Farmland near Corcoran in the southern San Joaquin Valley sank 13 inches in just eight months last year. To the north, near El Nido, the land surface dropped about 10 inches.
Along a major canal near Los Banos, the ground has sunk so much that the concrete sides cracked. Nearby, a bridge over another canal had dropped so low it had to be demolished and replaced with a higher structure.
Groundwater over-pumping is causing some parts of the San Joaquin Valley to sink faster than ever, according to a NASA report released Wednesday.