Double Back Diamond

OperatingSolar

Ranked #2 of 388 Solar plants in IL#23 of 7790 nationally

592.8 MW Solar operating in Sangamon, IL — Midcontinent Independent Transmission System Operator, Inc..

EIAGEM

592.8 MW

Nameplate Capacity

Generators

unit

Solar Photovoltaic

Technology

2024

Operating Since

Location

Coordinates

39.5373, -89.8098

County

Sangamon, IL

Nearby Plants

Lotus Wind
Wind200 MW · 11.2 km
Lincoln Land Energy Center
Natural Gas1276.8 MW · 20.2 km
USS Solar Brick
Solar2 MW · 21.0 km

Status

Project statusOperationalSolar Power World · 2025-05-01

Latest milestoneconstruction start · 2023-03Power Technology · 2023-10-13

Expected CODQ4 2024Power Technology · 2023-10-13

Ownership & Operator

Owner data does not fully agree across sources.

EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.

Field	EIA	GEM	Wikidata
Operator	Double Back Diamond Solar Power, LLC	Swift Current Energy	—
Owner(s)	Double Back Diamond Solar Power, LLC	Swift Current Energy	—
Status	Operating	operating	—

Ownership Chain

GEM identifies the owner as Swift Current Energy

This entity is not yet in the GEM ownership database — chain unavailable.

DeveloperSwift Current EnergyPower Technology · 2023-10-13

PartnerConstellationGrist · 2025-01-02

CompanyCity of ChicagoGrist · 2025-01-02

About

The Double Back Diamond solar power plant is located in Sangamon County, Illinois. The plant, owned and operated by Double Back Diamond Solar Power, LLC, has a total capacity of 592.8 MW and commenced operations in 2024. It utilizes solar photovoltaic technology with single-axis tracking. The plant is interconnected to the Midcontinent Independent Transmission System Operator, Inc. (MISO) balancing authority within the SERC NERC region.

Double Back Diamond is the second-largest solar plant in Illinois out of 19, and ranks twelfth nationally among 639 solar facilities. In its latest year of operation, the plant generated 914,857 MWh of electricity, achieving a capacity factor of 17.6%. Financial data is available for the plant from LBNL, though specific figures are not provided.

Generated from EIA, GEM, and public data sources

EIA Plant Profile Global Energy Monitor

Engineering & Generators

EPC contractorMcCarthy Building CompaniesNS Energy · 2023-05-02