I-10 Twin Peaks Traffic Interchange, Environmental Assessment

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Affected Environment and Environmental Impacts October 2005 activities. Disclosure statements demonstrating affirmative or unknown responses for such activities would be subject to Phase I Site Assessments activities. The Town of Marana would determine the location of unrecorded wells on potential acquisition properties prior to final roadway design and R/W acquisition. If wells are identified on the parcels to be acquired, the wells would be abandoned in accordance with the requirements of the ADWR. If relocation of asbestos-containing water lines is required, the contractor would handle, transport, and dispose of the material in accordance with approved federal, state, and county asbestos handling procedures. This would include appropriate precautions to ensure that employees are not exposed to airborne asbestos fibers and that fibers are not released into the atmosphere. Any construction project has the potential to discover new and previously undocumented cases of contamination. According to Arizona Department of Transportation’s Standard Specifications for Road and Bridge Construction, Section 107 Legal Relations and Responsibility to Public (2000 Edition) (Stored Specification 107HAZMT, 01/15/93), if previously unidentified or suspect hazardous materials are encountered during construction, work would stop at that location and the Town of Marana Engineer would be contacted to arrange for proper treatment of those materials. Such locations would be investigated and proper action implemented prior to the continuation of work in that location. Conclusion Based upon the information contained within the PISA, additional R/W would be acquired from potentially contaminated properties, contaminated soils or groundwater may be encountered during project construction, and contaminated properties are possible within the project area that could pose a physical danger to construction crews. Because of these findings, a commitment was made to conduct additional investigations of high and medium priority sites prior to construction activities and to investigate any new cases of contamination that may be encountered during construction activities. Cultural Resources To ensure compliance with the National Historic Preservation Act and to prevent the disturbance of historic and/or cultural resources within the study area, a records search and a field survey were conducted to identify these resources. The results of the search and survey are summarized below. The AZSITE Cultural Resources Inventory was reviewed to identify information about prior studies and previously recorded resources in the project vicinity. AZSITE is a geographic information system database that includes records of the Arizona State Museum (ASM), Arizona State University, Museum of Northern Arizona, Bureau of Land Management, and State Historic Preservation Office (SHPO), including properties listed in the National Register of Historic Places Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista 4-66 Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
Affected Environment and Environmental Impacts October 2005 (NRHP). Reports of major prior studies were reviewed also, including a recently completed overview prepared for the TRDN Project, which overlaps most of the records search area. The records search, which encompassed approximately 10.3square-miles, identified information about 73 prior studies within the search area. Prior surveys were extensive and encompassed almost 90 percent of the record search area (9.25 square miles). The intensive pedestrian archaeological survey encompassed approximately 144 acres of privately owned land. Observational transects at intervals of 20 meters or less were walked. The survey area was easily traversed and vegetation was sparse, which facilitated the survey. Approximately 140 acres was field surveyed for archaeological resources. Approximately 107 acres was previously surveyed. Thirteen acres within the channelized bed of the Santa Cruz River were not surveyed and another 5 acres were not surveyed because right-of-entry had not been acquired from the property owners. The 5 acres within the discontiguous Safe Routes to School corridor are within areas that were previously surveyed and data recovery studies had been conducted prior to construction of the modern residential development that now covers the area. This area was not resurveyed. In addition to the pedestrian survey, a historic building survey was completed for all existing properties within the project area. Potential historic-age buildings and structures were identified from County Assessor records and then field verified. All 22 parcels on the southwestern side of I-10 were surveyed for historic buildings and structures. There were no buildings on the northeastern side of I-10. The PISA prepared for this project was reviewed because that study had examined aerial photographs dating between 1960 and 2000, maps dating from the late 1960s to the mid-1970s, and ADOT as-built plans from 1961. Properties constructed prior to 1960 were field inventoried. These inventories collected information about location, property type, historic and present use, construction materials, architectural style, condition, modifications or additions, and other integrity considerations. The information was used to complete Arizona Historic Property Inventory forms. Identification of Cultural Resources Archeological Sites - Previously Recorded The 73 previous surveys identified 49 archaeological and historical resources within the records search area. Thirty-one of these sites reflected the prehistoric occupation of the region, 15 were from the historic era, and three sites had both prehistoric and historic components. The surveys indicated that 14 of the 31 recorded prehistoric sites were habitation sites, 10 were artifact scatters without features, and the other 7 were artifact scatters with no identified features. A high percentage of sites appeared to be villages, which probably reflected the location adjacent to the Santa Cruz River. One site dated to the Archaic era, and the others to the Hohokam period. Four village sites were described as mostly or completely destroyed. Data recovery Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista 4-67 Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
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Bibliography October 2005 CHAPTER 8
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