JEA wins state approval for 675-megawatt combined-cycle plant

The Florida Public Service Commission has approved JEA's case for additional electric generation capacity, clearing a major regulatory hurdle for a 675-megawatt combined-cycle power plant on Jacksonville's Northside. The decision announced August 18 keeps the project, designated SJRPP 3, on track for a 2031 launch date and represents the utility's largest investment in local generation in decades.

The plant will rise at the site of the former St. Johns River Power Park, where JEA shuttered coal-fired units in recent years as part of a long-term shift toward cleaner generation. The approval marks what JEA Interim Managing Director and CEO Jody Brooks called "a significant step forward in our commitment to providing Jacksonville residents with reliable, sustainable power for generations to come. "

What's happening

The Florida Public Service Commission granted JEA's "need determination" for the combined-cycle plant, a required regulatory finding under Florida law that utilities must secure before building large generation facilities. The approval confirms that JEA's forecast demand justifies the investment and that the proposed plant is a reasonable way to meet that need.

The plant will have a rated capacity of 675 megawatts and will be located at the former St. Johns River Power Park site on the Northside. JEA's Board of Directors previously approved the project in August 2025, and the utility is now targeting a 2031 in-service date.

Combined-cycle generation uses both a natural gas combustion turbine and a steam turbine in sequence. Exhaust heat from the gas turbine generates steam, which drives a second turbine, squeezing more electricity from the same volume of fuel. According to JEA, this design produces up to 50 percent more electricity from the same amount of natural gas compared to a traditional simple-cycle gas turbine, significantly lowering carbon dioxide emissions per megawatt-hour generated.

The new plant is intended to replace and augment electricity currently supplied by Northside Generating Station Unit 3, a 49-year-old natural gas unit. JEA cited the aging unit's efficiency and the need to keep pace with load growth as drivers for the project. The utility notes it has cut carbon emissions by 53 percent since 2007, primarily through the closure of the coal-fired St. Johns River Power Park and the decommissioning of a stake in Plant Scherer Unit 4, a coal plant in Juliette, Georgia.

What it means for Northeast Florida's electricity supply

The project directly addresses the supply challenge facing JEA as the region adds tens of thousands of new homes, apartments, and commercial developments. JEA serves more than one million residents across Duval, Clay, St. Johns, and Nassau counties, and the service territory has been among Florida's fastest-growing metro areas for the past decade.

Electric demand in the region has climbed steadily with population growth, the expansion of logistics and industrial facilities near JAXPORT and Cecil Commerce Center, and the arrival of energy-intensive data centers. Large new loads—such as the multi-hundred-megawatt service agreements that data centers typically require—can strain grid capacity if generation does not keep pace. A 675-megawatt plant represents a substantial addition to JEA's local generating fleet, enough to power hundreds of thousands of homes under typical conditions.

The combined-cycle design also addresses reliability during peak summer demand, when air conditioning drives Jacksonville's electric load to annual highs. Natural gas plants can be dispatched quickly to respond to demand spikes, and combined-cycle units offer better fuel efficiency than older simple-cycle peakers, which matters both for operating cost and emissions. Because JEA is a municipal utility that does not earn a profit, operating efficiency translates directly to what ratepayers ultimately pay per kilowatt-hour.

The Florida Public Service Commission's need determination is not a blank check—it affirms that the utility's load forecast and resource plan are reasonable, but JEA still must control construction costs and operate the plant efficiently to avoid rate pressure. The utility's ability to finance the project and recover costs through rates will be shaped by future commission proceedings as the plant moves toward completion.

Environmental and emissions context

JEA's decision to build a combined-cycle gas plant rather than renew coal generation or rely solely on simple-cycle combustion turbines reflects the ongoing national shift in electric generation. Combined-cycle plants emit roughly half the carbon dioxide per megawatt-hour of a coal plant and significantly less than older natural gas designs, making them a lower-emission option within the fossil-fuel category.

The utility's 53 percent emissions reduction since 2007 came primarily from closing the coal-fired St. Johns River Power Park units, which had been a fixture on the Northside since the 1980s. The new combined-cycle plant will occupy the same site, reusing existing utility infrastructure such as gas pipelines, transmission interconnections, and access to the St. Johns River for cooling water, all of which reduce the environmental footprint and permitting complexity compared to a greenfield site.

Still, any fossil-fuel generation facility brings emissions and water-use considerations. Combined-cycle plants require substantial cooling water, typically drawn from rivers or industrial ponds, and discharge warmer water back into the source. Permitting for such withdrawals and thermal impacts typically involves the St. Johns River Water Management District and the Florida Department of Environmental Protection. JEA has not disclosed detailed permitting timelines, but projects of this scale usually require multi-year environmental reviews.

The choice of natural gas as the fuel also ties JEA's long-term operating costs to the volatility of natural gas commodity markets. Florida utilities do not produce their own gas and must procure supply through pipelines originating in the Gulf Coast and beyond. Fuel-cost fluctuations are generally passed through to ratepayers under Florida regulatory rules, meaning that gas-price spikes—such as those seen during supply disruptions or severe winters—can show up in customer bills even if the plant itself operates efficiently.

What it means for the power-park site and the Northside

The St. Johns River Power Park site has been central to Jacksonville's electric supply for nearly half a century. The closure of the coal units left large parcels of industrial land, cooling ponds, transmission lines, and a riverfront location with deep-water access. Reusing the site for a new combined-cycle plant avoids the land-use and permitting hurdles of developing a new power-plant location and keeps generating capacity on the grid's Northside, where industrial and residential load is concentrated.

