Environmental Commission - Nov. 4, 2020

Environmental Commission Regular Meeting of the Environmental Commission - Remote meeting to be held with social distancing modifications. See agenda for details.

Agenda original pdf

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Remote Meeting of the Environmental Commission November 4, 2020 at 6:00 P.M. Environmental Commission to be held November 4, 2020 with Social Distancing Modifications. Public comment will be allowed via telephone; no in-person input will be allowed. All speakers must register in advance (day before the scheduled meeting, November 3, 2020 by noon). All public comment will occur at the beginning of the meeting. To speak remotely at the November 4, 2020 Environmental Commission Meeting, residents must: •Call or email the commission liaison at: Kaela Champlin (512) 974-3443 or Kaela.Champlin@austintexas.gov, no later than noon, (the day before the meeting). The information required is the speaker name, item number(s) they wish to speak on, whether they are for/against/neutral, and a telephone number or email address. •Once a request to speak has been called in or emailed to the board liaison, residents will receive either an email or phone call providing the telephone number to call on the day of the scheduled meeting. •Speakers must call in at least 15 minutes prior to meeting start in order to speak, late callers will not be accepted and will not be able to speak. •Speakers will be placed in a queue until their time to speak. •Handouts or other information may be emailed to Kaela.Champlin@austintexas.gov by noon the day before the scheduled meeting. This information will be provided to Board and Commission members in advance of the meeting. •Residents may watch the meeting here: http://www.austintexas.gov/page/watch-atxn-live 1 Reunión del Environmental Commission Fecha de la reunion (4 de noviembre de 2020 a las 6:00 P.M.) La junta se llevará con modificaciones de distanciamiento social. Se permitirán comentarios públicos por teléfono; no se permitirá ninguna entrada en persona. Todos los oradores deben registrarse con anticipación (3 de noviembre de 2020 antes del mediodía). Todos los comentarios públicos se producirán al comienzo de la reunión. Para hablar de forma remota en la reunión, los residentes deben: • Llame o envíe un correo electrónico al enlace de la junta en (512) 690-6729, Kaela.Champlin@gmail.com a más tardar al mediodía (el día antes de la reunión). La información requerida es el nombre del orador, los números de artículo sobre los que desean hablar, si están a favor / en contra / neutrales, y un número de teléfono o dirección de correo electrónico. • Una vez que se haya llamado o enviado por correo electrónico una solicitud para hablar al enlace de …

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20201104-003a: Albert H. Ullrich Water Treatment Plant, Revision 2, SPC-03-0005C(R2) Staff Presentation original pdf

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Pamela Abee-Taulli Environmental Review Specialist Senior Development Services Department Radmon Rice Environmental Specialist Watershed Protection Department ULLRICH LOW SERVICE PUMP STATION ELECTRICAL FEED RENEWAL 3602 1/2 REDBUD TRL UNIT C SPC-03-0005C(R2) PROJECT LOCATION Site Location Austin ETJ Austin City Limits Edwards Aquifer Recharge Zone Edwards Aquifer Contributing Zone This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. It does not represent an on-the- ground survey and represents only the approximate relative location of property boundaries. This product has been produced by the Watershed Protection Department for the sole purpose of geographic reference. No warranty is made by the City of Austin regarding specific accuracy or completeness. 0510Miles[ PROJECT LOCATION Lake Austin Westlake Hills Lady Bird Lake PROPERTY DATA •Water Supply Rural • Bee Creek, Little Bee Creek, and Lake Austin watersheds •Water Supply Suburban • Lady Bird Lake watershed •Drinking Water Protection Zone •Full Purpose Jurisdiction •Edwards Aquifer Recharge Zone •Wetland & Rimrock Critical Environmental Features •Council District 8 CONSTRAINTS Existing plant from 2003 CONSTRAINTS Steep slopes CONSTRAINTS Multiple Critical Water Quality Zones & Water Quality Transition Zones CWQZ WQTZ CONSTRAINTS Rimrock & Wetland CEFs Rimrock Wetlands BACKGROUND The plan proposes 6 projects to upgrade an existing City of Austin water treatment plant. The purpose is to improve operator and environmental safety by eliminating potential hazards and to upgrade miscellaneous plant processes to ensure the plant can reliably deliver drinking water. 6 PROJECTS In two phases. •Phase 2 •Phase 3 Phase 2 Phase 3 PHASE 2 1. Switchgear enclosure (#7) 2. Duct bank and access drive (#8) 8 7 1. Containment basin 3. Sludge changeover facility PHASE 3 2. Electric building and 4. 6-inch water line related duct banks 7 VARIANCE REQUESTS 1. Vary LDC 25-8-261 to allow development in the Critical Water Quality Zone, and by extension in the Water Quality Transition Zone of a Water Supply Rural watershed in the Edwards Aquifer Recharge Zone South [LDC 25-8-452]. 2. Vary LDC 25-8-281 to allow construction within a rimrock Critical Environmental Feature buffer. 3. Vary LDC 25-8-301 to allow construction of a driveway on a slope with a gradient of more than 15 percent. 4. Vary LDC 25-8-302(A)(1) to allow construction of a building on a slope with a gradient of more than 25 percent 7 VARIANCE REQUESTS 5. Vary LDC 25-8-341 to allow cut to sixteen …

