Vantage Bay PUD Final Development Plan Index Master File

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Civil Engineering  Land Surveying  Project Management  Public Works  Land Planning  Landscape Architecture Phone 253.838.6113 800.345-5694 Fax 253.838.7104 Vantage Sewer Treatment facility, owned and operated by Kittitas County Water District #6 (KCWD#6). Ultimately, this option was too expensive, because the facility would have had to been upgraded at the developer’s expense in order to handle the increased flows. A well nearby will supply Vantage Bay with approximately 370,000 gallons of water per day, the remaining water could be allocated towards the development and maintenance of communal outdoor use (e.g. community garden and public landscaping), and a 16- acre vineyard. Underground utilities have not been established at this site yet. Phased development and time frames will be determined with the design. See attached documents for SEPA Checklist. The packaged MBR will be engineered to meet Vantage Bay PUD wastewater demand estimated at 75,000 gallons per day. The MBR will be housed in a barn, occupying less than 0.25 acres, located at the lowest elevation on site, ensuring that the wastewater will gravity flow. The homeowners association will own, operate, and maintain the MBR. Ownership and management requirements will be determined with the design. We have narrowed down the MBR designs to two options: Enereau Systems Group Inc. and WECI partnered with AWC Water Solutions Ltd (see attached documents, includes expected wastewater strength). Both MBRs appear similar in layout, cost, operation, and effluent quality. As part of the design moving forward, one of these two companies will be hired to engineer, construct, transport, and install the packaged MBR on-site and provide operation and maintenance training to Vantage Bay wastewater employees. Physical description of the site A Pedestrian and Subsurface Archaeological Survey was conducted by Northwest Geocultural Consulting (NGC) in 2006. The survey found in general, the ground surface conditions throughout the 58.2 acre project area were variable. Irrigation systems, roads, fencing, and both standing and removed structure locations occupy the majority of the project area. At the southern end of the property, a gravel quarry occupies about four acres of space. East of the site, bordering Wanapum reservoir, a rocky slope separates an upper and lower terrace. At the time of the survey, the ground surface was obscured by a low growth introduced species. Approximately seventy percent of the project area is devoid of native vegetation, except for 20 acres in the southern portion of the site. NGC identified four precontact isolates in their pedestrian survey; however, two of the archaeological resources do not warrant further investigation or conservation and the remaining two are not susceptible to adverse effects from the present project. All road- related construction activities proposed in the project area are to be monitored by a trained archeologist under the supervision of a professional archaeologist. Environmental Assessment Services (EAS) prepared a biological resource review report in 2006, which concluded that no significant natural features were reported within the footprint of the development. There were however, three significant natural features adjacent to the proposed footprint: an active bald eagle nest to the east, a small inlet/backwater slough to the south, and a national wetlands area located east of the slough. The primary and reserve drainfield locations as well as the minimum land area and horizontal set-backs will be determined with the design. Index #6