This document and the Geographic Information System file that is now a part of the County library of over 1000 coverages, gives the scientific community access to mapping that better differentiates perennial, ephemeral and intermittent watercourses, and provides more comprehensive coverage of shallow groundwater sources. This data is significant because riparian habitat is one of the most important and least protected of the habitat types in Pima County.

The purpose of this project was to compile information on groundwater withdrawals and surface water diversions near perennial streams, intermittent streams, and shallow groundwater areas previously identified by PAG for the SDCP. The information could be used to prioritize future investigations of potential impacts of these withdrawals and diversions on riparian and aquatic habitats for the SDCP.

Conducted for the Pima County Flood Control District by the Pima Association of Governments in order to determine if stormflows on the Cienega Creek have changed over time when analyzed in terms of frequency, volume, and seasonallity. In a data search that extends back to the 1950s, they were able to determine the daily mean flow, the flows over base, and the annual peak flows of the Cienega Creek.

Provides basic information about the source of surface water in Cienega Creek at the downstream end of the natural preserve, which will contribute to efforts to conceptualize and implement effective land management proposals for the SDCP. Study results indicate that the surface flow or subflow from Agua Verde Creek do not significantly influence the water in the Cienega Creek.

Wilson & Company recently completed the City of Casa Grande Small Area Transportation Study. The SATS notes that “as the City of Casa Grande increases in size and planning area, the roadway network is also growing to meet the additional travel demands significant improvement measures are needed to meet the travel demand generated by forecast population and employment growth”. Given the findings of the SATS, the City of Casa Grande contracted with TischlerBise to calculate an infrastructure improvement plans and updated development fees for transportation.

The City of Casa Grande engaged TischlerBise to update its Infrastructure Improvements Plans and development fees for several categories of necessary public services. TischlerBise previously calculated development fees for the City in 1999, 2003, 2006, and 2008. Municipalities in Arizona may assess development fees to offset infrastructure costs to a municipality associated with providing necessary public services to a development. The development fees must be based on an Infrastructure Improvements Plan. Development fees cannot be used for, among other things: projects not included in the Infrastructure Improvements Plan, projects related to existing development, or costs related to operations and maintenance.

One goal of the SDCP was to obtain a permit from the U.S. Fish and Wildlife Service under Section 10 of the Endangered Species Act to enable incidental take of species protected by the ESA in the course of development in Pima County. This report provides the county with the framework to go forward and further its analysis of the final funding costs for a Section 10 Permit.

Pima County’s Southwest area has been identified by County planners as a potential and strategic growth area. To accommodate population growth, the existing infrastructure must be improved and expanded. The purpose of this Infrastructure Plan is to provide a basis for infrastructure decision-making related to development in the Southwest area. It quantifies the nature, phasing, financial impacts, and funding possibilities for those flood control, parks and recreation, transportation, wastewater infrastructure and other improvements that are necessary to service future saturation growth within the study limits.