Allatoona Substation #10

Allatoona Substation #10 is a 10 MW battery storage project in Cobb County, Georgia, operated by Cobb Electric Membership Corporation. EIA-860M lists 1 generating unit here. Its unit entered service in 2026.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity
10 MW
10 MW net summer
Generating units
1
In service
2026
EIA plant ID
69688

Where it is

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County
Cobb County, Georgia
Coordinates
34.0868, -84.7188
Balancing authority
SOCO
Sector
Electric Utility

Units, technology and status

Operator of record
Cobb Electric Membership Corporation
Primary energy source
Battery
Technologies
Batteries
Status
Operating

Every plant Cobb Electric Membership Corporation reports to EIA →

Allatoona Substation #10: FAQ

Where is Allatoona Substation #10?
In Cobb County, Georgia (GA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Allatoona Substation #10?
10 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Allatoona Substation #10?
EIA-860M names Cobb Electric Membership Corporation as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Allatoona Substation #10 LLC?
Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Cobb Electric Membership Corporation here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Allatoona Substation #10 LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Allatoona Substation #10 still running?
EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.