A solution to our data center woes? Covering California’s canals with solar panels could generate a staggering 13GW of clean energy and save enough water for two million people, so why the opposition?

California’s 4,000 kilometers of canals could be turned into a dual-purpose power and water infrastructure, producing 13 gigawatts of solar electricity each year while conserving 63 billion gallons of water, enough to supply two million households. A University of California study laid out the numbers. The Nexus pilot project on Turlock Irrigation District canals already delivered: 50 to 70 percent less evaporation, 85 percent less algae, and solar panels that ran 2.5 to 5 percent more efficiently because the water kept them cool.

Yet the idea is meeting organized resistance. The heavy steel structures needed to span the canals can eat up 40 percent of project costs, far more than ground-mounted solar on desert land. Critics insist canals exist for water delivery, not industrial platforms, and that maintenance crews will struggle to desilt or repair channels beneath overhead panels. They point to abundant cheap desert acreage where conventional farms can be built without engineering headaches.

That logic ignores the trade-offs staring the state in the face. California has already lost 40 percent of its Colorado River allocation this year. Every drop lost to evaporation is a drop that cannot cool data centers or sustain farms. Desert solar produces power, but it does nothing to preserve water where agricultural and urban demand actually exists. Canal-top arrays generate electricity closer to load, cutting transmission losses that distant desert projects simply shift onto the grid.