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RIV E R SID E D R E V D A O O W Y A H 6 0 . 1 5 4 - V E L E R Y 0 0 1 1 3 2 3 T C E S - X 4 0 . 1 5 4 - V E L E R Y 0 0 1 1 0 1 3 T C E S - X 5 9 . 0 5 4 - V E L E R Y 0 0 1 7 7 9 2 T C E S - X 5 9 . 0 5 4 - V E L E R Y 0 0 1 2 8 8 2 T C E S - X 5 9 . 0 5 4 - V E L E R Y 0 0 1 3 7 7 2 T C E S - X 5 9 . 0 5 4 - V E L E R Y 0 0 1 7 0 7 2 T C E S - X 6 7 . 0 5 4 - V E L E S W R Y 0 0 1 9 2 6 2 T C E S - X EXHIBIT Q 2 9 5 2 - 8 9 2 ) 2 1 5 ( x a F 4 8 2 3 - 8 9 2 ) 2 1 5 ( . l e T 5 2 0 2 t h g i r y p o C © C L L , C M E a z r a G 9 2 6 4 1 - F # E P B T 5 3 7 8 7 s a x e T , n i t s u A 5 2 1 e t i u S l , . d v B o t l a R 8 0 7 7 i FEMA EFFECTIVE 100-YR FLOODPLAIN EAST BOULDIN CREEK CENTERLINE PROPERTY LINE 25-YR FLOODPLAIN BOUNDARY PER CORRECTED EFFECTIVE HEC-RAS MODEL 100-YR FLOODPLAIN BOUNDARY PER CORRECTED EFFECTIVE HEC-RAS MODEL I E V T C E F F E D E T C E R R O C I G N T S X E I ) 4 1 - S A L T A ( X T I I I T B H X E N A L P D O O L F D U P S S E R G N O C . S 0 0 5 , I N T S U A , . E V A S S E R G O C . S 0 0 5 : Y B D E N G S E D I : Y B N W A R D I S E N A P M O C D E T A L E R E H T # # # # # # # # # # # # : . O N T C E J O R P : C Q / A Q SHEET EXH OF 1 M P 7 2 : 3 5 2 , 7 r a M n o t t o k l I I I y b d e i f i d o m g w d . T B H X E N A L P D O O L F ) 4 1 - S A L T A G N T S X E I I ( I E V T C E F F E D E T C E R R O C - I \ I I H X E T B H X E N A L P D O O L F S T B H X E D A C - 0 0 \ l i \ I \ I i v C \ 5 0 0 0 0 - 0 7 8 3 1 1 \ : V 8/19/2219/22/203/07/25 EXHIBIT R CITY OF AUSTIN SUPERIORITY FLOODPLAIN ASSESSMENT 500 South Congress PUD 500 South Congress St, Austin, TX 78704 March 31, 2025 Prepared for: City of Austin Public Works Department Austin, Texas Prepared by: Siglo Group 1306 E Cesar Chavez St Austin, Texas 78702 (512) 699-5986 TABLE OF CONTENTS Zone 3 Site Plan Scoring Field Sheets Site Photos 1 2 6 10 11 22 Project Site Boundary Transect Established Sample Plots Entrenchment & BHR Location 1 Source: ESRI, Siglo Group 33 Figure 1: Map of Established FAFH Transects DATE: October 17, 2024500 South Congress01000 ft10/31/24, 4:25 PM Austin, TX Environmental Criteria Manual 500 S. Congress T1 10/14/24 9:30 am Siglo Group L L L L E L L * L 1 2 1 3 3 2 1 3 16 *Soil Compaction: Accounting for impervious cover (concrete) within test plots Plot 1: 50% Plot 2: 40% Plot 3: 50% about:blank * Parameters calculated from Entire Channel = E * Parameters calculaed from Left Bank Only = L 4/11 2 500 South Congress Superiority Assessment10/31/24, 4:25 PM Austin, TX Environmental Criteria Manual 500 S. Congress T1 10/14/24 9:30 am Siglo Group L * L L 2 1 1 2 1 1 3 1 0 12 L L L L L *Mass Wasting: Due to the steepness of bank slope, without concrete armoring, mass wasting would be a major issue. While some armoring can be necessary on urban creeks, the use of it on the entire length of the transect along with no slope layback means the site is overly dependent on armoring to protect from mass wasting. * Parameters calculated from Entire Channel = E * Parameters calculaed from Left Bank Only = L 3 about:blank 5/11 500 South Congress Superiority Assessment10/31/24, 4:25 PM Austin, TX Environmental Criteria Manual 500 S. Congress T1 10/14/24 Siglo Group 9:30 am 1 2 1 E E E * Parameters calculated from Entire Channel = E * Parameters calculaed from Left Bank Only = L about:blank 5/11 4 500 South Congress Superiority Assessment10/31/24, 4:25 PM Austin, TX Environmental Criteria Manual 1 1 6 E E 500 S. Congress T1 10/14/24 9:30 am Siglo Group 16 12 6 34 * Parameters calculated from Entire Channel = E * Parameters calculaed from Left Bank Only = L 5 about:blank 6/11 500 South Congress Superiority Assessment10/31/24, 4:25 PM Austin, TX Environmental Criteria Manual 500 S. Congress T1 42 32 10/14/24 9:30 am Siglo Group 3 1 2 3 180 110 130 180 125 140 150 160 180 