At the proposed Sandy Hollow shooting ranges, 15-30 tons of lead shot would be deposited on the ground each year. The DNR plans to clean up the lead every several years. However, as you can see in these pictures from 2010, the West Branch creek that runs through the proposed shooting range can flood, covering the area of the proposed gun range. This would wash the lead into the stream where it could soak into the groundwater or harm wildlife. Both Orange City and Rural Water have wells downstream from this area. The EPA's Best Management Practices for Lead at Outdoor Shooting Ranges states:
In areas of groundwater discharge such as river flood plains and most flat areas, the groundwater surface is often a few feet below the surface. Remember, the shorter the distance traveled, the greater the risk that the lead will migrate into the environment. Shallow depth to groundwater is indicative of higher risk for lead to reach the water.