NPPD Breaks Ground on 694-MW Princeton Road Station - Nebraska's Largest Gas Plant

Nebraska Public Power District broke ground on Princeton Road Station on July 17, 2026, marking the start of construction on what will become the largest natural gas generation facility in the utility's fleet^[1]. The ceremony drew state and local officials, community stakeholders, and NPPD staff to the site just north of Hallam, in southern Lancaster County^[1].

The numbers are straightforward: 694 MW of dual-fuel capacity, a June 2029 target in-service date, and an estimated total project cost of $3.1 billion including transmission^[1]. NPPD plans to fund the build through long-term bonds, with repayment built into electric rates over time, and expects increased revenue from load growth to help offset those costs^[1].

Photo: Alex Simpson / Unsplash

The Machine Room: Two Technologies, One Site

Princeton Road Station is not a single-technology plant. The facility will combine two Siemens Energy F-class combustion turbines rated at a combined 478 MW with 12 Wärtsilä reciprocating internal combustion engines (RICE units) totaling 216 MW^[1]. Burns & McDonnell is serving as the engineer-procure-construct (EPC) contractor.

Both technology blocks are dual-fuel - primary natural gas, with diesel as a backup - giving the plant fuel-supply resilience that a single-fuel design would not^[1]. NPPD selected the CT-plus-RICE combination after evaluating cost, risk, environmental attributes, operating flexibility, and accredited capacity against its existing generation mix^[1].

The fast-start capability of both technology types is the operational logic behind the pairing. RICE units can respond to grid fluctuations in seconds, making them effective at both baseload and peaking roles. Combustion turbines in simple-cycle configuration can also ramp quickly, though they are better suited to sustained mid-merit dispatch. Together, the two blocks give NPPD a plant that can follow load across a wide range of conditions - useful in a grid where renewable penetration is rising and the residual demand curve is becoming steeper and less predictable.

Why 694 MW, and Why Now

NPPD first announced plans to build new generation assets in February 2024, and the project has been in development for over two years. The demand signal driving it is not subtle.

Nebraskans are dealing with rising demands for electricity, driven in large part by data centers for artificial intelligence. Nebraska's energy system faces a critical turning point: while the state has long benefited from some of the nation's most affordable and reliable electricity, surging demand driven by data centers, manufacturing, and industrial agriculture threatens to outpace supply.

The scale of the shift is visible at the utility level. NPPD is installing nearly 700 MW of natural gas-powered generating capacity at Princeton Road Station and plans a similar-sized expansion in Beatrice in the early 2030s - combined, roughly equal to the generating capacity of Nebraska's largest power plant, Gerald Gentleman Station near Sutherland.

Agriculture and industrial processing are also pulling harder on the grid. Nebraska's demand for electricity is continuing to grow, with many of the state's existing companies looking to expand and new companies - particularly those within or related to the agriculture industry - interested in establishing operations in Nebraska communities.

Financing and Rate Implications

The $3.1 billion figure covers generation and transmission together. NPPD has been explicit that the cost will flow through to rates, though it argues that load growth will partially offset the impact through additional revenue^[1].

After holding retail prices steady for 11 years, NPPD increased rates by 2% for 2025 and will increase them by another 3% in 2026. Princeton Road Station's bond repayment will layer on top of that trajectory. For planners and regulators watching the rate path, the utility's bet is that new large-load customers - data centers, agricultural processors, and industrial facilities - will absorb enough of the incremental cost to keep residential bills manageable.

Ensuring reliable electricity supply is a major policy challenge in Nebraska, with several legislative proposals introduced during the 2026 session addressing concerns about the availability of dispatchable generation resources - power sources that can be turned on and off as needed to meet demand. Princeton Road Station is NPPD's direct answer to that concern.

Permitting and Environmental Obligations

Construction is underway, but the regulatory calendar is not closed. The project still requires environmental permitting: NPPD must obtain a pre-construction air permit and, within a year of the plant entering service, apply for an operating permit from the Lincoln-Lancaster County Health Department. Emissions will need to meet EPA ambient air standards, verified through air dispersion modeling, and NPPD will be required to install state-of-the-art emissions control technology.

On the water side, NPPD is working with the state of Nebraska and the local Natural Resources District to secure well permits for plant operations, cooling, and potable use; the NRD will issue drilling permits, with the wells subsequently registered with the state.

The air permit application was submitted to the Lincoln-Lancaster County Health Department in May 2025, with modifications filed in October 2025 and February 2026^[1]. That timeline suggests NPPD expects the pre-construction permit to clear before the construction schedule demands it - but it remains an open item.

What This Means for the SPP Footprint

NPPD operates within the Southwest Power Pool (SPP) and submitted its interconnection application to SPP in fall 2023. Princeton Road Station will connect to that grid via new transmission infrastructure included in the $3.1 billion total cost estimate.

NPPD serves approximately 530,000 Nebraskans through retail and wholesale electric service. Adding 694 MW of fast-responding, dispatchable capacity strengthens the utility's ability to meet both its own load obligations and any wholesale commitments within SPP - particularly during summer peak periods when demand from agricultural cooling and data center operations is highest.

Princeton Road Station is expected to create approximately 32 permanent jobs once operational.

The three-year construction window - 2026 through a June 2029 in-service date - is tight but not unprecedented for a project of this type. Burns & McDonnell completed a comparable dual-technology build for Basin Electric Power Cooperative (Pioneer Generation Station Phase IV, ~560 MW of Siemens F-class CTs and Wärtsilä RICE units) on schedule and under budget in October 2025, which gives NPPD some confidence in the EPC model it has chosen.

The plant will not retire anything in NPPD's existing fleet. NPPD does not have any plans to retire any of its generation facilities; Princeton Road Station will complement the existing fleet and strengthen the utility's ability to provide low-cost, reliable electricity to Nebraskans now and in the future.

That is the core planning logic: a state whose electricity demand is accelerating faster than at any point in recent memory needs dispatchable capacity that can be built in three years, fueled from existing infrastructure, and operated flexibly alongside a growing renewable portfolio. Princeton Road Station is NPPD's answer to that equation - and at 694 MW, it is the largest single answer the utility has ever built.