FLAT ROCK
SubstationNew York · NIAGARA MOHAWK POWER CORP.
FLAT ROCK is an electric transmission substation in New York, operated by NIAGARA MOHAWK POWER CORP.. 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #2436 | 115 kV | NIAGARA MOHAWK POWER CORP. | IN SERVICE | 24.9 mi |
| #33331 | 115 kV | NIAGARA MOHAWK POWER CORP. | — | 0.0 mi |
| #45827 | 115 kV | NIAGARA MOHAWK POWER CORP. | IN SERVICE | 1.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of FLAT ROCK, 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 |
|---|---|---|---|---|---|---|---|
| Greenfield (MASSENA - MARCY) | Greenfield | NY | St. Lawrence County | 765 kV | 1,000 MW | 3.5 yrs | 63.7 |
| Greenfield (MASSENA - MARCY) | Greenfield | NY | Lewis County | 765 kV | 1,000 MW | 3.5 yrs | 63.7 |
| Greenfield (MASSENA - MARCY) | Greenfield | NY | St. Lawrence County | 765 kV | 1,000 MW | 3.5 yrs | 63.4 |
| Greenfield (MASSENA - MARCY) | Greenfield | NY | St. Lawrence County | 765 kV | 1,000 MW | 3.5 yrs | 62.2 |
| ADIRONDACK | Substation-Adjacent | NY | Lewis County | 230 kV | 300 MW | 3.5 yrs | 62.0 |
| Greenfield (MASSENA - MARCY) | Greenfield | NY | St. Lawrence County | 765 kV | 1,000 MW | 3.5 yrs | 61.7 |
| TAP140319 | Substation-Adjacent | NY | St. Lawrence County | 115 kV | 100 MW | 3.5 yrs | 61.3 |
| COLTON | Substation-Adjacent | NY | St. Lawrence County | 115 kV | 100 MW | 3.5 yrs | 61.3 |
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 FLAT ROCK substation, New York. 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.