08.1 - 2100 Barton Springs Rd - drawings — original pdf

Backup

Barton Springs Road Bridge Preliminary Design - Bridge Architecture Design Report 12 August 2025 Contents This PDF is an interactive document. Click on each number to navigate to the corresponding section. The menu icon on the bottom left returns you to this Table of Contents Introduction Design Concept Cut Sheets About the Bridge Site Context About Austin Project Needs & Goals Overall Bridge Concept Details Lighting Concept Lighting Equipment Surface Material Wall Finish INTRODUCTION 01 Prepared for Ramsey CountyBarton Springs RoadBarton SpringsRoad BridgeZilker ParkColorado RiverBarton CreekBartonSpringsPoolDowntownAustin01 / Introduction Barton Springs Bridge Background Built in 1925, the Barton Springs Road Bridge provides access over Barton Creek along Barton Creek Road at the entrance to Zilker Park. The bridge was widened to its current form in 1946, which includes two traffic lanes in each direction. The bridge also features narrow sidewalks along each side, guard rails and a sidewalk underneath. While the existing bridge is structurally in fair condition, many of its features are functionally obsolete and it requires replacement to ensure safety and longevity. Given that the existing bridge present mobility challenges for vehicles, bikes and pedestrians, this project will provide needed mobility enhancements for all users. Intersection improvements to nearby Barton Springs Road and Azie Morton Drive are necessary as part of this project. In November 2020, Austin voters approved $102 million for major infrastructure projects, with the possibility of allocating a portion of that funding to address the Barton Springs Road Bridge. In December 2023, Austin City Council officially recommended replacing the bridge and advanced the project to the design phase. The City of Austin received a $32 million grant from the U.S. Department of Transportation in November 2024 to help fund construction of the new bridge. 4 AECOMPrepared for The City of AustinLongitudinal Beam - Exposed Rebar Spandrel Column - Spalling 01 / Introduction Condition Assessment • Deck (with integral longitudinal joint), floor beams, and spandrel columns exhibited the most degradation. • All structural components exhibited some degradation. • Rehabilitation for increased service life would need to remove deck, floor beams, and spandrel columns, stripping  structure to  arch ribs as a starting point. • These results remove Rehabilitation Option 1 as  feasible alternative since that option was the “low-impact”, “preserve-structure” option. • Based on the above, we are now focused on Rehabilitation Option 2 and on potential bridge replacement options.  5 Longitudinal Beam - Exposed Rebar Exposed Rebar, Degradee Con AECOMPrepared for The City of AustinProject Needs & Goals Needs Goals Replacement of Structure 100 yrs old, Associated structural degradation  Provide 75 Year Bridge Service Life Safety Barton Springs roadway not aligned Hillside instability at Umlauf Gardens Insufficient Paths Not enough bike or pedestrian paths on bridge Intersection Congestion At Barton Springs / Azie Morton intersection Improve Safety Stabilize Umlauf Gardens Add Multi-modal and Connect with Park Trails Reduce Congestion with addition of right turn 6 AECOMPrepared for The City of AustinStrategic Location 7 Barton Springs RoadBarton SpringsRoad BridgeZilker ParkColorado RiverBarton CreekBartonSpringsPoolDowntownAustinAECOM8 COLORADO RIVERBARTON CREEKBARTON SPRINGS POOLZILKER PARKZILKER BOTANICALGARDENUMLAUFSCULPTUREGARDEN & MUSEUMBARTON SPRINGS RDAZIE MORTON RDWILLIAM BARTON DRLOU NEFF RDBARTON CREEKPEDESTRIAN BRIDGEAECOMPrepared for The City of AustinAbout Austin Culture 9 100 Austin offers over 100 miles of trails for biking, walking, and running. 