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I-5/SR 18/SR 161 Interchange Interchange Improvements Hung Huynh

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Presentation on theme: "I-5/SR 18/SR 161 Interchange Interchange Improvements Hung Huynh"— Presentation transcript:

1 I-5/SR 18/SR 161 Interchange Interchange Improvements Hung Huynh
Project Engineer Lynn Peterson Secretary of Transportation Lorena Eng NW Region Administrator City Council Study Session Federal Way City Hall March 3rd, 2015

2 Agenda I-5/SR 18/SR 161 Triangle Phase 2 Interchange Improvements
Project History (Prior to Phase 2) Phase 2 Overview Challenges Facing Phase 2 Next Steps for Phase 2 Questions & Answer ___

3 Todd Beamer High School
I-5/SR 18/SR 161 Triangle Phase 2 Interchange Improvements Before Project (2010) City of Federal Way S 356th St Lowe’s Todd Beamer High School Walmart 16th Ave S Home Depot Costco I-5 SR 161 SR 18 ___

4 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements 2003 – State Nickel funding package provided partial funding 2005 – State Transportation Partnership Program provided partial funding 2005 – Federal SAFETEA funding package provided additional funding 2010 – Begin construction of Phase I 2013 – Phase I open to traffic 2013 – State Legislature funded 30% design of Phase II ___

5 Todd Beamer High School
I-5/SR 18/SR 161 Triangle Phase 2 Interchange Improvements Existing (2014) City of Federal Way S 356th St Lowe’s Todd Beamer High School 16th Ave S Walmart Home Depot Costco I-5 SR 161 SR 18 ___

6 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements Phase 2 Baseline Design City of Federal Way Realign 16th Ave S to move intersection away from SR 161 S 356th St Modify ramp to improve storage 16th Ave S I-5 SR 161 Construct bridge for off ramp to SR 161 Construct bridge over SR 18 for loop ramp Construct new ramp to S 356th St SR 18 ___

7 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements Taco Time Lowe’s Chevron S 356th St New Off Ramp 16th Ave S SR 161 Jet Chevrolet ___

8 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements Phase 2 Baseline Design City of Federal Way S 356th St 16th Ave S I-5 SR 161 Cost Estimate: $60,000,000 SR 18 ___

9 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements Phase 2 Baseline Design City of Federal Way S 356th St 16th Ave S I-5 SR 161 Cost Estimate: $60,000,000 SR 18 ___

10 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements Value Engineering/Practical Design Recommendations City of Federal Way Recommendation #5: Construct roundabout instead of realigning 16th Ave S S 356th St 16th Ave S I-5 SR 161 Recommendation #4: Eliminate loop ramp Recommendation #7: Move ramp terminal SR 18 ___

11 VE/PD Recommendation No. 4
I-5/SR 18/SR 161 Triangle Phase 2 Interchange Improvements I-5 I-5 SR 18 SR 18 VE/PD Recommendation No. 4 Baseline Design ___

12 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements VE/PD Recommendation #4 SR 18 SR 18 I-5 VE/PD Recommendation I-5 ___

13 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements Advantages Eliminates the need for a bridge over SR 18 Reduces geotechnical risks Less construction cost Eliminates the merge on eastbound SR 18 Still allows for future expansion VE/PD Recommendation #4 SR 18 SR 18 I-5 VE/PD Recommendation I-5 Disadvantages Introduces delays to eastbound SR 18 ___

14 VE/PD Recommendation #5
I-5/SR 18/SR 161 Triangle Phase 2 Interchange Improvements Lowe’s Lowe’s Taco Time Taco Time Chevron Chevron Jet Chevrolet Jet Chevrolet VE/PD Recommendation #5 Base Design ___

15 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements VE/PD Recommendation #5 Taco Time Lowe’s Chevron S 356th St 16th Ave S Jet Chevrolet I-5 SR 161 ___

16 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements VE/PD Recommendation #5 Advantages Easier to perform left turns and U-turns Improved intersection operations during peak periods Lower intersection speeds Less intersection conflicts Less maintenance Less right-of-way cost Taco Time Lowe’s Chevron S 356th St Disadvantages May require metering at the entry to the roundabout More traffic disruption during construction Higher construction cost May not reduce the number of driveways that need to be closed Move traffic closer to apartment building 16th Ave S Jet Chevrolet I-5 SR 161 ___

17 VE/PD Recommendation #7
I-5/SR 18/SR 161 Triangle Phase 2 Interchange Improvements Lowe’s Lowe’s Home Depot Home Depot Jet Chevrolet Jet Chevrolet VE/PD Recommendation #7 Base Design ___

18 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements VE/PD Recommendation #7 Taco Time Lowe’s Chevron S 356th St 16th Ave S Jet Chevrolet I-5 SR 161 ___

19 I-5/SR 18/SR 161 Triangle Phase 2
Interchange Improvements Advantages Less right-of-way cost Allow most existing businesses to remain Improve access to WSDOT excess property VE/PD Recommendation #7 Taco Time Lowe’s Chevron S 356th St 16th Ave S Disadvantages Higher construction cost May not be able to satisfy the requirement to have off-ramp terminate at local street system Jet Chevrolet I-5 SR 161 ___

20 Next Steps I-5/SR 18/SR 161 Triangle Phase 2 Interchange Improvements
Finish evaluating VE/PD recommendations for engineering feasibility – April 2015 Stakeholders and approving authorities endorses VE/PD recommendations – Summer 2015 Update environmental documentation – Early 2016 Complete 30% design – Early 2016 Limited Access Hearing – Summer 2016 Approved right-of-way plan – Fall 2016 ___

21 Questions? I-5/SR 18/SR 161 Triangle Phase 2 Interchange Improvements
___

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