20221102-002 & 3: Brodie Oaks Redevelopment PUD (C814-2021-0099) Staff Presentation — original pdf

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ITEM FOR ENVIRONMENTAL COMMISSION AGENDA November 2, 2022 Brodie Oaks Redevelopment PUD C814-2021-0099 Armbrust & Brown (David Armbrust) 4107 S Capital of Texas Highway COMMITTEE MEETING DATE: NAME & NUMBER OF PROJECT: NAME OF APPLICANT OR ORGANIZATION: LOCATION: COUNCIL DISTRICT: 5 ENVIRONMENTAL REVIEW STAFF: Leslie Lilly, Environmental Program Coordinator, (512)535- 8914, Leslie.lilly@austintexas.gov WATERSHED: Barton Creek Watershed/Barton Springs Zone REQUEST: PUD zoning for the property STAFF RECOMMENDATION: STAFF CONDITION: Staff recommended with conditions A. Development associated with C814-2021-0099, located at 4107 S Capital of Texas Highway, shall comply with 25-8, Subchapter A, Article 13 (Save Our Springs Initiative) at the time of permit application except as modified below. a. Section A of 25-8-514 (Pollution Prevention Required) shall be modified to allow a maximum impervious cover for the site of 56% net site area. B. Development associated with C814-2021-0099, located at 4107 S Capital of Texas Highway, shall comply with 25-8 Section A (Water Quality) at the time of permit application except as modified by the PUD ordinance. a. ECM 1.6.7.5 (D) shall be modified to allow captured runoff for beneficial reuse b. 25-8-341 shall be modified to allow cut not to exceed a maximum of fourteen (14) feet. c. 25-8-342 shall be modified to allow fill not to exceed a maximum of fourteen (14) feet. d. 25-8-281 shall be modified to allow encroachment into CEFs as indicated on Exhibit F. C. Additionally, development associated with C814-2021-0099, located at 4107 S Capital of Texas Highway, shall comply with the following requirements a. Reduction in impervious cover from 84% NSA to 56% NSA b. Bring the site into compliance with SOS water quality treatment requirements c. Clustering impervious cover and disturbance 100- 300’ away from Barton Creek d. Restoring 2 acres of the tract to native vegetation e. Provide 100% GSI for water quality controls. f. Provide rainwater harvesting for landscape irrigation of not less than 50% of the landscaped area. g. Provide superior tree protections. h. Comply with Austin Green Building 3-star rating i. Exceed landscaping requirements. j. Provide superior open space and parkland dedication.  COMMITTEE MEETING DATE: NAME & NUMBER OF PROJECT: NAME OF APPLICANT OR ORGANIZATION: LOCATION: ENVIRONMENTAL REVIEW STAFF: WATERSHED: REQUEST: COUNCIL DISTRICT: 5 STAFF RECOMMENDATION: STAFF CONDITION: ITEM FOR ENVIRONMENTAL COMMISSION AGENDA November 2, 2022 Brodie Oaks Redevelopment Site Specific SOS Amendment C814-2021-0099 Armbrust & Brown (David Armbrust) 4107 S Capital of Texas Highway Leslie Lilly, Environmental Program Coordinator, (512)535- 8914, Leslie.lilly@austintexas.gov Barton Creek Watershed/Barton Springs Zone In response to Council Resolution 20221011-076, consider a site- specific amendment to City Code Chapter 25-8, Subchapter A, Article 13 (Save Our Springs Initiative), as minimally required to allow for limits to impervious cover as proposed in application C814-2021-0099 for the Brodie Oaks PUD development. The proposed site-specific amendment should be included as part of the discussion and consideration of the Brodie Oaks PUD development. Staff recommended with conditions A. Development associated with C814-2021-0099, located at 4107 S Capital of Texas Highway, shall comply with 25-8, Subchapter A, Article 13 (Save Our Springs Initiative) at the time of permit application except as modified below. a. Section A of 25-8-514 (Pollution Prevention Required) shall be modified to allow a maximum impervious cover for the site of 56% net site area.  B. Development associated with C814-2021-0099, located at 4107 S Capital of Texas Highway, shall comply with 25-8 Section A (Water Quality) at the time of permit application except as modified by the PUD ordinance. a. ECM 1.6.7.5 (D) shall be modified to allow captured runoff for beneficial reuse b. 25-8-341 shall be modified to allow cut not to exceed a maximum of fourteen (14) feet. c. 25-8-342 shall be modified to allow fill not to exceed a maximum of fourteen (14) feet. d. 25-8-281 shall be modified to allow encroachment into CEFs as indicated on Exhibit F. C. Additionally, development associated with C814-2021-0099, located at 4107 S Capital of Texas Highway, shall comply with the following requirements a. Reduction in impervious cover from 84% NSA to 56% NSA