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1-5:Aurora Donald Interchange(Exit 278) Interchange Area Management Plan for Marion County Approval ODOT KN19062 Oregon Department of Transportation—Region 2 the Bonneville Power Administration (BPA) Pacific Northwest Transmission System Multiple Property Documentation Form, a document outlining the BPA system's eligibility for listing in the NRHP,the transmission line in the project area meets the criteria for eligibility and is therefore eligible for listing in the NRHP. 2.6.2 Archaeological Resources An archaeological resources review of the study area identified both pre-European and historic-period use within and near the study area. The study area was inhabited by members of the Ahantchuyuk tribe, referred to as the French Prairie Indians or Pudding River Indians, a band within the Kalapuya.They practiced a subsistence round of seasonal fishing, hunting, and management of prairies,thus areas within the former prairie and creeks and wet meadows within the study area could have been occupied by groups during various times of the year. A General Land Office map from 1852 indicates a portion of Ehlen Road (on the east side of present day 1-5)was roughly in place as a wagon road, and much of the land to the northeast, within and near the study area, belonged to a French-Canadian trapper and his Chinook wife, with a building near present day Bents Road. By 1878,the Ehlen Road alignment was established largely where it is today, and members of the Aurora Colony were the primary landowners, with C.N. Ehlen listed as a primary owner. Bents Road is first visible on a United States Geological Survey (USGS) map from 1923, and by 1936 an aerial image shows clusters of farmstead buildings within the study area. Finally, a USGS map from 1956 shows I-5 had been constructed and shows Bents Road displayed with its former name, Fargo (see Appendix J for maps and aerials). A literature review identified one mapped archaeological resource within the study area. However,the location and potential physical remains of the resource had not been field verified, and the site had not been evaluated for listing in the NRHP at the time of the initial inventory. Based on the cultural and environmental setting of the study area,the likelihood of encountering archaeological deposits during project work is high. The potential for scattered archaeological resources throughout the remainder of the study area is moderately high. Figure 2-7 indicates the locations with the highest likelihood of containing concentrations of archaeological resources. Appendix J provides detailed descriptions of the archaeological literature review and historic development in the study area. Since the initial inventory, pedestrian field surveys have been conducted within all areas to be disturbed by the project (with the exception of property owned by Aurora Energy due to a lack of a signed right-of-entry form). The project team completed the archaeological survey of the Aurora Donald Interchange study area in May, September, and November of 2019.The work included pedestrian survey, subsurface sampling through the excavation of shovel probes, and monitoring of geotechnical drilling locations.The project team has examined approximately 45 acres and excavated 118 shovel probes. The survey resulted in the identification of three isolated finds and two archaeological sites, all dating to the historic period. All are situated on privately owned parcels. The project team identified two sites that warrants additional archaeological investigation in support of potential NRHP listing. July 2020 1274-3012-031 2-17