Webb: 100 MW Battery Interconnection Request S1116

EnergyPosted 10/18/202610/18/2026 at 10:46 pm

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Webb: 100 MW Battery Interconnection Request S1116

Starts 06/01/2027

Webb Clean Energy Storage Center, US Highway 49E Corridor, Webb, Tallahatchie County, MS 38966

To map

Factory buildout

Announced

Energy: battery storage · Checked 2026-10-30

Announced
Under construction
Commissioning
Commercial production

Only the reported stage is highlighted. Figures and dates retain their planned or demonstrated status.

Production capacityPlanned: 100 MW battery storage request; preliminary interconnection scope, not measured output.
Source
MISO interconnection queue — S1116
“"poiName":"WEBB","summerNetMW":100.0”
Production targetPlanned: 2027-06-01; requested date only, not an achieved opening.
Source
MISO interconnection queue — S1116
“"projectNumber":"S1116","queueDate":"2025-08-31T04:00:00+00:00","inService":"2027-06-01T04:00:00+00:00"”
Project stagePlanned: Active; queue status does not establish physical construction or commercial service.
Source
MISO interconnection queue — S1116
“"applicationStatus":"Active","sisPhase1":"","postGIAStatus":""”

Project timeline

2025-08-31Demonstrated
Interconnection request received
Source
MISO interconnection queue — S1116
“"projectNumber":"S1116","queueDate":"2025-08-31T04:00:00+00:00"”
2027-06-01Planned
Requested in-service date
Source
MISO interconnection queue — S1116
“"projectNumber":"S1116","queueDate":"2025-08-31T04:00:00+00:00","inService":"2027-06-01T04:00:00+00:00"”

Alternate names

BESS
Alias
MISO
Alias

Updates

1 since posted

This pin follows the news: it shows what is known now, and here is what changed and what brought it.

Edited10/30/2026 at 3:39 pmby @ThePinGang
Headline
~~Webb Clean Energy Storage Center: 120M USD,~~Webb: 100 MW ~~BESS in Tallahatchie County, Mississippi~~Battery Interconnection Request S1116
Lede
rewritten 30 added, 44 removed
~~MISO regional transmission interconnection development of the Webb Clean Energy Storage Center in Tallahatchie County, Mississippi. Delivering~~S1116 is a 100 MW ~~/ 400 MWh of utility-scale lithium-ion battery storage, the facility connects to the 115 kV Webb substation to balance Delta solar generation and reinforce regional grid reliability.~~battery storage interconnection request in Tallahatchie, MS. The grid operator lists its queue status as Active. The requested in-service date is 2027-06-01; this is a planning date.
Cost
$120Mnone
Summary
rewritten 71 added, 92 removed
~~Entergy Mississippi advanced MISO interconnection filings for the Webb Clean Energy Storage Center in Tallahatchie County, Mississippi. Delivers~~S1116 is a 100 MW ~~/ 400 MWh of four-hour lithium-ion utility~~ battery storage capacity. Represents an estimated 120 million USD clean grid infrastructure investment in the Mississippi Delta. Interconnects directly with the 115 kV Webb substation along the US Highway 49E transmission corridor. Stores utility-scale Delta solar output to provide peak-hour dispatchable capacity and regional voltage stability. Timeline: planned utility-scale battery storage project targeting commercial operation in June 2027 (estimated) per MISO generator interconnection queue and Mississippi PSC resource filings.interconnection request in Tallahatchie, MS. The grid operator lists its queue status as Active. The requested in-service date is 2027-06-01; this is a planning date. The point of interconnection is WEBB. Queue processing status does not establish physical construction or commercial operation. No exact-scope construction budget is published in the cited grid record. Battery power is distinct from stored energy; no four-hour duration or battery MWh is inferred.
- MISO interconnection queue — S1116misoenergy.org95% CONFIDENCE

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References 395% CONFIDENCEOverall confidence: 95%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

[1]95%
MISO interconnection queue — S1116
misoenergy.org· Added Oct 30, 2026· Added by@ThePinGang· 93% of score
[2]94%
Mississippi Public Service Commission: MISO Queue Storage Interconnection Review
psc.state.ms.us· Published Jul 18, 2024· 4% of score
[3]96%
Entergy Mississippi: Webb Clean Energy Storage Center Overview
entergy-mississippi.com· Published Jun 10, 2024· 3% of score

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Webb: 100 MW Battery Interconnection Request S1116

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