State Bridge Profile Iowa 2014

State Bridge Profile Iowa 2014

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  © 2015 TheAmerican Road & Transportation Builders Association (ARTBA). All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of ARTBA. Highlights from FHWA’s 2014 National Bridge Inventory Data:  Of the 24,300 bridges in the state, 5,022 bridges, or 21% are classified as structurally deficient. This means one or more of the key bridge elements, such as the deck, superstructure or substructure, is considered to be in “poor” or worse condition.1  There are 1,183 bridges, or 5% of all state bridges, classified as functionally obsolete. This means the bridge does not meet design standards that are in line with current practice.  State and local contract awards for bridge construction totaled $863.01 million over the past five years, 20 percent of highway and bridge contract awards, compared to a national average of 29 percent.  Since 2004, 2,062 new bridges have been constructed in the state and 235 bridges have undergone major reconstruction.  The state estimates that it would cost approximately $6.0 million to fix a total of 14,950 bridges in the state.2 Bridge Inventory: All Bridges Structurally deficient Bridges Type of Bridge Total Number Area (sq. meters) Daily Crossings Total Number Area (sq. meters) Daily Crossings Rural Bridges Interstate 371 263,602 4,323,720 6 4,929 69,850 Other principal arterial 1,211 849,530 4,798,970 23 14,437 86,320 Minor arterial 1,061 556,527 1,948,600 39 32,075 62,430 Major collector 3,415 1,163,328 2,398,653 517 177,471 322,955 Minor collector 3,927 946,809 546,145 740 131,296 83,990 Local 11,954 1,729,951 623,107 3,490 380,823 147,698 Urban Bridges Interstate 340 652,003 8,014,456 11 18,439 246,564 Other freeway 0 0 0 0 0 0 Principal arterial 644 1,069,387 5,753,815 13 26,268 133,170 Minor arterial 520 573,222 3,545,407 50 74,085 260,140 Collector 349 194,382 844,559 39 25,120 81,970 Rural 508 153,580 433,185 94 44,248 51,557 Total 24,300 8,152,321 33,230,617 5,022 929,189 1,546,644 1 According to the Federal Highway Administration (FHWA), a bridge is classified as structurally deficient if the condition rating for the deck, superstructure, substructure or culvert and retaining walls is rated 4 or below or if the bridge receives an appraisal rating of 2 or less for structural condition or waterway adequacy. During inspections, the condition 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 and the individual element displays signs of advanced section loss, deterioration, spalling or scour. 2 This data is provided by bridge owners as part of the FHWA data and is required for any bridge eligible for the Highway Bridge Replacement and Rehabilitation Program. However, for some states this amount is very low and likely not an accurate reflection of current costs. State Bridge Profile Iowa
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  © 2015 TheAmerican Road & Transportation Builders Association (ARTBA). All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of ARTBA. Proposed bridge work: Type of Work Number Cost (millions) Daily Crossings Area (sq. meters) Bridge replacement 7,997 $1.3 1,572,831 1,283,247 Widening & rehabilitation 112 $0.0 137,219 34,037 Rehabilitation 1,350 $0.1 752,157 356,715 Deck rehabilitation/replacement 59 $0.0 65,995 29,927 Other work 5,432 $4.5 2,362,678 1,336,198 Top 10 Most Traveled Structurally Deficient Bridges in the State: County Year Built Daily Crossings Type of Bridge Location Woodbury 1962 35,000 Urban Interstate I-29 over the Channel Floyd River Woodbury 1959 35,000 Urban Interstate I-29 over the Floyd River Scott 1940 31,800 Urban other principal arterial US-67 over the Mississippi River, Railroad and IA 461 (Centennial Bridge) Polk 1957 30,400 Urban Interstate I-35 NB over Railroad, E. P. True Parkway and Jordan Creek Woodbury 1959 30,000 Urban Interstate I-29 over the Union Pacific Railroad and Wall Street Polk 1957 22,650 Urban Interstate I-35 NB over Grand Avenue Polk 1957 22,650 Urban Interstate I-35 SB over Grand Avenue Polk 1942 21,900 Urban other principal arterial IA-415 over NW 66th Avenue Polk 1959 20,050 Urban Interstate I-80 WB over US-65 Polk 1959 20,050 Urban Interstate I-80 EB over US-65 Sources: All data is from the 2014 National Bridge Inventory, released by the Federal Highway Administration in January 2015. Note that specific conditions on bridge may have changed as a result of recent work. Cost estimates of bridge work provided as part of the data and have been adjusted to 2014$ for inflation and estimated project costs. Contract awards data is for state and local government awards and comes from McGraw Hill. Note that additional bridge investment may be a part of other contract awards if a smaller bridge project is included with a highway project, and that would not be accounted for in the total in this profile.