140 148 130 1 66.7 0 2 62.5 0 3 83.4 70.9 0 0 6 about:blank 8/11 500 South Congress Superiority Assessment10/31/24, 4:25 PM Austin, TX Environmental Criteria Manual 500 S. Congress T1 10/14/24 9:30 am Siglo Group 1 1 2 0 0 0 50 2 2 2 1 1.7 3 3 1 multi elderberry 100 0 0 0 7 about:blank 9/11 500 South Congress Superiority Assessment10/31/24, 4:25 PM Austin, TX Environmental Criteria Manual 500 S. Congress T1 10/14/24 9:30 am Siglo Group 1 6 2 5 3 0 44 54.2 40 58.4 3.7 16 83.4 65 8 about:blank 9/11 500 South Congress Superiority Assessment15.25 6 2.5 m *Width of floodplain prone area was only measured from the centerpoint of the creek to the floodplain on the property of interest side and then multiplied by 2. 9 500 South Congress Superiority AssessmentPhoto 1: Plot 3 looking towards exisisting development. Photo 2: Plot 2 looking towards existing development. ZONE 3 - PLOTS 2 AND 3 DATE TAKEN: 10/14/2024 10 500 South Congress Superiority AssessmentPhoto 3: Plot 1 looking towards NW creek. Photo 4: Looking along transect. Plot locations on right. ZONE 3 - PLOT 1 AND TRANSECT DATE TAKEN: 10/14/2024 11 500 South Congress Superiority AssessmentPhoto 5: Creek Embeddedness Photo 6: Lack of Epifaunal Substrate and Available Cover ZONE 3 - PLOT 1 AND TRANSECT DATE TAKEN: 10/14/2024 12 500 South Congress Superiority AssessmentTREE LEGEND: EXISTING KEYSTONE TREE TO REMAIN (Appendix F below 19") EXISTING KEYSTONE TREE TO BE RELOCATED (Appendix F below 19") EXISTING KEYSTONE TREE TO BE REMOVED AND MITIGATED FOR (Appendix F below 19") EXISTING PROTECTED TREE TO REMAIN EXISTING PROTECTED TREE TO BE RELOCATED EXISTING PROTECTED TREE TO BE REMOVED AND MITIGATED FOR EXISTING HERITAGE TREE TO REMAIN EXISTING HERITAGE TREE TO BE RELOCATED EXISTING HERITAGE TREE TO BE REMOVED AND MITIGATED FOR DEAD, DISEASED OR IMMINENT HAZARD EXHIBIT S landscape architects, planners & designers 3232 e cesar chavez st bldg 1, suite 100 austin, tx 78702 [512] 327-1011 project 500 south congress tree mitigation related co. austin, tx project number a23034 issue date 4/26/24 designed: drawn: reviewed: sheet title tree preservation plan sheet L.01 TREE PRESERVATION PLAN 1 0' 15' 30' 60' SCALE: 1"=30' N O R T H TREE LEGEND: PREVIOUS TREE LOCATION RELOCATED HERITAGE TREE (Appendix F 24" or greater) RELOCATED PROTECTED TREE (Appendix F 19" - 23.9") ESTIMATED ROOT BALL AREA landscape architects, planners & designers 3232 e cesar chavez st bldg 1, suite 100 austin, tx 78702 [512] 327-1011 project 500 south congress tree mitigation related co. austin, tx project number a23034 issue date 4/26/24 designed: drawn: reviewed: sheet title tree relocation plan sheet L.02 TREE RELOCATION PLAN 1 0' 15' 30' 60' SCALE: 1"=30' N O R T H landscape architects, planners & designers 3232 e cesar chavez st bldg 1, suite 100 austin, tx 78702 [512] 327-1011 project 500 south congress tree mitigation related co. austin, tx project number a23034 issue date 4/26/24 designed: drawn: reviewed: sheet title tree preservation charts sheet L.03 KEY MAP 0' 500' 1000' 2000' SCALE: 1"=1000' N O R T H SOUTH CONGRESS AVE. : SECTION 2 2 SCALE: 1/8"=1'-0" 1 SOUTH CONGRESS AVE. : SECTION 1 SCALE: 1/8"=1'-0" EXHIBIT T landscape architects, planners & designers 3232 e cesar chavez st bldg 1, suite 100 austin, tx 78702 [512] 327-1011 project 500 S. Congress PUD related co. austin, tx project number a23034 issue date 4/07/25 designed: drawn: reviewed: sheet title proposed cross sections sheet L.05 KEY MAP 0' 500' 1000' 2000' SCALE: 1"=1000' N O R T H RIVERSIDE DR. : SECTION 2 2 SCALE: 1/8"=1'-0" 1 RIVERSIDE DR. : SECTION 1 SCALE: 1/8"=1'-0" landscape architects, planners & designers 3232 e cesar chavez st bldg 1, suite 100 austin, tx 78702 [512] 327-1011 project 500 S. Congress PUD tree mitigation related co. austin, tx project number a23034 issue date 4/07/25 designed: drawn: reviewed: sheet title