Turbine Repairs?

I was traveling back home the other day, and came across this sight:

Blades Coming Down

As discussed here a couple of weeks ago, there’s been a lot of wind farm activity in the area over the past several months. Mostly this has been occurring in the form of raising new turbines to replace the ones taken down at Mendota Hills. This is different - the turbine you see here is one that has been up for several years.

I’ve never had the opportunity to see this particular event occur - them taking down an entire blade set. However, it is the case that the blades have to be repaired and/or replaced periodically. At times you will be driving by a turbine and see that it has new blades sitting on the ground next to it, for example. Later they will be gone and the turbine blades look shiny and new. There is also a crew that comes out with a cable and basket system - it looks similar to what you see for skyscraper window-washer crews - and appear to paint or coat the blades while they are still on the turbine.

The turbines themselves also appear to have a cable and winch system inside to pull up parts for internal repairs. I’ve seen them on many occasions with the cable coming down out of the back.

I turned the corner and got a closer shot of it coming down. They were actively bringing it down on the crane, so the blade set is lower in this shot:

Down further still

I suppose the gist of it all - besides the fact that I just find these events pretty cool - is that it shows that these are active, maintained facilities. Crews are out here performing maintenance and keeping them up and running, which seems overall a good sign. And it seems good, in a world where the urban and suburban landscape seems to swallow up more and more farmland, to see activity that makes one feel, at least, like some of this open land will remain open to other, non-residential activity.

New Windmills

Back in the spring of 2016 Leeward Renewable Energy began seeking permission for de-commissioning the Mendota Hills Wind Farm. Mendota Hills has the distinction of being the first of the wind farms in the region.

Growing up out here we always knew it was windy, but that was just a hassle that one dealt with. Our ancestors used wind turbines for a variety of purposes, including pumping water and local electricity generation. This very old picture of the house shows a wind turbine in place as a water pump, standing next to the house atop the original well.

wind pump

People nowadays sometimes complain that the turbines make noise. They are all at least a quarter mile away from any building. Imagine what it would have been like to have this thing spinning right next to the house. But I digress...

That was a thing of the past though, and although one could sometimes see an old wind turbine, or perhaps just its tower, standing at a farmstead, they were only remnants and memories in my childhood.

Between the time I moved away and came back, however, the wind farms sprouted. Mendota Hills was the first, most visible example. It existed alongside route 39 and, despite the name, was a good 12-15 miles north of Mendota, IL. It was visually distinctive because, from the distance of the highway, it gave the impression of what one might classically think of as a wind farm - many turbines sitting in “close” proximity to one another, seeming to turn in sychronicity. Of course, when one got up close to them, it was clear they weren’t nearly as proximate to one another as the distance made it seem. But they were much closer to one another than was the case for the later facilities. The turbines were also smaller and closer to the ground, relatively speaking.

It is that relative age that appears to have precipitated the change, and it was somewhat of a surprise to read that the company was going to be taking down the Mendota Hills turbines. It appears that the turbine technology has advanced sufficiently to make it more cost effective to remove the old giants and replace them with a smaller number of newer, more efficient and, well, giant-er turbines.

What this means for the area is that, for the second time since we’ve moved here, we have new turbines going up. It also means that, for the first time, we’ve been in the broad vicinity of old turbines coming down.

One of the arguments against the wind farms, classically, has been the question of what happens to the structures when the wind company no longer wants them. This spurs on concerns that they will be simply left to rot, huge hulking behemoths on the horizon undergoing the slow, inevitable effect of entropy. Given that this absolutely happens to other unwanted structures in the area - we have old barns, corn cribs, and other derilects aplenty across the countryside, unused, unwanted, but too expensive and time-consuming to take down - one can see the concern. And what is happening to the area around such a structure as it slowly falls apart? Does it one day, finally, unexpectedly topple to the ground? What does the landowner do with it when that happens?

This makes the sequence of events in this example especially interesting. Here, not only are they not being left to rot, but they are being actively removed and replaced. Also interesting and instructive is that this process offers some real-world impression of what would happen if these structures were allowed to topple - because that is exactly how they were taken down.

I regret that I did not have an opportunity to see any of them actually come down - one of the downsides to gainful employment, I suppose - but the evidence was there at each and every site this past summer, many of which could be seen from the road.

Turbine Down If you didn’t know what you were looking at it would be easy to mistake it for a downed aircraft.

As I mentioned above, this is the second round of turbine construction we’ve seen since moving back out to the homestead. It’s an interesting sequence of events, as it has an impact on not just the prairie skyline, but also on the landscape. This is true in multiple ways, as you watch new roadways getting cut into the fields in the area - access drives for the turbines - but also see the modifications made to the public roadways to accommodate the extra-large and unwieldy cargo that the trucks must haul. Each section of the tower, and the turbine blades themselves, come in individually, carried on specialized trailer setups. In many cases, there are special cut-roads that remove the 90° turns that these beasts would be unable to navigate. Signs pop up making drivers aware of overhead powerlines as well, hopefully preventing them from unintentionally clipping them with their outsized cargo.

Of course, anything so very large in its components must also require comparably large equipment to assemble it. And so, as the turbines are assembled, we see the arrival of machines like this crane:

Big Crane

And it’s hard to fully appreciate the size of this thing against the big sky backdrop. But if you look closely at the picture you can suss out the full-size pickup truck by the tread to give a sense of just what a monster that thing is.

Really Big Crane

Opinions on the wind farms vary. THere are absolutely people who hate them, feel they destroy the view, and a few who have some very strange ideas of how they might be harmful. At the Homestead we look at it differently. If the country is going to move away from fossil fuels and nuclear power, there has to be an embrace of alternative technologies. We aren’t helping anyone if we give it lip service but refuse to allow it in our proximity.

And besides - the presence of windfarms around the Homestead virtually guarantees that the land around us will remain open prairie and farmland. Staving off housing developments and otherwise inevitable ultimate suburban sprawl is a benefit from the perspective of this homesteader.

Not that all of that is what goes through my head when I see all of this going on. Rather, during these moments, mostly what is happening is the ascendance of the 12-year old boy inside who loves to watch things get built and knocked down...