MASON
SubstationMaine · CENTRAL MAINE POWER CO
MASON is an electric transmission substation in Maine, operated by CENTRAL MAINE POWER CO. It is classified as high-voltage (345 kv) and connects 5 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 |
|---|---|---|---|---|
| #49269 | 345 kV | CENTRAL MAINE POWER CO | IN SERVICE | 3.6 mi |
| #5525 | 115 kV | CENTRAL MAINE POWER CO | IN SERVICE | 23.9 mi |
| #6833 | 115 kV | CENTRAL MAINE POWER CO | IN SERVICE | 16.9 mi |
| #33706 | 115 kV | CENTRAL MAINE POWER CO | IN SERVICE | 11.1 mi |
| #46942 | 115 kV | CENTRAL MAINE POWER CO | IN SERVICE | 6.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MASON, 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 |
|---|---|---|---|---|---|---|---|
| TAP136734 | Substation-Adjacent | ME | Sagadahoc County | 115 kV | 100 MW | 3.5 yrs | 64.9 |
| Greenfield (LARRABEE ROAD - COOPERS MILLS) | Greenfield | ME | Kennebec County | 345 kV | 600 MW | 3.5 yrs | 63.6 |
| Greenfield (SURROWIEC - MAINE YANKEE) | Greenfield | ME | Sagadahoc County | 345 kV | 600 MW | 3.5 yrs | 63.4 |
| UNKNOWN133734 | Substation-Adjacent | ME | Androscoggin County | 115 kV | 100 MW | 3.5 yrs | 63.4 |
| Greenfield (COOPERS MILLS - MAINE YANKEE) | Greenfield | ME | Lincoln County | 345 kV | 600 MW | 3.5 yrs | 63.2 |
| Greenfield (COOPERS MILLS - MAINE YANKEE) | Greenfield | ME | Lincoln County | 345 kV | 600 MW | 3.5 yrs | 62.9 |
| UNKNOWN133409 | Substation-Adjacent | ME | Sagadahoc County | 115 kV | 100 MW | 3.5 yrs | 62.5 |
| PUDDLEDOCK RD | Substation-Adjacent | ME | Kennebec County | 115 kV | 100 MW | 3.5 yrs | 62.3 |
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 MASON substation, Maine. 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.