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City of Everett,Washington I Reservoir 3 Structural Improvements PDB Project <br /> Progressive Design-Build Contract I Exhibit B.Owner's Project Criteria <br /> Exhibit B <br /> Reservoir 3 Structural Improvements Project <br /> City of Everett <br /> Owner's Project Criteria <br /> 1 General <br /> The Design-Builder shall conform design and construction to the requirements and <br /> performance criteria identified in this Exhibit. During design or construction, the Design- <br /> Builder may propose modifications to the Owner's Project Criteria. Any such <br /> modifications are subject to the approval of the City. <br /> 2 Project Scope: <br /> The Project scope consists of the following: <br /> • Design and construction of Reservoir 3 cover structural improvements/repairs <br /> • Design and construction of a ventilation system for Reservoir 3 <br /> • Design and construction of improvements to the valve vault adjacent to <br /> Reservoir 3 <br /> • Design and construction of seismic improvements to Reservoir 3 (budget <br /> allowing) <br /> The structural repairs for the roof system are intended to address corrosion damage, <br /> concrete spalling, and settlement issues in numerous locations on the interior and <br /> exterior of the reservoir cover and structural supports. In addition, one area of the <br /> reservoir wall and a grade beam have been undermined and require infill or other <br /> support to provide full bearing of the concrete in that location. The installation of new <br /> micropiles to support some structural elements of the reservoir has been considered by <br /> prior evaluations, and the Design-Builder should be prepared to assess the need for <br /> similar geotechnical and structural solutions. <br /> The reservoir was designed with no ventilation. The Project includes design and <br /> construction of a ventilation system to mitigate corrosive atmosphere conditions within <br /> the reservoir resulting from storage of chlorinated drinking water. <br /> The control valve vault improvements involve replacement of an existing platform and <br /> ladder, and relocation of existing operator blocks. <br /> The scope of seismic upgrades has not been defined to date, and will depend on <br /> budget availability after accounting for the other improvements required. Ideally, this <br /> Page 1 of 12 <br />