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IA 1 over RALSTON CREEK

Map

Coordinates:
+41.65781, -91.52898
41°39'28" N, 91°31'44" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:IA 1 over RALSTON CREEK
Structure number:000000000031740
Location:0.6 MI. N OF N JCT. US 6
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:27.9 ft. [8.5 m]
Total length:61.0 ft. [18.6 m]
Roadway width between curbs:60.0 ft. [18.3 m]
Deck width edge-to-edge:79.4 ft. [24.2 m]
Skew angle:
Owner:State Highway Agency [01]
Year built:1932
Year reconstructed:2004
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Steel continuous [4]
Main spans 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: July 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:15,300 [as of 2018]
Truck traffic:4% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present desirable criteria [8]
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:94.5

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
July 2018FairVery GoodSatisfactorySatisfactory1530094.5
July 2016FairVery GoodSatisfactorySatisfactory1480094.5
July 2014FairVery GoodSatisfactorySatisfactory1720094.3
July 2012FairVery GoodSatisfactorySatisfactory1750094.3
July 2010FairVery GoodSatisfactorySatisfactory1760094.2
July 2008FairVery GoodSatisfactorySatisfactory1740094.3
October 2006FairExcellentSatisfactorySatisfactory2110093.9
February 2005FairVery GoodSatisfactorySatisfactory2110093.9
July 2002PoorPoorPoorFair2090011.8
September 2000PoorPoorPoorFair1580015.3
July 1998FairFairFairFair1660039.1
October 1996FairFairFairFair1370039.5
June 1994FairSatisfactorySatisfactoryFair1610038.5
December 1992FairSatisfactorySatisfactoryFair1560038.6
October 1990FairGoodSatisfactoryFair1510038.7

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.718717010
Steel Protective Coatingsq. ft.3,9533,8817200
Deck
Reinforced Concrete Decksq. ft.4,8564,47438200
Substructure
Reinforced Concrete Pier Walllinear ft.7676000
Reinforced Concrete Abutmentlinear ft.1661174900
Joints
Pourable Jointlinear ft.122012200
Bearings
Fixed Bearingeach128400
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.121121000
Steel Protective Coatingsq. ft.1,4451,445000