SEMASS TAP
SubstationMassachusetts
SEMASS TAP is an electric transmission substation in Massachusetts. It is classified as sub-transmission (115 kv) and connects 3 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 & operation
Operator not catalogued for this substation.
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #2125 | 115 kV | — | IN SERVICE | 1.0 mi |
| #24587 | 115 kV | — | IN SERVICE | 7.3 mi |
| #42887 | 115 kV | — | — | 0.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SEMASS TAP, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN133428 | Substation-Adjacent | MA | Plymouth County | 345 kV | 600 MW | 3.5 yrs | 68.1 |
| HOLBROOK | Substation-Adjacent | MA | Norfolk County | 345 kV | 600 MW | 3.5 yrs | 65.6 |
| HATHAWAY STREET | Substation-Adjacent | MA | Bristol County | 115 kV | 100 MW | 3.5 yrs | 65.5 |
| STOUGHTON | Substation-Adjacent | MA | Norfolk County | 345 kV | 600 MW | 3.5 yrs | 65.2 |
| PILGRIM NUCLEAR POWER STATION | Substation-Adjacent | MA | Plymouth County | 345 kV | 600 MW | 3.5 yrs | 65.1 |
| CARVER | Substation-Adjacent | MA | Plymouth County | 345 kV | 600 MW | 3.5 yrs | 65.1 |
| TAP135387 | Substation-Adjacent | MA | Bristol County | 115 kV | 100 MW | 3.5 yrs | 64.8 |
| TAP135423 | Substation-Adjacent | MA | Plymouth County | 345 kV | 600 MW | 3.5 yrs | 64.5 |
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 SEMASS TAP substation, Massachusetts. 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.