proposed cross sections sheet L.06 KEY MAP 0' 500' 1000' 2000' SCALE: 1"=1000' N O R T H INTERNAL DRIVEWAY 3 SCALE: 1/8"=1'-0" 2 HAYWOOD AVE : SECTION 2 NOTE: LANE ASSIGNMENT AND PROVISION OF ON-STREET PARKING WILL BE SUBJECT TO TPW SCALE: 1/8"=1'-0" HAYWOOD AVE : SECTION 1 NOTE: LANE ASSIGNMENT AND PROVISION OF ON-STREET PARKING WILL BE SUBJECT TO TPW SCALE: 1/8"=1'-0" 1 landscape architects, planners & designers 3232 e cesar chavez st bldg 1, suite 100 austin, tx 78702 [512] 327-1011 project 500 S. Congress PUD related co. austin, tx project number a23034 issue date 4/07/25 designed: drawn: reviewed: sheet title proposed cross sections sheet L.07 Carbon Impact Statement EXHIBIT U Project: Scoring Guide: 1-4: Business as usual 5-8: Some positive actions 9-12: Demonstrated leadership 1 2 3 4 5 6 7 8 9 10 11 12 Response: Y=1, N=0 Documentation: Y/N Transportation T1: Public Transit Connectivity T2: Bicycle Infrastructure T3: Walkability T4: Utilize TDM Strategies T5: Electric Vehicle Charging T6: Maximize Parking Reductions Water + Energy WE1: Onsite Renewable Energy WE2: Reclaimed Water Land Use LU1: Imagine Austin Activity Center or Corridor LU2: Floor-to-Area Ratio Food F1: Access to Food Materials M1: Adaptive Reuse Total Score: The Carbon Impact Statement calculation is a good indicator of how your individual buildings will perform in the Site Category of your Austin Energy Green Building rating. Notes: Brief description of project, further explanation of score and what it means T1. Is any functional entry of the project within 1/4 mile walking distance of existing or planned bus stop(s) serving at least two bus routes, or within 1/2 mile walking distance of existing or planned bus rapid transit stop(s), or rail station(s)? T2. Is there safe connectivity from the project site to an “all ages and abilities bicycle facility” as listed in the Austin Bicycle Master Plan? T3. Is the property location “very walkable” with a minimum Walk Score of 70 (found at walkscore.com), or will the project include at least five new distinct basic services (such as a bank, restaurant, fitness center, retail store, daycare, or supermarket)? T4. Does the project utilize two or more of the following Transportation Demand Management strategies: unbundling parking costs from cost of housing/office space, providing shower facilities, providing secured and covered bicycle storage, and/or providing 2+ car sharing parking spaces for City-approved car share programs? T5. Will the project include at least one DC Fast Charging electric vehicle charging station? T6. Does the project utilize existing parking reductions in code to provide 20% less than the minimum number of parking spaces required under the current land development code (or 60% less than the code’s base ratios if there is no minimum parking capacity requirement)? WE1. Will the project include on-site renewable energy generation to offset at least 1% of building electricity consumption? WE2. Will the project include one or more of the following reclaimed water systems: large scale cisterns, onsite grey or blackwater treatment, and reuse or utilization of Austin Water Utility's auxiliary water system to eliminate the use of potable water on landscape/irrigation? LU1. Is the proposed project site located within one of the centers or corridors as defined in the Imagine Austin Comprehensive Plan Growth Concept Map? LU2. If located in an Imagine Austin activity center or corridor, will the proposed project use at least 90% of its entitled amount of floor-to-area ratio? F1. Will the project include a full service grocery store onsite, or is one located within 1 mile of the project, or will the project integrate opportunities for agriculture to the scale as defined by Austin Energy Green Building? M1. Will the project reuse or deconstruct existing buildings on the project site? EXHIBIT W