Willamette River Transit Bridge. Portland - Milwaukie Light Rail Willamette River Bridge Willamette River Bridge Advisory Committee
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1 Portland - Milwaukie Light Rail Willamette River Bridge Willamette River Bridge Advisory Committee
2 Vertical Clearance Tower Design Refinements Pathway Routing at Tower
3 Vertical Clearance
4 Vertical Clearance Update 4.75% 4.75% ± 75 Additional analysis on vertical clearance to occur during Preliminary Engineering
5 Vertical Clearance Presentations 5/4/09: FTA and US Coast Guard 5/7/09: River Users and Landside Stakeholders 5/13/09: Lower Columbia Region Harbor Safety Committee Assembled and analyzed data Interviewed river users who might be impacted
6 Vertical Clearance Update Climate Change Research Findings increase due to flow by 2099 Increases occur mainly during winter months Does not consider possible flow management mitigation - dams
7 Vertical Clearance Update Allowance added for Safety and potential climate change impacts 3 and 3.5 were used Analysis done with and without allowance to determine implications
8 Vertical Clearance Update Analyzed River Data Analyzed a wide range of vertical clearance alternatives (17) Example
9 Vertical Clearance Update Portland Spirit s Vessels Air Draft: 58 Air Draft: 44 Columbia Gorge (Copied from: Portland Spirit (Copied from:
10 Vertical Clearance Update Results Analyzed Graphed percent passage in December Graphed the change in % between clearances for December Determine point of diminishing return
11 Vertical Clearance Update Vertical Clearance Alternatives Analysis Portland Spirit's Columbia Gorge: 58' Air Draft Change in % Passing Between Clearance Alternatives 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 97.6% 46.8% 99.4% 99.8% Graphed percent passage in December 0.0% Vertical Clearances Change in Percent Passage Between Clearance Alternatives for December Percent Passing for December
12 Vertical Clearance Update Vertical Clearance Alternatives Analysis Portland Spirit's Columbia Gorge: 58' Air Draft Change in % Passing Between Clearance Alternatives 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 97.6% 46.8% 99.4% 99.8% Graphed percent passage in December Graphed the change in % between clearances for December 0.0% Vertical Clearances Change in Percent Passage Between Clearance Alternatives for December Percent Passing for December
13 Vertical Clearance Update Without Allowances for Safety or Climate Change Vertical Clearance Alternatives Analysis Portland Spirit's Columbia Gorge: 58' Air Draft Change in % Passing Between Clearance Alternatives 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 97.6% 46.8% 99.4% 99.8% Beyond there is No Change In % Passing 100% 0.0% Vertical Clearances Change in Percent Passage Between Clearance Alternatives for December Percent Passing for December
14 Vertical Clearance Update With Three Foot Allowance for Safety Climate Change Vertical Clearance Alternatives Analysis With Three Foot Allowance for Climate Change and Safety Portland Spirit's Columbia Gorge: 58' Air Draft Change in % Passing Between Clearance Alternatives 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 0.0% 0.8% 97.6% 98.0% 98.7% 91.9% 99.7% 99.4% 98.9% 99.8% Beyond there is Nominal Change In % Passing 98.9% vs 100% Dec: 10 days out of last 30 years All year: 55 days out of 10, Vertical Clearances Change in Percent Passage Between Clearance Alternatives for December Percent Passing fro December
15 Vertical Clearance Update With 3.5 Allowance for Safety Climate Change Vertical Clearance Alternatives Analysis With 3.5' Foot Allowance for Climate Change and Safety Portland Spirit's Columbia Gorge: 58' Air Draft Change in % Passing Between Clearance Alternatives 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 0.0% 0.1% 97.0% 97.9% 98.3% 98.6% 98.9% 90.0% 99.9% 99.7% 99.3% Beyond Beyond there there is is Nominal Nominal Change Change In % In Passing % Passing 98.9% 98.6% vs 100% vs 100% Dec: 13 days out of last 30 years All year: 68 days out of 10, Vertical Clearances Change in Percent Passage Between Clearance Alternatives for December Percent Passing fro December
16 Vertical Clearance Update Draft Findings Additional vertical clearance provides diminishing benefit to existing commercial river users at about 77.36
17 Analysis of Landside Implications Provide for stations at grade
18 Analysis of Landside Implications Provide for stations at grade Supports landside development Increases public access to transit system Improves station safety and security - Crime prevention through environmental design (CEPTED)
19 Analysis of Landside Implications South Waterfront North District Provide for stations at grade
20 Analysis of Landside Implications
