COLONIAL HILLS
SubstationMinnesota · NORTHERN STATES POWER CO - MINNESOTA
At a glance
COLONIAL HILLS is an electric transmission substation in Minnesota, on NORTHERN STATES POWER CO - MINNESOTA's transmission network. It is classified as distribution (69–115 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
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #115142 | 69 kV | NORTHERN STATES POWER CO - MINNESOTA | IN SERVICE | 2.4 mi |
| #172792 | 69 kV | NORTHERN STATES POWER CO - MINNESOTA | IN SERVICE | 0.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of COLONIAL HILLS, 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 |
|---|---|---|---|---|---|---|---|
| BLUE LAKE | Substation-Adjacent | MN | Scott County | 345 kV | 600 MW | 4.3 yrs | 69.5 |
| PARKERS LAKE | Substation-Adjacent | MN | Hennepin County | 345 kV | 600 MW | 4.3 yrs | 69.5 |
| TERMINAL | Substation-Adjacent | MN | Ramsey County | 345 kV | 600 MW | 4.3 yrs | 69.4 |
| EDEN PRAIRIE | Substation-Adjacent | MN | Hennepin County | 345 kV | 600 MW | 4.3 yrs | 69.4 |
| SCOTT CO | Substation-Adjacent | MN | Scott County | 345 kV | 600 MW | 4.3 yrs | 69.1 |
| UNKNOWN129414 | Substation-Adjacent | MN | Anoka County | 345 kV | 600 MW | 4.3 yrs | 68.6 |
| UNKNOWN129614 | Substation-Adjacent | MN | Hennepin County | 345 kV | 600 MW | 4.3 yrs | 68.5 |
| MAXWELL | Substation-Adjacent | MN | Ramsey County | 345 kV | 600 MW | 4.3 yrs | 68.1 |
How does COLONIAL HILLS compare with other substations in Minnesota?
Minnesota has 2,357 substation records in HIFLD, of which 208 carry a station name; the rest are unnamed tap points, risers and line ends. 46 named substations in the state are in COLONIAL HILLS's 69–114 kV band (22% of named stations). 154 sit in a higher band. 30 named substations in Minnesota operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 115 kV.
Who owns the transmission lines at COLONIAL HILLS?
The 2 connected lines listed above are owned by NORTHERN STATES POWER CO - MINNESOTA. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 3.3 miles.
How do candidate sites near COLONIAL HILLS score?
The 8 highest-scoring candidate sites within about 25 miles range from 68 to 70 on the 0–100 DC Readiness scale. They fall in Scott County, Hennepin County, Ramsey County, Anoka County. The Minnesota average across 3,216 scored sites is 55.7. 1,270 of those Minnesota sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is COLONIAL HILLS substation?
COLONIAL HILLS has a maximum voltage of 69 kV. That places it in the 69–114 kV band. The median named US substation in this dataset is 115 kV, so COLONIAL HILLS is below the national midpoint.
How many transmission lines connect to COLONIAL HILLS substation?
2 transmission lines terminate at or pass through COLONIAL HILLS in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 3.3 miles.
Who owns COLONIAL HILLS substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at COLONIAL HILLS belong to NORTHERN STATES POWER CO - MINNESOTA. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is COLONIAL HILLS substation located?
COLONIAL HILLS is in Minnesota at 44.7483, -93.2925. The datacenter candidate sites closest to it are in Scott County, Hennepin County, Ramsey County.
Are there datacenter candidate sites near COLONIAL HILLS substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of COLONIAL HILLS. The highest-scoring is BLUE LAKE at 70/100. Across Minnesota, the average DC Readiness score is 55.7.
Other 69 kV substations in Minnesota
- BLUE EARTH· 4 lines
- RED WING· 4 lines
- SPRING VALLEY· 4 lines
- WINTHROP· 4 lines
- BECKER· 3 lines
- FARMINGTON· 3 lines
- NORTHFIELD· 3 lines
- OTSEGO· 3 lines
- All named substations in Minnesota· 208 stations
- Datacenter candidate sites in Minnesota· 3,216 sites
- Brownfield and retired plant sites in Minnesota
- Substations by state
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “COLONIAL HILLS substation, Minnesota”, https://gridcensus.com/substations/minnesota/colonial-hills-e080b588 (data as of June 29, 2026).
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
Every site and score for COLONIAL HILLS substation, Minnesota is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.