Share:

DUCK LAKE RD over SOUTH FORK MILK RIVER

Map

Coordinates:
+48.75761, -113.16591
48°45'27" N, 113°09'57" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:DUCK LAKE RD over SOUTH FORK MILK RIVER
Structure number:S00464016+09001
Location:16M NW BROWNING
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:69.9 ft. [21.3 m]
Total length:70.9 ft. [21.6 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:30.2 ft. [9.2 m]
Owner:State Highway Agency [01]
Year built:1987
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Prestressed concrete [5]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: September 2017

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:790 [as of 2016]
Truck traffic:3% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Better than present minimum criteria [7]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:84.7

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
September 2017GoodGoodGoodGood79084.7
September 2015GoodGoodGoodGood69093.3
September 2013GoodGoodGoodGood69093.3
October 2011GoodGoodGoodGood69093.3
September 2009GoodGoodGoodGood70093.2
October 2007GoodGoodVery GoodGood50094.4
April 2004GoodVery GoodVery GoodVery Good65093.5
May 2000GoodVery GoodVery GoodVery Good63093.6
May 1999GoodExcellentExcellentExcellent55078.4
September 1996GoodExcellentVery GoodVery Good37280.7
April 1994GoodExcellentExcellentExcellent36679.7
November 1991GoodExcellentExcellentExcellent32180.0

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Prestressed Concrete Girder/Beamlinear ft.354354000
Deck
Reinforced Concrete Decksq. ft.2,1312,0617000
Substructure
Reinforced Concrete Abutmentlinear ft.8988100
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.171017100
Steel Protective Coatingsq. ft.513204103103103