Documents

Laharz is software designed to calculate a proximal hazard zone and automate equations and to run within a Geographic Information System (GIS) over three dimensional topography in order to estimate distal hazard zones.

Stockpiling procedures vary between civil engineering and mining operations. These differences and how they effect soil productivity will be discussed. Soil changes that occur when stockpiling techniques are used will also be discussed as will improvements and challenges in the use of this technique.

This memo is written to provide an explanation of the methodology used to derive the rock mass strength for the Apache Leap Tuff (Tal).

In this action, the Environmental Protection Agency (EPA) promulgates revisions to the Guideline on Air Quality Models (‘‘Guideline’’). The Guideline provides EPA’s preferred models and other recommended techniques, as well as guidance for their use in estimating ambient concentrations of air pollutants.

This Environmental Assessment discloses the direct, indirect, and cumulative environmental impacts that would result from the proposed action and alternatives.

The management direction in this plan is designed to protect the values for which the area was designated, and to guide limited uses compatible with the area’s primary purpose.

Screenshot of StreamStats webpage

The purpose of this memo is to present results of water balance analysis for each of the five tailings storage alternatives (Alternatives 2 through 6).

Perched water zones have been identified in the fractured, welded tuff in the semiarid to arid environments of Yucca Mountain, Nevada and near Superior, Arizona.

At six volumes, the January 2021 Rescinded final Environmental Impact Statement (FEIS) describes the potential environmental effects from two proposed actions: a general plan of operations for development of a large-scale underground copper mine by Resolution Copper Mining, LLC.A related, and a legislatively-mandated land exchange.