21 Analysis of Landside Implications Provide for stations at grade
22 Analysis of Landside Implications
23 Analysis of Landside Implications Analyzed a wide range of vertical clearance alternatives (10) with ADA compliant ramps and landings
24 Analysis of Landside Implications Plans Developed
25 Analysis of Landside Implications Implications Tabulated
26 Analysis of Landside Implications Relative Landside Implications for Bridge Clearance Alternatives Relative Landside Implications $80,000,000 $70,000,000 $60,000,000 $50,000,000 $40,000,000 $30,000,000 Costs used as a Proxy to graphically illustrate the composite landside implications analyzed $20,000,000 $10,000,000 $ Bridge Clearance Alternatives Relative Landside Implications for Bridge Clearance Alternatives
27 Analysis of Landside Implications Relative Landside Implications for Bridge Clearance Alternatives Relative Landside Implications $80,000,000 $70,000,000 $60,000,000 $50,000,000 $40,000,000 $30,000,000 Beyond Landside Impacts Change from Nominal to Significant $20,000,000 $10,000,000 $ Bridge Clearance Alternatives Relative Landside Implications for Bridge Clearance Alternatives
28 Vertical Clearance Update Draft Findings Additional vertical clearance provides diminishing benefit to existing commercial river users at about Moderate to significant landside impacts for incremental increases in bridge vertical clearance occurs at about 77.36
29 Analysis of Landside Implications Analyzed a wide range of vertical clearance alternatives with ADA compliant ramps and landings Portland Spirit request Analyze vertical clearance using ADA ramps and landings
30 Analysis of Landside Implications Vertical Clearance 77.36
31 Analysis of Landside Implications Vertical Clearance Add ADA Ramps and Landings 77.36
32 Analysis of Landside Implications with ADA compliant ramps and landings Changes running slope 4.75% to 5.85% 23% Increase in slope Additional clearance 77.36
33 Analysis of Landside Implications 5.85% running slope Exceeds LRT maximum design standards
34 Analysis of Landside Implications 5.85% running slope Exceeds LRT maximum design standards Reduced service reliability during inclement weather
35 Analysis of Landside Implications 5.85% running slope Exceeds LRT maximum design standards Reduced service reliability during inclement weather Reduced service level single track operations for bridge inspection and maintenance
36 Analysis of Landside Implications 5.85% running slope Exceeds LRT maximum design standards Reduced service reliability during inclement weather Reduced service level single track operations for bridge inspection and maintenance Reduced average speed
37 Analysis of Landside Implications 5.85% running slope Exceeds LRT maximum design standards Reduced service reliability during inclement weather Reduced service level single track operations for bridge inspection and maintenance Reduced average speed Increased vehicle maintenance
38 Analysis of Landside Implications 5.85% running slope Exceeds LRT maximum design standards Reduced service reliability during inclement weather Reduced service level single track operations for bridge inspection and maintenance Reduced average speed Increased vehicle maintenance Draft Cost Estimate $17.2M
39 Vertical Clearance Update Continuing Research on Future River Navigational Needs Marine Highway Act of 2007 Access to Willamette Falls Locks require passage under four bridges with lower vertical clearances than Sellwood Bridge Southern Pacific Railroad Bridge I-205 Bridge Oregon City Bridge
40 Vertical Clearance Update Continuing Research on Future River Navigational Needs Marine Highway Act of 2007 Land Use changes City of Portland s Industrial Districts Atlas of 2004 Central Portland Plan Update ( )
41 Vertical Clearance Update Continuing Research on Future River Navigational Needs Marine Highway Act of 2007 Land Use changes US Coast Guard rule changes Are there trends, codes, or regulation changes that may affect future vessel height? Meeting set with USCG later this month to review Scheduling meeting with Marine Architect to review
42 Vertical Clearance Update Continuing Research on Future River Navigational Needs Marine Highway Act of 2007 Land Use changes US Coast Guard rule changes Implications if changes are made to regions dam system Future dredging of navigational routes
43 Vertical Clearance Update Future Dredging of Navigational Routes Current research indicates that Army Corps of Engineers only has plans to dredge the area north of the Broadway Bridge to support the Working Harbor Steel Bridge Copied from Working Harbor Reinvestment Strategy Report December 2006
44 Vertical Clearance Update Next Steps Continue research on implications of future river navigation Staff recommendation to Steering Committee scheduled for October Discussion - Questions?
