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09/10/2012 drilled pier and grade beam foundation systems, designed as recommended in the BAGG Geotechnical Report. The project proposes to construct homes on Lots 1-4 on pier and grade beam foundations, even when further than 30 feet from toe of bank,to ensure that construction of the proposed project would not expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving landslides or ground failures. Finding: Implementation of MM GEO—3 would reduce impacts from sudden bank failure to the project to a less than significant level. Facts in Support of Finding: Implementation of MM GEO—3 would reduce impacts to the project from sudden bank failure by supporting the homes on a foundation system capable of withstanding landslides or ground failures, as described in Section 2.3 —Geology, Soils, and Seismicity of the Draft EIR on pages 64-75, which is hereby incorporated by reference. Impact: Impact GEO—4: Creek bank erosion has occurred at the rear of proposed Lot 3, and is expected to continue in the future,thereby causing loss of usable rear yard area and damage to the typical backyard improvements that could be placed within the "no-build"easement area. Mitigation: MM GEO—4: To prevent ongoing erosion from affecting Lot 3,the project developer proposes to install bank erosion protection measures consisting of minimally invasive construction techniques as recommended by the Regional Water Quality Control Board in"A Primer on Stream and River Protection for the Regulator and Program Manager" (Technical Reference Circular W.D. 02-#1). These protection measures shall be installed by the developer prior to sale of Lot 3.Prior to installation,the developer shall enter into a Streambed Alteration Agreement with the CA Department of Fish and Game (if determined necessary by CA DFG). The developer shall implement one of the following measures identified in the Technical Reference to help stabilize creek banks: 1. "The most effective and risk free channel improvement is to re- vegetate stream banks with willows, cottonwoods, dogwood and ninebark." 2. Brush Layering-plant material cut from willow, cottonwoods or other riparian species is layered perpendicular to the stream bank slopes. These layers of vegetation grow quickly, sending a mass of root growth into the banks and slowing the velocities of erosive stream flows on the banks. 3. Brush Matting-cut ends of willows are pushed into the ground where they then root. The stems are wired down onto the stream bank with wood stakes cut from lumber and wire. Also,the space around the posts is filled in with dead plant material held down with wire or heavy twine between the posts. 11 RESO.#15217 MUFF#613