21 Between 2010 and 2020, Austin’s population grew by 21%, one of the fastest growth rates in the U.S. 400k The Austin City Limits Music Festival attracts over 400,000 attendees annually. $2b Before the pandemic, Austin’s live music scene contributed roughly $2 billion to the local economy 20k Vehicles per day on Barton Springs Road 8k During peak summer days, Barton Springs Pool can attract up to 8,000 visitors AECOMPrepared for The City of AustinDESIGN CONCEPT 02 Prepared for Ramsey CountyBarton Springs RoadBarton SpringsRoad BridgeZilker ParkColorado RiverBarton CreekBartonSpringsPoolDowntownAustinREPLACEMENT BRIDGE CONCEPT Looking NorthEast 11 AECOMPrepared for The City of AustinREPLACEMENT BRIDGE CONCEPT Looking NorthEast (River Level) 12 AECOMPrepared for The City of AustinREPLACEMENT BRIDGE CONCEPT - KEY ELEMENTS Looking NorthEast Concept Description A variety of design concepts are explored for the replacement of the historical Barton Springs bridge. Those options included a spandrel arch design, and under slung arch and vertical peer concepts. The preferred option shown in these renderings utilizes a set of arched piers oriented transverse to the superstructure of the bridge. The arched forms of the piers pay homage to the existing bridge. Their orientation provides a maximum amount of openness and visibility through the bridge when seen by recreational users of the Creek and pedestrians on the pathways below the bridge. The abutment the park side has been pushed back in order to create more open space underneath the bridge so that both the park train and the pedestrian path can be accommodated. The pedestrian handrail on the park side of the bridge utilizes a robust steel design with heavy concrete pilasters at the beginning and end of the railing system. These pilasters will help divert debris during a flood event. 13 AECOMPrepared for The City of AustinPlan View 14 AECOMPrepared for The City of AustinSection View 15 AECOMPrepared for The City of AustinPedestrian View Looking North East 16 AECOMPrepared for The City of AustinPedestrian View Looking North East Concept Description The new bridge provides very wide pedestrian and bicycle pathways on both sides of the structure. This enhanced connectivity will promote use of the bridge by non-motorists and significantly improve safety especially during major festival events such as South by Southwest. The pedestrian experience is further enhanced through the addition of planters and seating with shade devices on either side. The seating areas provide a space for users to rest and take in the view of the surrounding area both upstream and downstream. Further enhancements include lighting for both the roadway and the pedestrian path supported on sustainable wood posts as well as accent lighting mounted in the outside railing pilasters. The surface of the pedestrian pathway will be paved with porcelain pavers organized in a curving and organic configuration. 