Class III (Intensive) Cultural Resource Survey of 458 Acres of Federal and Private Land for Proposed Construction and Operations of a Sediment Removal Pond and Storage Area Below Ashurst-Hayden Diversion Dam, Florence, Pinal County, Arizona: Report

As authorized under the Arizona Water Settlements Act of 2004, the San Carlos and Irrigation Drainage District (SCIDD) is undertaking a 10-year rehabilitation project of its irrigation system. SCIDD is the non-Indian irrigation component of the San Carlos Irrigation Project (SCIP), which provides irrigation water to the communities of Florence, Coolidge, and Casa Grande in Pinal County, Arizona. The initial focus of the SCIDD Rehabilitation Project is the rehabilitation of the Ashurst-Hayden Diversion Dam and its associated headworks, which diverts water from the Gila River for SCIP; the armoring of a segment of the south bank of the Gila River, and the construction of a sediment removal pond and storage area downstream of Ashurst-Hayden Diversion Dam. The Bureau of Reclamation, Phoenix Area Office (Reclamation) directed Archaeological Consulting Services, Ltd. (ACS) to conduct a Class III survey of 458 acres of Federal and Private land in anticipation of this undertaking.
During the survey ACS identified 11 archaeological sites, four of which were previously recorded, and 24 isolated occurrences. Nine of the archaeological sites identified date to the Historic period and the remaining two are prehistoric. Two of the archaeological sites were determined eligible for inclusion in the National Register of Historic Places (NRHP) by the Arizona State Historic Preservation Office. Three other sites have been recommended as eligible, and six are recommended as not eligible for inclusion in the NRHP. Based on the results of this survey, it was determined that historic properties would be impacted by the proposed undertaking and it was recommended that Reclamation develop a treatment plan to mitigate adverse effects to properties that could not be avoided.
This is the report.
Photos taken during the survey can be found at tDAR ID: 378153.
The photo log can be found at tDAR ID: 378154.

根据2004年《亚利桑那州水资源安置法案》（Arizona Water Settlements Act of 2004）的授权，圣卡洛斯灌溉排水区（San Carlos and Irrigation Drainage District, SCIDD）正在实施一项为期10年的灌溉系统修复工程。SCIDD是圣卡洛斯灌溉项目（San Carlos Irrigation Project, SCIP）的非印第安灌溉组成部分，该项目为亚利桑那州皮纳尔县的弗洛伦斯、库尔奇奇和卡萨格兰德社区提供灌溉用水。SCIDD修复工程的初期重点为修复阿什斯特-海登分水坝（Ashurst-Hayden Diversion Dam）及其配套首部枢纽，该枢纽从希拉河（Gila River）引水供给SCIP；加固希拉河南岸一段堤岸，并在阿什斯特-海登分水坝下游修建泥沙清除池与储物区。美国垦务局菲尼克斯地区办事处（Bureau of Reclamation, Phoenix Area Office，简称Reclamation）委托考古咨询服务有限公司（Archaeological Consulting Services, Ltd., ACS）对本次工程涉及的458英亩联邦与私有土地开展三级考古调查（Class III survey）。
调查期间，ACS共识别出11处考古遗址（其中4处已先前登记）与24处孤立遗存。已识别的考古遗址中，9处为历史时期遗存，剩余2处为史前时期遗存。亚利桑那州历史保护办公室（Arizona State Historic Preservation Office）认定其中2处遗址符合《国家历史遗迹名录》（National Register of Historic Places, NRHP）的收录标准；另有3处遗址被推荐符合收录标准，6处遗址被建议不符合收录标准。基于本次调查结果，评估认为拟建工程将对历史遗迹造成影响，因此建议美国垦务局菲尼克斯地区办事处制定处理方案，以缓解无法规避的遗迹所受的不利影响。本文件即为该考古调查报告。
调查期间拍摄的照片可在tDAR ID: 378153查阅。照片日志可在tDAR ID: 378154查阅。