Hallum, D.R., Sibray, S.S., Howard, L.M., 2018. Hydrogeologic Framework Studies of Portions of the Niobrara River. Conservation and Survey Division, School of Natural Resources, University of Nebraska-Lincoln. pp. 78 Description:The Nebraska Department of Natural Resources (NeDNR) and Upper Niobrara-White Natural Resources District (UNWNRD) expressed interest in improving understanding and their ability to effectively manage water resources in and around a particular reach of the Niobrara River. Aquifer-thickness contours mapped by the Conservation and Survey Division (CSD) indicate that the principle aquifer has zero thickness in this area. Additionally, the statewide geologic bedrock map produced by CSD shows non-aquifer strata of the White River Group along the same reach, and this setting is consistent with the designation of an “aquifer absent area,” as in the present document. Water-management policy development and decisions are complicated by the apparently conflicting presence of registered irrigation wells in the aquifer absent area. This apparent conflict warranted a detailed review of local hydrogeology to improve the available science on which the UNWNRD and NeDNR will base any controls within an integrated water management plan.