Share:

IA 1 NB over IOWA RIVER

Map

Coordinates:
+41.65794, -91.54165
41°39'29" N, 91°32'30" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:IA 1 NB over IOWA RIVER
Structure number:000000000031720
Location:000010370
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:113.9 ft. [34.7 m]
Total length:341.9 ft. [104.2 m]
Roadway width between curbs:38.1 ft. [11.6 m]
Deck width edge-to-edge:49.5 ft. [15.1 m]
Owner:City or Municipal Highway Agency [04]
Year built:1915
Year reconstructed:1986
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:MS 18 / HS 20 [5]
Number of main spans:3
Main spans material:Concrete continuous [2]
Main spans design:Arch - Deck [11]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: October 2017

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:13,500 [as of 2017]
Truck traffic:4% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Poor [4 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present minimum criteria [6]
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 the assessed or calculated scour condition. [8]
Sufficiency rating:38.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
October 2017PoorFairPoorPoor1350038.0
July 2015PoorFairPoorPoor1295038.0
June 2013PoorSatisfactoryPoorPoor1065039.9
June 2011PoorSatisfactoryPoorPoor1080039.7
June 2009PoorSatisfactoryPoorPoor1100030.5
June 2007PoorSatisfactoryPoorPoor1150045.8
July 2005PoorGoodPoorFair1340051.0
June 2003PoorGoodPoorFair1325051.0
May 2001PoorGoodPoorFair1025051.0
September 1999FairGoodFairFair1035067.0
September 1997FairGoodFairFair1075065.0
November 1995FairGoodFairFair970065.0
November 1993FairGoodFairFair1065065.0
August 1991FairVery GoodFairFair1000065.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Deck
Reinforced Concrete Decksq. ft.17,05911,0735,968180
Superstructure
Reinforced Concrete Archlinear ft.31212401880
Reinforced Concrete Floor Beamlinear ft.8557718220
Substructure
Reinforced Concrete Abutmentlinear ft.9789080
Reinforced Concrete Pier Caplinear ft.1165649110
Joints
Strip Seal Jointlinear ft.20414170200
Bearings
Elastomeric Bearingeach1313000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.342136164420