Parry’s Acres Sewage System Rehabilitation Project

The City of Tonasket is proposing to rehabilitate the sewage system that services approximately 95 residences in Parry’s Acres. The area of potential effect (Project Area) consists of three non-contiguous locations directly west of the Okanogan River. The three parts of the rehabilitation include: 1) The Gravity Sewer Main, 2) The Main Sewage Lift Station, and 3) The Grinder Pump Lift Station. The Gravity Sewer Main Rehabilitation constitutes approximately 700 linear feet along Weber Road. The Main Sewage Lift Station Rehabilitation covers less than 1.0 acre on the east side of Janis-Oroville Westside Road. The Grinder Pump Lift Station Rehabilitation includes less than 1.0 acre located at a mobile home park east of Janis-Oroville Westside Road.

The cultural resource survey of the Parry’s Acres Sewage System Rehabilitation Project is intended to identify previously unrecorded archaeological resources and historic properties prior to the execution of the proposed undertaking. Pre-field research consisted of the review of known archaeological resources within a 1.0-mi (1.6-km) radius of the Project Area as inventoried on the Washington Information System for Architectural and Archaeological Records Data (WISAARD) at the Washington State Department of Archaeology and Historic Preservation (DAHP) in Olympia, Washington. This search revealed five previously recorded archaeological resources and 12 previously conducted cultural resource surveys within 1.0 mile (1.6 km) of the Project Area. None of which are located directly within the Project Area. The DAHP’s predictive model places the Project Area within an area of very high risk for encountering cultural resources (DAHP 2015).

The fieldwork was completed in a manner consistent with Washington State Senate Bill 5282 amending RCW 27.53.030, and included inspection techniques to identify surface archaeological resources. The cultural resource survey and subsurface investigations for the Parry’s Acres Sewage System Project in Tonasket took place at three non-contiguous locations: Gravity Sewer Main, Main Sewer Lift Station, and Grinder Pump Lift Station. The investigation by Plateau resulted in no newly recorded cultural resources. Plateau recommends that the proposed undertaking will result in No Historic Properties Affected, and no further archaeological investigations are recommended prior to or during the execution of this project.

Location: Okanogan County, Washington

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