1

MDOT Update

Dave Juntunen

Michigan Department of Transportation

Michigan Bridge Conference

Big Rapids

March 23, 2011

2

Bridge Scour Evaluations

• Deadline was December 12, 2009

• July 2010 all agencies 100% Complete. – Over 2000 evaluations

have been done in the last few years.

• THANK YOU!! • (A few Item 113 = 6 sneaking

into bridge data base.) – You will get a phone call

3

Scour Critical Bridge

Plan of Action (POA)

• Deadline was December 12, 2010 – Extension given to April 1, 2011

• All but 17 counties and 23 cities have completed their POAs. – Over 2000 evaluations have been done in the

last few years.

• Currently about 93% complete

• THANK YOU!!

4

Filling Out a POA

5

Purpose of Scour Plan of Action

(POA)

• Help inspectors manage scour critical bridges during flood events

• Document conditions and bridge response during flood events

• It is a “Living Document ” that is meant to be updated

6

FHWA Load Rating Review

• Many MDOT and Local

Agency bridges need to

be load rated or re-rated

to updated codes

• MDOT worked with the

FHWA and CRAM to

develop action plan with

milestones and deadlines

7

MDOT Bridge Advisories

8

Tier One

• Bridges with no Load Rating – Either NBI Item 63 (Operating Load Rating

Method) or NBI Item 65 (Inventory Load

Rating Method) is coded as “5” (No load

rating performed

– NBI Item 64F (Federal Operating Rating) =

NBI Item 66 (Inventory Rating) = 32.7 metric

tons

– Any of NBI Items 63, 64F, 65, or 66 is null

9

Tier 2

• Bridges in Poor Condition

10

Tier Three

• Wrong Methodology – Built or rebuilt between 1993 and 2010 and

rated by Allowable Stress

– Built after 2010 and not rated by LRFR

– Carries NHS traffic and rated by ASR

– Coding Incompatibility: Item 70 (Bridge Posting) < 5

– Should be closed, can’t carry 3 US Tons

– Federal ratings not in proper proportion

11

First Steps

• Check Bridge File For Load Rating Documentation – If Documentation Is

Present, Check If They Match The SI&A Load Rating Data

– Check If Assumptions Are Still Valid

• Generate MBRS Load Rating Needs Report

12

13

Michigan has a Super

Site license for Virtis

14

Bridge Analysis Summary Sheet

15

Bridge Analysis Assumption Sheet

16

Every Day Counts

• Goal – By December 2012, 25% of

bridges, constructed/reconstructed

with Federal Aid to incorporate at

least one Accelerated Bridge

Construction (ABC) or major precast

component.

17

Precast Pier Caps and Columns

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Abutments

This abutment segment took 8 minutes to place.

19

Decks and Superstructure

20

Precast Element Challenges

• Connections

• Tolerances

• Weight

21

Self Propelled Mobile Movers

(SPMT)

22

AASHTO Bridge

Preservation Partnerships http://www.tsp2.org/bridge

• Action Plan – 2011 Meeting

• St.Louis, MS

– Out-reach to local agencies

– Develop Performance Measures

– Regional collection of specifications, guides, standards

23

Track Deterioration (Know how long things last)

Black Rebar

Deck time to

Poor = 35

years

Epoxy

Coated

Rebar

Deck

time to

poor =

70+

years

24

Stainless Steel Rebar

• Use on high volume routes, traffic and rail

• Reduced deck thickness

• Anywhere you don’t want to come back

25

MDOT Scoping Manual

• Bridge Sections

in Manual – Understanding

Bridge Condition

Data (pg 4-7

– Signs of Bridge

Distress (pg 5-30)

– Bridge Preservation

Rules (pg 5-38)

26

MDOT Bridge Operations (Contacts for Local Agencies)

• Dave Juntunen (Engineer of Bridge Operations)

– Phone: 517-322-5668

– e-mail: juntunend@michigan.gov

• Robert Kelley (Bridge Management Unit)

– Phone: (517) 322-1398

– e-mail: kelleyr@michigan.gov

• Richard Kathrens (Bridge Inspection Program

Manager) – Phone: 517- 322-5715

– e-mail: KathrensR@michigan.gov

27

MDOT Bridge Operations (Contacts for Local Agencies)

• Vacant (Load Rating Program Manager)

• Creightyn McMunn (Load Rating Engineer) – Phone: 517-322-1186

– e-mail: mcmunnc@michigan.gov

• Lou Taylor (Fracture Critical & Movable Bridges) – Phone: (517) 322-6092

– E-mail: taylorlo@michigan.gov

• Kelley Davis (Fatigue & Scour) – Phone: (517) 322-6796

– e-mail: kellyd@michigan.gov

• Linda Reed (Bridge Scoping) – Phone: 517-322-5622

– e-mail: reedl@michigan.gov

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Thank You