Archaeological Monitoring and Discovery Plan for a Sign Rehabilitation and Replacement Project on Interstate 10 (Mileposts 145.5-156.3) and Several Crossroads in the Cities of Phoenix and Tempe, Maricopa County, Arizona

Summary

The Arizona Department of Transportation (ADOT) intends to conduct a sign rehabilitation and replacement project on Interstate 10 (1-10) from milepost (MP) 145.5-156.3 in the cities of Phoenix and Tempe, Maricopa County, Arizona (Figure 1). In addition to the 1-10 mainline, the project also will include sign installation and replacement on the following crossroads: 3rd Street, 7th Street, 16th Street, Washington Street, Jefferson Street, Sky Harbor Circle, Buckeye Road, 24th Street, University Drive, 40th Street, 48"' Street, and Broadway Road. The project area spans portions of Sections 3, 4, 10, 14, 15, 23 and 24 in Township (T) 1 North (N) Range (R) 3 East (E), as well as Sections 19, 20, 29 and 32 in T1N R4E, Gila and Salt River Base Line and Meridian, as depicted on the 1982 Phoenix, Arizona and 1982 Tempe, Arizona United States Geologic Survey (USGS) 7.5-minute topographic quadrangles (Figures 2 and 3). The 1-10 mainline is located entirely within the existing ADOT-owned right-of-way (ROW) adjacent to privately owned and municipal lands. Within the current project limits, the 1-10 ROW averages 400 ft wide (100 ft on each side of the eastbound and westbound roadway centerlines). The above mentioned crossroads are on lands owned by the cities of Phoenix and Tempe.

Previous archaeological investigations have documented the rich cultural resources that are preserved beneath the modern-day development of downtown Phoenix and Tempe. These cultural resources include, but are not limited to, remnants of prehistoric Hohokam irrigation canals, habitations and burials, as well as historic deposits related to the early Euroamerican settlement of Phoenix and Tempe in the 19th and early 20th centuries (Bostwick 2001:5, 12; Turney 1929:1-3; Howard and Huckleberry 1991a and b). For this reason, ADOT requested that EcoPlan Associates, Inc. (EcoPlan) prepare and implement an archaeological monitoring program for the planned undertaking. This monitoring program is intended as a historic preservation mitigation measure. It is designed to alleviate the potential impacts of the proposed sign rehabilitation and replacement project on cultural resources present in the project limits by recording information that would otherwise be destroyed without documentation. The monitoring program includes the preparation of this monitoring and discovery plan for ADOT review and approval, implementation of the approved plan with on-site monitoring during the planned undertaking, and a subsequent report that documents the results of monitoring.

This archaeological monitoring plan was prepared in compliance with, and to fulfill, the requirements of the Arizona Antiquities Act, and the Arizona State Historic Preservation Act. It details the conditions and procedures for the treatment and documentation of cultural resources that may be affected by the I-10 mainline and crossroad sign rehabilitation project. In consultation with ADOT, it was determined that, due to the limited nature of the project-related ground disturbing activities (described below), an archaeological monitoring program, as opposed to archaeological testing and/or data recovery, is a sufficient historic preservation mitigation measure for this project. Appendix A shows the locations of the individual construction plan sheets which detail the activities that will take place within the project area. Archaeological monitoring will be conducted only in areas where ground disturbing activities will occur within the vicinity of known archaeological sites, including canals, but not near historic roads or within sites that have been determined ineligible. Details pertaining to the locations of individual properties and where they intersect with the planned ground disturbing activities associated with the current project also are provided in Appendix A.

This Resource is Part of the Following Collections

• Salt River Project Digital Library

Keywords

Spatial Coverage

Individual & Institutional Roles

Contact(s): Salt River Project Cultural Resource Manager

Contributor(s): J.Simon Bruder

Repository(s): Salt River Project

Prepared By(s): EcoPlan Associates, Inc.

Submitted To(s): Arizona Department of Transportation Environmental & Enhancement Group

Record Identifiers

Salt River Project Library Call No.(s): E78.M375G46 2004

ADOT Project No.(s): I-010-C-312

TRACS No.(s): 010 MA 145 H6328 01C

EcoPlan Cultural Resource Report No.(s): 00-469:182

Salt River Project Barcode No.(s): 00091109

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