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The four tunnel possibilities for the replacement of Interstate 81 through Syracuse, N.Y.
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II‐‐81 in 196781 in 1967
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Stakeholders’ Advisory W ki GWorking Groups
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Purpose of the SAWGsPurpose of the SAWGs
Stakeholders’ Advisory Working Groups (SAWGs)• Role• Rules of Engagement • Expectationsp• Potential Topics
Alternative presentation/discussionAlternative presentation/discussion
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Preliminary Alternatives DevelopmentPreliminary Alternatives Development
No Build Alternative‐‐baselineViaduct Alternatives‐‐remove and replace the viaductStreet‐Level Alternatives‐‐remove the viaduct and convert to a surface level highway; re designate I 481 as I 81surface level highway; re‐designate I‐481 as I‐81Depressed Highway Alternatives‐‐remove the viaduct and replace with an uncovered below grade highwayTunnel Alternatives‐‐remove the viaduct and replace with a tunnelOth Alt ti l t I 81 t th hi hOther Alternatives—relocate I‐81 to another highway alignment (i.e., western bypass or West Street)
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SAWG OpportunitiesSAWG Opportunities
It does not by itself result in economic development for City and RegionTo optimize opportunity, this working group can:• Contribute local knowledge and expertise • Discuss/guide/research economic developmentDiscuss/guide/research economic development consequences
Initial SAWG Work SessionsInitial SAWG Work SessionsStrength, weakness, opportunity andopportunity and threat assessment for viaduct corridor
Identifying Future SAWG AgendasIdentifying Future SAWG Agendas
Specific Economic Development Topicsp p p• Downtown/Hill linkages• Eds /Meds and other key sectorsEds /Meds and other key sectors• Community retail and services• Supporting business during construction• Supporting business during construction• Regional economic trends• Business retention/attraction• Business retention/attraction
Tunnel Alternatives Review
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Tunnel Alternatives Tunnel Alternatives
Tunnel on current alignment• T‐1: Martin Luther King East (formerly Castle Street) to Butternut Street, 2 mile length
Butternut StButternut St
• T‐2: MLK East to Genesee Street, 1 mile length
Tunnel on western alignment Martin LutherMartin Luther
Genesee StGenesee St
Tunnel on western alignment• T‐3: Tunnel under Townsend StreetTunnel on eastern alignment
Martin LutherMartin LutherKing EastKing East
g• T‐4: Tunnel on eastern alignment (81’ below Syracuse)
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Downtown Tunnel AlternativesDowntown Tunnel Alternatives
Two‐lane tunnel in both directionsHighway would be upgraded to current standardsAdds missing connectionsAdds missing connections from/to I‐81 and I‐690*• I‐690 eastbound to I‐81I 690 eastbound to I 81 northbound
• I‐81 southbound to I‐690 westbound
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*Note: Applies to all proposed I‐81 alternatives
Almond St. TunnelAlmond St. Tunnel
XX
XMcBride McBride St.St.
NORTH
XX
Adam
s St.
Adam
s St.
arrison
arrison
St.St.
Mon
roe
Mon
roe St.St.
Jackson
Jackson St.
St.
Taylor St.
Taylor St.
Burt St.
Burt St.
enesee
en
esee
St.St.
Fayette
Fayette St.
St.
hing
ton
hing
ton St.
St.
rie Blvd.
rie Blvd.
Water
Water St.St.
Plan
HHJJTT GG FF
Was
Was ErErWW
Jackson St. Adams St.Harrison St.
Genesee St.Fayette St.
Washington St.Water / McBride Sts.
Erie St.Monroe St.
Madison St.Cedar St.Martin Luther
King East
Railroad
Street‐level Roadway
Burt St. Taylor St.
Tie into I-690
Tunnel
5,500 ft.
Cut off Side Streets Shown in RedTunnel
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Profile
Almond St. Tunnel AlternativesAlmond St. Tunnel Alternatives
NORTH
ride St.
ride St.
rine St.
rine St.
se Ave.
se Ave.
I‐690 W off‐ramp
Burnet Ave.Burnet Ave.
McBr
McBr
t.t.
Cathe
Cathe
Crou
sCrou
s
I‐81 N on‐rampp
Erie Blvd.Erie Blvd.
Water St.Water St.
Salin
a S
Salin
a S
I‐690 E on‐ramp
Severed StreetsErie Blvd. and State. St. lowered 10’ under I‐81
Washington St.Washington St.
Fayette St.Fayette St.
St.
St.
wnsen
d St.
wnsen
d St.I‐690 E & I‐81 S off‐ramps
lowered 10 under I 81
Legend:
I‐81
Genesee St.Genesee St.
State S
State S
Tow
Tow
Almon
d St.
Almon
d St.
Access to I‐690 W located at West St.