b. Bring the site into compliance with SOS water quality treatment requirements c. Clustering impervious cover and disturbance 100- 300’ away from Barton Creek d. Restoring 2 acres of the tract to native vegetation e. Provide 100% GSI for water quality controls. f. Provide rainwater harvesting for landscape irrigation of not less than 50% of the landscaped area. g. Provide superior tree protections. h. Comply with Austin Green Building 3-star rating i. Exceed landscaping requirements. j. Provide superior open space and parkland dedication. Brodie Oaks Redevelopment PUD 4107 S Capital of Texas Highway C814- 2021- 0099 Leslie Lilly Environmental Program Coordinator Watershed Protection C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Site Background • Proposed new PUD • Part of original 128-acre Barton Creek Plaza Development • Current site - 37.6 acres • Full Purpose Jurisdiction • Activity Center for Redevelopment in Sensitive Environmental Areas in Imagine Austin Vision Plan • Council District 5 C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 3 C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 5 Environmental Features • Barton Springs Watershed • Barton Springs Zone • Edward Aquifer Recharge and Contributing Zone • 84% Impervious Cover • Brodie Oaks Seep/Spring CEFs • Airman’s Cave • Non-compliant with SOS water quality requirements C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Land Use Plan C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 8 Proposed Environmental Code Modifications • • • • 25-8-341 (Cut Requirements) shall be modified to allow cut not to exceed a maximum of fourteen (14) feet as indicated on Exhibit G. 25-8-342 (Fill Requirements) shall be modified to allow fill not to exceed a maximum of fourteen (14) feet as indicated on Exhibit G. 25-8-281 (Critical Environmental Features) shall be modified to allow encroachment into CEFs as indicated on Exhibit F. SOS Ordinance Section A of 25-8-514 (Pollution Prevention Required) shall be modified to allow a maximum impervious cover for the site of 56% net site area. C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 10 E x h i b it G : G r a d i ng P l a n C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 11 Exhibit F: Environment 1. Modify CEF setback for S-1/S-2 Impact to Airman’s Cave CEF 2. setback is limited of up to 80’ with conditions 3. Protective fencing for CEFs C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 12 C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 13 E x h i b it F : Wa t e r Q u a l i t y 1. Brodie PUD with comply with SOS with subgrade ponds for retention/reirrigation system and rainwater harvesting with beneficial reuse Infiltration testing 2. 3. Trenching > 5’ will be inspected by geologist C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 14 Proposed Environmental Superiority • Clustering impervious cover 75-250’ away from Barton Creek Greenbelt • Restoring 2 acres of the tract to native vegetation • Provide 100% Green Stormwater Infrastructure for water quality controls that meet SOS non- degradation pollutant removal. • Provides rainwater harvesting for landscape irrigation of not less than 50% of the landscaped area. • Provides superior tree protections. • Exceed landscaping requirements. • Provide superior open space and parkland dedication • Complies with Austin Green Building 3-star rating C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Additional Environmental Elements • Reducing impervious cover from 84% NAS to 56% NSA (36% decrease) • Rainwater will be used to offset potable water demands for irrigation and cooling tower makeup water (in accordance with 25-8-151 (Innovative Management Practices) • Remove retaining walls from greenbelt edge and restore more natural grade • LEED Neighborhood Development certification • U.S. Green Building Council SITES certification C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Exhibit F: Open Space C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 17 AEGB 3 Star R ating 2022 Requirements • Bicycle parking and supporting facilities • Electric vehicle charging • Energy performance • Dual plumbing to reduce potable demand C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 18 Recommendation S t a f f r e c o m m e n d s a p p r o v a l o f t h e P U D w i t h t h e f o l l o w i n g c o n d i t i o n s • Reduce impervious cover from 84% NSA to 56% NSA • Cluster impervious cover 75-250’ away from Barton Creek • Restore 2 acres of the tract to native vegetation • Provide 100% Green Stormwater Infrastructure