I-10 Twin Peaks Traffic Interchange, Environmental Assessment

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Affected Environment and Environmental Impacts October 2005 studies were conducted at two of those before residential developments were constructed. Another appears to have been destroyed by erosion before it was recorded, and a sand and gravel quarry operation destroyed another. Numerous features were recorded at the seven artifact scatters with features. These included, rock shelters, bedrock mortars, check dams, rock piles, a canal, hearths, and roasting pits. One site dated to the Archaic era, and the others were Hohokam. Two sites were characterized as artifact scatters without features and were destroyed after they were recorded and another could not be found when a subsequent survey tried to relocate the site. Eight of the 15 historic-era sites were habitations or sites with remnants of other types of buildings. Three of these were homesteads. Four of the historic sites were related to transportation. These included the Tucson- Casa Grande Highway (State Route (SR) 84), and its predecessor, the Red Rock Road. Another was the current UPRR, which was constructed in 1880. The fourth is the Juan Bautista de Anza National Historic Trail, which is one of only 19 National Historic Trails designated by Congress. The trail corridor was identified on the basis of written documents, and no physical evidence of the de Anza expedition have been found in the record search area. Of the three sites with both prehistoric and historic components, data recovery was conducted at one site before it was destroyed by a residential development. Another had remnants of a historic house with a scatter of prehistoric artifacts. The third site was a scatter of both prehistoric and historic artifacts. Archeological Sites – Field Survey Twelve of the previously recorded archaeological and historical resources identified by the records search were mapped within the alternatives area, and each of these was re-evaluated during the field survey. The current surveys located three additional cultural sites, one historic-age building, and two historic age wells that were previously unrecorded within the project area. Each of these resources are described below. The ASM site number follows the site name. Tucson-Casa Grande Highway (SR 84) AZ AA:2:118(ASM) Different segments of SR 84 have been recorded and designated with various numbers in the Arizona State Museum survey system. The segment of the highway within the alternatives analysis area was converted to the northwest-bound frontage road of I-10 when I-10 was constructed. The historic highway remains in use as a frontage road and is well maintained. During the field surveys for this project, two concrete box culverts were noted along the highway within the alternatives analysis area. Each has a survey benchmark medallion dated 1930. Stewart Brickyard Site AZ AA:12:51(ASM) The Stewart Brickyard site was recorded in 1955 and was described as a scatter of Hohokam pottery sherds that had been progressively destroyed by construction of the Southern Pacific Railroad, Casa Grande Highway (SR 84), and the Southern Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista 4-68 Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
Affected Environment and Environmental Impacts October 2005 Pacific Pipeline. Subsequently the site was characterized as a large Hohokam village. Even though the site is on the opposite side of the Santa Cruz River, it may have been part of the community centered around Los Morteros. During the field survey conducted for this project, it was noted that a sand and gravel operation that was redeveloped as the Pines Golf Club at Marana had destroyed the site south of the Arizona Block and Brick Company parcel. During the course of recording the Arizona Block and Brick Company building, the crew inspected the parcel. No artifacts or archaeological features were noted, but more deeply buried archaeological deposits could remain. Scatter Of Hohokam Pottery Sherds AZ AA:12:52(ASM) This site was first recorded in 1958 and described as a scatter of Hohokam pottery sherds; however, the site was noted as destroyed by construction of the Southern Pacific Railroad, Casa Grande Highway (State Highway 84), and the Southern Pacific Pipeline in 1958. I-10 was subsequently constructed in this corridor as well. Disturbed Scatter Of Hohokam Pottery Sherds AZ AA:12:146(ASM) This site was discovered in 1981 and subsequent testing and data recovery identified 23 features including pit houses, small pits, roasting pits, rock concentrations, and a secondary cremation. The site was interpreted as a middle Sedentary period habitation locus associated with the community centered on Los Morteros. The site was described as no longer existing prior to construction of the residential development that covers the former site location. Extensive And Dense Scatter Of Hohokam Pottery Sherds And Flaked Stone AZ AA:12:226(ASM) This site was discovered in the 1980s by the North Tucson Basin Survey, and described as an extensive and sometimes dense scatter of Hohokam pottery sherds and flaked stone, along with fire-cracked rock and areas of ash staining. In 2003, archaeological monitoring of geotechnical testing near the site as part of the I-10 widening project discovered only a few artifacts. During the field surveys for this project, it was noted that the scatter extended farther west than originally mapped, and site boundaries were expanded approximately 3 acres to include the entire distribution of surface artifacts, increasing the total site area to approximately 24.2 acres. Large Artifact Scatter And Possible Hohokam Pit House Village AZ AA:12:227(ASM) This site was discovered in the 1980s by the North Tucson Basin Survey and a recent survey inspected the site and reported finding approximately 50 artifacts on the site surface. Test excavations were recommended to determine if buried cultural deposits were present and evaluate the National Register eligibility of the site. During the field surveys for this project, a sample of surface artifacts were counted and a high density of artifacts at the site was suggested. Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista 4-69 Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
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Interstate 10 Traffic Interchange a
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Draft Environmental Assessment Octo
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Bibliography October 2005 CHAPTER 8
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Bibliography October 2005 Tetra Tec
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I-10 Twin Peaks Traffic Interchange, Environmental Assessment

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