I‐690
Direct Connectors
Local Ramps
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Local Access and Connectivity Local Streets
Almond St. Tunnel AlternativesAlmond St. Tunnel Alternatives
Maximizes area above tunnel and along Almond Street forStreet for• Economic development opportunities• Urban design improvementsUrban design improvementsEliminates viaduct barrier and improves pedestrian connectivityHigh construction costsHigh future life‐cycle and maintenance costsE i ili l iExtensive utility relocations35‐45 potential full property takings
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Almond St. Tunnel SectionAlmond St. Tunnel Section
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Almond St. Tunnel PlanAlmond St. Tunnel Plan
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Almond St. Tunnel Potential ViewAlmond St. Tunnel Potential View
proposedBird’s Eye View Looking North
proposed
existing
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Almond St. Tunnel Potential ViewAlmond St. Tunnel Potential ViewAlmond and Harrison Looking North
proposedproposed
existing
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Almond St. Tunnel Potential ViewAlmond St. Tunnel Potential ViewAlmond and Harrison Looking North
proposedproposed
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existing
Almond St. Existing Soil ConditionsAlmond St. Existing Soil Conditions
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CutCut‐‐andand‐‐Cover ConstructionCover Construction
Due to poor soil conditions, cut‐and‐cover construction requiredconstruction required• Jacked‐box under railroad• Disposal and treatment of saline ground water
requiredrequiredConstruction steps:• Remove existing viaduct and piers• Excavate trench• Excavate trench• Relocate and support utilities• Construct temporary support walls• C t t t l i ti• Construct tunnel in sections• Cover up tunnel with soil and new local street
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Note: Applies to Downtown tunnels only
CutCut‐‐andand‐‐Cover ConstructionCover Construction
Traffic conditions during constructionconstruction• Divert traffic to I‐481 and I‐690• Maintain local north‐south trafficMaintain local north south traffic on temporary Almond Street runaround
• Maintain local east‐west trafficMaintain local east west traffic on temporary decking over trench
Potential constructionPotential construction duration: 5‐6 years
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Note: Applies to Downtown tunnels only
Townsend St. Tunnel AlternativeTownsend St. Tunnel Alternative
Alternative explored because:• Potentially avoid poor soil conditions on Almond St.• Construction could take place while maintaining p gtraffic on the existing viaduct
Soil conditions likely not any bettery y• Cut‐and‐cover construction required
Potential for substantial property impacts toPotential for substantial property impacts to Pioneer Homes and Downtown
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Note: Applies to Downtown tunnels only
Eastern Alignment Tunnel AlternativeEastern Alignment Tunnel Alternative
Alternative emerged through public inputpublic inputTunnel length: 5 milesNew interchangesg• I‐481, south of the City• I‐690, west of Teall Ave.• I 81 B St• I‐81, near Bear St.• Other connections to local streets are unlikely
Current I‐81 corridor would be open for other uses
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Source: Geotechnical Systems and Structures PE, PLLC
Eastern Alignment Tunnel AlternativeEastern Alignment Tunnel Alternative
existing
proposed
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Source: Geotechnical Systems and Structures PE, PLLC
Eastern Alignment Tunnel AlternativeEastern Alignment Tunnel Alternative
25
Source: Geotechnical Systems and Structures PE, PLLC
Eastern Alignment Tunnel AlternativeEastern Alignment Tunnel Alternative
proposedexisting
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Source: Geotechnical Systems and Structures PE, PLLC
Eastern Alignment Tunnel AlternativeEastern Alignment Tunnel Alternative
existing
proposed
27
Source: Geotechnical Systems and Structures PE, PLLC
Eastern Alignment Tunnel AlternativeEastern Alignment Tunnel Alternative
Soil conditions are likely more favorable for tunnel construction
C ld b d i TBM ( l
Hazardous waste site
• Could be constructed using TBM (tunnel boring machine) through bedrock
• At least 81’ below the University Hill and Lincoln Park neighborhoods •Large, new g
• Traffic would be able to continue using the current I‐81 during construction
Substantial (over 100) property takings
interchange with I‐690•Impact Lincoln Park•Numerous property takings
• Would also impact Lincoln Park, hazardous waste site, and high‐voltage power lines
• Subterranean easements requiredTeall Ave interchange would be eliminated
•High‐voltage line•Cemetery
Teall Ave. interchange would be eliminatedHighest construction cost of all alternatives
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FirstFirst‐‐cut Construction Estimatescut Construction Estimates($millions)($millions)($millions)($millions)
AlmondAlmond StreetStreet TunnelsTunnelsEasternEastern Alignment Alignment Tunnel (81’ Below Tunnel (81’ Below Syracuse)Syracuse)y )y )
High range of construction cost 2,200 3,900
Low range of construction cost 1,600 3,000 Included ItemsUtility Relocations, Temporary Construction / RoadsMaintenance of Traffic (MOT), Demolition, Mass Excavation, Elevated
Excluded ItemsPlanning & EnvironmentalDesign and Eng Support During DesignPM, CM, CI, Force AccountFinancing and Legal
Structures (including I‐481), Retaining Walls, On‐Grade Highways (including I‐481), Local Streets, Lighting, ITS, Signage, Landscaping/Streetscaping, Tunnel Civil, Tunnel Systems, Contingency, Escalation (to mid‐point of construction)
Independent TestingOwner Controlled Insurance Program Operation and Maintenance Management Reserve
(to mid‐point of construction)