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20201104-003a: Albert H. Ullrich Water Treatment Plant, Revision 2, SPC-03-0005C(R2) variance packet Part 1 of 2 original pdf

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MEMORANDUM TO: Linda Guerrero, Chair, Environmental Commission FROM: Pamela Abee-Taulli, Environmental Review, DSD DATE: October 21, 2020 SUBJECT: Albert H. Ullrich Water Treatment Plant, Revision 2 Variances Dear Chair Guerrero, Ullrich Water Treatment Plant, operated by Austin Water Utility, is critical to providing the City with safe drinking water. The site plan under review is a revision to the original site plan, which was approved in 2003. The plan includes multiple projects and will require seven Environmental variances, largely due to the site’s location in an environmentally sensitive area with numerous environmental constraints. Because of the unusually high number of variances, I have taken the uncommon step of providing a single set of findings for all the variances, rather than one set of findings for each variance. Additionally, I am including this memo to introduce the list of proposed projects. The overall purpose of the plan revision under review is to improve operator and environmental safety by eliminating potential hazards and to upgrade miscellaneous plant processes to ensure the plant can reliably deliver drinking water. The sludge change-over structure replaces existing structures that require confined space entry. Other improvements provide safety washdown areas and a looped, potable water supply to the facility. The spill containment structure will contain fugitive spills that may enter the existing storm drain system from chemical delivery areas and will prevent their discharge into Little Bee Creek. The Low Service Pump Station Electrical Feed Renewal project includes construction of a new electrical building, retaining walls, electrical and mechanical equipment, parking areas, access road, and duct bank routing. Thank you for your consideration. Sincerely, Pamela Abee-Taulli, DSD Radmon Rice, WPD 1 ITEM FOR ENVIRONMENTAL COMMISSION AGENDA COMMISSION MEETING DATE: November 4, 2020 NAME & NUMBER OF PROJECT: Albert H. Ullrich Water Treatment Plant, Revision 2 SPC-03-0005C(R2) NAME OF APPLICANT OR ORGANIZATION: Shari Pape, MWM Design Group LOCATION: 3602 ½ Redbud Trail, Austin, TX, 78746 COUNCIL DISTRICT: District 8 ENVIRONMENTAL REVIEW STAFF: Pamela Abee-Taulli, Environmental Review Specialist Senior, Development Services Department, 512-974-1879, pamela.abee- taulli@austintexas.gov. WATERSHED: REQUEST: Radmon Rice, Environmental Specialist, Watershed Protection Department, 512-974-3429, radmon.rice@austintexas.gov. Bee Creek, Little Bee Creek, and Lake Austin watersheds are classified Water Supply Rural. Lady Bird Lake watershed is classified Water Supply Suburban. Drinking Water Protection Zone 1. LDC 25-8-261 to allow development in the Critical Water Quality Zone, and by extension in the Water Quality Transition Zone of a Water Supply Rural …

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20201104-003a: Albert H. Ullrich Water Treatment Plant, Revision 2, SPC-03-0005C(R2) variance packet Part 2 of 2 original pdf

