Summary
Southern Star has scheduled station maintenance at Blackwell CS (loc 445511) beginning September 23, 2026 and running through October 21, 2026 -- approximately 28 days. The notice states 500,000 Dth/d (0.500 Bcf/d) of throughput at this location will be affected. Live capacity data for the evening cycle on 2026-09-22 shows Blackwell CS (loc_id 445511, R:MLQ) operating at 0.670 Bcf/d with 0.454 Bcf/d scheduled and 0.215 Bcf/d of headroom, meaning the outage represents roughly 75% of currently scheduled flow through this compressor.
Trading note
Southern Star Blackwell CS maintenance removes 0.500 Bcf/d of Midcontinent throughput capacity from September 23 through October 21; Southern Star basis has been running at -0.540 vs Henry Hub most recently (2026-09-21), and this constraint on a key compressor station should pressure Midcontinent supply and support a narrowing of the Southern Star discount or shift volumes to PEPL and ANR alternatives.
Reroute potential
Moderate: ANR (monitored), PEPL (monitored), and TIGT (monitored) serve overlapping Midcontinent markets and can absorb some diverted Anadarko/Hugoton supply, though a 0.500 Bcf/d constraint over 28 days will likely saturate available alternate capacity on at least some days.
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View original notice text (as posted by Southern Star)
TSP Name: Southern Star
Notice ID: 11226
Notice Type: Planned Service Outage
Status: Supersede
Post Date: 2026-09-22T08:28:37.673
Effective Begin: 2026-09-22T08:28:37.673
Effective End: None
Subject: Planned Service Outage - September 22nd, 2026
Southern Star’s 2026 “Planned Service Outage” has been posted to the “Notices” area under the Planned Service Outage category and includes upcoming planned maintenance scheduled for this year. Changes to this schedule are always possible and will be posted to the bulletin board as soon as firm dates are known.
New (1)
The Station maintenance at our Blackwell CS is scheduled to begin September 23rd, 2026, and Return to service October 21st, 2026. The following customers will be affected: 500,000 dth/d Blackwell CS (location 445511).
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Planned Service Outage
PSO PDF
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PSO
Scott Warren Office: 270.852.4559 Cell: 270.302.6433
Buster Ashley Office: 270.852.4546 Cell: 270.314.1436
