Substation Scout

Seaway BESS

ERCOT queue ID 26INR0773

Queue ID26INR0773
Project nameSeaway BESS
Status (as published)In Queue
SubstationTSP Substation Name - Seaway TSP Substation Code - Seaway Load Name/Load Transformer Name - LOAD_T-4 Bus # / PTI Bus Number: Voltage (Transmission level Kv) - Node (associated w/ load/load XFMR in NMMS)
Point of interconnectionTSP Substation Name - Seaway TSP Substation Code - Seaway Load Name/Load Transformer Name - LOAD_T-4 Bus # / PTI Bus Number: 57670 Voltage (Transmission level Kv) - 138kV Node (associated w/ load/load XFMR in NMMS) - 0009
CountyWaller
StateTX
Voltage138 kV
Capacity9.9 MW
Resource (as published)OTH/BA
Resource categoryBattery (normalised for filtering)
Target commercial operation2027-02-22
Source datasetsmall

Tracked changes

No changes to this filing observed since ERCOT tracking began on August 27, 2026. Full change log →

Additional filed fields

Interconnecting EntityMount Whitney Energy Storage LLC
Cdr ZoneHOUSTON
Fuel CodeOTH
Technology CodeBA
Ia Signed45637

Fields shown are those promoted into this dataset. The original ISO filing may contain further columns (study reports, agreement dates, milestone flags) that are retained in the pipeline but not all surfaced here. Always confirm against the ISO's published queue before relying on any value.