Asset Management: Federal Perspective on Bridge Maintenance and Preservation

Transcription

1 Bridge Maintenance and Preservation Workshop: July 1, 2008 Burlington, VT Asset Management: Federal Perspective on Bridge Maintenance and Preservation Tod Kimball, P.E. Federal Highway Administration Vermont Division Montpelier, VT

2 Presentation Scope Asset Management: What is it and Why is it Important? Bridge Maintenance and Preservation: What is it and Why is it Important? Bridge Maintenance and Preservation Practices Why Dedicated Funding for Bridge Maintenance and Preservation?

3 What is Transportation Asset Management? Transportation Asset Management is a strategic and systematic process of operating, maintaining, upgrading and expanding physical assets effectively throughout their lifecycle. It focuses on business and engineering practices for resource allocation and utilization, with the objective of better decision making based upon quality information and well defined objectives. AASHTO Subcommittee on Asset Management

4 What is Transportation Asset Management? Knowing What You Have Knowing What You Need Making Money Go Far as Possible

5 One Dollar? "If I have one additional dollar to spend on the transportation system, what is the most effective way to spend it?" Mary Peters, U.S. Secretary Transportation Former FHWA Administrator

6 Why Transportation Asset Management? As government providers and operators of transportation systems, we face an increasingly complex challenge of improving safety, mobility and the aesthetics of our highway system in an environment of constrained resources. Implementing an asset management approach is essential to ensure that we invest the public funding entrusted to us wisely, and that we minimize longterm costs in achieving our desired service level objectives. Neil J. Pedersen, Administrator, Maryland State Highway Administration and Vice-Chair, AASHTO Subcommittee on Asset Management

7 Why Transportation Asset Management? Do the Right Thing At the Right Time In the Right Place At the Right Price!!!

8 What is Maintenance? the preservation of the entire highway, including surface, shoulders, roadsides, structures, and such traffic-control devices as are necessary for safe and efficient utilization of the highway. Source: 23 U.S.C. 101 (14)

9 What is Bridge Preservation? activities performed on bridge elements or components that aim to prevent, delay, or reduce deterioration. Bridge preservation activities does not entail structural or operational improvements of an existing bridge asset beyond its originally designed strength or capacity. Source: AASHTO Subcommittee on Maintenance Bridge Task Force draft definition

10 Bridge Preservation Focus Every One Likes the glamour of a New Highway Bridge, but to keep one in service through Preservation and Maintenance is not particularly glamorous, but Important

11 TANK YOU! More Ribbon Cutting Ceremonies Like this one on a preservation project

12 National Perspective, Factors Concern regarding a number of factors: Rising traffic demand, heavier loads

13 Truck Volumes in 2000

14 Truck Volumes in 2020

15 Freight Tonnage moved by Truck Rapidly Increasing Tons (millions) Tonnage Year

16 Increasing Congestion % Increase in passenger car VMT 33% Increase in single-unit trucks VMT 34% Increase in combination trucks VMT 2% Increase in Lane Miles

17 Miles of Road vs. Miles Travelled

18 Congested Highways: Nationally

19 Congested Highways: Regionally

20 National Perspective, Factors Concern regarding a number of factors: Rising traffic demand, heavier loads Continued bridge aging and deterioration

21 Number of Bridg es 120, ,000 80,000 60,000 40,000 20,000 Number and Status of Bridges in the US 598,000 NBI Bridges 12.0% Structurally Deficient 13.3% Functionally Obsolete 80% 70% 60% 50% 40% 30% 20% 10% % o f D eficien t B rid g es 0 Pre % 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s Decade Built Source: 2007 NBI Number of Bridges % of Deficient Bridges

22 Number and Status of Bridges in VT 500 2,700 NBI Bridges 18.4% Structurally Deficient 17.3% Functionally Obsolete 80% Number of Bridges % 60% 50% 40% 30% 20% 10% % of Deficient Bridges 0 Pre % 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s Decade Built Source: 2007 NBI Number of Bridges % of Deficient Bridges

23 National Perspective, Factors Concern regarding a number of factors: Rising traffic demand, heavier loads Continued bridge aging and deterioration Limited funds for rehabilitation and replacement Inadequately funded maintenance and preservation programs

24 National Perspective, Factors States are experiencing: Reduced revenue streams Diminished buying power

25 Bridge Unit Cost Trends Avg. Unit Cost Cost/Sq. Ft Federal Aid Non Fed Aid Year Note: Ave Unit Cost not all inclusive, e.g. does not include mobilization

26 National Perspective, Factors States are experiencing: Reduced revenue streams Diminished buying power Competing cross-asset demands for available funds

27 Cross-Asset Demands RESOURCES Preservation Operations, Safety Capital Improvement Schools, EMS, Fire, Police

28 National Perspective, Needs There is a need to: 1. Assess the effectiveness of current preservation and maintenance strategies 2. Maximize the benefits of systematic preventive maintenance 3. Examine preservation procedures that lead to improved operational performance

29 National Perspective, Needs Also, there is a need to: 4. Examine strategies, innovations and technologies 5. Support Research and Development 6. Protect the investment

30 What is the Goal of Bridge Preservation? increase the service life of bridge(s) using cost-effective, timely strategies, forestall major reconstruction.