17 AECOMPrepared for The City of AustinPedestrian View Below Bridge Looking North East 18 AECOMPrepared for The City of AustinRiver View Looking NorthEast 19 AECOMPrepared for The City of AustinPedestrian View Looking North East 20 AECOMPrepared for The City of AustinPRODUCT CUT SHEETS 03 Prepared for Ramsey CountyBarton Springs RoadBarton SpringsRoad BridgeZilker ParkColorado RiverBarton CreekBartonSpringsPoolDowntownAustinLighting Equipment D-Series Size 0 LED Area Luminaire Catalog Number Notes Type Specifications EPA: Length: Width: Height1: Height2: Weight (max): 0.95 ft2 (.09 m2) 26" (66.0 cm) 13" (33.0 cm) 3" (7.62 cm) 7" (17.8 cm) 16 lbs (7.25 kg) L H1 H2 W Hit the Tab key or mouse over the page to see all interactive elements. Introduction The modern styling of the D-Series is striking yet unobtrusive - making a bold, progressive statement even as it blends seamlessly with its environment. The D-Series distills the benefits of the latest in LED technology into a high performance, high efficacy, long-life luminaire. Pilaster Light The outstanding photometric performance results in sites with excellent uniformity, greater Williams S10 Hood Step Light pole spacing and lower power density. It is ideal for replacing up to 400W metal halide with typical energy savings of 70% and expected service life of over 100,000 hours. Ordering Information Pole Mounted Fixture Lithonia Lighting D-Series DSX0 LED Color temperature Series LEDs EXAMPLE: DSX0 LED P6 40K T3M MVOLT SPA NLTAIR2 PIRHN DDBXD Distribution Voltage Mounting DSX0 LED Lightpole Structura Sine Wood Pole P5 P6 P7 1 Forward optics P1 P2 P3 P4 1 Rotated optics P10 2 P11 2 P12 2 P13 1,2 30K 40K 50K 3000 K 4000 K 5000 K Type III short Type I short (Automotive) Type II short T1S T2S T2M Type II medium T3S T3M Type III medium T4M Type IV medium TFTM Forward throw medium Type V very short 3 T5VS Type V short 3 T5S T5M Type V medium 3 T5W Type V wide 3 BLC LCCO RCCO Right corner cutoff 4 Backlight control 4 Left corner cutoff 4 (120V-277V) 5,6 (277V-480V) 7,8,9 MVOLT XVOLT 120 6 208 6 240 6 277 6 347 6 480 6 Square pole mounting Round pole mounting 10 Wall bracket 3 Square pole universal mounting adaptor 11 Round pole universal mounting adaptor 11 Shipped included SPA RPA WBA SPUMBA RPUMBA Shipped separately KMA8 DDBXD U Mast arm mounting bracket adaptor (specify finish) 12 Control options Other options Finish (required) 22 DMG Shipped installed NLTAIR2 PIRHN PER PER5 PER7 nLight AIR generation 2 enabled 13,14 Network, high/low motion/ambient sensor 15 NEMA twist-lock receptacle only (control ordered separate) 16 Five-pin receptacle only (control ordered separate) 16,17 Seven-pin receptacle only (leads exit fixture) (control ordered separate) 16,17 0-10V dimming extend out back of housing for external control (control ordered separate) 18 PIR PIRH PIR1FC3V PIRH1FC3V FAO High/low, motion/ambient sensor, 8-15' mounting height, ambient sensor enabled at 5fc 19,20 High/low, motion/ambient sensor, 15-30' mounting height, ambient sensor enabled at 5fc 19,20 High/low, motion/ambient sensor, 8-15' mounting height, ambient sensor enabled at 1fc 19,20 High/low, motion/ambient sensor, 15-30' mounting height, ambient sensor enabled at 1fc 19,20 Field adjustable output 21 House-side shield 22 Single fuse (120, 277, 347V) 6 Double fuse (208, 240, 480V) 6 Left rotated optics 2 Right rotated optics 2 Diffused drop lens 22 50°C ambient operations 1 Shipped installed HS SF DF L90 R90 DDL HA Shipped separately BS EGS Bird spikes 23 External glare shield Dark bronze Black Natural aluminum DDBXD DBLXD DNAXD DWHXD White DDBTXD DBLBXD DNATXD Textured dark bronze Textured