MARBLE TIE
SubstationTennessee · DUKE ENERGY CAROLINAS, LLC
MARBLE TIE is an electric transmission substation in Tennessee, operated by DUKE ENERGY CAROLINAS, LLC. It is classified as sub-transmission (138 kv) and connects 2 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 |
|---|---|---|---|---|
| #57070 | 161 kV | DUKE ENERGY CAROLINAS, LLC | IN SERVICE | 16.9 mi |
| #57071 | 161 kV | DUKE ENERGY CAROLINAS, LLC | IN SERVICE | 16.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MARBLE TIE, 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 |
|---|---|---|---|---|---|---|---|
| WELLSVILLE | Substation-Adjacent | TN | Blount County | 161 kV | 100 MW | 3.7 yrs | 67.5 |
| TAP144720 | Substation-Adjacent | NC | Swain County | 161 kV | 100 MW | 3.7 yrs | 66.2 |
| UNKNOWN109616 | Substation-Adjacent | NC | Cherokee County | 161 kV | 100 MW | 3.7 yrs | 66.0 |
| TAP152045 | Substation-Adjacent | TN | Monroe County | 161 kV | 100 MW | 3.7 yrs | 65.9 |
| ROBBINSVILLE SWITCHING STATION | Substation-Adjacent | NC | Graham County | 161 kV | 100 MW | 3.7 yrs | 65.7 |
| TAP169811 | Substation-Adjacent | NC | Macon County | 161 kV | 100 MW | 3.7 yrs | 65.5 |
| UNKNOWN109557 | Substation-Adjacent | NC | Macon County | 161 kV | 100 MW | 3.7 yrs | 65.4 |
| TAP145812 | Substation-Adjacent | NC | Cherokee County | 161 kV | 100 MW | 3.7 yrs | 65.4 |
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 MARBLE TIE substation, Tennessee. 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.