A power line dreamed up in 2006 finally switched on this week

Climate & Energy 3 min 2 sources

After roughly 18 years of permits, a Pentagon objection, and lawsuits, the $11 billion SunZia line went live — carrying New Mexico wind to a million homes, and showing how slowly the grid actually changes.

Key takeaways

The $11 billion SunZia power line went fully online this week, carrying New Mexico wind to about a million homes after roughly 18 years of permits, a Pentagon objection, and lawsuits.
The hard part of clean energy isn't building turbines — it's building the long-distance wires that carry the power to cities, which can take two decades to permit.
The grid being built today reflects decisions locked in long ago; a corridor chosen in 2006 will steer where power flows for half a century.

A 550-mile power line first sketched out in 2006 came fully online this week. SunZia — an $11 billion wind-and-transmission project, one of the largest clean-energy lines the United States has ever built — is now moving electricity from New Mexico to Arizona and the wider Southwest [0]. It can carry up to 3,000 megawatts, enough for roughly a million homes [0].

The headline number is the wind: a 3.65-gigawatt farm with 916 turbines in central New Mexico [0]. But the quieter story is the wire. Wind in an empty desert is worthless until something carries it to where people live. SunZia is that something — and building it took the better part of two decades.

How long “online” actually took

The idea started at a regional energy conference in the summer of 2006. The first federal application went in around 2008, with an early completion target of 2013. It came online in 2026 — close to eighteen years behind its own first plan.

The delay wasn’t one thing. It was many, stacked. In 2013 the Pentagon formally objected, worried the line would interfere with radar at the White Sands Missile Range; the fix was burying five miles of cable. New Mexico’s utility regulator rejected a permit in 2018. The Tohono O’odham Nation and the San Carlos Apache Tribe sued in 2024 over a stretch of the San Pedro Valley they hold sacred; a court dismissed the case that May. Environmental review, financing, litigation, redesign — each added years.

That is the ordinary shape of a big transmission line in America. The electrons move at the speed of light. The permission moves at the speed of a generation.

Why the wire is the bottleneck, not the wind

A turbine can be ordered and standing within a year or two. A line that crosses two states, a missile range, a wildlife refuge, and tribal land is a different kind of object — it needs the consent of everyone along the route, and any one of them can stall it.

SunZia uses high-voltage direct current — a way of moving large amounts of power over long distances while losing relatively little of it as heat [0]. That technology matters because the best wind and sun are usually far from the cities that need them. Without long lines, clean power stays stranded where it’s generated.

The line is also built to help with the “duck curve” — the daily dip when solar output falls in the evening but demand stays high [0]. Because direct current can shift power flows quickly, it can push more wind into those hours and lean less on gas plants [0]. The project is expected to avoid roughly 9 million metric tons of carbon a year [0].

The thing being decided now, for decades

Demand for electricity is climbing — data centres, factories, electric cars and heating all pull on the same grid [0]. Meeting that demand cleanly depends less on new turbines than on new wires, and wires are the slow part.

That slowness showed up elsewhere this week too. At preparatory talks in Bonn before the COP31 climate summit in November, electrification — running cars, heating and industry on electricity instead of burning fuel — moved to centre stage for the first time [1]. Turkey, co-hosting the summit, proposed a target of 35% of final energy from electricity by 2035 [1]. Roughly 80% of the world’s energy still comes from hydrocarbons [1]. Closing that gap means building a great deal of grid — and the grid is the part that takes eighteen years.

A line like SunZia, once energised, will carry power for half a century. The route it follows, the capacity it was sized for, the corridor it locked through the desert — those were choices made by people in 2006, arriving in 2026, and shaping where the Southwest’s power flows long after they’re gone.

02 · Lesson · why it matters

The decision was made in 2006. You're living in it now.

Long-lived things lock in the choices of whoever made them — and the longer they last, the more the present belongs to people who are no longer in the room.

A switch flipped this week, but the choice was made eighteen years ago

When SunZia came online this week, the news was the wind: 916 turbines, a million homes, nine million tons of carbon avoided a year. Real, and worth knowing.

But notice the date underneath the date. The line was first imagined in 2006. The route through the desert, the missile range it had to dodge, the two states it crossed, the capacity it was sized for — those were settled by people sitting in rooms during a different decade. The switch flipped in 2026. The decision is from 2006.

That gap is the whole lesson.

Some things you choose once and live with for fifty years

Most decisions are cheap to change. You pick a route to work, hit traffic, pick a different one tomorrow. The choice and the consequence sit close together.

A few decisions aren’t like that. A power line, a pipeline, a dam, a highway, a coal plant, a city’s water system — you choose them once, they take decades to build, and then they sit in the landscape for half a century. The choice and the consequence are pulled far apart. By the time you feel the result, the people who decided are gone, the conditions have changed, and the thing is too expensive to unbuild.

This is lock-in. Not a trap someone set on purpose. Just the physics of long-lived things: a commitment made early keeps steering long after the moment that made it.

The same property cuts both ways

Here is what makes lock-in worth understanding rather than just fearing.

The very thing that made SunZia take eighteen years — its permanence — is also what makes it valuable. Nobody fights for two decades over something temporary. The Pentagon objected, a tribe sued, a regulator said no, because everyone understood the line would be there for fifty years. The fight was long because the commitment was long.

So lock-in is not simply bad. A grid built right locks in clean power for half a century. A grid built wrong locks in the opposite. The lesson isn’t “avoid commitment” — you can’t run a country on choices you remake every Tuesday. The lesson is: the slower a thing is to change, the more carefully the choice deserves to be made, because you are deciding for people who haven’t shown up yet.

You are downstream of choices you never made

Now look at your own life through this.

The electricity in your wall tonight runs on lines and plants chosen before you thought about any of it. Where your power comes from, whether your evening bill spikes, how clean or dirty your grid is — much of that was locked in by planners and regulators years or decades ago. You inherited their decision the way they inherited someone else’s.

This isn’t a complaint. It’s the shape of living inside long systems. Roughly 80% of the world’s energy still comes from burning things — not because anyone chose that this year, but because the plants, pipes, and habits were locked in over a century and don’t turn over fast. The push at the climate talks this week to electrify — to run more of life on wires instead of fuel — is really a push to start the next fifty-year commitment now, deliberately, instead of drifting into it.

The room you’re not in is deciding your future

Every long thing being built today is a message to a person who doesn’t exist yet.

The corridor cut through the desert this year, the plant approved this decade, the target a minister proposes for 2035 — these will land on people who had no vote in them, the same way SunZia’s 2006 choices landed on us. You are both: the inheritor of old rooms, and, through the slow machinery of the systems you live in, a small part of the rooms deciding for the next ones.

Seeing that doesn’t hand you a lever. Most of it is far above any single seat. But it changes how you read a switch flipping in the news. Behind every “it’s online now” is a decision made long ago, by people who couldn’t see you — and somewhere a decision is being made now that you won’t feel for twenty years. The whole is longer than the headline, and you are standing inside the middle of it.

03 · Lab · your turn

The Fifty-Year Choice

Commit one power source for forty years, watch the world change around it, and feel how a long-lived choice locks in long after the moment that made it.

04 · Hope · carry this

The people who fought eighteen years for one power line never saw the day it switched on, but it carries clean power now because they didn't give up. We are always building things we won't get to use — and that quiet, ordinary faith in the people who come next is how anything lasting ever gets made.