US 14 Expansion Nicollet to North Mankato

1. US 14 Expansion Nicollet to North Mankato Zachary Tess D7 Project Manager

2. US 14 – New Ulm to North Mankato ADT & Serious Crashes 2009 AADT (HCAADT: 12.6%); 2007-2011 K+A Crashes

3. Constrained vs. Corridor Typical Constrained

4. Constrained Inset

5. Corridor Typical - (WB Construction Shown)

6. Corridor Typical Inset

7. Construction – R/W Cost

8. Why are Construction Costs Higher in Constrained?!? • Additional Pavement & Aggregate needs • 14’ inside median vs. 4’ shoulder • Loonheads – U-turns for truck/agg equipment • Crown correction–cheaper than drainage structures • Still need R/W (south side utility poles)

9. R/W cost and Constrained Viability • Current R/W Costs - $12K/acre • Provided by District Real Estate Rep • When Construction + R/W becomes equal between alternatives • $46K/acre – Assumes HTCB in both alternatives • $66K/acre – HTCB only in constrained

10. Constrained Inset Option 1 - GDSU • 8’ SHOULDERS (DIMINISHING RETURNS FOR WIDER SHOULDERS) • KEEP 12’ LANES FOR HIGH SPEED RURAL • MINIMIZE MEDIAN WIDTH (ALLOW 3’ DEFLECTION IN THRU LANES) • RUMBLE STRIPS BOTH SIDES (CRASH HISTORY OF DROWSY/INATTENTIVE DRIVERS) • STICK WITH TUBE DELINEATORS & CONSIDER CABLE IF FUTURE NEED • SAVES 10’ OF WIDTH AND UNWARRANTED CABLE BARRIER • ~$1.5M+$1.7M

11. Corridor Typical Option 2 - GDSU • 53’ MEDIAN WIDTH WITH 1:4 INSLOPES AND 10’ DITCH BOTTOM (SAVES 13’ AND ALLOWS SPACE FOR RCI) • 12’ RIGHT LANE AND 8’ SHLD ON WB TH 14 (SAVES ADDITIONAL 2’) DELAY INSTALL OF CABLE BARRIER UNTIL WARRANTS ARE MET • SAVES 25’ OF R/W FOR ENTIRE PROJECT • ~$230,000 r/w +MATERIAL COSTS+$1.2M CABLE

12. Constrained Typical Option 3 - GDSU • RAISED MEDIAN BARRIER • USE OF 2’ SHLD REDUCES MEDIAN WIDTH BY 8’ • REDUCED MAINTENANCE AND SNOW MELT PROBLEMS • SIMILAR COST TO HIGH TENSION CABLE BARRIER • USE OF 8’ SHLD LIKE OPTION 1 YIELDS 10’ WIDTH REDUCTION • WIDTH REDUCTION SAVES ~$1.5M Tech Memo

13. Pros and ConsComparison of Alternatives • Corridor Typical • Pros • Lower Construction Cost • Introduction of alternative intersection treatment types – RCUTs • Lower Maintenance Cost • Cons • Additional farmland/wetland impacts • Constrained • Pros • Less impacts to farmland/wetlands • Evaluation for other corridors statewide • Cons • Higher Construction Cost • Higher Maintenance Cost

14. Nicollet Bypass Discussion • Construction • $10M - $15M • 4-lanes only • No Interchange • R/W • $4M • 4-lanes • Relocations • Interchange *Currently Unfunded

15. Nicollet Bypass Discussion • Why to west? • RSA – Critical Crash rate intersections • TH 14/TH 111 in Nicollet • TH 14/TH 99 in Nicollet • Local and Political Momentum • Local Infrastructure planning/needs • Wastewater treatment planning – North Mankato • City expanding • 2000 population – 890 • 2010 population – 1100 • 23.5% increase

16. Future MPC Meetings • TH 14/TH 15 Intersection Discussion • Alternatives • Discussion of inclusion with MN River Bridge in New Ulm in 2018

17. Additional Questions or Comments • Contact Information • Zachary Tess – D7 Project Manager • Zachary.tess@state.mn.us • 507-304-6199 • Corridor Website • http://www.dot.state.mn.us/d7/projects/14newulmtonmankato/

18. Joint Layout - Constrained