State Bridge Profile Montana 2016

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State Bridge Profile Montana 2016 2016-02-29T10:37:11+00:00
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Montana Highlights from FHWA’s
2015 National Bridge Inventory Data:

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  • Of the 5,243 bridges in the state, 411, or 8%, 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
  • 503 bridges, or 10%, are classified as functionally obsolete. This means the bridge does not meet design standards in line with current practice.
  • Federal investment in Montana has supported $436.9 million for capital improvements on 636 bridge projects between 2005 and 2014.2
  • Since 2004, 499 new bridges have been constructed in the state; 92 have undergone major reconstruction.
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Ranking

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Top Most Traveled Structurally Deficient Bridges in the State

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CountyYear BuiltDaily CrossingsType of Bridge3Location
Missoula195722,650Urban other principal arterialcity streets over Clark Fork at Missoula-Russell St.
Missoula195822,160Urban other principal arterialUS 12 over Clark Fork at Missoula - Madison St.
Missoula196622,010Urban InterstateI 90 over Int Reserve Street at Missoula
Missoula196215,940Urban minor arterialcity streets over Clark Fork - City St at Higgins Avenue, Missoula
Flathead197510,260Rural arterialS 40 over Whitefish River at 3 mi SE Whitefish
Missoula196310,230Rural InterstateI 90 over Montana Rail Link at 3 Km W Clinton
Missoula196310,230Rural InterstateI 90 over Montana Rail Link at 3 Km W Clinton
Stillwater19709,800Rural InterstateI 90 over Hensley Cr / County Road at 9 Km E Columbus
Stillwater19709,800Rural InterstateI 90 over Hensley Cr / County Road at 9 Km E Columbus
Stillwater19719,800Rural InterstateI 90 over Keyser Creek at 2 Km W Columbus
Gallatin19509,410Rural minor arterialS 205 over Unknown Creek at 2M W Bozeman
Silver Bow19638,920Urban InterstateI 90 over Int I-15 at Butte
Silver Bow19638,920Urban InterstateI 90 over Int I 15 at Butte
Granite19708,910Rural InterstateI 90 over Sep County Road at 17 Km W Drummond
Powell19598,490Rural InterstateI 90 over Int Jens at 13 Km E Drummond
Yellowstone19598,490Urban minor arterialU 1031 over Sep I-90 at 2M SW Billings
Powell19738,360Rural InterstateI 90 over Bn Railroad at 7 Km W Garrison
Yellowstone19697,440Rural InterstateI 90 over Pryor Creek at 15 Km E Billings
Missoula19647,110Rural InterstateI 90 over Clark Fork River at 10 Km E Alberton
Deer Lodge19787,080Rural InterstateI 90 over Int Warm Springs at Warm Springs
Deer Lodge19787,080Rural InterstateI 90 over Int Warm Springs at Warm Springs
Mineral19656,960Rural InterstateI 90 over Int Cyr, Clark Fork at 8 Km W Alberton
Lake20066,780Rural arterialUS 93 over Jocko River Side Channel at 12 Km N Arlee
Mineral19676,670Rural InterstateI 90 over Clark Fork at 10 Km E Superior
Mineral19676,670Rural InterstateI 90 over Clark Fork at 10 Km E Superior
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Bridge Inventory

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Type of Bridge3Number of BridgesArea of All Bridges (sq. meters)Daily Crossings on All BridgesNumber of Structurally Deficient BridgesArea of Structurally Deficient Bridges (sq. meters)Daily Crossings on Structurally Deficient Bridges
Rural Interstate747593,5394,858,2103456,402220,900
Rural arterial480256,0261,554,2602014,22955,560
Rural minor arterial520219,433563,7272820,33451,072
Rural major collector584209,577473,041164,27216,480
Rural minor collector503108,29471,054409,0313,978
Rural local road2,125344,427190,54326137,64425,854
Urban Interstate8473,6511,382,49042,65044,810
Urban freeway/expressway000000
Urban other principal arterial57119,2241,071,18024,83044,810
Urban minor arterial4340,331281,17027,33624,430
Urban collector3316,53436,633000
Urban local road6712,31311,1824382400
Total5,2431,993,34910,493,490411157,110488,294
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Proposed Bridge Work

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Type of WorkNumber of BridgesCost to Repair (in millions)Daily CrossingsArea of Bridges (sq. meters)
Bridge replacement613$2,732.31,564,404273,916
Widening & rehabilitation4$1.2205472
Rehabilitation114$181.3181,01738,908
Deck rehabilitation/replacement6$0.1284438
Other structural work50$124.617,46713,252
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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

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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.

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