Arboretum Bridge and Trail Design Concept Design Meeting | 5.21.2019 - - PowerPoint PPT Presentation

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Arboretum Bridge and Trail Design Concept Design Meeting | 5.21.2019 - - PowerPoint PPT Presentation

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Arboretum Bridge and Trail Design Concept Design Meeting | 5.21.2019 & 5.22.2019 Presenters: Michael Commisso, National Park Service Kyle Ohlson, District Department of Transportation Joseph Spadea, Pennoni Agenda Meeting Purpose: A

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Arboretum Bridge and Trail Design

Concept Design Meeting | 5.21.2019 & 5.22.2019

Presenters:

Michael Commisso, National Park Service Kyle Ohlson, District Department of Transportation Joseph Spadea, Pennoni

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Agenda

  • Meeting Purpose:

A New Pedestrian Bridge and Trail

  • Project History & Location
  • Site Context / Design Constraints
  • Recommended Bridge Elevation
  • Additional Considerations
  • Open House

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Meeting Purpose

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  • Arboretum

Bridge & Trail

  • Anacostia

Waterfront Initiative

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SLIDE 4

Project History

  • EA / FONSI – 2011 / 2012
  • NPS in collaboration with DDOT to realign Section 3 of ART

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Project Benefits

  • Provide a safe and more natural

Anacostia River experience

  • Feature connection between east

and west trail network

  • Bridge as place for both trail and

river users

  • Extension of US National Arboretum

/ NPS educational opportunities and programs

5

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SLIDE 6

Project Location

6 6

Project Location

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SLIDE 7

7 7

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8 8

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9 9

Concept Design

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10 10

Concept Design

CROSS-SECTION

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Concept Design

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Ear EarlyConce cepts from EA/FONSI

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12 12

Concept Design

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Site Context

13 13  Photo 1. Looking towards US

National Arboretum, West Ba Bank of the Anacostia Ri River

 Photo 2. Looking towards future East

Abutment towards Kenilworth Park

 Photo 3. View looking North from

Kenilworth Park, East Side

 Photo 4. Adjacent Kenilworth Park

Trail segm gment, East Side

1 2 3 4

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Site Context

14 14  Photo 5. View from Ar Arboretum side looking towards Kenilworth Park  Photo 6. View from Kenilworth Park  Photo 7. View of existing trail connection  Photo 8. View of existing trail connection

5 6 7 8

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Site Context

15 15  Photo 9. View of turf and fields looking north  Photo 10. View of existing seawall, looking north  Photo 11. View of mature trees with Kudzu

9 10 11

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Site Context

16 16

12 13 15 14

 Photo 12. View towards arboretum

fence

 Photo 13. View from west shore looking

west

 Photo 14. View from west shore

Looking g northeast

Photo 15. View from west shore

Looking southeast

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Site Context

17 17  Kenilworth Trail by Aquatic Gardens  Anacostia Ri

River Trail over CS CSX

 Kenilworth Trail Pedestrian Br

Bridge near Dean an Ave.

 Anacostia Ri

River Trail over CS CSX

 Anacostia Ri

River Trail over CS CSX

  Anacostia Ri

River Trail along Section E of Anacostia Park

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Design Constraints

Ear EarlyConce cepts from EA/FONSI

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Design Constraints

  • Kenilworth Landfill
  • Two Seawalls
  • Freeboard
  • MHW EL. 2.04
  • 100 yr EL. 15.00
  • DEM: 2 ft. above 100 yr
  • Construction Footprint

& Cost

  • Future Maintenance
  • Aesthetics

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Kenilworth Park Landfill Limits Anacostia River East Seawall Helps define minimum bridge height/under- clearance

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Design Constraints

20 20  EA/ A/FONSI Concepts (2011-2012) 2012)  Early Design Concepts (2016-2017) 2017)

Hammer-head Pie ier  Tapered P Pie ier   Pie ier g geometry v varie ies dramatic icall lly b based o

  • n d

dual l gir irder a and t truss superstructure t types. Fla lared P Pie ier 

 Early Pier Concepts (2016-2017) 2017)

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Design Constraints

21 21

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 Railing alternatives  Railing lighting alternatives  Georgetown Waterfront Park Ra Railing  Rock Cr Creek Park Ra Railing

Design Constraints

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Design Constraints

  • Proposed USCG

Channel

  • 80’ Wide x 16’ High
  • 20’ buffers
  • 120’ Span

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Design Constraints

  • Proposed USCG

Channel

  • 80’ Wide x 16’ High
  • 20’ buffers
  • 120’ Span

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SLIDE 25

Design Constraints

  • Proposed USCG

Channel

  • 80’ Wide x 16’ High
  • 20’ buffers
  • 120’ Span

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SLIDE 26

Additional Considerations

26 26

At 225’ wide, (low tide) this stretch

  • f the Upper Anacostia allows

ws fo for 5 lanes – two wo upstream, two wo downstream, one fo for traff ffic c separation / stationary instruct ction. Lanes are 45’ wide each River User Safety ty:

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Original Span Configuration

27 27

  • Span arrangement same as EA/FONSI Conce

cept

  • Verti

tical clearance per DEM

90’ 90’ 45’ x 2 x 2 x 2 x 2 x 1 x 1

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Alternative Span Configuration

28 28

  • Shifted East (18’-6”)

90’ 90’ 45’ x 2 x 2 x 2 x 2 x 1 x 1

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New Span Configuration

29 29

  • Shifted Ea

East t – with Spans 2 and 3 lengthened to 132’-6”

  • Pier 3 Integral with

th Seawall

90’ 90’ 45’ x 2 x 2 x 2 x 2 x 1 x 1

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30 30

Original Span Confi figuration

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New w Span Configuration

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US NATIONAL ARBORETUM KENILWORTH PARK

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US NATIONAL ARBORETUM KENILWORTH PARK

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  • 30 Day

ay Input Peri riod

  • Contin

inued Publi lic Outre reac ach & Agency Coordin inatio ion

  • Geotechnic

ical al testin ing

  • 65% Design

ign

  • Foll

llow-up Public lic Meetin ing

  • 90% Design

ign

  • Submis

issio ion of Plan ans, Specif ific icatio ions & Estim imates

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Next Steps

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Thank You

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Contact Us:

Stacee Hemby Public Outreach Coordinator stacee@tbaconnects.com www.anacostiawaterfont.org

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Site Visit Video

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