National Bridge Inventory: Hawaii



  • Of the 1,137 bridges in the state, 78, or 6.9 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is up from 59 bridges classified as structurally deficient in 2014.
  • 3 of the structurally deficient bridges are on the Interstate Highway System.
  • 170 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 1,110 bridges at an estimated cost of $8.5 billion.
  • This compares to 1,112 bridges that needed work in 2014.

County Year Built Daily Crossings Type of Bridge Location
Honolulu 1949 73,935 Urban other principal arterial Nimitz Hwy over Kapalama Canal (E.B)
Honolulu 1932 70,400 Urban other principal arterial Nimitz Hwy over Nuuanu Strm (W.B)
Honolulu 1952 70,400 Urban other principal arterial Nimitz Hwy over Slip Cover #4 Hon Hbr
Honolulu 1934 65,350 Urban freeway/expressway Kal Hwy over Niu Strm
Honolulu 1973 56,965 Urban other principal arterial Ala Moana Blvd over Pensacola Relief Drain
Honolulu 1969 47,470 Urban other principal arterial Farr Hwy over Waiawa IC #3B FAI-H1
Honolulu 1963 39,895 Urban other principal arterial Farr Hwy over Ulehawa Strm
Kauai 1945 36,515 Rural Interstate Kuhio Hwy over Wailua River
Honolulu 1959 35,233 Urban other principal arterial Likelike Hwy over Kaneohe Str Dbl 10X8 Cbc
Honolulu 1967 33,735 Urban other principal arterial Farr Hwy over Maipalaoa Strm
Honolulu 1949 33,735 Urban other principal arterial Farr Hwy over Mailiilii Strm
Honolulu 1929 31,925 Urban minor arterial Kalakaua Ave over Ala Wai Canal
Honolulu 1965 30,300 Urban other principal arterial Farr Hwy over Dbl Sectl Pl Culvt-Strm
Maui 1980 28,585 Urban other principal arterial Piilani Hwy over Waiakoa Gulch
Maui 1980 28,585 Urban other principal arterial Piilani Hwy over Kulanihakoi Gulch
Maui 1980 28,585 Urban other principal arterial Piilani Hwy over Waipuilani Gulch Br
Honolulu 1937 26,970 Urban other principal arterial Farr Hwy over Kaupuni Strm
Honolulu 1930 26,144 Urban minor arterial Dillingham Blvd over Kapalama Canal
Honolulu 1976 23,940 Urban Interstate Quarry Access Rd over Rcp Culvt
Honolulu 1922 19,680 Urban freeway/expressway N King St over Nuuanu Strm
Kauai 1938 19,155 Rural minor arterial Kaumualii Hwy over Hanapepe River
Honolulu 1922 17,575 Rural arterial Kam Hwy over Waiahole Strm(County)
Hawaii 1950 16,565 Urban minor arterial Hawaii Belt Rd over Wailuku Strm
Honolulu 1930 13,740 Rural arterial Kam Hwy over Paumalu Strm
Honolulu 1932 13,030 Rural arterial Kam Hwy over Kaipapau Strm
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 23 195,115 976,261 1 1,463 36,515
Rural arterial 78 35,338 1,059,796 7 1,372 85,910
Rural minor arterial 180 101,458 1,393,668 15 4,280 40,354
Rural major collector 128 26,061 410,118 9 1,138 26,680
Rural minor collector 31 7,129 89,939 4 297 2,122
Rural local road 116 17,413 71,958 12 2,259 9,630
Urban Interstate 186 748,040 15,243,768 2 1,499 30,940
Urban freeway/expressway 83 54,129 3,068,853 2 1,203 85,030
Urban other principal arterial 98 68,938 3,364,779 16 10,809 617,923
Urban minor arterial 41 29,918 747,153 3 3,295 74,634
Urban collector 71 19,883 430,824 2 280 10,863
Urban local road 102 20,758 246,712 5 696 15,681
Total 1,137 1,324,180 27,103,829 78 28,592 1,036,282
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 3 $1 620 607
Widening & rehabilitation 1 $0 775 166
Rehabilitation 7 $3 8,735 21,227
Deck rehabilitation/replacement 34 $48 530,705 7,940
Other structural work 1,065 $8,441 25,982,045 1,215,095
Total 1,110 $8,493 26,522,880 1,245,035

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.

30
from 32 in 2017

in the nation in % of structurally deficient bridges

1. Rhode Island 23.1%
29. Idaho 7%
30. Hawaii 6.9%
31. Indiana 6.2%

47
from 49 in 2017

in the nation in # of structurally deficient bridges

1. Iowa 4,675
46. Arizona 150
47. Hawaii 78
48. Vermont 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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