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Case No.: (City use only) Environmental Resource Inventory For the City of Austin Related to LDC 25-8-121, City Code 30-5-121, ECM 1.3.0 & 1.10.0 The ERI is required for projects that meet one or more of the criteria listed in LDC 25-8-121(A), City Code 30-5-121(A). 1. SITE/PROJECT NAME: 2. COUNTY APPRAISAL DISTRICT PROPERTY ID (#’s): 3. ADDRESS/LOCATION OF PROJECT: 4. WATERSHED: 5. THIS SITE IS WITHIN THE (Check all that apply) Edwards Aquifer Recharge Zone* (See note below) .................. YES No Edwards Aquifer Contributing Zone*.................................. YES No Edwards Aquifer 1500 ft Verification Zone* ....................... YES No Barton Spring Zone* .......................................................... YES No *(as defined by the City of Austin – LDC 25-8-2 or City Code 30-5-2) Note: If the property is over the Edwards Aquifer Recharge zone, the Hydrogeologic Report and karst surveys must be completed and signed by a Professional Geoscientist Licensed in the State of Texas. 6. DOES THIS PROJECT PROPOSE FLOODPLAIN MODIFICATION?.......YES** NO If yes, then check all that apply:  (1) The floodplain modifications proposed are necessary to protect the public health and safety;  (2) The floodplain modifications proposed would provide a significant, demonstrable environmental benefit, as determined by a functional assessment of floodplain health as prescribed by the Environmental Criteria Manual (ECM), or  (3) The floodplain modifications proposed are necessary for development allowed in the critical water quality zone under LDC 25-8-261 or 25-8-262, City Code 30-5-261 or 30-5-262.  (4) The floodplain modifications proposed are outside of the Critical Water Quality Zone in an area determined to be in poor or fair condition by a functional assessment of floodplain health. ** If yes, then a functional assessment must be completed and attached to the ERI (see ECM 1.7 and Appendix X for forms and guidance) unless conditions 1 or 3 above apply. 7. IF THE SITE IS WITHIN AN URBAN OR SUBURBAN WATERSHED, DOES THIS PROJECT PROPOSE A UTILITY LINE PARALLEL TO AND WITHIN THE CRITICAL WATER QUALITY ZONE? ......................................................... YES*** NO ***If yes, then riparian restoration is required by LDC 25-8-261(E) or City Code 30-5-261(E) and a functional assessment must be completed and attached to the ERI (see ECM1.5 and Appendix X for forms and guidance). 8. There is a total of (#’s) Critical Environmental Feature(s)(CEFs) on or within150 feet of the project site. If CEF(s) are present, attach a detailed DESCRIPTION of the CEF(s), color PHOTOGRAPHS, the CEF WORKSHEET and …

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20201104-003b: Concordia University Campus Residence Hall SP-2020-0038C variance packet Part 1 of 2 original pdf

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ITEM FOR ENVIRONMENTAL COMMISSION AGENDA Concordia University Campus Residence Hall, SP-2020-0038C Brandon Hamman, P.E., LEED AP – Kimley-Horn & Associates LOCATION: 11400 Concordia University Drive, 78726 COUNCIL DISTRICT: District 6 ENVIRONMENTAL REVIEW STAFF: Kristy Nguyen, Environmental Review Specialist Senior, Development Services Department, (512) 974-3035, Kristy.Nguyen@austintexas.gov WATERSHED: Bull Creek, Water Supply Suburban, Drinking Water Protection Zone COMMISSION MEETING DATE: NAME & NUMBER OF PROJECT: NAME OF APPLICANT OR ORGANIZATION: REQUEST: STAFF RECOMMENDATION: STAFF CONDITIONS: Variance request is as follows: Request to vary from Lake Austin Watershed Ordinance No. 840301-F, Section 9-10-409(b) – for a cut exceeding four feet Staff recommends this variance, having determined the findings of fact to have been met. 1. Subject to the Void and Water Flow Mitigation Rule (City Environmental Criteria Manual 1.12.0 and City Standards Specification Manual No. 658S) provision that all trenching greater than 5 feet deep must be inspected by a qualified Texas Professional Geoscientist or their representative; 2. Preserve the top 10 inches of topsoil to be used onsite; and 3. Increased tree mitigation and landscaping for areas of fill to stabilize erosion as shown on landscape plan submitted in this variance packet. Staff Findings of Fact and Exhibits Development Services Department Staff Recommendations Concerning Required Findings Concordia University Campus Residence Hall, SP-2020-0038C Project Name: Ordinance Standard: Schlumberger Planned Development Area, Ordinance No. 20070215-042 (as amended) and Lake Austin Watershed Ordinance No. 840301-F, as stated in the Planned Development Area Section 9-10-409(b) – for a cut exceeding four feet Variance Request: Include an explanation with each applicable finding of fact. Land Use Commission variance determinations from Section 9-10-377 of the A. City Code: 1. Are there special circumstances applicable to the property involved where strict application deprives such property owner of privileges or safety enjoyed by other similarly situated property with similarly timed development? In site plan case #SP-2007-0231C, a variance to Lake Austin Yes Ordinance #840301-F, Sections 9-10-409(a) and 9-10-409(b) was granted for a max cut of +/-5.8’ and a max fill of +/- 17.5’ to construct a parking area, baseball field, and fieldhouse. Thereafter, a variance to the same code sections was granted for a max cut of +/-9.25’ and a max fill of +/- 14.85’ to construct a water quality and detention facility, a water quality channel, a softball field, and associated parking in site plan case #SP-2013-0476C. 2. Does the project demonstrate minimum departures from the terms of the …

