SERVICE | 2.8 mi |
| #157142 | 115 kV | — | IN SERVICE | 5.9 mi |
| #157143 | 115 kV | — | IN SERVICE | 5.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of HARTFORD AVENUE, 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 |
|---|---|---|---|---|---|---|---|
| KENT COUNTY | Substation-Adjacent | RI | Kent County | 345 kV | 600 MW | 4.3 yrs | 67.3 |
| WEST FARNUM | Substation-Adjacent | RI | Providence County | 345 kV | 600 MW | 4.3 yrs | 67.2 |
| WEST WALPOLE | Substation-Adjacent | MA | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 66.1 |
| KILLINGLY | Substation-Adjacent | CT | Northeastern Connecticut Planning Region | 345 kV | 600 MW | 4.3 yrs | 65.8 |
| UNKNOWN132928 | Substation-Adjacent | MA | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 65.7 |
| WEST MEDWAY | Substation-Adjacent | MA | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 65.7 |
| BERRY STREET | Substation-Adjacent | MA | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 65.6 |
| OCEAN STATE | Substation-Adjacent | RI | Providence County | 345 kV | 600 MW | 4.3 yrs | 65.5 |
How does HARTFORD AVENUE compare with other substations in Rhode Island?
Rhode Island has 134 substation records in HIFLD, of which 40 carry a station name; the rest are unnamed tap points, risers and line ends. 34 named substations in the state are in HARTFORD AVENUE's 115–229 kV band (85% of named stations). 4 sit in a higher band. 4 named substations in Rhode Island operate at 345 kV or above. The highest voltage recorded in the state is 345 kV, and the state median is 115 kV.
How do candidate sites near HARTFORD AVENUE score?
The 8 highest-scoring candidate sites within about 25 miles range from 66 to 67 on the 0–100 DC Readiness scale. They fall in Kent County, Providence County, Norfolk County, Northeastern Connecticut Planning Region. The Rhode Island average across 445 scored sites is 56.3. 58 of those Rhode Island sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is HARTFORD AVENUE substation?
HARTFORD AVENUE has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so HARTFORD AVENUE is at the national midpoint.
How many transmission lines connect to HARTFORD AVENUE substation?
6 transmission lines terminate at or pass through HARTFORD AVENUE in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 19.7 miles.
Where is HARTFORD AVENUE substation located?
HARTFORD AVENUE is in Rhode Island at 41.8277, -71.5193. The datacenter candidate sites closest to it are in Kent County, Providence County, Norfolk County.
Are there datacenter candidate sites near HARTFORD AVENUE substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of HARTFORD AVENUE. The highest-scoring is KENT COUNTY at 67/100. Across Rhode Island, the average DC Readiness score is 56.3.
Other 115 kV substations in Rhode Island
- FRANKLIN SQUARE· 9 lines
- WOONSOCKET· 8 lines
- DRUMROCK· 6 lines
- JEPSON· 5 lines
- BLACKBURN SWITCHING STATION· 4 lines
- CANONICUS SWITCHYARD· 4 lines
- DEXTER· 4 lines
- GATE II· 3 lines
- All named substations in Rhode Island· 40 stations
- Datacenter candidate sites in Rhode Island· 445 sites
- Brownfield and retired plant sites in Rhode Island
- Substations by state
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, “HARTFORD AVENUE substation, Rhode Island”, https://gridcensus.com/substations/rhode-island/hartford-avenue-1d37d365 (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 HARTFORD AVENUE substation, Rhode Island 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.