31 Future Needs and Support The Highway Bridge Preservation Community of practitioners needs upper management support to pursue and promote these bridge preservation initiatives

32 Traditional Challenges Agency Definition Bridge Expertise Agency Org. Chart Funding / Priority Counterproductive Performance Goals

33 Categories of Needs Reconstruction Rehabilitation Repair Maintenance

34 What is the Objective of Maintenance? The objective of maintenance is to keep bridge in good condition and minimize the need for repairs. Maintenance has been deferred on many bridges that now require replacement, rehabilitation or repair. To stop this cycle, maintenance needs to be planned and performed soon after the bridge is restored or the repair is made

35 Time vs. Deterioration CONDITION 40% Quality Drop 40% Q u ality Drop TIME

36 Maintenance Strategy Deferred Formal Informal Reactive Preventative Regular Intervals As-Needed

37 Results of Deferring Maintenance Condition Bad Limited Lack Most Public of Alternatives Gets Costly Control Relations Worse

38 Bridge Terminology Load Carrying Elements: Deck Superstructure Substructure Waterway Illustration first appeared in Scientific American, March 1993, Source: Illustration by Jana Brenning.

39 Consequences of Deferring Maintenance Approach settlement may be a symptom of a more serious problem

40 Consequences of Deferring Maintenance Without relief joints, concrete pavements can damage the bridge

41 Consequences of Deferring Maintenance The deck drainage system should be unobstructed and function properly.

42 Consequences of Deferring Maintenance Leaking deck joints contribute to bearing problems.

43 Consequences of Deferring Maintenance Leaking deck joints cause damage to superstructure

44 Consequences of Deferring Maintenance Leaking deck joints cause damage to substructure

45 Consequences of Deferring Maintenance Debris accumulation may cause lateral pressure and scour

46 Consequences of Deferring Maintenance Damage accelerates from salt on unprotected deck with band-aid repair.

47 Consequences of Deferring Maintenance Corrosion on steel embedded in concrete.

48 Maintenance Procedures Specified Intervals As-Needed

49 Typical Maintenance Tasks Clean Routinely Maintain Approaches Seal Deck Joints Facilitate Drainage Seal Concrete Paint Steel Remove Channel Debris Protect Against Scour Lubricate Bearings

50 Typical Maintenance Tasks Clean Routinely

51 Typical Maintenance Tasks Clean Routinely Maintain Approaches

52 Typical Maintenance Tasks Clean Routinely Maintain Approaches Seal Deck Joints

53 Typical Maintenance Tasks Clean Routinely Maintain Approaches Seal Deck Joints Facilitate Drainage

54 Typical Maintenance Tasks Clean Routinely Maintain Approaches Seal Deck Joints Facilitate Drainage Seal Concrete

55 Typical Maintenance Tasks Clean Routinely Maintain Approaches Seal Deck Joints Facilitate Drainage Seal Concrete Paint Steel

56 Typical Maintenance Tasks Clean Routinely Maintain Approaches Seal Deck Joints Facilitate Drainage Seal Concrete Paint Steel Remove Channel Debris

57 Typical Maintenance Tasks Clean Routinely Maintain Approaches Seal Deck Joints Facilitate Drainage Seal Concrete Paint Steel Remove Channel Debris Protect Against Scour

58 Typical Maintenance Tasks Clean Routinely Maintain Approaches Seal Deck Joints Facilitate Drainage Seal Concrete Paint Steel Remove Channel Debris Protect Against Scour Lubricate Bearings

59 Maintenance Activity Frequency Bridge Deck Washing (concrete) - 1 year Bridge Deck Sweeping - 1 year Seats and Beam Ends Washing 2 years Cutting and Removing Vegetation 2 years Timber Structures 2 years Cleaning and Lubricating Bearing Devices 4 years

60 Maintenance Activity Frequency (cont d) Removing Debris from Culverts 5 years Scheduled Replacement of Pourable Joints 6 years Scheduled Replacement of Compression Seal Joints 10 years Scheduled Beam Ends Painting 10 years Installation of Thin Epoxy Concrete Overlay 15 years

61 Why Funding for Maintenance? Cost Effective Minimum Traffic Disruption Lower User Costs Public Safety Reduce Need to Rehab and Replace

62 Funding for Maintenance VTrans 3R and Preventive Maintenance Design Guideline Outlines Eligible Activities Must be part of a System-wide Approach Federal Funds Administered by VTrans Experience has shown that when timely and properly applied, preventive maintenance is a cost-effective way of extending the service life of highway facilities and is therefore eligible for Federal-aid funding. VTrans 3R and Preventive Maintenance Design Guideline

63 Time vs. Deterioration Typical Deterioration Curves Very Good Preventive Corrective Repairs Condition Rehab/Replace Very Poor Age

64 Cost vs. Maintenance

65 Why Funding for Maintenance? Investment in maintenance pays dividends for years to come; a dollar we spend today on (maintaining) a bridge or culvert can save as much as ten dollars for a full replacement. It is an approach that just makes sense. Vermont Governor Jim Douglas Quoted in AGC/VT Build Board, January 2008

66 Why Funding for Maintenance? "We have made it no secret here at the agency about the need to focus on existing infrastructure, including our bridges We've recognized this problem for some time, and that's why we've made this focus on maintenance and preservation the priority at the agency." Vermont Transportation Secretary Neale Lunderville Quoted in the Rutland Herald, June 9, 2008

67 Preserving Our Investments

68 Vision: Timely bridge preservation performed today for a better transportation infrastructure tomorrow Source: AASHTO SCOM Bridge Preservation Strategic Plan

69 Presentation Summary Asset Management: What is it and Why is it Important? Bridge Maintenance and Preservation: What is it and Why is it Important? Bridge Maintenance and Preservation Practices Why Dedicated Funding for Bridge Maintenance and Preservation?

70 We, the bridge maintenance engineers of NEBMWG hold these truths to be self- evident: all joints leak, all concrete cracks, and rust never sleeps. We will strive to capitalize our way out of maintenance and maintain our way out of capital. It is our endeavor to educate others that a bridge is as important to a highway as a diamond is to a ring.

71 THANK YOU! Tod Kimball, P.E. Federal Highway Administration Vermont Division Montpelier, VT