The City has recently posted several items to the City’s Stewart Street Reservoir Replacement Project web page under “Quick Links”. What follows is a brief explanation of the items that have been posted:
1. Geotechnical Investigation Report, May 2009, by SHN Engineers and Geologists, Inc.
This report summarizes the geological and geotechnical conclusions resulting from laboratory testing and site investigation by the City’s project design consultant, SHN Engineers and Geologists, Inc. This report provides recommendations for foundation design parameters, grading and cutslope support systems specific to the project site. This report does NOT address general geo hazards in and around the project site, which geo hazards will be addressed in a separate scope of work in conjunction with the CEQA environmental evaluation process.
2. PRELIMINARY Proposed Tank Elevations by SHN
This PRELIMINARY drawing shows the relative locations, in two different elevation views (a cross-section through the site), of the existing and proposed improvements (specifically, tanks) at the Stewart Street site. The drawing has been prepared to address neighborhood concerns regarding potential viewshed impacts to the neighborhood. The elevation view is a function of the location of the tank on the site, the anticipated elevation of the bottom of the tank, and the physical dimensions of the tank and roof structure selected to procude the desired storage volume. The location of the tank on the site is a function of the location (both horizontal and vertical) of the competent subgrade support material; the grading and cutslope support systems as recommended in the Geotechnical Investigation Report; the need to preserve vehicular access to the site, both during construction and during the operational life of the facility; and the desire to minimize excavation and grading on the site, in order to minimize both potential site (and neighborhood) impacts and project costs.
3. PRELIMINARY Site Plan and Access Road Profile by SHN
This PRELIMINARY drawing shows the anticipated location of major components of the project in plan view (from above), and their vertical relationship to existing ground at the site, as depicted by existing ground contours. The major components shown on the plan include the proposed water storage tank, the proposed water pump station, the anticipated piping required to connect to the existing water system, and the location of the proposed access road to the site. The proposed location for temporary water storage is also shown on the plan, as well as proposed new water distribution system improvements. The proposed new water pipe improvements were the result of the city investigating the size and location of existing facilities and determining that the existing service pipe serving several of the Stewart Street residences is located within the proposed new tank excavation, and is severally undersized for proper service to multiple residences. The city proposes to install several hundred feet of new 6” water main to provide improved water service to these residences, and to allow the construction of a new fire hydrant at the end of the new water main. This will result in significantly improved fire protection to the neighborhood.