ALWI provided hydrogeological and regulatory support for a MDE water appropriation permit application to support the planned dewatering of a surface quarry near Hurlock, in Dorchester County, Maryland. In support of this permit application. We used a simple, time-distance-drawdown model to estimate the areal extent of the cone-of-depression arising from the planned quarry dewatering project.
We first iteratively solved for the pumping rate necessary to maintain the prescribed level of dewatering across the area planned for quarrying. We then added both the storage and recharge components to determine a total amount of water to be pumped from the excavated pit. We considered the areal extent of the modeled cone-of-depression in the context of the construction details and positioning of neighboring wells to conclude that no adverse impacts were likely to arise. MDE concurred and following their review of our submittal, the agency issued Richfield the permit for the quantities requested.