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NORTHEAST ENTRANCE over YELLOWSTONE RIVER

Map

Coordinates:
+44.92028, -110.40556
44°55'13" N, 110°24'20" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:NORTHEAST ENTRANCE over YELLOWSTONE RIVER
Structure number:1570048P0000000
Location:0.64 miles east of Tower
Purpose:Carries highway over waterway
Route classification:Minor Collector (Rural) [08]
Length of largest span:170.0 ft. [51.8 m]
Total length:604.0 ft. [184.1 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:36.4 ft. [11.1 m]
Owner:National Park Service [66]
Year built:1961
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 18 / H 20 [4]
Number of main spans:4
Main spans material:Steel continuous [4]
Main spans design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: September 2018

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:1,982 [as of 2008]
Truck traffic:1% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:43.7
Estimated cost of work:$37,500,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
September 2018PoorPoorSatisfactorySatisfactory198243.7
September 2016PoorPoorSatisfactorySatisfactory198243.7
September 2014PoorPoorSatisfactorySatisfactory198260.5
September 2012FairFairSatisfactorySatisfactory198262.5
September 2010FairFairSatisfactorySatisfactory198262.5
September 2008FairFairSatisfactorySatisfactory198262.5
September 2006FairSatisfactorySatisfactoryGood250062.5
September 2004FairSatisfactorySatisfactoryGood250062.5
September 2001FairSatisfactorySatisfactoryGood250062.5
September 1999PoorPoorGoodGood250059.5