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Website · About · Legal · Privacy · Changelog · © 2026 Parisi Labs
  1. Home
  2. /Assets
  3. /Interties
  4. /Stegall DC tie
SPP logo

Stegall DC tie

SPP ↔ Western Interconnection · Back-to-back HVDC converter

A back-to-back converter in the Nebraska panhandle joining SPP to the Western Interconnection.

Now
107 MWSPP → Western Interconnection
SPP · as of Sep 25, 11:55 PM CDT
Between
SPP and Western Interconnection
Technology
Back-to-back HVDC converter
Published by
SPP
Open on the map

What it is carrying

Each operator's own reading, turned into a direction. Where both markets publish the tie, the two should agree.

As SPP reports it
107 MW · SPP → Western Interconnection

as of Sep 25, 11:55 PM CDT

Price across the seamReal-time · CDT
Reading prices…

Last 30 days

Hourly flow, signed so that up is power leaving the market.

As SPP reports it107MW
1240-124Aug 27, 1 PMSep 25, 11 PM

Above zero: SPP → Western Interconnection. Below: the reverse.

Hardware

Its terminals. US terminals are placed on the substation HIFLD's national dataset names for them.

Converter
Stegall, NE

41.8195, -103.9425 · 345 kV

Related interties

  • Miles City DC tie
    SPP ↔ Western Interconnection
  • Rapid City DC tie
    SPP ↔ Western Interconnection
  • Virginia Smith converter (Sidney)
    SPP ↔ Western Interconnection
  • Lamar DC tie
    SPP ↔ Western Interconnection
Usual direction
SPP → Western Interconnection in 72% of hours

72% out, 28% in, 0% idle across 683 hours

Average
34 MW · SPP → Western Interconnection
When busy
107 MW

95th percentile of hourly flow either way

Peak SPP → Western Interconnection
107 MW
Peak Western Interconnection → SPP
107 MW
Direction changes
41
The average day
0:006:0012:0018:0023:00
Mean flow by the market's local hour. Up: SPP → Western Interconnection. Down: Western Interconnection → SPP.