National Bridge Inventory: Vermont



  • Of the 2,778 bridges in the state, 66, or 2.4 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 132 bridges classified as structurally deficient in 2014.
  • 3 of the structurally deficient bridges are on the Interstate Highway System.
  • 176 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 1,198 bridges at an estimated cost of $561.2 million.
  • This compares to 1,286 bridges that needed work in 2014.

County Year Built Daily Crossings Type of Bridge Location
Washington 1928 15,500 Urban other principal arterial US 302 ML over Stevens Branch
Chittenden 1964 13,800 Urban other principal arterial US 2 ML over I 89 under US 2
Chittenden 1964 13,350 Urban Interstate I 089 ML over Malletts Creek
Addison 1920 12,200 Urban minor arterial VT 030 ML over VT 30 over VT RR
Addison 1920 7,300 Urban collector City Merrw over Mer Row over VT RR
Windham 1926 6,500 Rural minor arterial VT 1 ML over N. Br. Deerfield River
Windham 1963 6,450 Rural Interstate I 091 ML over I 91 over TH 1 Saxton
Windsor 1962 6,200 Rural arterial VT 103 ML over Williams R. & Gmrr
Rutland 1956 5,900 Rural arterial US 4 ML over Ottauquechee River
Windsor 1961 5,600 Rural major collector VT 011 ML over Brook
Windham 1965 5,500 Rural Interstate I 091 ML over I 91 over Gm RR Wlmsr
Windsor 1962 5,300 Rural arterial VT 103 ML over Williams River
Washington 1926 5,200 Rural major collector VT 012 ML over Dog River
Washington 1936 4,700 Rural minor arterial VT 014 ML over Winooski River
Washington 1928 4,100 Rural minor arterial VT 014 ML over Pekin Brook
Orleans 1933 3,700 Rural major collector VT 058 ML over Barton River
Washington 1961 3,600 Rural major collector US 2 ML over Little River
Rutland 1932 3,300 Rural minor arterial VT 1 ML over West Branch Tweed River
Chittenden 1964 3,200 Rural major collector US 2 ML over I 89 under US 2
Washington 1928 3,100 Rural minor arterial VT 014 ML over Kingsbury Branch
Lamoille 1928 3,000 Rural major collector VT 15A Alt over Lamoille River
Washington 1928 2,830 Rural local road C22 over Thatcher Brook
Washington 1960 2,500 Rural major collector US 2 ML over I 89 & Necr Under U.S.2
Washington 1919 2,500 Rural minor arterial VT 014 ML over Kingsbury Branch
Lamoille 1928 2,500 Rural major collector VT 01C Alt over Gihon River
Type of Bridge Number of Bridges Area of All Bridges
(sq. meters)
Daily Crossings on All Bridges Number of Structurally Deficient Bridges Area of Structurally Deficient Bridges
(sq. meters)
Daily Crossings on Structurally Deficient Bridges
Rural Interstate 255 204,821 1,961,202 2 4,543 11,950
Rural arterial 119 98,165 681,170 3 1,932 17,400
Rural minor arterial 260 99,985 975,510 10 4,261 32,100
Rural major collector 527 149,467 1,019,779 16 8,928 37,090
Rural minor collector 174 29,747 96,440 1 413 100
Rural local road 1,222 149,491 289,382 28 5,538 10,830
Urban Interstate 54 55,038 834,448 1 603 13,350
Urban freeway/expressway 2 977 18,200 0 0 0
Urban other principal arterial 55 50,847 511,290 2 1,274 29,300
Urban minor arterial 36 21,604 268,360 1 217 12,200
Urban collector 42 16,909 156,860 1 282 7,300
Urban local road 32 6,991 28,632 1 113 300
Total 2,778 884,043 6,841,273 66 28,104 171,920
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 171 $119 134,887 30,548
Widening & rehabilitation 0 $0 0 0
Rehabilitation 1,026 $443 2,691,684 309,914
Deck rehabilitation/replacement 0 $0 0 0
Other structural work 1 $0 100 116
Total 1,198 $561 2,826,671 340,577

About the data:

Data from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), released March 15, 2019. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

Effective January 1, 2018, FHWA changed the definition of structurally deficient as part of the final rule on highway and bridge performance measures, published May 20, 2017 pursuant to the 2012 federal aid highway bill Moving Ahead for Progress in the 21st Century Act (MAP-21). Two measures that were previously used to classify bridges as structurally deficient are no longer used. This includes bridges where the overall structural evaluation was rated in poor or worse condition, or where the adequacy of waterway openings was insufficient.

The new definition limits the classification to bridges where one of the key structural elements—the deck, superstructure, substructure or culverts, are rated in poor or worse condition. During inspection, the conditions of a variety of bridge elements are rated on a scale of 0 (failed condition) to 9 (excellent condition). A rating of 4 is considered “poor” condition.

Cost estimates have been derived by ARTBA, based on 2017 average bridge replacement costs for structures on and off the National Highway System, published by FHWA. Bridge rehabilitation costs are estimated to be 68 percent of replacement costs. A bridge is considered to need repair if the structure has identified repairs as part of the NBI, a cost estimate is supplied by the bridge owner or the bridge is classified as structurally deficient.

Bridges are classified by FHWA into types based on the functional classification of the roadway on the bridge. Interstates comprise routes officially designated by the Secretary of Transportation. Other principal arterials serve major centers of urban areas or provide mobility through rural areas. Freeways and expressways have directional lanes generally separated by a physical barrier, and access/egress points generally limited to on- and off-ramps. Minor arterials serve smaller areas and are used for trips of moderate length. Collectors funnel traffic from local roads to the arterial network; major collectors have higher speed limits and traffic volumes and are longer in length and spaced at greater intervals, while minor collectors are shorter and provide service to smaller communities. Local roads do not carry through traffic and are intended for short distance travel.

48
from 47 in 2017

in the nation in % of structurally deficient bridges

1. Rhode Island 23.1%
47. Florida 2.6%
48. Vermont 2.4%
49. Utah 2.2%

48
from 48 in 2017

in the nation in # of structurally deficient bridges

1. Iowa 4,675
47. Hawaii 78
48. Vermont 66
49. Utah 66
Full State Ranking

  • Source: Bridge data is from the 2018 National Bridge Inventory ASCII files, released by the Federal Highway Administration on March 14, 2019. Note that specific conditions on bridges may have changed as a result of recent work. ARTBA is a non-partisan federation whose primary goal is to aggressively grow and protect transportation infrastructure investment to meet the public and business demand for safe and efficient travel.
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