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 MBR Design Engineer: To Be Determined: 2 Options Option 1: Name: James Hotchkies, Enereau Systems Group Inc. Daytime Phone: (289) 321-0451 Email Address: james.hotchkies@enereau.com Option 2: Name: Chris Porter, Whitney Equipment Company Inc. (WECI) partnered with AWC Water Solutions Ltd Mailing Address: 21222 30th Dr. SE, Ste 110 City/State/ZIP: Bothell, WA 98021 Daytime Phone: (206) 947-7087 Email Address: cporter@weci.com Site location information Site Address: Huntzinger Rd, Vantage WA 98950 Legal Description: A Portion of the East 1/2 of Section 30, Township 17 N, Range 26 E, W.M., Kittitas County, Washington County: Kittitas Vicinity and site maps See attached map. Narrative The Vantage Bay PUD originally was approved for 315-lot subdivision on 75.6 acres of sloping land, of the 315 lots, 310 were approved for single-family residences with 5 additional lots for amenities and infrastructure. However, this preliminary plat design did not respect the existing topography, nor did it provide a variety of product types or amenities that would be expected in a river-front resort community. Kittitas County approved the minor alteration to decrease the acreage to 58.2 and the number of lots to 145. Of these 145 lots, no more than 40 are proposed to be single-family, attached townhomes and the remaining 105 are proposed to vary in width and size. The development is proposing amenities that include a private clubhouse, a community garden and a barn to serve the residents. We are also proposing the addition of a private winery with approximately 16 acres of vineyards, located in the southern portion of the property. Kittitas County code 17.36.040 final development plan requires certification from state and local health authorities that water and sewer systems are available to accommodate the development. As a condition of approval, a sewage disposal system will need to serve the development. This project will use an on-site MBR packaged treatment plant. MBRs share many of the same processes as traditional Activated Sludge Treatment (AST) including: equalization, anoxic, and aerobic processes. However, instead of a settler, there will be a membrane that filters the water before going through the UV disinfection. This process uses much less space than an AST, and can be easily enclosed in a building, which are the main reasons we picked an MBR. An alternative was to install a lift station and force main to pump the effluent across I-90 to the existing Index #6