i-90 exit 406 interchange modification study and ......market public meeting & open house #2...

MARKET

Public Meeting &

Open House #2

I-90 EXIT 406 INTERCHANGE

MODIFICATION STUDY AND

ENVIRONMENTAL ASSESSMENT

JANUARY 23, 2017

PRESENTATION WILL BEGIN AT APPROXIMATELY 6:05 P.M.

I-90 Exit 406 IMJR and EA

TODAY’S MEETING

Purpose: Gather feedback for further refinement and screening of “Build Alternatives.”

1. Overview of study

2. Interchange and Corridor Alternatives development process

3. Presentation of Interchange and Corridor “Build Alternatives”

No preferred alternatives have been identified at this point

I-90 Exit 406 IMJR and EA

STUDY TEAM

• Study Advisory Team • South Dakota Department of Transportation (SDDOT)

• Federal Highway Administration (FHWA)

• Sioux Falls Metropolitan Planning Organization (MPO)

• City of Brandon

• Study Consultant • HR Green

• Short Elliott Hendrickson (SEH)

• 106 Group

I-90 Exit 406 IMJR and EA

INTERCHANGE IMPROVEMENTS TIMELINE

• Study – 2016-2017

• Design

• Construction – letting in FY 2022-2025

I-90 Exit 406 IMJR and EA

ENVIRONMENTAL ASSESSMENT

A. To determine the significance of impacts from proposed action

A. Establish Purpose and Need

B. Develop and evaluate alternatives

C. Identify significance of environmental outcomes

D. Resource agency consultation and public involvement

B. Conclusion - EIS or FONSI

I-90 Exit 406 IMJR and EA

INTERCHANGE MODIFICATION JUSTIFICATION

REPORT (IMJR)

A. 8 policy requirements for new or change in access

A. Sufficient design and support to substantiate request

B. Detailed technical analysis

B. Concurrent with and feeds into Environmental

Assessment

I-90 Exit 406 IMJR and EA

STUDY AREA

• I-90 Exit 406 Interchange

• SD 11 / Splitrock Blvd

I-90 Exit 406 IMJR and EA

A. Establish issues and needs

B. Concept development and initial

screening

C. Refine Build Alternatives and

analysis

D. IMJR and EA development;

identify proposed Preferred Alternative

Complete

Complete

In progress –

February 2017

February 2017 – July 2017

STUDY ACTIVITIES AND SCHEDULE

I-90 Exit 406 IMJR and EA

ALTERNATIVES DEVELOPMENT • Future-year traffic volumes

• NB to WB movement

• EB to SB movement

• Ramp terminal intersection sight angles

• Vehicle-vehicle conflict locations

• Large truck turning movements

• Continuous pedestrian/bicycle accommodations

• On- and off-ramp lengths

I-90 Exit 406 IMJR and EA

ALTERNATIVES DEVELOPMENT

Maintenance of traffic

• Full closure with detour routes

• Temporary bridge

• Existing bridge

I-90 Exit 406 IMJR and EA

PRELIMINARY CONCEPT SCREENING

A. Interchanges: 11

B. Corridors: 4

C. Notable differentiators • Transmission tower

impacts

• Right-of-way needs

• Bridge area

• Cost

• Cultural resources

4 Build Alternatives Carried Forward

3 Build Alternatives Carried Forward

I-90 Exit 406 IMJR and EA

BUILD ALTERNATIVES

• Interchange Alternatives

• Corridor Alternatives

I-90 Exit 406 IMJR and EA

STANDARD DIAMOND I-90 EXIT 406 INTERCHANGE

• Signalized ramp terminals

• Dual NB to WB left-turn

lanes

• Free EB to SB right-turn

• Maintain traffic via

temporary bridge or detours

I-90 Exit 406 IMJR and EA

STANDARD DIAMOND

SHIFTED WEST I-90 EXIT 406 INTERCHANGE

• Similar to Standard

Diamond

• Maintain traffic via

existing bridge

I-90 Exit 406 IMJR and EA

STANDARD DIAMOND W/

ROUNDABOUTS SHIFTED WEST I-90 EXIT 406 INTERCHANGE

• Roundabout intersections

• Dual NB to WB lanes

• Free EB to SB right-turn

• Maintain traffic via

existing bridge

I-90 Exit 406 IMJR and EA

DIVERGING DIAMOND I-90 EXIT 406 INTERCHANGE

• Similar to Standard

Diamond

• Free NB to WB left-turn

• Free EB to SB left-turn

• Maintenance of traffic on existing bridge or temporary bridge

I-90 Exit 406 IMJR and EA

5-LANE UNDIVIDED SD 11/SPLITROCK BLVD CORRIDOR

• Full access intersections

• Proposed access

modifications

• Sidewalk & bicycle

accommodations on both

sides

I-90 Exit 406 IMJR and EA

4-LANE DIVIDED SD 11/SPLITROCK BLVD CORRIDOR

• TBD

• TBD

• ¾ access intersections

• Raised median

• Similar sidewalk & bicycle accommodations as 5-lane

• 9th Avenue and Redwood Blvd

I-90 Exit 406 IMJR and EA

BACKAGE ROADS SD 11/SPLITROCK BLVD CORRIDOR

• Provide business access

via Express Avenue

• Varying levels of

reconstruction

I-90 Exit 406 IMJR and EA

NORTH OF I-90 SD 11/SPLITROCK BLVD CORRIDOR

• Retain existing corridor

• Access modifications

• Potential shared-use path

• Hemlock Blvd intersection

I-90 Exit 406 IMJR and EA

HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR

• Ease truck turn

• No conflicts avoided in

NB direction

I-90 Exit 406 IMJR and EA

HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR

• Widened to the west

• No conflict with NB

thru traffic

• Property impact

I-90 Exit 406 IMJR and EA

HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR

• No conflict with NB

thru traffic

I-90 Exit 406 IMJR and EA

HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR

• No conflict with NB

thru or left-turn traffic

I-90 Exit 406 IMJR and EA

HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR

Traffic control/warning

alternative, examples

include:

• Intersection conflict

warning system

• Signalized control

I-90 Exit 406 IMJR and EA

TODAY’S INVOLVEMENT OPPORTUNITIES

No preferred alternative has

been selected yet…

• Please provide feedback on

the developed alternatives

• Will help in further

refinement and screening

Comments

• Leave comment form at entryway

• Mail/email comment form to project contact

• Discuss with project representatives

• Submit comment via project website

• Due by February 6

I-90 Exit 406 IMJR and EA

THANK YOU!

Project Website

www.sehinc.com/online/406

Next Public Meeting:

Spring/Summer 2017

Project Contacts

Jon Wiegand, PE, PTOE

Consultant Project

Manager

HR Green, Inc.

605-221-2656

jwiegand@hrgreen.com

Steve Gramm, PE

SDDOT Project Manager

South Dakota Department of

Transportation

605-773-6641

steve.gramm@state.sd.us