Double Back Diamond
Double Back Diamond Solar Power, LLCSangamon County
Aerial view of Double Black Diamond Solar and its on-site substation.
Source: McCarthy Building CompaniesDouble Black Diamond is an operating 592.8 MW AC / 800 MW DC solar plant west of Springfield, Illinois. Swift Current Energy identifies itself as the project's long-term owner and operator, and announced commercial operation on April 30, 2025. McCarthy built the facility with more than 1.6 million U.S.-made solar modules.
Mapped infrastructure geometry associated with this asset.
EIA plant 66624 · Inventory for Aug 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| DBD | Solar Photovoltaic | Operating | 592.8 | Unknown |
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| DBD | 592.8 MW 592.8 MW summer | Solar Photovoltaic Solar · PV | Nov 2024 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
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Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
McCarthy Building Companies began construction as the engineering, procurement, and construction provider.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
Swift Current Energy secured $779 million in project financing: $695 million in construction and tax equity bridge loans and $84 million letter of credit facility. Mitsubishi UFJ Financial Group (MUFG), Societe Generale, and Truist served as coordinating lead arrangers; ING as green loan structuring agent; Wilmington Trust as collateral and depositary agent.
Google closed a tax equity investment for the 800 MWdc (593 MWac) facility utilizing Inflation Reduction Act energy-community and domestic-content adders.
EIA-860 lists generator DBD with this operating date.
Double Black Diamond Solar project announced as now operating. Project completion ceremony held with local leaders, project landowners, and customers. Over 1 million safe person-hours of construction work completed. Project created approximately 500 jobs during construction.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Double Back Diamond reports 592.8 MW solar of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.
Double Back Diamond is a Solar Photovoltaic facility in Sangamon County, IL, participating in the MISO market.
Double Back Diamond is in Sangamon County, IL, inside the MISO balancing area.
Double Back Diamond is operated by Double Back Diamond Solar Power, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Double Back Diamond reported 1,050.5 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, Double Back Diamond ranks #4 of 7,597 operating plants of the same technology nationally. It ranks #1 of 456 in IL.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.