B-04 (C8-2019-0185.0A - Armadillo Parks; District 2).pdf — original pdf

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SUBDIVISION REVIEW SHEET CASE NO.: C8-2019-0185.0A COMMISSION DATE: April 6, 2021 SUBDIVISION NAME: Armadillo Parks resubdivision ADDRESS: 901 and 906 Armadillo Road APPLICANT: David Cox (Verde Ville, LLC) AGENT: George Gonzalez (Genesis 1 Engineering Co.) ZONING: SF-3-NP (single family residence) NEIGHBORHOOD PLAN: Garrison Creek AREA: 0.703 acre (30,642 sf) LOTS: 5 COUNTY: Travis DISTRICT: 2 WATERSHED: Gilliland Creek JURISDICTION: Full Purpose SIDEWALKS: Sidewalks will be constructed along Armadillo Road, Cooper Lane and Antelope Circle. VARIANCES: none DEPARTMENT COMMENTS: The request is for the approval of Armadillo Parks, a resubdivision of Lots 1 and 2, Big White Cloud Subdivision, comprised of 5 lots on 0.703 acre (30,642 sf). The plat does not comply with the criteria for approval in LDC 25-4-84(B). Staff recommends approval subject to the conditions listed in the attached comment report. An application that has been approved with conditions may be updated to address those conditions until the application expires. STAFF RECOMMENDATION: Staff recommends approval of the plat, subject to the conditions listed in the comment report dated March 31, 2021, and attached as Exhibit C. CASE MANAGER: Steve Hopkins PHONE: 512-974-3175 E-mail: steve.hopkins@austintexas.gov ATTACHMENTS Exhibit A: Vicinity map Exhibit B: Proposed plat Exhibit C: Comment report dated March 31, 2021 1 of 7B-42 of 7B-43 of 7B-44 of 7B-4CITY OF AUSTIN –DEVELOPMENT SERVICES DEPARTMENT SUBDIVISION APPLICATION – MASTER COMMENT REPORT CASE NUMBER: UPDATE: CASE MANAGER: C8-2019-0185.0A U5 Steve Hopkins PHONE #: 512-974-3175 PROJECT NAME: LOCATION: Armadillo Parks - Resubdivision 901 ARMADILLO RD SUBMITTAL DATE: FINAL REPORT DATE: March 22, 2021 March 31, 2021 STAFF REPORT: This report includes all staff comments received to date concerning your most recent subdivision application submittal. The comments may include requirements, recommendations, or information. The requirements in this report must be addressed by an updated submittal. The subdivision application will be approved when all requirements from each review discipline have been addressed. If you have any questions, concerns or if you require additional information about this report, please contact your case manager at the phone number listed above or by using the contact information listed for each reviewer in this report. Any change to the plan/plat shall not cause noncompliance with any applicable code or criteria. In addition, any change to the plat may trigger new comments. UPDATE DEADLINE INFORMATION (LDC 25-4-56; 25-4-82): All comments must be addressed by filing an updated submittal prior to the update deadline of December 31, 2021. Otherwise, the application will expire. If this date falls on a weekend or City of Austin holiday, the next City of Austin workday will be the deadline. Extension of Review Period, Extension of Update Deadline and Tolling of Application Period do not apply to applications for preliminary plan, plat or subdivision construction plans (LDC 25-1-88; 25-1-89; 25-1- 90). UPDATE SUBMITTAL INSTRUCTIONS (LDC 25-1-83): 1. Applicants must make an appointment with Intake Staff (974-1770) in order to submit an update. 2. Your update must include the following items: a. The revised plat in pdf format b. A letter that addresses each comment in the master comment report 3. Updates must be submitted on an approved submittal date, between the hours of 8:30 am and 4:00 pm. Refer to the submittal calendar for a list of approved submittal dates. REVIEWERS: Planner 1: Elsa Garza Drainage Engineering: Kyle Virr Water Quality: Kyle Virr 5 of 7B-4 Water Quality Review - Kyle Virr - 512-974-2538 Release of this application does not constitute a verification of all data, information, and calculations supplied by the applicant. The engineer of record is solely responsible for the completeness, accuracy, and adequacy of his/her submittal, whether or not the application is reviewed for code compliance by city engineers. WQ1: CLEARED WQ2: ECM 1.6.7(H)(2) Soil conditions - When siting a full or partial infiltration rain garden, appropriate soil conditions must be present. The depth to an impermeable layer must be at least 12 inches below the bottom of the rain garden. For full infiltration rain gardens, the underlying native soil must have a design infiltration rate that will draw down the full ponded depth in less than 48 hours. For example, for a 12-inch maximum ponding depth, the design infiltration rate must be at least 0.25 inches per hour. For a 6-inch maximum ponding depth, the design infiltration rate must be least 0.13 inches per hour. For a 3-inch maximum ponding depth, the minimum design infiltration rate is 0.06 inches per hour. The design infiltration rate is based on applying at least a factor of safety of two (2) to the measured steady state saturated infiltration rate (i.e., the design infiltration rate is equal to one-half of the measured infiltration rate). A higher factor of safety may be used at the discretion of the design engineer to take into variability associated with assessment methods, soil texture, soil uniformity, influent sediment loads, and compaction during construction. For full infiltration systems, the infiltration rate of the soil subgrade below the growing medium of the rain garden must be determined using in-situ testing as described in Section 1.6.7.4. If a range of values is measured then the geometric mean should be used. U3: Comment stands pending WQ6. WQ3-WQ5: COMMENTS CLEARED WQ6: ECM 1.6.7(H)(2) Land Use - The use of rain gardens as a water quality control is limited to Commercial, Multi-Family, Civic Uses, Public Right of Way , and single family residential projects. The restrictions on use of rain gardens for single family residential are as follows: 1. Rain Garden must be located in a dedicated common area or within a drainage easement that is accessible by standard maintenance equipment from the right of way. 2. A minimum of four (4) single-family lots must be treated by the rain garden. 3. No rain gardens are to be located in backyards or fenced in yards. 4. The City of Austin will provide functional maintenance per City Code Section 25-8-231. Homeowners may add additional native landscaping and provide care that is more frequent. U3: Comment stands. See Part 2 above. Drainage Engineering Review - Kyle Virr - 512-974-2538 Release of this application does not constitute a verification of all data, information, and calculations supplied by the applicant. The engineer of record is solely responsible for the completeness, accuracy, and adequacy of his/her submittal, whether or not the application is reviewed for code compliance by city engineers. DE1: CLEARED DE2: Fiscal arrangements are required for street, sidewalk, drainage, restoration, erosion controls and boundary street improvements [LDC 25-1-112]: In the City of Austin jurisdiction, fiscal surety is not collected for local streets and drainage. Please contact me to discuss what will need to be 6 of 7B-4included in the fiscal estimate. Remember to include fiscal for sidewalks located next to greenbelts, open spaces, landscape areas, and other common areas. Please provide an engineer’s estimate of fiscal requirements for review and approval. U3: Comment stands. Emailed fiscal policy. PARD / Planning & Design Review - Thomas Rowlinson - 512-974-9372 DE3: CLEARED DE4: CLEARED Comments Cleared. End of Report 7 of 7B-4