A concrete company has plans to ramp up its production by drilling hundreds of feet into the San Joaquin River – while the new lease on the project would more than double the company’s current output, the potential move has sparked concerns from the river’s advocates. …  (A)ccording to the San Joaquin River Parkway and Conservation Trust, the project will have significant impacts on the San Joaquin River and surrounding lands, presenting an existential threat to the river. … Additionally, the Trust says the project could negatively impact residential wells, claiming an extensive dig raises concerns of dropping the level of the water table.