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Zachary Tess D7 Project Manager. US 14 – New Ulm to North Mankato ADT & Serious Crashes 2009 AADT (HCAADT: 12.6%); 2007-2011 K+A Crashes.

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Presentation on theme: "Zachary Tess D7 Project Manager. US 14 – New Ulm to North Mankato ADT & Serious Crashes 2009 AADT (HCAADT: 12.6%); 2007-2011 K+A Crashes."— Presentation transcript:

1 Zachary Tess D7 Project Manager

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

3 Constrained

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5 Corridor Typical - (WB Construction Shown)

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8  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  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 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 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 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  Constrained ◦ Pros  Less impacts to farmland/wetlands  Evaluation for other corridors statewide ◦ Cons  Higher Construction Cost  Higher Maintenance Cost  Corridor Typical ◦ Pros  Lower Construction Cost  Introduction of alternative intersection treatment types – RCUTs  Lower Maintenance Cost ◦ Cons  Additional farmland/wetland impacts

14  Construction ◦ $10M - $15M  4-lanes only  No Interchange  R/W ◦ $4M  4-lanes  Relocations  Interchange *Currently Unfunded

15  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  TH 14/TH 15 Intersection Discussion ◦ Alternatives ◦ Discussion of inclusion with MN River Bridge in New Ulm in 2018

17  Contact Information ◦ Zachary Tess – D7 Project Manager ◦ ◦  Corridor Website ◦ tonmankato/ tonmankato/

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