The J.W. Sligar Land Surveying Notebooks (1973-2002) consist of notebooks with measurements, boundaries, construction calculations, and mapping for land surveys of Southern Nevada, principally the Las Vegas Valley. Projects concern both public and private entities. The notebooks were created as a part of J.W. Sligar's work with ALCA Engineering and and Surveying, Inc, as well as for his own company, J.W. Sligar Surveying.