B-32 (C8-2019-0185.0A - Armadillo Parks; District 2) — original pdf

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SUBDIVISION REVIEW SHEET CASE NO.: C8-2019-0185.0A COMMISSION DATE: June 23, 2020 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). On February 11, 2020, this plat was disapproved for reasons, and the applicant has submitted an update to address those reasons. The plat does not comply with the criteria for approval in LDC 25-4-84(B) and staff recommends disapproval for the reasons listed in the attached comment report. An application that has been disapproved with reasons may be updated to address those reasons until the application expires. If the applicant submits an update to address the reasons for disapproval, that update will be presented to the Land Use Commission within fifteen days of submittal. STAFF RECOMMENDATION: Staff recommends disapproval of the plat for the reasons listed in the comment report dated June 19, 2020, 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 June 19, 2020 1 of 7B-322 of 7B-323 of 7B-324 of 7B-32CITY OF AUSTIN –DEVELOPMENT SERVICES DEPARTMENT SUBDIVISION APPLICATION – MASTER COMMENT REPORT CASE NUMBER: UPDATE: CASE MANAGER: C8-2019-0185.0A U1 Steve Hopkins PHONE #: 512-974-3175 PROJECT NAME: LOCATION: Armadillo Parks - Resubdivision 901 ARMADILLO RD SUBMITTAL DATE: June 8, 2020 FINAL REPORT DATE: June 19, 2020 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 August 15, 2020 (ORDER NO. 20200529-012, issued May 29, 2020). 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. This report b. The revised plat/plan in pdf format c. 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 PARD / Planning & Design: Thomas Rowlinson Drainage Engineering: Kyle Virr Water Quality: Kyle Virr 5 of 7B-32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: Per LDC 25-5-1, Please add the following note: ”No structure shall be occupied until the water quality control and detention facility have been constructed, inspected, and accepted by the City of Austin.” U1: Comment not addressed. Note not found. 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 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. U1: Comment stands. DE3: CLEARED DE4: CLEARED PARD / Planning & Design Review - Thomas Rowlinson - 512-974-9372 PR 1: The parkland dedication and park development fee is required (City Code §25-1-601) and must be paid prior to approval. The application proposes 10 units, so the fee for 10 units must be paid pursuant to City Code §25-1-605 and §25-1-606 (high density rate for density greater than 12 units per acre). Park fee bills will be issued with the next update when the number of units has been confirmed. U1: The park fee bills have been issued in AMANDA. The person named as an “Applicant” may pay online at Austin Build + Connect. The fee can be made in one payment though there are two bills. Email the PARD reviewer at thomas.rowlinson@austintexas.gov to request the bill numbers. When payment has been made, email the receipt to this reviewer to clear this comment. PR 2: To show compliance with City Code §25-1-601, add the following note to the plat: “A fee-in-lieu of parkland dedication and park development has been paid for 10 dwelling units.” U1: Cleared. Comments cleared. Subdivision Review - Steve Hopkins - 512-974-3175 AW Utility Development Services - Bradley Barron - 512-972-0078 AW1. Comments released. Water Quality Review - Kyle Virr - 512-974-2538 6 of 7B-32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. U1: Comment stands WQ3: ECM 1.6.8 states, “On-site control of the two-year storm is achieved when the developed- conditions peak runoff rate leaving the site for a given drainage area is less than or equal to the existing-conditions runoff rate. The flow rates can be considered equal if the developed rate is no more than one-half (0.5) cfs greater than the existing rate or if the developed rate is no more than one-half (0.5) percent greater than the existing rate and there are no existing erosion problems downstream of the site” (LDC 25-7-61). Please provide compliance. U1: Please provide an electronic copy of the model used to address this comment. WQ4: For stacked detention, the velocity of the flows entering the SCM for the developed 100 year peak flow must not exceed two feet per second. ECM 1.6.2 B.2. U1: Comment not addressed. WQ5: 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. U1: Comment not addressed. End of report 7 of 7B-32