black Textured natural aluminum DWHGXD Textured white One Lithonia Way • Conyers, Georgia 30012 • Phone: 1-800-705-SERV (7378) • www.lithonia.com © 2011-2021 Acuity Brands Lighting, Inc. All rights reserved. DSX0-LED Rev. 01/14/21 Page 1 of 8 COMMERCIAL OUTDOOR Project: Red Bud Bridge HLB Project #: 20156.00 Date: 14 May 2021 Submittal: 30% Type: FX1 APPENDIX: LUMINAIRE CATALOGUE CUTS Note: This document is for information only. Refer to specifications for all catalog numbers, etc. Horton Lees Brogden Lighting Design | 38 E 32nd St 11th Floor New York NY 10016 | P: 212 674 5580 | F: 212 254 2712 | www.HLBlighting.com AECOMPrepared for The City of AustinSurface Material ORI GIN S ™ 3-PIECE SYSTEM E M U L A T E S T H E L O O K A N D T E X T U R E O F N A T U R A L S T O N E W I T H T H E C O N V E N I E N C E O F M O D U L A R S I Z I N G NATURAL COLLEC TION Sidewalk Paver Belgard “Origins” Porcelain Paver 23 AECOMPrepared for The City of AustinWall Finish Wall Formliner Fitzgerald “Florida Ashlar” 24 AECOMPrepared for The City of Austin: I R E M A L C S D I . N W O H S E L A C S E H T F L A H E B L L I W S G N W A R D I E S E H T F O E L A C S E H T , " 7 1 x " 1 1 T A D E T N R P N E H W I . T E E H S H C A E N O N W O H S S A E B L L I W S G N W A R D I E S E H T F O E L A C S E H T , " 4 3 x " 2 2 T A D E T N R P N E H W I I L A T T M B U S % 0 9 $ $ R E S U $ $ $ S L B T N E P $ BARTON SPRINGS ROAD ANN AND ROY BUTLER TRAIL WEST ZILKER EAGLE TRAIL TBM WALL-5 TYPE B VENEER TRV 62 LANDSCAPE SECTION TRV TRV TRV 72 PEDESTRIAN BRIDGE EXISTING TRAIL TO REMAIN ZILKER PARK MATCH EXIST MATCH EXIST RESTRIP AND REGRADE ACCESSIBLE PARKING 459.4 459.4 459.6 R20R15 MATCH EXIST 458.7 459.0 459.0 WALL-4 TYPE B VENEER TRAIL AT 5% SLOPE I C IC LANDING AT 2% 450.5 458.8 458.86 456.75 454.62 452.50 ZILKER EAGLE TRAIL EXISTING TRAIL TO REMAIN TRV 57 TRV 68 TRV 69 T R AIL A T 5 % S L O P E CROSSING AT 2% 448.0 LADY BIRD LAKE ANN AND ROY BUTLER TRAIL WEST ANN AND ROY BUTLER TRAIL EAST LADY BIRD LAKE BARTON SPRINGS ROAD AZIE MORTON ROAD TRV WW CO 4618 WW CO CO TRV 4700 WALL-1 TYPE B VENEER G SHORELINE ESC AND WALL EXHIBIT PLAN SCALE 1"=100' WHEEL STOP (TYP) LANDSCAPE WALL TYPE A VENEER GUARD RAIL EXISTING STAIR GATEGATE TRV 4440 TRV 93 UMLAUF SCULPTURE GARDEN TRV BARTON BLVD ANN AND ROY BUTLER TRAIL EAST MICHAEL BUTLER SHORES AT TOWN METRO PARK WALL-3 TYPE B VENEER IRC WALL-2 TYPE B VENEER IRC F IR CB IRC IRC IRC IR IRCB CB WW WW IR CB RZIG ST. STE WW IR CB G WW WW I I I I N N O O T T P P R R C C S S E E D D N N O O S S V V E E R R I I I I E E T T A A D D Y Y B B . . V V E E R R . . O O N N I E G D R B D A O R S G N R P S N O T R A B I I I I N A L P T B H X E L L A W D N A C S E E N L E R O H S I g w d . t i b h x E i i - l l a W - L \ 4 2 0 1 5 2 0 2 \ t i b h x E i l l a W \ e p a c s d n a L \ m a e T n g s e D _ 1 \ s e i l i F j t c e o r P \ i r B _ d R _ r p S _ t r a B _ 8 1 0 - 1 0 4 0 \ p u o r G n g s e D M W M \ s c o D C C A C D u \ \ i TRAIL CONFLUENCE LANDSCAPE BED LANDSCAPE SCETION SCALE 1"=25' LANDSCAPE BED TRAIL CONFLUENCE ZILKER TRAIN SP-2025-____.___ 5 2 0 2 0 1 7 / / i l . i n m \ s r e s U \ : C M A 7 3 : 2 3 : 9 9001 N Interstate Hwy 35 Unit 102 Austin, Texas 78753 p: 512.453.0767 f: 512.453.1734 TBAE FIRM REGISTRATION NO.: 1452 TBPE FIRM REGISTRATION NO.: F-1416 TBPLS FIRM REGISTRATION NO.: 10065600 MWM #: 401-17 13640 Briarwick Drive, Suite 200 Austin, Texas 78729 512.454.4797 TBPE Firm #3162 AN COMPANY SECTIONDRAFT