As a part of its statutory responsibilities, the Conservation and Survey Division maintains a core and sample library in Nebraska Hall. The library contains subsurface samples from a variety of test holes drilled across the state. The sample collection includes data from more than 17,000 oil and gas wells and more than 5,000 test holes (as many as any other state in the nation, drilled for geologic and hydrogeologic research). These geologic samples are maintained and available for study in Nebraska Hall.