20250604-002: 500 South Congress PUD Staff Presentation — original pdf

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500 South Congress Planned Unit Development (PUD) C814-2024-0001 Sean Watson 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 500 South Congress PUD C 8 1 4 - 2 0 2 4 - 0 0 0 1 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 Information • To t a l s i t e a r e a = 6 . 4 8 a c r e s • A u s t i n F u l l P u r p o s e J u r i s d i c t i o n • • • • • • C o u n c i l D i s t r i c t 9 E a s t B o u l d i n C r e e k a n d L a d y B i r d L a k e W a t e r s h e d s, U r b a n W a t e r s h e d S o u t h S h o r e C e n t r a l D i s t r i c t W a t e r f r o n t O v e r l a y P r o p o s e d r e z o n i n g t o a l l o w f o r m i xe d u s e d e v e l o p m e n t / P U D T wo R i m r o c k C E F s s o u t h o f s i t e C r i t i c a l W a t e r Q u a l i t y Z o n e ( C W Q Z ) a n d 1 0 0 - Ye a r F l o o d p l a i 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 Waterfront Overlay Primary and Secondary Setbacks CWQZ 100 Year Floodplain E Bouldin Creek Rimrock CEF 150' Setback 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 Proposed PUD Details • M i x e d D e v e l o p m e n t ~ 9 5 0 r e s i d e n t i a l u n i t s • • • • • 2 2 5 k e y h o t e l 6 0 0 , 0 0 0 s q f t o f o f f i c e s p a c e 1 5 5 , 0 0 0 s q f t o f r e t a i l , r e s t a u r a n t a g r o c e r y s t o r e . 1 0 % m o r e o p e n s p a c e t h a n t h e 1 0 % a n d 2 0 % r e q u i r e m e n t s f o r r e s i d e n t i a l a n d n o n - r e s i d e n t i a l p r o g r a m s 50' Primary Creek Setback 100 Year Floodplain CWQZ • M o s t p a r k i n g w i l l b e a c h i e v e d t h r o u g h b e l o w g r a d e p a r k i n g s t r u c t u r e ( s ) . E Bouldin Creek 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 Proposed Rimrock CEF 50' Setback CWQZ Comparison I m p e r v i o u s c o v e r i n t h e C W Q Z t o b e r e d u c e d f r o m 4 8 . 2 % t o 2 1 % Proposed CWQZ/100 Year Floodplain CWQZ E Bouldin Creek 100 Year Floodplain IC in Proposed CWQZ/FP 100 Year Floodplain E Bouldin Creek CWQZ 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 Trees 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 Environmental Superiority Increased Floodplain Volume: 100-year floodplain volume increase by 25,000 cu ft Increased Floodplain Functionality: Floodplain habitat will be raised to a 'Good' condition based on FAFH • • • Armoring and Impervious Cover Reductions in the Floodplain: Includes removal of 8,000 sq ft of current concrete embankment Increased Creek Habitat: Over 23,000 sq ft of riparian habitat to be restored within floodplain • • Native Pollinator Plants: At least 20 native species • Sustainable SITES Certification: Highest standards in landscape sustainability Superior Plant Diversity and Stability: Riparian planting will exceed ECM density and diversity by 20% • • Human/Nature Connection: Interpretive signage • Natural Areas Management Plan: Includes annual monitoring 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 25-8 Code Modifications S e c t i o n 2 5 - 8 - 6 3 ( C ) ( 1 2 ) p a r k i n g s t r u c t u r e f r o m i m p e r v i o u s c o v e r c a l c u l a t i o n s w h e n t h e p a r k i n g s t r u c t u r e i s c o v e r e d b y s o i l h a v i n g i s c o n s t r u c t e d b e l o w t h e f i n i s h e d g r a d e o f t h e l a n d , a m i n i m u m d e p t h o f t w o f e e t w i t h a n a v e r a g e d e p t h o f n o t