THREE RIVERS
SubstationNew Hampshire · CENTRAL MAINE POWER CO
THREE RIVERS is an electric transmission substation in New Hampshire, operated by CENTRAL MAINE POWER CO. It is classified as sub-transmission (115 kv) and connects 4 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #3778 | 115 kV | CENTRAL MAINE POWER CO | IN SERVICE | 19.6 mi |
| #5106 | 115 kV | — | IN SERVICE | 3.0 mi |
| #18844 | 115 kV | — | IN SERVICE | 6.1 mi |
| #19732 | 115 kV | CENTRAL MAINE POWER CO | IN SERVICE | 9.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of THREE RIVERS, 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 |
|---|---|---|---|---|---|---|---|
| ESSENTIAL POWER NEWINGTON LLC | Substation-Adjacent | NH | Rockingham County | 345 kV | 600 MW | 3.5 yrs | 73.1 |
| ELIOT | Substation-Adjacent | NH | Strafford County | 345 kV | 600 MW | 3.5 yrs | 72.0 |
| DEERFIELD | Substation-Adjacent | NH | Strafford County | 345 kV | 600 MW | 3.5 yrs | 71.6 |
| UNKNOWN132750 | Substation-Adjacent | NH | Rockingham County | 345 kV | 600 MW | 3.5 yrs | 71.2 |
| SOUTH GORHAM | Substation-Adjacent | ME | Cumberland County | 345 kV | 600 MW | 3.5 yrs | 70.9 |
| MAGUIRE ROAD | Substation-Adjacent | ME | York County | 345 kV | 600 MW | 3.5 yrs | 70.2 |
| TIMBER SWAMP | Substation-Adjacent | NH | Rockingham County | 345 kV | 600 MW | 3.5 yrs | 70.0 |
| MAGUIRE ROAD | Substation-Adjacent | ME | York County | 345 kV | 600 MW | 3.5 yrs | 69.4 |
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
This page shows a public slice of the GridCensus dataset for THREE RIVERS substation, New Hampshire. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.