The concentration of PM10 in the air in Hayden has been below federal standards for several years. ADEQ is developing a redesignation request so that EPA will reclassify the area as an attainment area.
The Arizona National Scenic Trail is a complete non-motorized path, stretching 800 diverse miles across Arizona from Mexico to Utah. It links deserts, mountains, canyons, forests, communities and people.
This technical memo summarizes the evaluation of the model construction and approach for the groundwater model used to evaluate future groundwater conditions at and surrounding the proposed Resolution Copper panel cave mine. The groundwater model does not consider impacts from the future tailings facility or water supply pumping over 5 miles distant from the site.
Materials that meet the criteria of Freedom of Information Act exemptions are not posted on this website. Culturally sensitive materials not posted here fall under this criteria.
Technical bulletin that helps outline principles that are applicable to dams of all types. These include "mining dams" which are retaining structures at mine sites or metallurgical plant sites that retain solids or liquids that may or may not be contaminated.
The objectives of the surveys conducted in 2013 were to 1) complete the inventory of perennial waters in the Devils Canyon and Mineral Creek drainages and document the presence of fish and aquatic species within stock tanks; 2) survey Mineral Creek to determine persistence of Longfin Dace, document occurrence of Gila Chub, and evaluate the suitability of habitat in Mineral Creek for the reintroduction of Gila Chub and other native species.
This document contains general guidelines for specifying design earthquake loadings (for design or safety evaluation) and performing seismic analyses for the design of new dams (for evaluating the safety of existing dams or modifying existing dams).
This report presents the Draft Environmental Impact Statement (DEIS) design for the Peg Leg Site Alternative 5 – Optimized. The site is located west of the Florence-Kelvin highway approximately 18 miles south of the Superior, Arizona mill site, as shown on attached drawing G-001.
