Wyoming Wind Turbine Disposal
A saw bit through a white fiberglass shell twice the length of a bowling lane at the Casper Regional Landfill. Crews cut each 120-foot blade into three sections small enough to strap to a semitrailer.
The trucks rolled out to a trench on the high plains, already lined with identical cut pieces. Hundreds more waited their turn to go in the ground, marking a routine disposal operation for the facility.
Turbine Blades Lower the Actual Recycling Rate
Scrap haulers already know what to do with steel and copper, but the blade is the outlier dragging the real number down.
That 90 percent figure holds up only as a weighted average across a structure containing a steel tower, concrete foundation, copper windings, and a gearbox. The blade makes up roughly a tenth of a turbine’s material, and nobody has a clean answer for it yet.
The Casper Regional Landfill took its first decommissioned blades in the spring.
Hardened Resin Resists Mechanical Processing
That chemistry lets a blade flex in high winds for two decades without cracking, but it resists recycling systems built for everything else.
Processors scaling up composite recovery hit the same ceiling.
Cement co-processing serves as a more common commercial fix, but it incinerates more than 30 percent of the blade mass inside the kiln. That burning process limits how much circularity the operation can claim.
German Lab Experiments Target Balsa Cores
A water jet lance cuts the blade into segments on site before an impact mill breaks the wood free.
Fraunhofer puts several hundred cubic feet of balsa inside a single rotor blade, increasing embedded costs for materials shipped from overseas plantations.
Even so, the work remains at research and pilot scale rather than commercial scale.
Mines Use Retired Blades as Backfill
Wyoming has opened a second route by letting surface coal mines use retired blades and towers as backfill in final pit voids and endwalls. Federal regulators approved the approach, which took effect the following spring after a brief pause to ease pressure on municipal landfills.
These future teardowns aim to avoid cutting through solid fiberglass with a saw.
The trench outside Casper has gone still, with no blades arriving since mid-2021.
Casper Landfill Blade Disposal Fees and Revenue
| Metric | Figure |
|---|---|
| Total blades received in Casper | 1,124 blades |
| Special waste disposal fee | $59 a ton |
| Projected revenue for 1,000 blades | $675,485 |
| Actual collected revenue | Just over $602,000 |
Frequently Asked Questions About Wind Turbine Disposal
Why can wind turbine blades not be melted down like steel?
Blades use a cured thermosetting resin combined with glass fiber and balsa wood. Once this resin hardens during manufacturing, it cannot melt back down the way thermoplastics do.
How much landfill space does a single decommissioned blade require?
City estimates in Casper allowed 30 to 44.8 cubic yards of buried space per 120-foot blade after it was cut into three equal sections.
What happens to the balsa wood recovered from experimental blade processing?
Engineers at the Fraunhofer Institute process the recovered balsa wood into ultra-light insulation mats weighing under 1.3 pounds per cubic foot.
Related reading