20220601-003b: Sky Mountain SP-2021-0079C staff presentation — original pdf

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Pamela Abee-Taulli Environmental Program Coordinator Development Services Department SKY MOUNTAIN 8722 W SH 71 SP-2021-0079C PROJECT LOCATION 2 [PROJECT LOCATION 3 [PROPERTY DATA • Williamson Creek Watershed • Barton Springs Zone Classification • Drinking Water Protection Zone • Full Purpose Jurisdiction • Council District 8 4 [SITE CONSTRAINTS Existing slopes from 5 to 15% grade. SITE CONSTRAINTS Existing slopes from 5 to 15% grade. SITE CONSTRAINTS Existing slopes from 5 to 15% grade. Created by fill placed on site around 1980. 1976 SITE CONSTRAINTS Existing slopes from 5 to 15% grade. Created by fill placed on site around 1980. 1984 SITE CONSTRAINTS Existing slopes from 5 to 15% grade. Created by fill placed on site around 1980. 1997 SITE CONSTRAINTS Existing slopes from 5 to 15% grade. Created by fill placed on site around 1980. Fill was not compacted as it was placed and is infeasible to build on. 2021 VARIANCE REQUEST § 25-8-341 - CUT REQUIREMENTS. (A) Cuts on a tract of land may not exceed four feet of depth. 1. The variance request is to allow cut over 4 feet to16 feet. 11 GRADING EXHIBIT 12 VARIANCE RECOMMENDATION Removal of the fill and development of the site will reduce the potential for future erosion on these steep, artificially constructed slopes. Staff recommends the variance, with the following conditions. 1. All grading over 8 feet will be contained with terracing or engineered walls. 2. Around the perimeter of the limits of construction, and in areas where more than 3’ of vertical rise is proposed, 3:1 slopes will have erosion control matting applied immediately after final grade is achieved. 3. Disturbance in the stormwater irrigation fields will be minimized by restricting the LOC and routing the irrigation lines to preserve existing trees to the greatest extent possible. THANK YOU Questions?