RISER170959
SubstationDelaware · DELMARVA POWER
At a glance
RISER170959 is an electric transmission substation in Delaware, on DELMARVA POWER's transmission network. It is classified as unclassified and connects 1 transmission line. 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 |
|---|---|---|---|---|
| #173126 | — | DELMARVA POWER | IN SERVICE | 4.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of RISER170959, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN128222 | Substation-Adjacent | DE | Sussex County | 230 kV | 300 MW | 1.5 yrs | 62.1 |
| UNKNOWN128197 | Substation-Adjacent | DE | Sussex County | 230 kV | 300 MW | 1.5 yrs | 60.3 |
| UNKNOWN128236 | Substation-Adjacent | DE | Sussex County | 230 kV | 300 MW | 1.5 yrs | 59.5 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.9 |
| EC Near Indian River Generating Station | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.7 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.6 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.2 |
| UNKNOWN128195 | Substation-Adjacent | DE | Caroline County | 138 kV | 100 MW | 1.5 yrs | 57.2 |
Who owns the transmission lines at RISER170959?
The 1 connected line listed above is owned by DELMARVA POWER. Their combined recorded length is about 4.3 miles.
How do candidate sites near RISER170959 score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 62 on the 0–100 DC Readiness scale. They fall in Sussex County, Sussex, Caroline County. The Delaware average across 288 scored sites is 56.9. 73 of those Delaware sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to RISER170959 substation?
1 transmission line terminate at or pass through RISER170959 in the HIFLD line data. Together the listed lines cover about 4.3 miles.
Who owns RISER170959 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at RISER170959 belong to DELMARVA POWER. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is RISER170959 substation located?
RISER170959 is in Delaware at 38.5843, -75.2435. The datacenter candidate sites closest to it are in Sussex County, Sussex, Caroline County.
Are there datacenter candidate sites near RISER170959 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of RISER170959. The highest-scoring is UNKNOWN128222 at 62/100. Across Delaware, the average DC Readiness score is 56.9.
More in Delaware
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, “RISER170959 substation, Delaware”, https://gridcensus.com/substations/delaware/riser170959-f236b229 (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 RISER170959 substation, Delaware 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.