45 Vertical Clearance Tower Design Refinements
46 Cable Stayed Refined
47 Next Steps Refinement of significant elements Tower pier walkway Railing Lighting and OCS integration Greenway Programming bicycle and pedestrian path Cable Stay - Refined
48
49 Program Pathway
50 7/2/09 Working Group Meeting SCHEME A Inclined Tower SCHEME B V Tower with Strut SCHEME C Split V Tower with Strut SCHEME D H Tower SCHEME E Steel Tower
51 Working Group Recommendation SCHEME A Inclined Tower SCHEME B V Tower with Strut SCHEME C Split V Tower with Strut SCHEME D H Tower SCHEME E Steel Tower
52 7/24/09 Working Group Meeting Tower Plan Views Tower Articulation Options
53 7/24/09 Working Group Meeting Edge Articulation - Concept
54 Edge Articulation - Developed
55 Edge Articulation - Illustrated
56 Edge Articulation - Illustrated
57 Form Articulation - Concept
58 Form Articulation - Developed
59 Form Articulation - Illustrated
60 Form Articulation - Illustrated
61 Rounded - Concept
62 Rounded - Developed
63 Rounded Illustrated
64 Rounded Illustrated
65 Tower Articulation Comparison Alternative: Edge Form Rounded Cost Premium: $1.7 M $1.7 M $5.4 M Steel tower cost was explored $20.9 M premium
66 Vertical Clearance Tower Design Refinements Pathway Routing at Tower
67 Pathway Routing at Towers
68 Pathway tight at Tower
69 Pathway tight at Tower
70 Pathway extended from Tower
71 Pathway split at Tower
72 Pathway split at Tower
73 Pathway tight at Tower
74 Pathway tight at Tower
75 Pathway extended from Tower
76 Pathway split at Tower
77 Pathway split at Tower
78 8/7/09 Working Group Meeting Analyzed each mode Pedestrian Bicycle Service Vehicles
79 8/7/09 Working Group Meeting Analyzed each mode for each alternative Base case: pathway tight to tower Joint path extended from tower Separated (split) pathway extended from tower
80 8/7/09 Working Group Meeting Reviewed characteristics that vary between alternatives Security Out of direction travel Maintenance
81 8/7/09 Working Group Meeting Reviewed characteristics that vary between alternatives Being on the bridge: Experiencing the bridge Being on the bridge: Experiencing the river Being near the bridge Transparency
82 8/7/09 Working Group Meeting Reviewed characteristics that vary between alternatives Mode conflict Stormwater and shading Accidents emergency response
83 Working Group Recommendation Alternative: Base Joint Path Separate Path
84 Working Group Recommendation Alternative: Base Joint Path Separate Path Total score: Maximum Points Available
85 Working Group Recommendation Alternative: Base Joint Path Separate Path Total score: Percent of total: 91% 68% 49%
86 Working Group Recommendation Alternative: Base Joint Path Separate Path Total score: Percent of total: 91% 68% 49% Base case has the most technical merit
87 Working Group Recommendation Cost Premium: $0 $4.2 M $5.1 M Alternative: Base Joint Path Separate Path Total score: Percent of total: 91% 68% 49% Base case has the most technical merit
88 Path Routing Discussion Cost Premium: $0 $4.2 M $5.1 M Alternative: Base Joint Path Separate Path Total score: Percent of total: 91% 68% 49% Base case has the most technical merit
89 Tower Articulation Discussion Alternative: Edge Form Rounded Cost Premium: $1.7 M $1.7 M $5.4 M Steel tower cost was explored $20.9 M premium
90 Questions? Vertical Clearance Tower Design Refinements Pathway Routing at Tower
91 Program Pathway
92 Thank you For more information, visit: trimet.org/pm
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