RES 16819 - Laserfiche WebLink

TABLE 1. MITIGATION MONITORING AND REPORTING PROGRAM Mitigation Measures Implementation Monitoring Monitoring and Monitoring Verification of Procedures Responsibility Reporting Action Schedule Compliance Mitigation Measure 4.4-3f: Subsurface drainage systems should be installed in all key ways,swales or natural drainage areas,and landslide removal areas in accordance with the recommendations of the geotechnical exploration. Depending on the actual conditions encountered during grading,similar subsurface drainage facilities may be recommended within existing stock ponds,springs,low-lying areas,or at lots where wet conditions are encountered during excavation. In addition, new sources of seepage may be created by a combination of modified topography,future irrigation practices,and potential utility leakage.If discovered,these conditions should be brought to the attention of the Geotechnical Engineer so that remedial actions may be initiated, if necessary. Mitigation Measure 4.4-3g:Structural retaining walls shall be constructed in accordance with the recommendations of the geotechnical exploration and provided with drainage facilities to prevent the buildup of hydrostatic pressures behind the walls. Mitigation Measure 4.4-3h:Where steeper slopes greater than 3:1 are desired,supplemental slope stabilization measures such as geogrid enforcement and/or the use of select fill shall be employed. Drainage benches shall also be provided at a 30-foot minimum intervals,and construction shall follow the structural setbacks of the CBC.Accordingly,structures shall be:(1) set back from the top of the slope by a minimum of one- third of the slope height or a maximum of 40 feet;and(2) set back from the bottom of the slope by a minimum of one-half of the slope height or a maximum of 15 feet. Alternative setbacks may be addressed on a per lot and foundation design basis. Mitigation Measure 4.4-5:All existing non-engineered The project applicant Community Review and approve Prior to issuance Verified by: fill,vegetation, and soft or compressible soils and shall incorporate the Development soil and spoils of grading permit. colluvium in existing canyons,creeks,stock ponds, specifications of this Department; removal plans; drainages,and other areas to be graded shall be measure into project Engineering ensure that all Field inspections removed as necessary for project requirements.The plans. Division recommendations of during depth of removal shall be determined by the geotechnical the project construction. Date: engineer in the field at the time of grading.Evaluation of geotechnical report unsuitable deposits shall be performed during grading by are properly sampling and laboratory analysis. implemented. LUND RANCH II-PUD-25 11 JANUARY 2016