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20201104-003b: Concordia University Campus Residence Hall, SP-2020-0038C Staff Presentation original pdf

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CONCORDIA CAMPUS RESIDENCE HALL 11400 CONCORDIA UNIVERSITY DRIVE AUSTIN, TX 78726 SP-2020-0038C Kristy Nguyen Environmental Review Specialist Senior Development Services Department 1 Concordia Campus Residence Hall SP-2020-0038C Site Location Austin ETJ Austin City Limits Edwards Aquifer Recharge Zone Edwards Aquifer Contributing Zone This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. It does not represent an on-the- ground survey and represents only the approximate relative location of property boundaries. This product has been produced by the Watershed Protection Department for the sole purpose of geographic reference. No warranty is made by the City of Austin regarding specific accuracy or completeness. 0 5 10 Miles[ 2 PROPERTY DATA • Bull Creek, Water Supply Suburban Classification • Drinking Water Protection Zone • Full Purpose Jurisdiction • Located over Edwards Aquifer Recharge Zone • Council District 6 • Subject to Schlumberger Planned Development Area, Ordinance No. 20070215-042 (as amended) and Lake Austin Watershed Ordinance No. 840301-F, as stated in the Planned Development Area 3 VICINITY EXHIBIT 4 VARIANCE REQUEST Lake Austin Watershed Ordinance No. 840301-F - Section 9-10-409(a) – for a fill exceeding four feet - Section 9-10-409(b) – for a cut exceeding four feet 5 FINDINGS OF FACT LAKE AUSTIN WATERSHED ORDINANCE, SECTION 9-10-377 TO VARY FROM SECTION 9-10- 409(A) – FOR A FILL EXCEEDING FOUR FEET 6 FINDINGS OF FACT LAKE AUSTIN WATERSHED ORDINANCE SECTION 9-10-377 1. Are there special circumstances applicable to the property involved where strict application deprives such property owner of privileges or safety enjoyed by other similarly situated property with similarly timed development? Staff Determination: Yes In site plan case #SP-2007-0231C, a variance to Lake Austin Ordinance #840301-F, Sections 9-10-409(a) and 9-10-409(b) was granted for a max cut of +/-5.8’ and a max fill of +/- 17.5’ to construct a parking area, baseball field, and fieldhouse. Thereafter, a variance to vary from the same code sections was granted for a max cut of +/-9.25’ and a max fill of +/- 14.85’ to construct a water quality and detention facility, a water quality channel, a softball field, and associated parking in site plan case #SP-2013-0476C. 7 FINDINGS OF FACT LAKE AUSTIN WATERSHED ORDINANCE SECTION 9-10-377 2. Does the project demonstrate minimum departures from the terms of the ordinance necessary to avoid such deprivation of privileges enjoyed by such other property and to facilitate a reasonable …

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20201104-003b: Concordia University Campus Residence Hall, SP-2020-0038C variance packet Part 2 of 2 original pdf