l e s s t h a n f o u r f e e t . ( I m p e r v i o u s C o v e r C a l c u l a t i o n s ) i s m o d i f i e d t o e x c l u d e a 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 25-8 Code Modifications S e c t i o n 2 5 - 8 - 2 1 3 ( C ) ( W a t e r Q u a l i t y C o n t r o l S t a n d a r d s ) i s m o d i f i e d t o r e q u i r e a m i n i m u m o f 5 0 % o f t h e w a t e r q u a l i t y v o l u m e r e q u i r e d b y c o d e t o b e p r o v i d e d u s i n g g r e e n s t o r m - w a t e r i n f r a s t r u c t u r e. R a i n w a t e r C i s t e r n F i l t r a t i o n R a i n G a r d e 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 25-8 Code Modifications S e c t i o n 2 5 - 8 - 2 6 1 ( C r i t i c a l W a t e r Q u a l i t y Z o n e D e v e l o p m e n t ) a n d t h e E C M a r e m o d i f i e d t o a l l o w t h e f o l l o w i n g i m p r o v e m e n t ( s ) w i t h i n t h e C r i t i c a l W a t e r Q u a l i t y Z o n e a s s h o w n i n t h e E n v i r o n m e n t a l S u p e r i o r i t y P l a n E x h i b i 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 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 5 0 0 S . C o n g r e s s 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 : • C o m p l y w i t h S e c t i o n 2 5 - 8 - 6 3 ( C ) ( 1 2 ) ( I m p e r v i o u s C o v e r C a l c u l a t i o n s ) ; 2 5 - 8 - 2 6 1 ( C r i t i c a l W a t e r Q u a l i t y Z o n e D e v e l o p m e n t ; 2 5 - 8 - 2 1 3 ( C ) ( W a t e r Q u a l i t y C o n t r o l S t a n d a r d s ) a s m o d i f i e d b y t h e P U D • A u s t i n ’s G r e e n B u i l d i n g P r o g r a m f o r a 2 - s t a r r a t i n g • A E G B L i g h t P o l l u t i o n R e d u c t i o n a n d B i r d C o l l i s i o n D e t e r r e n c e c r i t e r i a • P r o v i d e s u p e r i o r t r e e p r e s e r v a t i o n • R e d u c e s i t e I C b y 5 % , r e m o v e 8 0 0 0 s q f t o f c o n c r e t e f r o m t h e C W Q Z r e d u c i n g I C f r o m 4 8 . 2 % t o 2 0 . 7 % • R e s t o r e 2 3 , 0 0 0 s q f t o f r i p a r i a n a r e a 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 Recommendation • R a i n w a t e r h a r v e s t i n g t o i r r i g a t e 5 0 % + l a n d s c a p e a r e a s • N a t i v e p l a n t s, C e n t r a l Te x a s s e e d s t o c k , 2 0 % i n c r e a s e i n p l a n t i n g d e n s i t y, 2 0 n a t i v e p o l l i n a t o r / b i r d h a b i t a t p l a n t s p e c i e s • P r o v i d e e l e c t r i c v e h i c l e c h a r g i n g s t a t i o n s - 5 % o f p r o v i d e d p a r k i n g • C a r b o n I m p a c t S t a t e m e n t p i l o t p r o j e c t - 1 0 p o i n t s • P u r s u e S u s t a i n a b l e S I T E S c e r t i f i c a t i o n • L E E D “ S i l v e r ” f o r r e s i d e n t i a l b u i l d i n g s a n d “ G o l d ” f o r c o m m e r c i a l b u i l d i n g 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 Boards and Commissions Review Schedule Meeting Parks and Recreation Board: 500 South Congress PUD (Recommended for Approval) Date May 19, 2025 Small Area Planning Joint Committee: 500 South Congress PUD Environmental Commission: 500 South Congress PUD Planning Commission: 500 South Congress PUD June 4, 2025 June 4, 2025 June 10, 2025 South Central Waterfront Advisory Board: 500 South Congress PUD June 16, 2025 City Council: 500 South Congress PUD August 28, 2025 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 : S e a n . Wa t s o n S e a n . Wa t s o n @ 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