National Bridge Inventory: California Congressional District 24


  • Of the 1,319 bridges in the counties of this district, 78, or 5.9 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 127 bridges classified as structurally deficient in 2014.
  • 20 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • Repairs are needed on 271 bridges in the district, which will cost an estimated $184.8 million.

County Year Built Daily Crossings Type of Bridge Location
Ventura 1968 72,500 Urban freeway/expressway US 101 SB over Vcy Ry
Ventura 1961 60,500 Urban freeway/expressway Route 101 SB over San Jon Crk & San Jon Rd
Santa Barbara 1961 60,500 Urban freeway/expressway US Highway 101 NB over San Jose Creek
Santa Barbara 1961 60,500 Urban freeway/expressway US Highway 101 NB over Maria Ygnacio Creek
Santa Barbara 1946 60,500 Urban freeway/expressway US Highway 101 SB over San Jose Creek
Santa Barbara 1963 54,500 Urban freeway/expressway US Hwy 101 NB over Castillo Street
Ventura 1971 43,600 Urban other principal arterial Victoria Ave over UP RR & Amtrak
Ventura 1975 43,000 Urban other principal arterial State Route 232 over US Highway 101
Ventura 1973 40,000 Rural arterial Route 101 SB over Mobil Pier Access
Santa Barbara 1959 38,000 Urban freeway/expressway U.S. Hwy 101 NB over Sheffield Drive
Santa Barbara 1907 37,500 Urban freeway/expressway U.S. Hwy 101 SB over Arroyo Parida
Ventura 1959 36,545 Urban minor arterial Pleasant Valley Rd over Route 101
Ventura 1981 33,000 Urban other principal arterial Madera Road over UP RR, Amtrak, Metrolink
Ventura 1966 32,000 Rural arterial State Route 126 over Oleary Creek
Ventura 1979 30,000 Urban other principal arterial Madera Road over Arroyo Simi
Santa Barbara 1964 25,445 Urban other principal arterial Hollister Ave over San Jose Creek
Ventura 1971 22,500 Urban other principal arterial 1st Street over Arroyo Simi
Santa Barbara 1972 17,000 Urban freeway/expressway State Route 154 over LA Colina Rd
Santa Barbara 1972 17,000 Urban freeway/expressway State Route 154 over Primavera Rd
Santa Barbara 1974 16,000 Rural arterial US Highway 101 NB over Refugio Road
Santa Barbara 1974 16,000 Rural arterial US Highway 101 SB over Refugio Road
San Luis Obispo 1959 15,682 Urban minor arterial 24th St over UP RR & Amtrak
Santa Barbara 1966 15,000 Urban collector Clark Ave over US Highway 101
Santa Barbara 1958 14,500 Rural arterial US Highway 101 SB over State Route 135
Santa Barbara 1958 14,500 Rural arterial US Highway 101 NB over State Route 135
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 5 2,124 41,320 0 0 0
Rural arterial 143 133,415 3,075,378 6 5,070 133,000
Rural minor arterial 126 92,647 613,189 4 3,886 12,020
Rural major collector 86 49,832 240,350 8 10,384 19,580
Rural minor collector 37 9,115 37,910 1 231 249
Rural local road 163 53,024 140,391 6 975 1,730
Urban Interstate 0 0 0 0 0 0
Urban freeway/expressway 268 290,136 14,699,825 12 8,430 497,250
Urban other principal arterial 147 206,003 2,971,868 13 21,177 256,144
Urban minor arterial 136 86,654 1,429,712 11 5,770 92,866
Urban collector 92 28,913 366,913 9 3,605 37,084
Urban local road 116 49,482 280,725 8 2,186 27,737
Total 1,319 1,001,345 23,897,581 78 61,714 1,077,660
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 37 $41.7 209,101 16,444
Widening & rehabilitation 0 $0.0 0 0
Rehabilitation 229 $143.0 3,546,030 147,884
Deck rehabilitation/replacement 0 $0.0 0 0
Other structural work 5 $0.1 1,550 625
Total 271 $184.8 3,756,681 164,954

Data includes information for the following area(s): San Luis Obispo County, Santa Barbara County, Ventura County

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.

28
from 35 in 2017

in the nation in % of structurally deficient bridges

1. Rhode Island 23.1%
27. Kentucky 7.1%
28. California 7.0%
29. Idaho 7.0%

7
from 13 in 2017

in the nation in # of structurally deficient bridges

1. Iowa 4,675
6. North Carolina 1,871
7. California 1,812
8. New York 1,757
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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