A series of farming experiments was conducted between 2013 and 2017 in Range Creek Canyon, Utah, to better understand the opportunities and constraints faced by prehistoric farmers in the Southwest. The experiments were designed to collect data on the optimal amount of supplemental water that should be applied to maize fields given the costs in labor and benefits in greater yield. We investigate expected variation in water management strategies using an optimal irrigation model (OIM). The model makes clear that the payoff for farming is best understood as a continuum of relative success and that irrigation is one activity (probably of many) that may improve farming efficiency as well as increase harvest yields. The optimal harvest will always be less than the maximum harvest when there are significant operating costs associated with irrigation. Estimating the costs and benefits of irrigation in a specific area allows for an assessment of whether irrigation is expected, and if so, how much effort should be devoted to water management. A local dendroclimatological study is used to provide the prehistoric context for the Fremont who occupied Range Creek Canyon, and irrigation is expected even in periods of greater precipitation.

This paper presents the results of a research project investigating the types, frequencies, and spatial distribution of small items of refuse on and in floors of a prehistoric structure–the Heartbreak Hotel–excavated in central Utah. Excavation and analytical procedures specifically were designed to recover microrefuse–refuse with a minimum dimension of less than .25 cm. There is strong empirical support for the proposition that microrefuse recovered from such contexts will be found in its area of production, and that patterning in its spatial distribution will, other things being equal, indicate spatial patterning in the performance of the activities that produced the microrefuse. We demonstrate that there is rather dramatic patterning in the types and frequencies of microrefuse between and within rooms of the structure and discuss possible explanations for the character of that patterning. We conclude with a discussion of the present limitations of our understanding of refuse disposal and suggest avenues of ethnoarchaeological inquiry likely to produce better archaeological and behavioral expectations relating to spatial patterning of microrefuse.

The animal body-part utility indices developed by Lewis Binford have been used to interpret faunal assemblages ranging from Plio-Pleistocene sites in East Africa to a late prehistoric bison kill in the High Plains of North America. Little attention, however, has been placed on refining or further developing these scales of economic utility. We examine Binford's derivation of the modified general utility index (MGUI) and demonstrate that it is needlessly complex. A nearly identical index, the food utility index (FUI), is presented. It simply scales variation in the amount of meat, marrow, and bone grease associated with different caribou body parts. We then use the insights provided by this simple scale to explore relations among economic utility, differential body-part representation, and human decision making.