tl;dr: California's Project Nexus is piloting solar panels over Turlock Irrigation District canals, aiming to generate clean electricity while reducing water evaporation, algal growth, and permitting delays associated with building on undeveloped land. Early results show promise, but scaling faces hurdles: canal maintenance access, varying canal designs, urban constraints, and coordination among multiple water/land/power stakeholders. The state Department of Water Resources is awaiting a final report later this year before committing to broader investment.