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The study area is situated along the southern edge of the Superstition Mountains approximately 40 miles east of the greater Phoenix metropolitan area (Figure 1). Geology is dominated by mid-Tertiary volcanic rocks of the Superior volcanic field (Ransome, 1903), and these rocks depostionally overlie a crystalline basement of early Proterozoic Pinal Schist intruded by middle Proterozoic granitoids. In some areas a relatively thin sequence of the Middle Proterozoic Apache Group occurs along the contact between these two rock types.

Rate and distribution of seismic activity are important indicators of the overall state of tectonic stress within a region. In regions characterized by low levels of seismicity, active fault surfaces are rarely visible at the surface, and the analysis of small-magnitude earthquakes at depth may be the most effective way to identify seismic hazard and risk from ambient tectonic activity.

A computer code (RASCAL) has been developed to provide realistic predictions of ground motion parameters for applications to earthquake engineering risk assessment.

The contemporary seismicity of the Colorado Plateau based on seismic monitoring in the past 30 yr can be characterized as being of small to moderate magnitude, and contrary to earlier views, of a low to moderate rate of occurrence with earthquakes widely distributed.

Rock mass characterization is required for many applications in rock engineering practice including excavation design, support design, stope design, amongst others. For these purposes, it is necessary to obtain design input parameters such as deformation moduli and strength parameters for numerical modeling.

The purpose of this study is to quantify climbing resources and to assess potential losses for the Environmental Impact Statement (EIS) and to help identify needs for potential mitigation. Aside from a climbing resources inventory, this memorandum also provides background information related to climbing resources, including a description of areas within the Queen Creek climbing area.

Computed flood flow frequency and volume‐duration‐frequency values for points of interest on Queen Creek and Devil’s Canyon.

The East Clear Creek parcel is a private inholding within the Coconino National Forest, located along East Clear Creek about 38 miles (61 kilometers [km]) southwest of the town of Winslow. The Property encompasses uplands of the Colorado Plateau as well as an approximately 2.3-mile (3.7-km) reach of East Clear Creek in a narrow canyon.

This Tailings Corridor Pipeline Management Plan outlines the design considerations and environmental and spill control measures for pipeline construction and operation.