for water quality controls that meet SOS non-degradation pollutant removal. • Provide rainwater harvesting for landscape irrigation of not less than 50% of the landscaped area. • Provide superior tree protections. • Exceed landscaping requirements. • Complies with Austin Green Building 3-star rating • Provide superior open space and parkland dedication • LEED Neighborhood Development certification • U.S. Green Building Council SITES certification C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Brodie Oaks Redevelopment SOS Site-Specific Amendment 4107 S Capital of Texas Highway C814- 2021- 0099 Leslie Lilly Environmental Program Coordinator Watershed Protection C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T What is an SOS Site-Specific Amendment • • • • • • • 1 9 9 2 S a v e O u r S p r i n g s o r d i n a n c e a d o p t e d b y c i t i z e n i n i t i a t i v e P e r 2 5 - 8 - 5 1 5 , v a r i a n c e s t o S O S a r e n o t a l l o w e d , p r o h i b i t i n g m o d i f i c a t i o n b y P U D o r d i n a n c e 2 5- 8 - 2 6 R e d e v e l o p m e n t E x c e p t i o n i n t h e B S Z d e e m e d n o t a p p r o p r i a t e O n l y a p p l i e s t o t h e B r o d i e O a k s R e d e v e l o p m e n t P U D p r o j e c t S u p e r m a j o r i t y o f C o u n c i l m u s t a p p r o v e a m e n d m e n t s t o S O S C o u n c i l R e s o l u t i o n 2 0 2 2 1 0 1 1- 0 7 6 o n O c t o b e r 1 3 , 2 0 2 2 : “ T h e C i t y M a n a g e r i s d i r e c t e d t o i n i t i a t e s i t e s p e c i f i c v a r i a n c e s … . . C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Other SOS Site-Specific Amendments 10111 Dobbin Drive Garza Ranch Ordinance No. 20130926-051 C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T SOS Requirements 2 5- 8 - 5 1 4 P o l l u t i o n P r e v e n t i o n R e q u i r e d • I m p e r v i o u s c o v e r i n t h e E d w a r d s A q u i f e r R e c h a r g e Z o n e i s 1 5 % N S A , 2 0 % N S A i n t h e C o n t r i b u t i n g Z o n e • W a t e r Q u a l i t y C o n t r o l s r e q u i r e d f o r r u n o f f f r o m a l l i m p e r v i o u s c o v e r t o m e e t u n d e v e l o p e d c o n d i t i o n s . C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Brodie Oaks SOS Site-Specific Amendment S e c t i o n A o f 2 5 - 8 - 5 1 4 ( P o l l u t i o n P r e v e n t i o n R e q u i r e d ) s h a l l b e m o d i f i e d t o a l l o w a m a x i m u m i m p e r v i o u s c o v e r f o r t h e s i t e o f 5 6 % n e t s i t e a r e a . B r o d i e P U D O r d i n a n c e 2 5- 8 - 3 4 1 s h a l l b e m o d i f i e d t o a l l o w c u t n o t t o e x c e e d a m a x i m u m o f f o u r t e e n ( 1 4 ) f e e t a s i n d i c a t e d o n E x h i b i t G . 2 5- 8 - 3 4 2 s h a l l b e m o d i f i e d t o a l l o w f i l l n o t t o e x c e e d a m a x i m u m o f f o u r t e e n ( 1 4 ) f e e t a s i n d i c a t e d o n E x h i b i t G . 2 5- 8 - 2 8 1 s h a l l b e m o d i f i e d t o a l l o w e n c r o a c h m e n t i n t o C E F s a s i n d i c a t e d o n E x h i b i t F. • • • • C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Land Use Plan C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 26 E x h i b it F : Wa t e r Q u a l i t y 1. Brodie PUD with comply with SOS with subgrade ponds for retention/reirrigation system and rainwater harvesting with beneficial reuse Infiltration testing 2. 3. Trenching > 5’ will be inspected by geologist C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T 27 Recommendation S t a f f r e c o m m e n d s a p p r o v a l o f t h e S O S a m e n d m e n t w i t h t h e f o l l o w i n g c o n d i t i o n s • Reduce impervious cover from 84% NSA to 56% NSA • Cluster impervious cover 75-250’ away from Barton Creek • Restore 2 acres of the tract to native vegetation • Provide 100% Green Stormwater Infrastructure for water quality controls that meet SOS non-degradation pollutant removal. • Provide rainwater harvesting for landscape irrigation of not less than 50% of the landscaped area. • Provide superior tree protections. • Exceed landscaping requirements. • Complies with Austin Green Building 3-star rating • Provide superior open space and parkland dedication • LEED Neighborhood Development certification • U.S. Green Building Council SITES certification C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T Questions? C o n t a c t I n f o r m a t i o n : L e s l i e L i l l y l e s l i e. l i l l y @ a u s t i n t e x a s . g o v C I T Y O F A U S T I N W A T E R S H E D P R O T E C T I O N D E P A R T M E N T