Depletion of groundwater resources in many deep alluvial basin aquifers in the Western USA is causing land subsidence. as it does in many regions worldwide. Land subsidence can severely and adversely impact infrastructure by changing the ground elevation. ground slope (grade) and through the development of ground cracks known as earth fissures that can erode into large gullies. https://www.spidertattooz.com/OPI-GelColor-The-Color-That-Keeps-On-Giving-0-5-oz-HPJ07-p22791/