The document summarizes bridge data from Montana's 2013 National Bridge Inventory. Some key points: - 7% of Montana's 5,126 bridges, or 376 bridges, are structurally deficient. - 10% of bridges, or 506 bridges, are functionally obsolete. - Between 2003-2012, $365.2 million in federal funding supported construction of 2,136 bridges in Montana. - It is estimated that $3 billion would be needed to repair 806 bridges in the state.

1. © 2014 The American 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 2013 National Bridge Inventory Data:
 Of the 5,126 bridges in the state, 376 bridges, or 7% 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 506 bridges, or 10% of all state bridges, classified as functionally obsolete. This means
the bridge does not meet design standards that are in line with current practice.
 Federal-aid investment in Montana has supported $365.2 million in bridge construction
spending on 2,136 bridges between 2003 and 2012, according to FHWA data.2
 Since 2004, 472 new bridges have been constructed in the state and 93 bridges have undergone
major reconstruction.
 The state estimates that it would cost approximately $3.0 billion to fix a total of 806 bridges in
the state.3
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 748 594,588 4,908,560 31 42,641 226,660
Other principal arterial 450 233,002 1,498,690 14 9,322 42,500
Minor arterial 552 236,809 625,247 21 13,239 18,612
Major collector 584 211,843 498,809 16 4,505 29,345
Minor collector 495 104,616 68,891 42 8,931 4,288
Local 2,038 342,299 183,428 243 35,192 23,635
Urban Bridges
Interstate 84 73,639 1,382,490 1 452 4,960
Other freeway 0 0 0 0 0 0
Principal arterial 56 118,682 1,070,680 3 5,568 63,220
Minor arterial 40 33,944 255,790 1 5,985 15,940
Collector 17 8,471 30,080 0 0 0
Local 62 13,475 9,482 4 382 400
Not classified 0 0 0 0 0 0
Total 5,126 1,971,369 10,532,147 376 126,216 429,560
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
ARTBA analysis of FHWA data, includes all bridge construction related spending on projects approved by FHWA between 2003 and 2012.
3
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
Montana

2. © 2014 The American 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 630 $2,772.6 1,625,172 274,490
Widening & rehabilitation 4 $1.2 205 473
Rehabilitation 117 $158.3 182,415 39,466
Deck rehabilitation/replacement 6 $0.0 279 267
Other work 49 $46.1 18,509 13,161
Top 10 Most Traveled Structurally Deficient Bridges in the State
County Year
Built
Daily
Crossings
Type of Bridge Location
(route/water under the bridge, traffic on the bridge and location)
Missoula 1957 22,650 Urban other
principal arterial
CLARK FORK, CITY STREETS, MISSOULA-RUSSELL ST.
Missoula 1958 22,160 Urban other
principal arterial
CLARK FORK, US 12, MISSOULA - MADISON ST.
Gallatin 1966 18,410 Urban other
principal arterial
INT WEST BOZEMAN I-90, CITY STREETS, BOZEMAN
Missoula 1962 15,940 Urban minor
arterial
CLARK FORK - CITY ST, CITY STREETS, HIGGINS AVENUE
MISSOULA
Gallatin 1963 12,970 Rural Interstate SEP COUNTY ROAD, I 90, 5 KM E THREE FORKS
Gallatin 1964 12,510 Rural Interstate ABANDONED RAILROAD, I 90, 1 KM E MANHATTAN
Gallatin 1964 12,510 Rural Interstate GRADE SEP, I 90, MANHATTAN
Gallatin 1964 12,510 Rural Interstate GRADE SEP, I 90, MANHATTAN
Flathead 1975 10,260 Rural arterial WHITEFISH RIVER, S 40, 3M SE WHITEFISH
Missoula 1963 10,230 Rural Interstate MONTANA RAIL LINK, I 90, 3 KM W CLINTON
Sources: All data is from the 2013 National Bridge Inventory, released by the Federal Highway Administration in March 2014.
Note that specific conditions on bridge may have changed as a result of recent work. Cost estimates of bridge work provided as
part of the data and have been adjusted to 2013$ 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.