Documents

Resolution Copper (RC) has established the Independent Technical Review Board (ITRB) in accord with the Rio Tinto D5 Standard. This action comports with current international best practices for siting and design of large and complex tailings storage facilities.

North America’s climate has changed and some societally relevant changes have been attributed to anthropogenic causes (very high confidence). Recent climate changes and individual extreme events demonstrate both impacts of climate-related stresses and vulnerabilities of exposed systems (very high confidence).

Windblown dust, an environmental problem in many disturbed arid lands, has the potential to affect the physiological performance of desert shrubs. Physiological parameters of gas exchange for three species (Larrea tridentata, Hymenoclea salsola and A triplex canescens) were measured at a Mojave Desert site, at which both undisturbed and heavily dusted individual shrubs occurred.

Dust scraped from a car exhaust and ground to a particle size range of 1-10 μm was applied at measured rates to leaves Viburnum tinus. Its effects on photosynthesis and leaf diffusion resistance were measured over a range of light intensities.

This document describes the environmental effects associated with issuance of a permit by the U.S. Army Corps of Engineers (Corps) under Section 404 of the Clean Water Act that would allow for the proposed construction, operation and closure of a new tailings storage facility in the Ripsey Wash drainage area located about ten miles northwest of the community of Kearny in Pinal County, Arizona.

The American people are concerned about the quality of their visual environment. Because of this concern, it has become appropriate to establish the "visual landscape" as a basic resource, to be "treated as an essential part of and receive equal consideration with the other basic resources of the land" (FSM 2380).

African rue is listed as a noxious weed in both Arizona and New Mexico. This field guide serves as the U.S. Forest Service’s recommendations for management of African rue in forests, woodlands, and rangelands associated with the Service’s Southwestern Region.

Geospatial data.

Often as a result of large-scale military maneuvers in the past, many soils in the Mojave Desert are highly vulnerable to soil compaction, particularly when wet. Previous studies indicate that natural recovery of severely compacted desert soils is extremely slow, and some researchers have suggested that subsurface compaction may not recover.

This dissertation employed a novel interdisciplinary approach to address those research unknowns through investigations of the micromorphological structure, soil-geomorphic relationships, and biogeochemical feedbacks of BSCs in the Mojave Desert.