The Mexican gray wolf subspecies was listed as endangered in 1976. In 1998 a nonessential experimental population was established in New Mexico and Arizona. Eleven captive-born and reared animals were released into the Blue Range Wolf Recovery Area. In June 2007, the U.S. Fish and Wildlife Service contracted with D.J. Case and Associates to assist in planning and implementing public input for a scoping process to identify issues to consider in developing alternatives preparatory to development of a new Environmental Impact Statement for the Mexican gray wolf introduction program.

This report documents the efforts of the Arizona Department of Transportation to implement the American Association of State Highway and Transportation Officials DARWin‐ME pavement design and rehabilitation guide. As part of this implementation, the research team also prepared a practical stand‐alone user’s guide that provides guidance for obtaining inputs, conducting design, and establishing the recommended pavement design.

A diverse community of abundant, native amphibians is persisting along waterways of urban and urbanizing Tucson. Community and government leaders in Tucson support the concept of urban amphibian conservation in principle. Meanwhile, concurrent, commingled plans for infrastructure improvements and ecological restoration along major urban riparian corridors are being developed under leadership from Pima County, City of Tucson, and U.S. Army Corps of Engineers.

Paradoxically, as this work gets underway, it could impact local amphibian populations – temporarily via direct earth-moving impacts, and permanently via elimination of seasonal waters in which amphibians breed. Pima County wishes to minimize these negative impacts, and to learn how to protect, manage and improve habitat conditions for native amphibians. This report describes means by which—despite complex public health issues—such conservation may be possible with proper planning.

The revision is a separate document to the Arizona Regional Haze State Implementation Plan submitted December 2003. The Revision meets specific commitments outlined in the December 2003 SIP (Enclosures 2 through 7) as well as a correction to the authorizing regional haze statutes. The submittal contains a SIP completeness checklist and seven enclosures.

This document includes an attainment demonstration and formal request to the United States Environmental Agency to redesignate the San Manuel, Arizona area, a nonattainment area for sulfur dioxide (SO2), to attainment for the health-based 24-hour average and annual average SO2 National Ambient Air Quality Standards (NAAQS). It summarizes the progress of the area in attaining the SO2 standard, demonstrates that all Clean Air Act requirements for attainment have been adopted, and includes a maintenance plan to assure continued attainment after redesignation.

The Clean Air Act states that an area designated as nonattainment due to a violation of the NAAQS may be redesignated to attainment if the State submits and EPA approves a plan demonstrating that permanent emission controls that resulted in attainment will remain in place. This plan demonstrates that all CAA requirements for attainment and maintenance have been met and summarizes the progress of the area in attaining the PM10 standard. This document includes a formal request to EPA to redesignate the Rillito, Arizona PM10 nonattainment area to attainment for the health-based 24-hour average PM10 NAAQS.

The Arizona State Implementation Plan describes the programs that the State will rely upon to make reasonable progress toward “preventing any future and … remedying any existing impairment of visibility” in the large parks and wilderness areas in Arizona and those in other states that may be affected by pollution generated in Arizona (Class I areas). The federal regional haze rules require states to develop and submit SIPs for improving visibility through the year 2018 that make reasonable progress toward achieving “natural visibility conditions” by the year 2064. This plan is designed to adopt the basic visibility program that addresses impairment of visibility that can be traced to older major industrial sources and implements recommendations adopted by the Grand Canyon Visibility Transport Commission in its 1996 report to EPA.