Construction of a 675-megawatt combined-cycle facility is a multi-year, capital-intensive project. Typical timelines for such plants involve site preparation, turbine and boiler installation, electrical and control-system integration, and commissioning. The construction phase will bring heavy equipment, concrete pours, steel erection, and hundreds of contractors to the site. Local construction employment will peak during the build-out, though operations jobs at a combined-cycle plant are typically fewer than at a coal plant—modern gas turbines are largely automated.

For nearby Northside neighborhoods, the facility's long-term presence means continued industrial activity along the river: truck traffic for maintenance and supplies, noise from turbines and cooling equipment, and visible steam plumes from cooling towers on cold mornings. However, combined-cycle plants generally produce less visible emissions and particulate matter than coal units, and air-quality impacts are subject to state and federal emissions permits.

The site's riverfront location also matters for flood risk and resilience. Power plants are critical infrastructure, and JEA must design the facility to withstand storm surge, riverine flooding, and hurricane-force winds. The St. Johns River is tidal and vulnerable to storm surge from Atlantic hurricanes tracking up the coast or making landfall to the south. Engineering standards for new generation assets in Florida now routinely incorporate higher flood-design elevations and hardened electrical switchgear to ensure the plant can restart quickly after a major storm.

What it means for ratepayers and JEA's finances

JEA is a municipal utility owned by the City of Jacksonville, meaning it does not answer to private shareholders and does not earn a profit. Capital investments like a new power plant are financed through municipal bonds, and the debt service is recovered through electric rates over the life of the asset. The Florida Public Service Commission does not set JEA's rates directly—JEA's board has that authority—but the commission's need determination provides regulatory backing that can reassure bondholders and keep borrowing costs down.

A project of this scale will likely cost hundreds of millions of dollars. JEA has not publicly disclosed a construction budget for SJRPP 3, but combined-cycle plants typically cost between 1,000and1,500 per kilowatt of capacity, depending on site conditions, interconnection costs, and environmental controls. At 675 megawatts, a rough estimate would place the project in the range of 675millionto1 billion, though actual costs will depend on competitive bidding for turbines, engineering, and construction management.

Ratepayers will ultimately fund that investment through their monthly bills. How much rates rise depends on JEA's overall rate structure, debt levels, fuel costs, and operational efficiency across its entire generation and distribution portfolio. Because the new plant replaces aging, less-efficient generation, JEA may avoid some of the rate pressure by retiring higher-cost units and lowering fuel expenses per megawatt-hour. The utility has historically pointed to fuel savings from efficiency projects as a way to moderate rate increases.

The key question for Jacksonville residents and businesses is whether the investment delivers long-term value: reliable power during peak demand, lower emissions than the aging units it replaces, and manageable rate impacts. The Public Service Commission's approval indicates regulators found JEA's case reasonable, but ratepayers and watchdog groups will have opportunities to scrutinize cost and performance as the project advances and JEA files future budget and rate documents with its board and the commission.

What happens next

With the need determination in hand, JEA will move forward with detailed engineering, procurement of major equipment such as turbines and generators, and final permitting. The utility has indicated the plant remains on schedule for a 2031 in-service date, which implies that major construction contracts and equipment orders will be finalized over the next year or two.

Key permits still to come likely include air-quality construction and operating permits from the Florida Department of Environmental Protection, water-withdrawal and discharge permits from the St. Johns River Water Management District and DEP, and stormwater and environmental-resource permits. Large generation projects in Florida also undergo reviews for compliance with federal Clean Air Act rules and, if they affect wetlands or navigable waters, U. S. Army Corps of Engineers permits.

JEA's board will continue to oversee project milestones, budgets, and major contract awards. Board meetings are public, and agendas typically include updates on capital projects of this magnitude. Ratepayers, business groups, and environmental advocates often attend or submit public comments during the board's monthly meetings, which are held at JEA headquarters on Talleyrand Avenue.

The utility has established a project webpage at jea. com/sjrpp3and4, where it plans to post updates, timelines, and answers to frequently asked questions. The naming convention—SJRPP 3 and 4—suggests JEA may be planning or contemplating a second unit at the same site, though the current approval covers only the 675-megawatt SJRPP 3 unit.

The timeline to 2031 is long, but it reflects the complexity and scale of modern power-plant construction. Turbines are custom-manufactured and have lead times measured in years; concrete curing, steel fabrication, and electrical integration cannot be rushed; and commissioning—bringing the plant online safely and testing it under load—takes months. Any delays in permitting, supply-chain disruptions, or construction setbacks could push the in-service date, so tracking progress through JEA's public updates will be important for understanding when the new capacity actually reaches the grid.

The bigger picture: powering Northeast Florida's growth

The SJRPP 3 approval is the latest evidence that Northeast Florida's rapid growth is reshaping the region's infrastructure in fundamental ways. The same residential and commercial boom that is filling subdivisions in Nocatee, SilverLeaf, and Wildlight, adding hundreds of apartment buildings across Jacksonville and St. Johns County, and drawing logistics warehouses and data centers to the I-95 and I-10 corridors is also forcing JEA to invest billions in generation, transmission, and distribution capacity.

Electric utilities plan in multi-decade horizons. The decision to build a 675-megawatt plant today reflects JEA's forecast that demand will climb steadily through the 2030s as the region adds population and economic activity. If the forecast proves accurate, the plant will be a linchpin of reliable summer peak supply. If growth slows or distributed solar and battery storage reduce demand more than expected, the utility will carry the fixed costs of a large, underutilized asset—a risk that ratepayers ultimately bear.

For now, the Florida Public Service Commission's approval signals confidence that JEA's planning is sound. The plant represents a bet on the combined-cycle technology that has become the workhorse of American power generation over the past two decades: cleaner than coal, more efficient than simple-cycle gas, and flexible enough to complement renewable resources as wind and solar grow. How well that bet pays off for Jacksonville residents will become clear in the decades after the turbines begin spinning in 2031.