National Bridge Inventory: Minnesota



  • Of the 13,358 bridges in the state, 668, or 5.0 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 802 bridges classified as structurally deficient in 2014.
  • 19 of the structurally deficient bridges are on the Interstate Highway System.
  • 1,345 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 2,757 bridges at an estimated cost of $521.3 million.
  • This compares to 3,311 bridges that needed work in 2014.

County Year Built Daily Crossings Type of Bridge Location
Dakota 1959 99,000 Urban Interstate I 35W over UP RR, Cliff Rd (Csah32)
Dakota 1980 85,000 Urban Interstate I 494 over Th 156 (Concord Street)
Ramsey 1963 77,000 Urban Interstate I 35E over Shepard Road
Anoka 1962 66,000 Urban freeway/expressway US 10 over Rum River
Hennepin 1964 65,500 Urban Interstate I 94 WB over Shingle Creek
Hennepin 1980 65,500 Urban Interstate I 94 EB over Shingle Creek
Hennepin 1964 61,000 Urban Interstate I 694 EB over Shingle Creek
Hennepin 1957 51,000 Urban Interstate I 35W SB over 106th St W
Hennepin 1957 51,000 Urban Interstate I 35W NB over 106th St W
Hennepin 1967 48,500 Urban Interstate I 35W SB over TH 65 NB
Washington 1966 36,500 Urban Interstate I 694 NB over I 94; Collector Roads
Washington 1966 36,500 Urban Interstate I 694 SB over I 94; Collector Roads
Hennepin 1972 24,600 Urban minor arterial Rockford Rd over US 169
Sherburne 1941 23,300 Urban other principal arterial US 10 over Elk River
Scott 1955 22,500 Rural arterial US 169 over Th 21
Hennepin 1967 21,500 Urban other principal arterial Th 55 EB over Franklin Ave
Hennepin 1956 21,500 Urban other principal arterial US 169 SB over Elm Creek
Hennepin 1956 21,500 Urban other principal arterial US 169 NB over Elm Creek
Polk 1963 20,740 Urban other principal arterial US 2 over Red River
Anoka 1996 20,100 Urban minor arterial Foley Blvd over US 10, Ramp; Mn 47
Hennepin 1927 20,000 Urban minor arterial Csah 158(Vernon A) over Cp Rail
St. Louis 1972 20,000 Urban other principal arterial US 53 over 19th; 20th St Conn
Hennepin 1966 20,000 Urban Interstate I 94 WB On Ramp over I 94; Th 65
Hennepin 1979 19,474 Urban minor arterial Csah 15 over Browns Bay-Tanager Lk Ch
Hennepin 1967 19,100 Urban minor arterial 4th St over I 35W
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 289 278,070 3,175,147 4 1,970 29,200
Rural arterial 694 510,590 4,111,621 10 4,892 73,539
Rural minor arterial 1,017 482,987 2,564,028 13 6,474 25,171
Rural major collector 1,956 706,035 1,864,453 121 31,645 101,247
Rural minor collector 1,324 350,818 485,818 94 13,095 26,102
Rural local road 5,707 879,977 640,819 334 41,401 37,274
Urban Interstate 438 963,385 16,958,557 15 14,305 721,050
Urban freeway/expressway 230 608,830 7,731,346 1 1,980 66,000
Urban other principal arterial 354 637,121 5,987,330 11 33,543 182,165
Urban minor arterial 642 1,202,987 7,843,439 33 87,000 336,486
Urban collector 317 305,645 1,681,255 11 7,670 60,973
Urban local road 390 206,194 850,317 21 6,353 27,484
Total 13,358 7,132,639 53,894,130 668 250,327 1,686,691
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 8 $1 1,738 474
Widening & rehabilitation 1 $0 1,550 96
Rehabilitation 672 $86 1,687,037 250,926
Deck rehabilitation/replacement 3 $0 62 268
Other structural work 2,073 $434 9,092,686 824,017
Total 2,757 $521 10,783,073 1,075,782

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.

38
from 37 in 2017

in the nation in % of structurally deficient bridges

1. Rhode Island 23.1%
37. Maryland 5.1%
38. Minnesota 5.0%
39. Virginia 4.6%

24
from 24 in 2017

in the nation in # of structurally deficient bridges

1. Iowa 4,675
23. Alabama 689
24. Minnesota 668
25. Virginia 646
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.
  • Privacy & Cookies Policy
Connect With Us

Copyright © 2019 American Road & Transportation Builders Association