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Grid Storages in United States

The United States has 101 grid storages mapped on the OverWatts open energy atlas — the 2nd-largest fleet of the 58 countries that hold any, and 10% of the world's mapped total. Of these, 37 operating and 63 under construction or proposed. The largest is Red Lake Pumped hydroelectric plant (3.0 GW).

The largest owner-operators are PacifiCorp (11), Premium Energy (9) and rPlus Hydro LLLP (7) — PacifiCorp alone is named on 11% of them. Half of United States's grid storages in service predate 1973 (median commissioning year of the 37 with a known date) and the oldest still listed is Mormon Flat hydroelectric plant, dating from 1926. 63 are in the pipeline, led by Red Lake Pumped hydroelectric plant (3.0 GW), proposed.

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101
Grid Storage in United States
#2
of 58 countries
63
In construction / proposed

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Largest grid storages in United States

Who owns United States's grid storages

Counts an asset once per company named as its owner or operator; a joint venture counts for each partner.

When they were built

Median commissioning year 1973 · oldest Mormon Flat hydroelectric plant (1926) · newest Richard B. Russell Pumped Storage hydroelectric plant (2002) · 37 of 101 carry a start date

Under construction & proposed

How United States compares · grid storages by country

Frequently asked

How many grid storages are there in United States?
OverWatts maps 101 grid storages in United States — 10% of the world's mapped total, the 2nd-largest national fleet of the 58 countries with any.
What is the largest grid storage in United States?
Red Lake Pumped hydroelectric plant, at 3.0 GW.
Who owns the grid storages in United States?
PacifiCorp is named as owner or operator on the most — 11 of 101 (11%). Next are Premium Energy (9), rPlus Hydro LLLP (7) and Rye Development LLC (5).
How old are United States's grid storages?
The median commissioning year is 1973, across the 37 in service with a known start date. The oldest still listed is Mormon Flat hydroelectric plant (1926).
What new grid storages are being built in United States?
63 projects are under construction or proposed. The largest are Red Lake Pumped hydroelectric plant (3.0 GW), Escondido Canyon Pumped hydroelectric plant (2.0 GW) and Isabella Pumped Storage hydroelectric plant (2.0 GW).

Other asset classes in United States

Power Plant 3,831Oil & Gas Field 1,894Pipeline 620Coal / Uranium Mine 599LNG Terminal 176Interconnector 159Cement Plant 100Iron & Steel Plant 90Export Terminal 74Chemical Plant 64Refinery 32Data Centre 25

Grid Storages in other countries

China 401India 86Japan 35Spain 35Austria 26Germany 25Australia 23Italy 23Philippines 21South Korea 18Switzerland 17Portugal 14