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E RIV D R U O B R A H K C O R R O C D O ( 7 K C 0 # ' H 2 R A 0 . 0 O R 0 . B 0 0 W O 0 . 2 5 W U I D R T O H ) D P R T C R I V E R D O O C C # K 2 0 0 H 5 A 0 0 R 2 7 B 5 O O R P R D T C R . EXISTING WALMART PROPERTY EXISTING ALARA APARTMENTS PROPERTY E V I R D Y T I S R E V I N U A I D R O C N O C 00 200' 400' GRAPHIC SCALE 200' PROPERTY LINE LIMITS OF CONSTRUCTION EXISTING SOFTBALL FIELD UNOCCUPIED SPRING D V O R O A L I P R . N T 9 C 0 A 8 G 2 E , P E G A . 6 S 2 5 E M E N T 150' CEF BUFFER 50' CWQZ 150' CEF BUFFER 50' CWQZ 100' WQTZ D R A I N V A O L G . E 9 0 E 8 A 2 S , E M E O P P G R . 6 N T T 2 5 C P D R O E C S # E O 2 R P 0 V R 0 E 7 T T 1 C 0 R 6 A 6 1 3 C T RIM ROCK F L 1 8 " R C R P ( I M S E = ) 9 = 9 5 4 4 8 . . 0 5 ± ± D F R I L M F F L L 1 2 8 = 4 " 9 1 8 " " R 5 R R C P C 3 . C P 2 P ( ± ( ( N S N E E ) W ) = = 9 ) = 9 4 9 4 4 6 6 . . 8 6 8 ± . 8 ± ± D R F I L M 1 = 8 " 9 R 5 C 5 . 0 P ± ( S W ) = 9 5 1 . 1 ± EXISTING BASEBALL FIELD PROPOSED LIMITS OF CONSTRUCTION ET T TT T T T …

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20201104-002a: Country Club Creek West at Roy G. Guerrero Park Update original pdf

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Country Club Creek West at Roy G Guerrero Park Environmental Commission November 4, 2020 Janna Renfro, P.E. Project Sponsor Watershed Protection Department 1 Project Area Roy G. Guerrero Colorado River Metro Park • 363 acres • Constructed drainage channel – Country Club West • Original drainage • channel – Country Club East Improvements constructed in 2010 2 Erosion Damage • 2015 Floods • Severe erosion created a shorter path to the river. • Pedestrian bridge collapsed • May 2015 ‐ December 2017: Erosion damaged ~1500 feet (5 acres) of drainage channel • 100s of trees lost • 2500 dump truck loads of sand and soil (~37,000 cubic yards) 3 Permanent Solution • ~2,000 linear feet of channel stabilization • Three concrete “drop structures” • Natural channel between structures • Bridge over middle structure above 500‐ year flood elevation 4 Temporary Repairs • Project No. 1 • 2017 • Protect Ballfields Interim Project № 1 Permanent Project 5 Temporary Repairs • Project No. 2: • 2018 • Stop headcut from moving upstream Interim Project № 2 Permanent Project 6 2019 – 2020 Update Items • Erosion Progresses • Three New Temporary Repair Projects • Emergency Affidavit • 60% Design Deliverable • Updated Construction Cost Estimate • Schedule 7 Temporary Repairs • Project No. 3: • 2019‐20 • Protect 54” Active Wastewater Line Interim Project № 3 Permanent Project 8 Temporary Repairs • Project No. 4: • 2020 • Protect Park Road Interim Project № 4 Permanent Project 9 Temporary Repairs • Project No. 5: • 2020 • Repair failed temporary headcut stabilization Interim Project № 5 Permanent Project 10 Emergency Affidavit • Summer 2019: ◦ New LiDAR ◦ Progression of erosion ◦ Continuing vulnerability of temporary repairs ◦ Need for additional temporary measures • Fall 2019 ◦ Emergency affidavit ◦ Expedited bid process 11 60% Design & Cost Estimate • 60% Design – Received Spring 2020 • Construction Cost Estimate — $25M ◦ Why? ◦ How? 12 Project Schedule Complete Design Bid Begin Construction Complete Construction 13 14 Trail Connectivity 15 Physical Modeling • Conditions are unique and challenging • High consequence of failure requires more certainty • Improve drop structure design • Determine stable channel configuration 16 Model Findings 9 Revise channel alignment 9 Maximize width 9 Structure modifications Do nothing? • Headcut will continue to move upstream. • High confidence of threats upstream • Increasingly expensive project Wickersham ‐ …

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